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    Journal of East China Normal University(Natural Science) 2006 Vol.2006
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    Studies in Contrast Spatial Structure Solutions for Singular Perturbation Problems(Chinese)
    NI Ming-kang;
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 1-12.  
    Abstract3181)           
    This paper surveys recent developments in studies of contrast spatial structure solutions of singularly perturbed problems, which have rise since the beginning of 1990's. It mainly introduces a series of work about step-type and spike-type solutions in ODE, including critical and uncritical cases. In the
    meanwhile, it introduces the latest research progress of contrast spatial structure of variation problems. The outline of contrast spatial structure solutions in PDE is also included.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 13-14,3.  
    Abstract2303)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 15-16.  
    Abstract2413)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 17-19.  
    Abstract2171)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 20-22.  
    Abstract2353)           
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    The Periodic Solution for A Kind of Parabolic Perturbed Equations(Chinese)
    NI Ming-kang;GU Xi
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 23-30.  
    Abstract3302)           
    The periodic solution for a kind of parabolic perturbed equations including transposed item is discussed. The uniqueness of the solution is proved, and the asymptotic expansion of the solution and remainder estimation are also given.
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    Research of Singular Perturbation Theory in East China Normal University(Chinese)
    华东师范大学 数学系;上海 000
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 35-34.  
    Abstract3190)           
    The growth and development of the research in the singular perturbation theory in the Department of Mathematics at East China Normal University is reviewed, uncovering historical facts in this research area in China. Some outstanding Chinese scientists, such as QIAN Wei-chang, GUO Yong-huai, QIAN Xue-sen and LIN Jia-qiao, have made pioneer contributions in this area.
    The Chinese Culture Revolution interrupted the research. In the late 1970s, after the end of the Culture Revolution, the section on research and teaching of differential equations in the department of mathematics of ECNU decided to make the theory and application of singular perturbation as a research direction. In the early 1990s the research is thriving under the efforts of the
    mathematicians in China. After then, however, was a recession period because of the lack of new researchers. But now, as a result of Chinese Government's continuously supporting of scientific researches, and outstanding mathematicians such as Ni Ming-kang have returned from abroad, the research of singular perturbation is becoming active again at our university and inChina.
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    On the Diophantine Equation x3+1=38y2(Chinese)
    DUAN Hui-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 35-39,1.  
    Abstract2608)           

    This paper has proved that the Diophantine equation x3+1=38y2 has only integer solutions(x,y)=(-1, 0),(31,±28).

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    Multi-periodic Solutions for A Class of Resonance Second Order Systems(Chinese)
    MENG Hai-xia;GUO Xiao-feng
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 40-44,1.  
    Abstract2981)           
    The existence and multiplicity of periodic solutions are obtained for a class of su-perquadratic resonance nonautonomous second order systems ü(t)+k2ω2u+▽F(t, u(t)) = 0, a.e.t ∈ [0,T] by Z2 version of the Mountain Pass Theorem on the condition that is unbounded.
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    A Characterization of the [[alpha]]-[[beta]] Generalized Inverse and Its Reverse Law(Chinese)
    DENG Bin;CHEN Guo-liang
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 45-51.  
    Abstract2764)           
    This paper deals with the case when the α-βgeneralized inverse A(-1)α-β is a linear transformation, in which case we established the characterization of the α-β generalized inverse, and we also give several sufficient conditions that the reverse law holds.
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    Stability of Single-Input Bilinear Sampled-data Systems with Quantization(Chinese)
    YU Hong-wang;WANG Zhi-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 52-56.  
    Abstract3186)           
    The stability of a class of single-input bilinear sampled-data systems with quantization is investigated in this paper. The systems are uniformly globally exponentially stable by proposing a small feedback controller. Based on that,the effect of quantization on the bilinear sampled-data systems are discussed. And under the constrained quantization level, the same stability property of the systems is still concluded.
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    Flexibility of Embeddings of Wheel Graphs on the Torus(English)
    DENG Mo;REN Han
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 57-62,7.  
    Abstract2752)           
    In this paper, we investigate the flexibility of a wheel graph on S1 and determine the structures and the number of embeddings of wheel graphs on the torus. As their applications, the structures of embeddings of some generalized halin graphs (may be nonplanar) on the torus are also determined.
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    The Sequential Mesh Test for A Proportion(Chinese)
    PU Xiao-long;YAN Zhang-geng;MAO Shi-song;ZHANG Ying-shan;LI Yan
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 63-71.  
    Abstract3119)           
    This paper proposed a new sampling plan, the sequential mesh test, in order to overcome the disadvantages of the widely used Sequential Probability Ratio Test (SPRT). The main idea of the new plan is to divide a SPRT test problem into a series of subproblems by inserting a number of test points. The paper presented in detail how to realize the new plan, and showed that
    the new plan has a much better control of the sample number than SPRT does. Finally it showed that the new method is also more powerful than IEC 1123 the well-known international standard for sampling inspection.
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    A Finite Difference Method for Time-periodic Solutions of Nonlinear Parabolic Equations(English)
    WEI Wei;WANG Yuan-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 72-79.  
    Abstract2749)           
    A finite difference method with accuracies of fourth order in space and second order in time is proposed for time-periodic solutions of a nonlinear parabolic boundary value problem. A monotone iterative scheme is developed for proving the existence and uniqueness of the periodic solutions of the nonlinear discrete scheme, and the computational algorithms for the periodic solutions are also provided. The convergence of the discrete scheme is discussed. The numerical results show the advantages of the method.
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    Application of Wu′s Method in Propositional Calculus(Chinese)
    LI Jing;YANG Zong-yuan
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 80-86.  
    Abstract3021)           

    A formal definition of proposition formulae was provided by context-free grammar,and the conversion from proposition formulae to polynomials was solved automatically. Using Wu′s Method, the paper presented another solution to the problem of theorem reasoning. In addition, a method for producing logical deduction was introduced.

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    Automated Geometric Theorem Search MethodBased on Numeric Computation(Chinese)
    XUE Li;HOU Xiao-rong
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 87-91.  
    Abstract2784)           

    A new method based on numeric computation for automated geometric theorem proving and discovering is shown. And a dynamic searching system of geometric theorem has been implemented,which can solve elementary geometric problems efficiently, including some non-constructive problems.

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    Research on A Content-based Secure Architecture Model(Chinese)
    XUE Mei;SUN Shu-feng;GU Jun-zhong
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 92-99.  
    Abstract2888)           

    Based on the smaller information granularity security, granule technology was presented in this paper, and the information content security architecture model was also given. The model-based prototype system exampled with protecting WORD documents was implemented.

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    LOM-Based Community P2P Learning Resource Sharing Model(Chinese)
    YANG Jing;GU Jun-zhong;XUE Mei
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 100-107.  
    Abstract3069)           

    This paper studies the resource sharing in Tele-learning systems.A community P2P learning resource sharing model is proposed and the resource sharing will be restricted in certain communities. The metadata of digital learning resources is stated by LOM standard. By means of distributed metadata management in structured pure P2P topology, the distributed storage and bandwidth can be taken full advantage. The constitution of community, the publication and retrieval of learning resources are specified in this paper as well as implement of the model.

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    Research on Dynamic Synchronization Technology of Webpage Database(Chinese)
    XU Wen-tao
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 108-115.  
    Abstract3353)           

    There are plenty of local copies of pages of remote web sites on local databases on most of web search engine sites. It is necessary to pull remote web pages periodically to refresh local copies of these pages on database in order to keep copies and source pages consistent,and which takes plenty of time and resources.The article proposes serveral policies to synchronize copy and source pages , proposes a Poission model of source page change, define freshness and fresh time, studies on these policies and compares their effectiveness.It is shown that the proposed policies improve the freshness of web pages significantly.

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    Silver Nano-particles Synthesized on Porous Silicon by Thermal Decomposition(Chinese)
    FENG Xiao;XU Shao-hui;ZHU Zi-qiang
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 116-119.  
    Abstract2780)           

    Uniform Ag nano-particles was synthesized within nanoscale pores of oxidized porous silicon (OPS) by a simple solution immersion-thermal decomposition approach,forming the compound structure of Ag/OPS/silicon. Ag films deposited on OPS were characterized by X-ray diffraction, and SEM showed the existence of silver nano-particles.

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    Analyzing of Quantum Information Experiment in Operator(Chinese)
    ZHANG Zhi-jun;LI Jin-fang;MA Lei
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 120-125.  
    Abstract2726)           

    In this paper, we defined lowering and raising operator of single photon's two polarization states, and used the theory of linear transformation of operator in Fock space to study BS, PBS, wave plate and H transformation. We obtained their representation of operator .On the base of this; we studied some quantum information experiment, e.g. Teleportation, from a new aspect. Using the new representation, we can analyze the probability of photons output states .To do this, we try to find a new method to devise experiments much efficiently.

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    Differential Algorithm in Wave-height Measurement(Chinese)
    LI Yi-xiang;ZHENG Zheng-qi;JIANG Song-ying;KANG Wei
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 126-131.  
    Abstract2949)           

    This paper advances a novel measurement of wave-height — differential algorithm.Compared with electric level method, the differential algorithm has its advantages. This article details its principle,algorithm and demonstrates it with a living example.

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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 132-135.  
    Abstract2236)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (1): 136-139.  
    Abstract2346)           
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    Syntheses and Biological Activity of Novel Heteroretinoids(Chinese)
    CHEN Zhen;WANG Jing;XU Zi-jin;ZOU Xin-zhuo
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 1-6.  
    Abstract2796)           

    Syntheses of three novel heteroretinoids were reported. Novel heteroretinoids were 5-(5,6,7,8-Tetrahydro-5,5,8,8-tetramethyl-2-naphthalenyl)-3-pyrazole carboxylic acid, 2-Methyl -5-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-furan-3-carboxylic acid, 1-Butyl -2-methyl-5-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-1H-pyrrole-3-carboxylic acid.The results of biological test indicated that these compounds possessed some growth inhibition effects in leukemia cells.

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    Determination of Content of RNA in Yeast by Capillary Zone Electrophoresis with Amperometric Detection(Chinese)
    CHEN Xiang;WANG Qing-jiang;DING Fei;LU Jin;HE Pin-gang;FANG Yu-zhi
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 7-12.  
    Abstract3232)           
    The indirect determination of the content of RNA in yeast by analyzing adenine (A) and guanine (G) with capillary electrophoresis with amperometric detection (CE-AD) was reported. The effects of potential of working electrode, running buffer, separation voltage and injection time on the CE-AD determination were investigated. Adenine and guanine could be well separated in a 30 mmol/L borate buffer (pH 9. 0) within 18 min under the optimum conditions. Their detection limits of adenine (S/ N = 3) of 2.0 ×10-7 mol/ L and 1.7 ×10 -7mol/ L, respectively. The experimental results showed that this method is of high sensitivity and high repeatability, and potential to be used in the quick analysis of yeast in foods.
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    Determination of Sinapic Acid,Quercetin and Protocatechuic Acid in Allium cepa Linn by Capillary Zone Electrophoresis with Electrochemical Detection(Chinese)
    GENG Cheng-huai;CHU Qing-cui;YE Jian-nong
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 13-17.  
    Abstract3292)           
    A simultaneous determination of sinapic acid, quercetin and protocatechuic acid in Allium cepa Linn by capillary aone electrophoresis with electrochemical detection was reported. The parameters affecting the separation and detection such as detection potential, separation voltage and concentration of running buffer were evaluated. Under the optimum conditions, the analytes were baseline separated within 25 min in a borax buffer (PH=9.0). Good linear relationship was established between peak current and concentration of analytes in the range of 2.0×10-7-1.0×10-4g/mL for sinapic acid, 2.0×10-7-5.0×10-5g/mL for quercetin, and 5.0×10-7-5.0×10 -5g/mL for protocatechuic acid. The detection limit (S/N=3) is 1.5×10-7g/mL,1.6×10-7g/mL and 3.6×10-7g/mL respectively for these three analytes. This method has been used for the determination of active ingredients in allium cepa linn with satisfactory results.
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    Analysis of Remote Sensing Image Format —— GeoTIFF(Chinese)
    CHEN Duan-wei;SHU Jiong;WANG Qiang;DUAN Yu-sen
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 18-26.  
    Abstract7132)           
    GeoTIFF, a geographically extended image format of TIFF, was studied in this paper. Description and analysis were given to TIFF format, storing methods of GeoKeys, three kinds of coordinate systems supported by GeoTIFF, six GeoTags and their relationships, as well as coordinate transformation and geocoding. Advantages of GeoTIFF were explained, and its application prospect is anticipated.
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    Component GIS for Census in Pudong New Area(Chinese)
    WANG Yuan-fei;ZHOU Feng;LIU Zhi-qiang;MI Wei-jie;LU Tao;DING Jing-hong
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 27-32.  
    Abstract3550)           
    A census GIS, which named as Pudong New Area Census GIS (PucGIS), was developed using techniques of component GIS, data ware house, demographic and population modelling. The detailed demographic index was designed in the system for exploring more information from census database. The technology of data ware house was used in census database designing, Pudong New Area census data was partitioning in spatially by the census block, which coincide with the political boundary of Jiedao or Zheng. This two level database improving the execution efficiency of PucGIS greatly.
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    Analysis on the Relationship between Heavy Rainfall and Features of Environmental Fields(Chinese)
    DAI Xiao-yan;GUO Zhong-yang;SU Jun-yi;GU Xin-ye
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 33-40.  
    Abstract2979)           
    Hong Kong Observation Operational Regional Spectral Model (ORSM) forecasting physical values in June and July 2002 were used to explore the large-scale atmosphere circulation situations and physical conditions causing continuously severe rainfall in the south of China by analyzing the features of average geopotential height field, temperature field, humidity field, meridional and zonal wind velocity field when heavy rainfall took place. The study of the thermodynamic and dynamical field near the heavy rainfall belt indicates that in temperature field, at the low and middle level of atmosphere, the heavy rainfall belt lies in the comparatively colder zone south of the high temperature zone with lower gradient, while the gradient is higher in the north of the heavy rainfall belt. On the other hand, in humidity field, the heavy rainfall belt is located in the high humidity zone, while at the low level of atmosphere, it is in the south of relative humidity gradient zone. Furthermore, in wind velocity field, at the low level of atmosphere, the heavy rainfall belt existed in the convergence zone of the east and west winds, south and north winds.
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    Characteristics of Hydrology and Sediment Transportation and Influence by Reservoir Project in the Meimaosha of Yangtze Estuary(Chinese)
    ZUO Shu-hua;LI Jiu-fa;YING Ming;SHI Lian-qiang;XU Hai-gen
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 41-48.  
    Abstract3666)           
    Using the data of years, including the latest in situ data observed in Meimaosha and adjacent water areas in the southern passage of the Yangtze Estuary in Sep., Dec. 2003 and Jan. 2004, characteristics of hydrology and sediment were studied by the multi-methods of hydrology, sediment transportation and statistics. The results show that tidal currents show a strong ebb dominance as velocity of the ebb current is larger than the flood current, time of the ebb current longer than the flood current. In general, the average suspended sediment concentration is 1.40 kg/m3 during the period of the spring tide and 0.60 kg/m3 during the period of the neap tide respectively. The observed data also show that suspended sediment concentration during the flood season is higher than that of during the dry season. Suspended sediment concentration of the flood tide is higher than the ebb tide in the spring tide during the flood season, which is contrary in the neap tide. During the dry season either in the spring tide or in the neap tide, suspended sediment concentration of the ebb tide is higher than the flood tide. The change of the suspended sediment concentration gradient is evident. The variety of the current velocity and suspended sediment concentration after the ecotypic reservoir project have been constructed with the current continuity equation and a linear regression formula of sediment carrying capacity. The result show that it will affect the Nanhui tidal flat in a certain extent.
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    Differentiation of the Ciliature and the Base-Associated Fibers of Onychodromus quadricornutus during Asexual Divisions(Chinese)
    Zhu Hui;Zou Shi-fa;Ni Bing;Gu Fu-kang
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 49-57.  
    Abstract3075)           
    The differentiation of the ciliature and the base-associated fibers during asexual division of the fresh water ciliate, Onychodromus quadricornutus (Foissner et al. 1987) were observed by using protargol staining technique. During asexual division of O. quadriconutus, AZM and PM of the proster is formed at the site where the old oral structures is located and there is no detectable close relations between the new and old structures during the morphogenesis of left and right marginal cirri, the phenomena different from what found in some known oxytrichids. The cirri base-associated fibers of O. quadriconutus include anterior and posterior longitudinal fibers, transverse fibers and radiating fibers. The appearance of these fibers are similar to that observed in some known ciliates, except for that of the transverse fibers of left marginal cirri which differs from the known ciliates in location. During morphogenesis, the old ciliatures together with their base-associated fibers begin to degenerate and disappear in the primordial zone of new anterior and posterior FTV cirri. The base-associated transverse fibers of the old left and right marginal cirri are observed to be the first to disintegrate and degenerate. The disintegration of the base-associated transverse fibers in these parts of old structures shows a close relation with the differentiation of the primordial zone, suggesting an important role of this disintegration in supplying differentiation and development of the primordium with some substances. Other old ciliatures and the base-associated fibers can remain for a relative longer time in the cortex and finally begin to degenerate and disintegrate when their function declines gradually.
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    Effects of Symbiont on Saline Tolerance and Isozymes of Host in Paramecium bursaria-Chlorella System(Chinese)
    SUN Jun;ZHANG Ying;GU Fu-kang
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 58-62.  
    Abstract2911)           
    To further investigate the effect of symbiotic Chlorella on physiological process and metabolism of the host P. bursaria, NaCl or Pb(NO3)2 tolerance and 12 types of isozyme of Chlorella-containing P. bursaria(CCP) and recovered Chlorella-containing P. bursaria(RCCP) and Chlorella-free P. bursaria(CFP) were analyzed. The results showed that NaCl tolerance of CCP was similar to that of RCCP, different from that of CFP, and that Pb(NO3)2 tolerance and activity of isozymes of CFP were similar to those of RCCP. RCCP showed the transitional characteristics between CCP and CFP. Diverse composition and activity of isozymes of among the three samples indicated existence or symbiotic time of Chlorella could change the isozyme system of the host. Fewer composition and lower activity of isozyme in CCP probably implied that due to the symbiosis of Chlorella, isozyme system of the host degenerated in “P. bursaria - Chlorella” system.
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    Function of gp150 in the Differentiation of Stalk Cell during〖WTHX〗 Dityosteliun Discoideum Development(Chinese)
    HOU Lian-sheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 63-67.  
    Abstract3383)           
    Cells of Dictyostelium discoideum are trigged to undergo development when they are depleted their food source. Cell adhesion molecules play an important role in maintaining the integrity of cell aggregation and influencing subsequent cell-type differentiation and cell sorting. At the loose aggregation stage , gp150 was localized on the peripheral area of multicellular aggregation.At the slug stage, the prespore cell domain and prestalk cell domain were separated by the gp150 molecule, quantity of the gp150 molecule become to increase in the pretalk cell domain following Dictyostelium discoideum development. Thus the temporal of gp150 molecule expression and the special localization of gp150 molecule are related with the differentiation of stalk cells Dictyostelium discoideum development.
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    Optimization of PCR Conditions for Macrobrachium nipponensis Gene Fragments(Chinese)
    ZHAO Xiao-qin;NI Juan;CHEN Li-qiao;GU Zhi-min;ZHOU Zhi-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 68-74,8.  
    Abstract3166)           

    Genomic DNA was isolated from the musculature of Macrobrachium nipponensis to establish a reproducible and stable PCR technical system. The ingredients and programs of amplified reactions were optimized respectively. The results showed that the profiles of PCR products could be improved obviously by using the 25 μL solution of 10×Buffer 2.5 μL, Mg+2 1.5 mmol/L, 4×dNTP 0.2 mmol/L, 1 U Taq DNA polymerase, 0.4 μmol/L of each primer and 200~300 ng of DNA template as well as the programs of 5 min at 95 ℃, 35 cycles of 1 min at 95 ℃, 50 s at 56 ℃, 1 min at 72 ℃ and finally, 10 min at 72 ℃. The optimized conditions could result in satisfactory specificity and reproducibility in amplifying 18S rRNA,COI,ND5 gene fragments, and consequently provide a useful means for the research of genetic diversity, molecular marker and germplasm identification in Macrobrachium nipponensis.

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    Digestive Enzyme Activities and the Contents of the Amino Acid during the Embryonic Development of Macrobrachium nipponense(Chinese)
    ZHAO Yan-min;ZHAO Yun-long;Wang Qun;YAO Jun-jie;AN Chuan-guang;DUAN Xiao-wei
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 75-81.  
    Abstract3173)           

    Amino acids composition and activities of four digestive enzymes including pepsin, tryptase, amylase, cellulase were determined in the eggs of freshwater prawn, Macrobrachium nipponense. These eggs were sampled from different embryonic development stages. The results indicated that digestive enzymes activities and amino acids correlated closely with the stages of embryonic development. Activities of pepsin, tryptase and amylase were relatively high during the whole embryonic development stages. Activities of pepsin, tryptase and amylase were high in early and late developmental stages, but relatively low during middle stages. Cellulose activity was low and showed no obvious change during different embryonic development stages. During protozoea stage, activities of pepsin, tryptase and amylase increased obviously. The content of dissolvable protein and amino acid had a decreased trend. It had relevance to the activities of related enzymes. However, content of the dissolvable protein and amino acid during gastrula stage were higher than that of during blastula stage. Among all the amino acids determined, content of Glu was the highest, the highest essential amino acid (EAA) content was Leu. There was little difference between the ratios of content of single EAA to total EAA during different stages of embryonic development of M. nipponense.

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    Comparative Study of Trypsinase Digestion and Homogenization in Acquiring Free Sperms from Eriocheir Sinensis(Chinese)
    MA Qiang;WANG Qun;LI Kai;DING Ying-di
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 82-87.  
    Abstract2838)           

    The purpose of this paper was to compare two methods of acquiring free sperms from spermatophores of Chinese mitten-handed crab (Eriocheir sinensis). Under the condition of pH 7.4 and different reaction temperatures (27 ℃,32 ℃,37 ℃,42 ℃and 47 ℃, respectively), trypsinase concentrations (0.05 %, 0.10 %, 0.15 %, 0.20 % and 0.25 %, respectively) and reaction times(5 min,10 min,15 min,20 min and 25 min, respectively), the best reaction condition of trypsinase digestion method (TDM) was studied by orthogonal tests and the sperm amounts which got from each gram of spermatophores was used as a criterion. According to the results of orthogonal tests, we found that enzymatic reaction time was the primary factor, and the reaction temperature and the trypsinase concentration also functioned. The maximum effect of trypsinase digesting works at temperature 37 ℃, trypsinase concentration 0.20 % and time 5 min. By using TDM the amounts of free sperms acquired from each gram of spermatophore were 7.41×108 which was significantly higher than that using HM which was only 3.33×108 and the sperm mortality rate was 4.75 % by using TDM which was significantly lower than that using HM which was 27.00 %. Furthermore, the acrosome reaction ability was detected by artificially-induced methodology and the reaction rates were 62.3 % (TDM) and 64.5 % (HM), and there was no significant difference between them. These results suggest that TDM is more effective than HM in acquiring free sperms.

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    15α-Hydroxylation of 13-ethy1-estr-4-ene-3,17-dione Using Immobilized Penicillium raistrickii by Calcium Alginate gel Embedding Methd(Chinese)
    LI Jun;GENG Xu;ZHANG Pei-jun;WU Zi-rong
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 88-92.  
    Abstract2580)           

    15α-hydroxylation of 13-ethyl-estr-4-ene-3,17-dione using immobilized Penicillium raistrickii entrapped in calcium alginate gel was studied. The conversion conditions, which affected hydroxylation such as substrate concentration, the time to add substrate, conversion duration, were investigated. The results show that, the immobilized Penicillium raistrickii can be utilized repeatedly five times with no obvious decline of hydroxylation ability.

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    Effect of Puararia Flavonoids on AGEs Induced Bovine Vascular Endothelial Cells Injury in Vitro(Chinese)
    XU Min-hua;YE Xi-yun;ZHANG Long;WANG Yao-fa
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 93-97.  
    Abstract2703)           

    The effects of Puararia flavonoids(PF) on bovine vascular endothelial cells(VEC) in vitro injured by advanced glycation end products(AGEs) were investigated. When VEC was incubated with AGEs(4 g/L) for 48 hours, the growth of VEC was enhanced, the contents of lactate dehydrogenase(LDH) and malondialdehyde(MDA) and lipofuscin(LPF) were markedly increased(P<0.01), the contents of nitric oxide(NO-2/ NO-3) and glutatuhione(GSH) were reduced. Treatment with PF caused a reduction in LDH and MDA and LPF, the contents of GSH and NO-2/ NO-3 were increased. The results suggest AGEs has direct effects on VEC, perhaps oxidative stress participates in this process. PF can protect cultured VEC from being injured by AGEs, thereby exert favorable effect against the occurrence and development of chronic vascular complications in diabetic mellitus.

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    Regulation and Tissue Specific Expression of VHA-c3 of Arabidopsis Thaliana(Chinese)
    XU Ping;LI Xiao-fang;ZENG Wei-jun;WANG Shui-ping
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 98-104,.  
    Abstract2966)           

    Gene expression of VHA-c was detected in Arabidopsis silique, flower, leaf, bolt, root. However, the expression level of VHA-c3 was much higher in leaves than in the other tissues. Analysis of the putative promoter of VHA-c3 was carried out in tobacoo leave system. A series of the promoter mutants were constructed in which various extents of VHA-c3 promoter were placed upstream of the GUS gene in vector pC1305.1. The expression of GUS was analyzed by Agrobacterium-mediated transient expression system.It was found that a 2 812 bp promoter region has high gene expression capacity. And there is a high potential key cis-element for leaf-specific expression between 2812-2 234 bp region.

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    Caloric Values of Seven Dominant Species in Tiantong NationalForest Park, Zhejiang Province, China(Chinese)
    CHEN Bo;YANG Yong-chuan;ZHOU Ying
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 105-111.  
    Abstract3447)           

    The ash contents and caloric values of different aboveground organs for three dominant tree species and four dominant shrub species in the east subtropical evergreen broad-leaved forest in Tiantong National Forest Park(TNFP), Zhejiang Province were studied in the paper. The results showed that the gross caloric values (GCV)and the ash-free caloric values(AFCV) of various aboveground organs are different among dominant species, the GCV and AFCV of three dominant tree species can be ranked in a decreasing order as Schima superba> Castanopsis carlesii > C. fargesii, and their GCV and AFCV during mature trees are the biggest among the different developmental phases. Meanwhile the GCV and AFCV of the three tree species during the saplings and seedlings are higher than those of shrub species too. GCV and AFCV of the same organ in different aboveground layers decreased from tree species to shrub species, therefore it suggested that the caloric values are closely related to the light gradient within the community. For the same species, the caloric values altered greatly among different organs, the GCV and AFCV of leaves are higher than those of branch and bark. The paper also showed that the gross caloric values are affected obviously by the ash contents.

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    Community Structure and Seasonal Change of Soil Animals in Castanopsis Fargesii Forest at Tiantong, Zhejiang Province(Chinese)
    YI Lan;YOU Wen-hui
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 112-120.  
    Abstract3376)           

    A four-season investigation was conducted on the soil animals in the litter layers and soil layers depth of 0-15 cm of Castanopsis fargesii forest at Tiantong, Zhejiang province during September, 2003 and July, 2004. The litter layer includes fresh litter layer (L), fermentation layer (F) and humus layer (H).Soil animals amount to a total of 32, 657 in number, including macrofauna, mesofauna and wet types, falling into 10 classes and 27 groups respectively. For soil macrofauna, the dominant groups are Coleoptera, Hymenoptera and Blattoptera, while for mesofauna, they are Acarina and Collembola and for wet type ones, Nematoda. The results of the investigation indicate that: (1) the group numbers and density are all greater in the litter than in the soil depth of 0-15 cm; (2) the vertical distribution of soil animals in the litter differs from that in the soil, the group numbers in the former tend to increase gradually from top to bottom,with those in bottom humus layer the largest; altogether 18 groups are found in it;large numbers of individuals are seen in the middle fermentation layer and in the bottom humus layer, with those in the former greater, both accounting for 77.04 % of the total; (3) the DG index (density-group index) reveals a seasonal change of soil animal community diversity as autumn >spring>winter>summer; (4) the vertical distribution of dominant groups varies with seasons in a regular manner, thus influencing the seasonal change of the vertical distribution of the entire community.

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    Saplings Nutrient Characteristics of Common Plants in Tiantong National Forest Park(Chinese)
    SHI Jia-yue;WANG Xi-hua;YAN En-rong;CHENG Ming-hua
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 121-129.  
    Abstract2970)           

    The investigation of nutrient contents of 39 common species was carried out in Tiantong National Forest Park. The results reveal that the leaf N contents of evergreen-broad leaved trees range from 1.059% to 2.896%,P contents range from 0.069% to 0.126%, the leaf N contents of deciduous-broad leaved trees range from 1.868% to 3.254%, and P contents range from 0.092% to 0.186%. The leaf N contents of coniferous tree Pinus massoniana is 1.874% (N), and the P contents of 0.078%. Average nutrient contents in all organs are different, average nutrient contents in stem and root are lower, and the leave are highest among organs. N and P contents are closely correlated in different organs. Deciduous broad-leaved species have consistently higher leaf N and P than evergreen broad-leaved species, but there are no significant differences in stems, branches and roots. The nutrient contents of trees are higher than shrubs among evergreen broad-leaved species. According to nutrient contents,the common and dominant species in different succession stages can be classified into three groups,nanmely, the rapid growth strategy group, the nutrient retention strategy group and the other group.In addition, there is a correlated relationship between N and P contents in different organs and the correlation cofficient is in the order: leaf>stem>branch>root.The positive relationship between N and P for the need of different organs is also observed.

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    Vegetative Dispersal Ability of Spartina alterniflora in Eastern End of Chongming Island(Chinese)
    ZHANG Dong;YANG Ming-ming;LI Jun-xiang;CHEN Xiao-yong;
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 130-135.  
    Abstract3125)           

    Smooth cordgrass(Spartina alterniflora)is one of the most notorious invader plants and was listed in the alien invader species of China in 2003. The area of smooth cordgrass in Shanghai was about 3592 hm2. However, few information was available about its vegetative dispersal ability in the nature. In the present study, we surveyed the distribution in Shanghai and estimated the vegetative dispersal ability in Eastern End of Chongming Island, Shanghai. Strong vegetative growth was observed in individuals and patches of smooth cordgrass. After 9 months'growth, smooth cordgrass individuals could develope 86 to 222 ramets per genet. The largest dispersal distance was 226 cm for individual smooth cordgrass. Mean dispersal distance of smooth cordgrass patches was 107 cm and the largest was 263 cm. At last, some strategies based on the observations had been proposed to control the rapid spreading of this species.

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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (2): 136-140.  
    Abstract2261)           
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    K-groups Structure of Tracial Limits of C*-algebras(English)
    YANG Xin-bing;HU Shan-wen
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 1-7.  
    Abstract2635)           
    Let A=(t4)lim (An,Pn) be the tracial limit of a sequence of unital C*-subalgebras An, this paper proved that (1) united manners of the structure of K0(An) can be transmitted to K0(A); (2) for ∨n ,n∈N and if the natural maps ikn:Uk(An)/Uk0(An) --> K1(An) are surjective, then ∨k∈N,ik:Uk(A)/Uk0(A) --> K1(A) are surjective too.
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    Closing Property of C*-Algebras with Tracial Limit(English)
    XIAO Xiang;HU Shan-wen
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 8-14.  
    Abstract2908)           
    It was shown that there are some C*-algebras maintaining the closing property with the tracial limit, especially under the condition of simplicity. Suppose A=(t2)limn -> ∞ (An,pn). If each An admits at least one tracial state or has SP-property, then A has the same case. Suppose A=(t3)limn -> ∞ (An,pn) and A is simple. If TR(An)=0, tsr(An)=1 and An has Cancelation of Projection, then A has the same case.
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    C1,1 A Priori Estimates for the Christoffel-Minkowski Problem(English)
    XU Lu
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 15-20.  
    Abstract2668)           
    Based on Bernstein's technique, this paper established the C1,1 a priori estimates for degenerate Hessian equation on Sn, which is corresponding to Christoffel-Minkowski problem in convexity geometry. It refined the results of Krylov.
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    Normal Family of Holomorphic Functions(English)
    WANG Xiao-jing;PANG Xue-cheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 21-25.  
    Abstract2726)           
    A normality criterion for a family of holomorphic functions was got. Let F be a family of holomorphic functions on the unit disk ⊿, all of whose zeros are of multiplicity at least m; let M,N be two positive numbers; if for any fF, f(z)=0
    => |f(m)(z)|M ,f(m)(z)=1 => |f(z)| ≧N , then F is normal on ⊿.
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    Some Properties of Three Kinds of Generalized Inverses(Chinese)
    ZHU Chao;CAO Li-qiong;CHEN Guo-liang
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 26-31.  
    Abstract3033)           
    This paper investigated three kinds of widely used generalized inverses of matrices: they are {1,3} and {1,4} inverses, and generalized Bott-Duffin inverse of L-zero matrices. Some new expressions and properties are obtained; and examples are given to illustrate their applications in finding least-square solutions and minimum problem solutions.
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    Optimization Conditions and Wolfe Type Duality Theory of Semi-preinvex Multiobjective Programming(Chinese)
    JIANG Wei-qiong
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 32-36.  
    Abstract2692)           
    Sufficient and necessary conditions of the efficient on semi-preinvex multiabjective programming are obtained. Based on these, the wolfe type dual is discussed and the corresponding duality are established.
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    Classes of Upper Embeddable Graphs with Specific Minimum Degree-Sum of Vertices in Independent-Set(English)
    GAO Yan-bo;REN Han
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 37-43.  
    Abstract2965)           
    Combined with the edge-connectivity, this paper investigated the upper embeddable graphs with specific minimum degree-sum of vertices in its independent-set, and obtained the following results. (1) Let G be a 2-edge-connected simple graph, if G satisfies the following conditions: for any 3-independent set I in G, ∨xi ,xjI (i,j = 1,2,3), d(xi ,xj)≧3 (1 ≦ i j ≦ 3) =>
    i = 13 d(xi) ≧ v + 1(v = | V(G)|}), then G is upper embeddable; (2) Let G be
    3-edge-connected simple graph, if G satisfies the following conditions: for any 6-independent set I in G, ∨xi ,xjI (1≦i,j≦6), d(xi,xj) ≧3(1 ≦ i j ≦ 6) => ∑i = 16 d(xi) ≧ v + 1(v = | V(G)|), then G is upper embeddable.
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    On the Existence of Wavelets for Non-Expansive Dilation Matrices(Chinese)
    GUO Feng-chen
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 44-50.  
    Abstract2578)           
    Let D be a collection of invertible n×n real matrices and Γ a collection of points in Rn. this paper proved that when D={Aj,j∈Z}, A is a real n×n matrix, such that
    A be diagonal matrix with submatrices us its elemets, where A1 is expansive, A2 is idempotent with det A2≠0, then there exists a (D,Γ) wavelet.
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    Periodic and Solitary Wave Solutions to Generalized Compound KdV-mKdV Equations(English)
    DONG Ming;LI Zhi-bin
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 51-59.  
    Abstract2846)           
    A Jacobi elliptic function expansion method was used to solve generalized compound KdV-mKdV equations. Before this a transformation was introduced to simplify the solving process. Many solutions were obtained through this method, and some of them can be deduced to solutions of some famous nonlinear equations with particular parameters.
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    Output Feedback Adaptive Controllers for a Class of Uncertain Nonlinear System Including Delayed Perturbations(Chinese)
    XU Jian-qiang;CHEN Shu-zhong
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 60-65.  
    Abstract3191)           
    The problem of output feedback adaptive stabilization for a class of uncertain dynamic system including time varying delayed perturbations was discussed.The uncertainties were assumed to satisfy the so-called matching conditions and the transfer function matrix of the nominal system was strictly feedback positive real.By using of the Lyapunov stability theory and Lyapunov-Krosovskii functional we proposed an output feedback adaptive controller,which guarantees that the closed-loop system is globally stable i the sense of uniform ultimate boundedness. Finally, an illustrative example was given to demonstrate the validity of the results.
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    Level Set Approach for Image Segmentation Based on Extended Chan-Vese Model and AOS Scheme(Chinese)
    XU Sheng;LI Zhi-bin
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 66-70,1.  
    Abstract3190)           
    A new level set approach for image segmentation was proposed based on the piecewise-constant Mumford-Shah model developed by Chan and Vese, The approach used AOS scheme, which is unconditional stable, to discrete the level set function. Besides, extended fast marching method for constructing the signed distance function was introduced to reduce the amount of computation significantly.
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    Simulation and Optimization of Stochastic (s, S) Inventory System Based on Genetic Algorithm(Chinese)
    JIANG Chang-hua;HU You-hua
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 71-76.  
    Abstract3351)           
    System simulation was used to optimize stochastic inventory. It combined genetic algorithms with simulation of discrete event system and used genetic algorithms to guide the choice of control variables.A new selection operation and a candidate policies′ collector were proposed to overcome the randomicity of a stochastic inventory system.Test results of a (s, S) inventory system showed that the solution proposed is feasible and effective.
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    Algorithm for Extracting Contour and Generating Chain Code Tree(Chinese)
    CHEN You-Guang;ZHANG Wei;HUANG Sui
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 77-85.  
    Abstract3254)           
    A new method to trace region contours and generate chain code tree was proposed by defining the vertex chain code and constructing the pixel vertex matrix of binary images. While tracing contours of a region and extracting vertex chain codes of these contours, the chain code tree of the contours is created. Further more, the complexity of the algorithm is linear and it can be used for tracing the contour of any complex region.
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    Preemptive Routing Algorithm Implemented by Link Prediction(Chinese)
    NIAN Mei;WANG Neng
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 86-92.  
    Abstract2825)           
    A routing algorithm for Ad Hoc Networks associating reactive and proactive protocols, called preemptive algorithm, was proposed. The network nodes estimated valid duration of the link when the received signal strength was below the dangerous power threshold. If the estimated valid time was less than the response time,finding an alternative local route was triggered and the to-be-broken route was substituted before the dangerous link was broken. The simulation result shows the extended AODV protocol with the preemptive algorithm proposed significantly reduces the number of lose packets due to the broken paths,decreases the packet delivery delay in the situation of heavy traffic.
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    Design and Implement of a Knowledge-Based Crawler(Chinese)
    YANG De-ren;GU Jun-zhong
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 93-98.  
    Abstract2705)           
    Web page arrival principles,a knowledge modeling method,and a mapping mechanism between the model and pages were introduced. The main components of knowledge-based Crawler and its several key implementation techniques were presented. A knowledge relativity model was offered. This knowledge extraction method is useful to build next generation intelligent search engine.
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    Implementation of Distributed Education Resource Service System Based on Data Grid(Chinese)
    WU Yong-he;MA Xiao-ling;XIAO Jun;ZHU Zhi-ting
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 99-108.  
    Abstract3002)           
    This paper studied a distributed education resource service system named ERSDG, which based on grid in order to share and use Shanghai Education Resource. First, Globus Toolkit was indroduced, the framework and functions of ERSDG were elaborated, and specifications of resource file name and types of resource node were brought forward; and then system realization from synchronizing data,resource access service and monitor management were discussed. At last we analysed ERSDG′s performance on test of synchronizing data, user access and system monitor.
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    Algorithm for Resource Scheduling Based on Economic Model(Chinese)
    ZHENG JUN;YAN Li-hui;REN Jiao-na;Xue Li
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 109-113.  
    Abstract2886)           
    A new scheduling algorithm based on economic model was proposed, which extends classic optimization algorithm, keeping the time of computation at the minimum. The algorithm takes “deadline” and “budget” which are provided by different gird users, into consideration. The performance of this new scheduling algorithm, achieving lower job completion time and satisfying user′s QoS demand, is demonstrated by its implementation on Gridsim.
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    Magneto-Impedance Effect of DC Joule Annealing on NiFeP Composited Wires(Chinese)
    WU Shi-rong;YUAN Wang-zhi;RUAN Jian-zhong;ZHAO Zhen-jie;YANG Xie-long
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 114-119.  
    Abstract2980)           
    NiFeP/CuBe composite wires were produced by electroless-deposition, then were annealed using a DC Joule annealing technique for certain time in the environment of nitrogen gas. The experiments showed that DC Joule annealing may induce circular anisotropy in the ferromagnetic layer, thus the GMI effect of the composite wires is increased greatly. When the annealing current is 2.8 A and the annealing time is 2 minutes, the sample’s GMI effect reaches the highest value of 53.2% at 475 kHz.
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    GSM and GPS Application Research Based on Sistang Handy Device under Embedded Linux(Chinese)
    LI Wai-yun;HU Wen-jing;LIU Jin-gao
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 120-125.  
    Abstract3363)           
    The data format of short message in GSM and GPS was explained briefly, then the embedded Linux operation system was transplanted on the Sistang board. The hardware and the application software were researched about position navigation, remote control, personal communication etc. that based on embedded Linux handy device, and these application programs were designed under embedded Qt software design platform.
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    Design of USB Interface Program for Embedded Apparatus(Chinese)
    ZHU Ren-long;ZHAO Jun-yi;HUANG Yong
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 126-133.  
    Abstract2739)           
    A simplified method for USB(Universal Serial Bus) interface programming for embedded devices was proposed by adding some new functions (“head file”,“macro” and “code generator”) in the assemble compiler. A real application example “An analog signal logging unit based on ET44M210 with USB interface” was presented to illustrate the advantages and feasibility of this method.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 134-136.  
    Abstract2114)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (3): 137-140.  
    Abstract2411)           
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    Applications of Hyperspectral Remote Sensing(Chinese)
    SHU Jiong;WANG Qiang;SUN Juan
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 1-10.  
    Abstract3091)           
    This paper gave a review and survey of the development of hyperspectral remote sensing technology, the applications of the technolgy in atmospheric environment, features of urban surface and environmental analysis,ocean and inland water environment measurements,vegetation and ecology researches, geologic mine investigations,accidents of environmental hazard. The achievements of Chinese researchers in these areas were also presented. The problems and difficulties in the applications which need further study were pointed out.
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    Design of I2CBus Interface Based on Spartan II XC2S100(Chinese)
    HU Wen-jing;LI Wai-yun;LIU Jing-gao
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 11-15.  
    Abstract2910)           
    The protocol and principle of I2C-Bus were introduced. The framework of I2CBus based on FPGA was proposed. The idea of nesting state-machine of complicated timing-circuit and the hardware description of I2C-Bus interface by Verilog HDL were presented. The simulation of designing under the Xilinx ISE 6.1i development platform combined with ModelSim SE 5.7 was made and the operation on I2C device based on Spartan II XC2S100 was implemented.
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    Effect of Pulsed Electric Field on the Suspension Cultures of Taxus chinensis(Chinese)
    HUANG Lin-ling;YE Hong;CHEN Shu-de;ZHONG Jian-jiang
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 16-22.  
    Abstract2844)           
    Two dimensional gel electrophoresis(2-DE) was used to analyse changes of the protein expression of suspension cultures of Taxus chinensis 48 hours after pulsed electric field (PEF) elicitation. The 2-DE experiments were repeated for 3 times, and proved to be reliable according to the correlation coefficient analysis. Distinct changes were found from comparison of the protein patterns of control and PEF treated cells. Matrixassisted laser desorption/ionization mass spectrometry and electrospray ionization mass spectrometry were used to analyse some proteins. The results indicated that heterogeneous nuclear ribonucleoprotein(hnRNP), aldose l-epimerase family protein and Ferredoxin-NADP(+) reductase, putative/adrenodoxin reductase are related to the induction of PEF.
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    Influence of Cooling Rate on Microstructure of Oxide Scales Formed on Low Carbon Steel Wires(Chinese)
    LIN Fang-ting;SHI Wang-zhou;MA Xue-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 23-28.  
    Abstract2917)           
    Oxide scales were prepared by cooling low-carbon steel wires at different rates and the microstructure was investigated by X-ray diffraction (XRD) and Mossbauer spectroscopy. The distribution of Fe3O4 in the oxide scale was obtained using Magnetic Force Microscope (MFM), through which the influence of the cooling rate on the distribution of Fe3O4 was studied. The results showed that when lowcarbon steel wires are rapidly cooled, the content of Fe2O3 in the oxide scale decreases while the content ratio of FeO to Fe3O4 increases. At the same time, the content of stoichiometric FeO and the defect concentration of Fe3O4 can also change with different cooling rates. The phase composition of the oxide scale and the distribution of Fe3O4 are the main factors that affect the properties of the oxide scale.
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    Development of Carbon Nanotube/Nanofiber Field Emission Display(Chinese)
    GUO Ping-sheng;SUN Zhuo;CHEN Yi-wei;ZHENG Zhi-hao
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 29-33, .  
    Abstract3016)           
    A process was developed for fabrication of diodetype carbon nanotube/nanofiber(CNT/CNF) field emission display (c-FED). The CNT/CNF was prepared by low pressure chemical vapor deposition. The anode and cathode were fabricated by screen printing of phosphor and CNT/CNF paste on glass plates. The vacuum package of the c-FED was fabricated like that of vacuum fluorescent display. The fully sealed c-FED exhibited a good emission property with a turnon field of 1.8 V/μm, and the emission current density of 1 mA/cm2 at 2.9 V/μm,the luminance of 600 cd/m2 for yellow light at on applied field of 2.7 V/μm, and uniform emission luminescence. The process has the advantages of low operating temperature compatible with glass substrates, a scalability in CNT/CNF yield and display size, and has a potential for practical application.
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    Synthesis and Field Emission Properties of Tetrapod like and Wire-like ZnO Nanostructures(Chinese)
    HU Hong-mei;YU Ke;ZHANG Yong-sheng;FENG Xiao;ZHU Jian-zhong;ZHU Zi-qiang
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 34-38.  
    Abstract3046)           
    At 700℃, ZnO nanostructures with tetrapodlike and wire-like morphologies were synthesized using thermal evaporation method. Different source materials were used and the ambient gas was adjusted to study their influences on ZnO products. Field-emission measurements were applied to compare the field-emission characteristics of the two different morphologies of ZnO nanostructures.
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    Direct Detection of DNA Hybridization by Impedance Technique(Chinese)
    XU Ying;YANG Lin;YE Xiao-yan;HE Pin-gang;FANG Yu-zhi
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 39-48.  
    Abstract2747)           
    A label-free DNA hybridization biosensor based on impedance technique was introduced. A 24-mer 5'-mercapto-group ended single-stranded DNA probe (SH-ssDNA) was self-assembled onto Au electrode surface with mercaptoacetic acid (RSH) to form a recognition layer. By Faradic impedance technique, a significant increase of the interfacial electronic transfer resistance Ret was determined when the SH-ssDNA probe/Au electrode hybridized with its complementary sequence. Further, several experimental conditions, including the SH-ssDNA probe immobilization time, hybridization temperature and time, the eletrolyte for impendance detections were optimized. Especially, the proportion of SH-ssDNA and RSH in the immobilization solution was important for a suitable density of ssDNA probe on electrode surface to improve the hybridization efficiency. Based on these optimized conditions, this label-free DNA hybridization biosensor has a low detection limit of 3.0×10-14 mol/L of complementary sequence in solution. When compared with the complementary sequence, the hybridization signal of one-base mismatched sequence and three-base mismatched sequence was 55.6% and 1.3% respectively.
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    Electrochemical Reduction Behavior of p-Nitroanisole on Copper Electrode(Chinese)
    XUE Teng;WANG Huan;LUO Yi-wen;ZHANG Li;LIU Ying-zi;LU Jia-xing
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 49-55.  
    Abstract2901)           
    The electrochemical behavior of p-Nitroanisole on copper electrode in methanol-H2O solution was investigated by cyclic voltammetry and chronocoulometry. The influences of scan rate, concentration and temperature on the electrochemical behavior were discussed. It was showed that the reduction of p-nitroanisole on copper electrode was a diffusion-controlled irreversible process. The diffusion coefficient D of pNitroanisole in methanol-H2O solution was 1.03×10-5cm2/s, while the transfer coefficient was 0.26.
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    SpatialTemporal Change of Land Use in Pudong New Area(Chinese)
    MENG Fei;LIU Min;HOU Li-jun;ZHANG Xin-yin;WU Jian-ping
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 56-63.  
    Abstract3166)           
    Based on GIS and RS methods, the aero-photographs taken during 2000 and 2003 covering Pudong New Area were interpreted, then in both spatial and temporal aspects, the situation of land use change in the area were analyzed. The results showed that in Pudong New Area from 2000 to 2003, the cultivated land and water body area decreased by 4 313 hm2 and 556 hm2, at the ratio of 6.6% and 3.6% per year, respectively. The buildup land expanded with an increase of 4627 hm2, mainly from cultivated land. There are significant difference between towns, land use changes faster in Gaodong, Jinqiao, Zhangjiang and Huamu towns which lie in the urban fringe of Shanghai, and slower in Jichang and Heqing towns that is far from main city zone of Shanghai. The driving forces of LUCC are mainly due to the urbanization, that is, the increase of traffic land use, the rapid development of industrial estate and the rapid growth of population.
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    Numerical Scheme Improvement of the Advection Term in Mass Transport Equation(Chinese)
    CHEN Bing-rui;ZHU Jian-rong
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 64-70.  
    Abstract2868)           
    In a three-dimensional ocean model with curvilinear coordinates horizontally and σ coordinate vertically, the adapted grids at σ layer for interpolation in the Eulerian-Lagrangian Method (ELM) is unreasonable over steep topography, because the vertical distance between the adjacent grids in the same σ layer is too large. So this paper proposed that the interpolation is taken in absolute vertical coordinates to improve ELM. Compared with the original ELM, the numerical experiments show that the improved ELM has lower numerical dissipation, higher accuracy, and better performance over steep topography.
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    Study on Nitrogen Leaching of Paddy Soil in the Field Experiments(Chinese)
    LU Min;LIU Min;MAO Guo-fang;HUANG Ming-wei;QU Fan
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 71-77.  
    Abstract3299)           
    A field case study was conducted to elucidate the dynamic characteristics of N leaching in paddy fields during the ricecropping season. The results showed that, nitrate (NO-3-N) is the dominant species in natural leaching water of paddy soil. High NO-3-N concentration in paddy field and fertilizer application are the main reasons of the heavy N leaching loss at the first few days of immerging. However, the leaching loss amount is weak in later paddy planting because the soil nitrification is inhibited under the condition of immerging. The leaching amount of N is affected by the concentration of N and leaching rate, while the leaching rate is controlled by perviousness of the plough pan and the hydrographic conditions. Under the conditions of an application rate of 250 kg/hm2 and a percolation of 200 mm, the N leaching load of 6.44 kg/hm2 and are 2.58% of total fertilizer application amount are estimated for the singlerice cropping paddy.
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    Three Dimensional Numerical Simulation of Circulation in Dishui Lake in Summer(Chinese)
    CAO Hui-jiang;YANG Yun;ZHU Jian-rong
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 78-83,9.  
    Abstract3302)           
    Dishui Lake is a large man-made freshwater lake at Nanhui Beach in the Changjiang Estuary. The inflows/outflows driven by rivers, the thermohaline circulation, the wind-driven circulation, and the combined circulation in the Dishui Lake in summer driven by the above three dynamic factors were simulated by using improved ECOM model. The inflows/outflows driven by river appear mostly on the line between the inlet and outlet of rivers, generating eddy in the lake. Two cyclonic eddies appear in the thermohaline circulation induced by the heating of surface water in the lake. The east one of the two cyclonic eddies has wider area than the west one, and the speed at the middle and bottom layers is smaller. The surface winddriven currents at the center of the lake mostly meander and northwestward flow. There exist eddies at a side of the strong meander. Due to the mass conservation, the reversed compensation currents appear at the bottom layer. The combined surface currents flow northwestward flow, while the bottom compensation currents flow southeastward. The combined circulation is mainly driven by the wind. The inflows/outflows in the combined circulation appear at the middle and bottom layer due to the against wind.
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    Research on Detection of Urban Vegetation by Object-Oriented Classification(Chinese)
    XIONG Yi-qun;WU Jian-ping
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 84-90.  
    Abstract3297)           
    The method of object-oriented classification for remote sensing images, based on image segmentation which could create objects sets of homogeneous pixels, provides a way to analyze object's features, such as spectral, shape, topology, texture and so on, and to realize the functions of discriminating various species and automatic classification. The traditional way of analyzing and extracting urban vegetation community was taken as a reference, a new classification method has been developed using QuickBird satellite image in Shanghai. With the new method, the total precision is 84.4%, 24.4% higher than conventional supervised classification. The principle of the new approach mentioned may be useful as a new algorithm joined with existing classifiers.
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    Distribution and Accumulation Trends of Catalpol in Resource Species of Rehmannia(Chinese)
    WU Wen;ZHAO Nan;LI Hong-qing;QU Wei-jing
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 91-96.  
    Abstract2849)           
    Highperformance liquid chromatography-UV-mass spectrometry (HPLC-UV-MS) was used to check the distribution and accumulation trends of catalpol in Rehmannia species cultivated in the same place. It reveals for the first time that all the 6 species of Rehmannia contain plenty of catalpol, with R.solanifolia, R. elata and R. piasezkii among the most, close to that of R.glutinosa. And, in root tubers of all the Rehmannia species, mature plants before winter bear most catalpol, compared to that of young seedlings and that of plants in blossom. On the contrary, in stems and leaves, plants in blossom contain most catalpol. Within each species, stems and leaves usually have more catalpol than that of root tubers, enlarged and low lignified root tubers accumulate more catalpol than that of thin and high lignified ones. The mechanism of distribution and accumulation trends of catalpol and expected application of the resource species have been discussed.
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    Intermediate Filament Matrix System of Vegetative Cell and Resting Cyst of Euplotes encysticus(Chinese)
    NI Bing;SUI Shu-guang;GU Fu-kang
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 97-102,.  
    Abstract2949)           
    By the combination of serial selective extraction, with diethylene glycol distearate (DGD) embedment and embedment-free electron microscopy, as well as SDS-PAGE,the intermediate filament (IF) matrix system, which is composed of the filament about 10 nm in diameter and filament band,was observed in vegetative cells and resting cysts of Euplotes encysticus. In vegetative cells,a three dimensions scaffold formed by IF occupies the whole epiplasm with denser filament network beneath the pellicle. The filament of cytoplasm deeps beneath the epiplasm makes up of a looser network attached by organelle and some dense electronic granules. The LA was a laminar structure, which was composed of parallel filaments. The nuclear matrix filament network distributes more intensively and no dense electronic granules attached. The similar more compact network is also seen in the resting cyst, which may be caused by the widely contraction in the course of encystment in infusorians. Remarkably, the filament network is also observed in the innercystwall of resting cyst, and its filament network distributes equably and densely in the whole cyst wall. SDSPAGE shows that only parts of the proteins have preserved when the cyst is formed, part lost, and some distinct proteins have produced.Conclusions: the intermediate filamentlaminanuclear matrix system is a stable structure in both vegetative and resting cyst, and it may play a more important role than the microtubule matrix. Besides the special cingulums in this system of cyst may be the important proteins needed in resting cyst.
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    Changes of Lipid Content and Fatty Acid Composition During Embryonic Development of Macrobrachium rosenbergii(Chinese)
    YAO Jun-jie;ZHAO Yun-long
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 103-109.  
    Abstract3194)           
    The composition of fatty acids and lipid content during embryonic development of fresh prawn Macrobrachium rosenbergii were determined by biochemical methods. The results showed that content of total lipid decreased significantly during development. There was a similar tendency in neutral lipid content, while content of phospholipids nearly remained constant. Higher utilization of total lipid indicated that lipid in embryos of M. rosenbergiiwere used mainly as an energy source. The quantitatively most important fatty acids were the saturates (SFA):C14:0,C16:0,C18:0, the monounsaturates (MUFA): C16:1n-6,C18:1n-9, the polyunsaturates (PUFA)comprise C18:2n-6,C20:4n-6 (ARA) and n-3 high polyunsaturates (ω-HUFA) C18:3n-3,C20:5n-3(EPA) and C22:6n-3(DHA).C18:1n-9 and C16:0 were main energy resources during embryonic development of Macrobrachium rosenbergii. Different fatty acids acted as main energy source during different embryonic stages. The saturates and the monounsaturates were main energy source from fertilized egg stage to gastrula stage. The monounsaturates were main energy source from blastula stage to egg metanauplius stage and so did the polyunsaturates from nauplius stage to zoea stage.
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    Cloning and Expression of rhGLP-1 Multimers in E.coli(Chinese)
    ZUO Yi;HUANG Jing;BIAN Hui-fang;YU Zheng-yan;WU Zi-rong
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 110-114,.  
    Abstract2881)           
    To get a large quantity of human glucagon-like peptide-1, different hGLP-1 multimers containing different copies of rhGLP-1 were constructed. The synthetic hGLP-1 cDNA gene was inserted into pET-32a(+) to get the recombinant plasmid pET32-GLP-1, which could express a fusion protein including thioredoxin, hexahistidine, and rhGLP-1. The coding sequence for the fusion protein was repeatedly inserted into the vector in tandem to get pET32-GLP-1-2 and pET32-GLP-1-3 with two or three copies, respectively. Three different plasmids were transformed into E.coli BLR (DE3) and induced by IPTG. The results demonstrated that the three kinds of E.colicells expressed the desired protein and the percentages of the desired protein increased with the numbers of gene copy. The purified rhGLP-1 showed obvious biological activity of lowering plasma glucose.
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    Effects of Fenvalerate on Cytochrome P450 and the Protein Map of Tn Cells(Chinese)
    LU Ming;FANG Xin-kui;LIU Xiao-da;WANG Zhao-xia;HUANG Dan-feng;ZHOU Pei;QIAO Zhong-dong
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 115-122.  
    Abstract2758)           
    To learn the effects of Fenvalerate on P450s and protein expression in Tn(Trichoplusia ni) cells, the cells were treated with different concentrations of fenvalerate for 12 h to observe the livability of cells by Trypan Blue and MTT assay. P450s Contends were determined by spectroscopic analysis. Protein maps of controlled and treated groups were analyzed by twodimensional liquid phase chromatographic fractionation (PF2D) after treated Tn cells with 12.5 μM fenvalerate for 12 h. Significant differences in characteristic and mortality of cells were found while the concentration of fenvalerate was over 17.5 μM. P450s activity trended to be enhanced with the increase of time or dose of fenvalerate. The activity of P450s reached a maximum at the dose of 12.5 μM and the time of 12 h, and the value of maximum is (8.562±3.46) nmol/mg and (5.28±1.14) nmol/mg protein. 124 differences points were detected between the 2D maps of treated and controlled groups. 42 points were upregulated and 82 were downregulated. Fenvalerate can induce P450s in Tn cells and those proteins changed after treated with fenvalerate might be related to some receptors in the P450s inducing pathway.
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    cDNA Cloning and Sequence Analysis of Human Ring-finger DTX2(Chinese)
    YI Zheng-fang;LI Yong-qing;YUAN Wu-zhou;WANG Yue-qun;ZHU Chuan-bing;LIU Fang;WU Zi-rong;WU Xiu-shan
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 123-126,.  
    Abstract2836)           
    A WWE & RING finger gene, DTX2, located in human chromosome 7q11.23 was identified. Evaluation of fulllength cDNA obtained by RACE showed that it encoded a protein composed of two WWE domains and a RING domain.
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    Influence of Dredging on Suzhou Creek Ecology System(Chinese)
    QI Ren-hai;XU Ya-tong;LIU Yun
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 127-133.  
    Abstract3460)           
    This study investigated the effects of dredging on the water quality, the quantity of plankton and microbe, and the toxicity of sediment. The results were as follows: after dredging, the water quality was improved; the concentration of heavy metal in water held the line; the variety of the microbe quantity was not obvious and might be recovered soon; and the toxicity of sediment was relatively weak, it included that the toxicity of sediment for the luminescent bacteria was depressed; the death rate of animal declined; the rate of liver in avoirdupois declined; and the rate of exceptional mouse sperm declined. It is suggested that dredging in Suzhou creek helped for the recovery of the aquatic ecosystem.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 134-136,.  
    Abstract2291)           
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (4): 137-140.  
    Abstract2334)           
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    Local AT-algebras and Their Properties(English)
    YAO Hong-liang;
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 1-7.  
    Abstract2694)           
    This paper introduced the concept of a local AT-algebra and proved that a C*- algebra is a local AT-algebra if and only if it is an AT-algebra. Properties of AT-algebra conerning their semigroups formed by the equivalence classes of projections were studied.
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    Local AT-algebras and Their Properties(English)
    YAO Hong-liang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 1-7.  
    Abstract1396)           
    This paper introduced the concept of a local AT-algebra and proved that a C*- algebra is a local AT-algebra if and only if it is an AT-algebra. Properties of AT-algebra conerning their semigroups formed by the equivalence classes of projections were studied.
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    Characterization of Non-Linear Isometries
    DENG Li-jin
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 8-12.  
    Abstract1450)           
    This paper studied the characterization of non-linear isometries between infinite dimensional Banach spaces.Under the assumption that the range space is strictly convex, it was proved that f:X-->Y is an isometry <==> it preserves the distance a,b,ma+nb for a,b∈R+, m,n∈N. Thus in some sense the Aleksandrov
    problem was solved.
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    Characterization of Non-Linear Isometries(Chinese)
    DENG Li-jin
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 8-12.  
    Abstract2471)           
    This paper studied the characterization of non-linear isometries between infinite dimensional Banach spaces.Under the assumption that the range space is strictly convex, it was proved that f:X-->Y is an isometry <=> it preserves the distance a,b,ma+nb for a,b∈R+, m,n∈N. Thus in some sense the Aleksandrov
    problem was solved.
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    Reversible Homoclinic and Periodic Orbits Near Heteroclinic Loop
    SUN Ying, ZHU De-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 13-23.  
    Abstract1476)           
    This paper studied the dynamical behavior of a 4-dimensional reversible system near a heteroclinic loop connecting a saddle-focus equilibrium and a saddle one. An existence theorem concerning denumerable 1-homoclinic orbits and countable families of 1-periodic orbits was given under a generic condition; and an intuitionistic description about those orbits was also given.
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    Reversible Homoclinic and Periodic Orbits Near Heteroclinic Loop(English)
    SUN Ying;ZHU De-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 13-23.  
    Abstract2566)           
    This paper studied the dynamical behavior of a 4-dimensional reversible system near a heteroclinic loop connecting a saddle-focus equilibrium and a saddle one. An existence theorem concerning denumerable 1-homoclinic orbits and countable families of 1-periodic orbits was given under a generic condition; and an intuitionistic description about those orbits was also given.
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    Concise Approach for Solving Double Sine-Gordon Equation
    XIE Yuan-xi, TANG Jia-shi
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 24-26.  
    Abstract1598)           
    By introducing an additional ordinary differential equation and the method of variable separation, some explicit and exact solutions to double sine-Gordon equation were found in a concise way.
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    Concise Approach for Solving Double Sine-Gordon Equation(English)
    XIE Yuan-xi;TANG Jia-shi
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 24-26,7.  
    Abstract2600)           
    By introducing an additional ordinary differential equation and the method of variable separation, some explicit and exact solutions to double sine-Gordon equation were found in a concise way.
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    Exact Solutions of Generalized Burgers' Equation with Variable Coefficients
    SHI Yu-ren, WANG Ying-hai, YANG Hong-juan, Lu Ke-pu, DUAN Wen-shan
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 27-33.  
    Abstract1294)           
    This paper found some exact solutions of Burgers' equation with variable coefficients by the hyperbola function method, including solitary wave solutions and periodic solutions. Some of the solutions were derived for the first time. The results showed that this approach is simple and efficient even for solving partial differential equations with variable coefficients.
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    Exact Solutions of Generalized Burgers' Equation with Variable Coefficients(Chinese)
    SHI Yu-ren;WANG Ying-hai;YANG Hong-juan;Lu Ke-pu;DUAN Wen-shan
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 27-33.  
    Abstract2712)           
    This paper found some exact solutions of Burgers' equation with variable coefficients by the hyperbola function method, including solitary wave solutions and periodic solutions. Some of the solutions were derived for the first time. The results showed that this approach is simple and efficient even for solving partial differential equations with variable coefficients.
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    Finite Difference Solutions of a Cooperative Model with Diffusion(English)
    GUAN Qiu-qin;WANG Yuan-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 34-42.  
    Abstract2517)           
    This paper studied the finite difference solutions of a cooperative model with diffusion. A monotone iterative scheme was developed for solving the nonlinear finite difference system. The existence and uniqueness of a nonnegative solution was investigated. It was shown that the system may have four types of
    nonnegative solutions for different parameters, and each of these solutions could be computed by a suitable choice of initial iteration in the monotone iterative scheme. Some numerical results were given.
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    Finite Difference Solutions of a Cooperative Model with Diffusion
    GUAN Qiu-qin, WANG Yuan-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 34-42.  
    Abstract1347)           
    This paper studied the finite difference solutions of a cooperative model with diffusion. A monotone iterative scheme was developed for solving the nonlinear finite difference system. The existence and uniqueness of a nonnegative solution was investigated. It was shown that the system may have four types of
    nonnegative solutions for different parameters, and each of these solutions could be computed by a suitable choice of initial iteration in the monotone iterative scheme. Some numerical results were given.
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    Class of the Nonlinear Two Species Competitive Singularly Perturbed Robin Problems for Reaction Diffusion Systems
    WANG Geng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 43-46.  
    Abstract1448)           
    A class of the nonlinear two species competitive singularly perturbed Robin initial boundary value problems for reaction diffusion systems were considered. Under suitable conditions, using theory of differential inequalities the existence and asymptotic behavior of solution for initial boundary value problems were studied.
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    Class of the Nonlinear Two Species Competitive Singularly Perturbed Robin Problems for Reaction Diffusion Systems (Chinese)
    WANG Geng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 43-46.  
    Abstract3019)           
    A class of the nonlinear two species competitive singularly perturbed Robin initial boundary value problems for reaction diffusion systems were considered. Under suitable conditions, using theory of differential inequalities the existence and asymptotic behavior of solution for initial boundary value problems were studied.
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    Perturbation Identities for the Generalized Polar Decomposition (Chinese)
    SHEN Dong-mei;;WEI Mu-sheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 47-50.  
    Abstract2956)           
    This paper studied the generalized polar decomposition of an m×n(m≧n)complex matrix A ith rank r as A=QH, where Q is a subunitary matrix and H a positive semidefinite matrix. By the method of singular value decomposition, the perturbation identities of Q and H under the unitarily invariant norms were
    obtained.
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    Perturbation Identities for the Generalized Polar Decomposition
    SHEN Dong-mei, WEI Mu-sheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 47-50.  
    Abstract1430)           
    This paper studied the generalized polar decomposition of an m×n(m≧n)complex matrix A ith rank r as A=QH, where Q is a subunitary matrix and H a positive semidefinite matrix. By the method of singular value decomposition, the perturbation identities of Q and H under the unitarily invariant norms were
    obtained.
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    Combined Method for a Class of Partitioned Large Stiff Nonautonomous Systems
    DING Xin-tao, CHEN Guo-liang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 51-58.  
    Abstract1428)           
    The combined Runge-Kutta with Rosenbrock methods are presented for a partitioned systems of stiffly large differential equations. Nonstiff and stiff subsystems are integrated in parallel on two processors by an explicit RK method and a Rosenbrock method respectively. Their construction, convergence and numerical stability are studied, and numerical simulation experiments are conducted on a personal computer and a parallel computer
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    Combined Method for a Class of Partitioned Large Stiff Nonautonomous Systems(Chinese)
    DING Xin-tao;CHEN Guo-liang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 51-58.  
    Abstract2477)           
    The combined Runge-Kutta with Rosenbrock methods are presented for a partitioned systems of stiffly large differential equations. Nonstiff and stiff subsystems are integrated in parallel on two processors by an explicit RK method and a Rosenbrock method respectively. Their construction, convergence and numerical stability are studied, and numerical simulation experiments are
    conducted on a personal computer and a parallel computer
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    On the Spectrums of Frame Multiresolution Analysis(Chinese)
    XIN You-ming;
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 59-65.  
    Abstract2714)           
    Conditions for the spectrum of the central space of an FMRA were given, and a new characterization of the spectrums of the central spaces of FMRAs contained in an MRA was developed. It improved the results of H.O. Kim, et al
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    On the Spectrums of Frame Multiresolution Analysis
    XIN You-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 59-65.  
    Abstract1291)           
    Conditions for the spectrum of the central space of an FMRA were given, and a new characterization of the spectrums of the central spaces of FMRAs contained in an MRA was developed. It improved the results of H.O. Kim, et al
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    Maximum Genus and 1-Factors of Near-Triangulation Graphs
    LU Chang-qing, REN Han
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 66-71.  
    Abstract1460)           
    This paper proved that if the geometric dual G*of a near-triangulation plane graph G contains a set of [1/2φ] independent edges, then the maximum genus γM(G) of G is at least [1/2β(G)]-1 where φ and β(G)$represent the number of faces of plane G and the Betti number of G. In particular, γM(G) = 1/2β(G) if
    φ=0 mod2. As applications, several known results are presented.
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    Maximum Genus and 1-Factors of Near-Triangulation Graphs(Chinese)
    LU Chang-qing;REN Han
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 66-71.  
    Abstract2840)           
    This paper proved that if the geometric dual G*of a near-triangulation plane graph G contains a set of [1/2φ] independent edges, then the maximum genus γM(G) of G is at least [1/2β(G)]-1 where φ and β(G)$represent the number of faces of plane G and the Betti number of G. In particular, γM(G) = 1/2β(G) if
    φ=0 mod2. As applications, several known results are presented.
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    Minimum Cycle Bases of Outplanar Graphs on the Torus
    XU Mei, REN Han, DANG Ying
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 72-75.  
    Abstract1362)           
    This paper investigated the cycle base structures of 2-connected outerplanar graphs on the torus and proved that there is a one-to-one correspondence between the minimal cycle base and two nonhomotopic noncontractible cycles with the shortest total length when $fw(G)≧ 2 and ew(G)>m,m=max{li |1≦i≦f}(l1...lf denote the length of all the non-Hamilton facial walks of G).
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    Minimum Cycle Bases of Outplanar Graphs on the Torus(Chinese)
    XU Mei;;REN Han;DANG Ying
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 72-75.  
    Abstract2958)           
    This paper investigated the cycle base structures of 2-connected outerplanar graphs on the torus and proved that there is a one-to-one correspondence between the minimal cycle base and two nonhomotopic noncontractible cycles with the shortest total length when $fw(G)≧ 2 and ew(G)>m,m=max{li |1≦i≦f}(l1...lf denote the length of all the non-Hamilton facial walks of G).
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    Fill-in Numbers of Some Graphs(Chinese)
    TANG Jie-quan;SHU Jin-long
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 76-82.  
    Abstract2909)           
    By using the decomposition theorem and the local reductive elimination for the fill-in of graphs, the fill-in numbers of some special graphs, such as G1×G2, S(G) and double cyclic graphs were studied. And the following results were obtained: (1)F(Pm×Pn)≦(m-2)(n-2), where m≧2, n≧2; ; (2) if G is a 2-connected graph with m edges and n vertices, then F(S(G))=m+F(G); (3) let G be a double cyclic graph, the length of the two cycles being p and q, respectively, and t the number of the vertices which are both in the two cycles (the end points are excluded), then F(G)=p+q-t-6.
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    Fill-in Numbers of Some Graphs
    TANG Jie-quan, SHU Jin-long
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 76-82.  
    Abstract1448)           
    By using the decomposition theorem and the local reductive elimination for the fill-in of graphs, the fill-in numbers of some special graphs, such as G1×G2, S(G) and double cyclic graphs were studied. And the following results were obtained: (1)F(Pm×Pn)≦(m-2)(n-2), where m≧2, n≧2; ; (2) if G is a 2-connected graph with m edges and n vertices, then F(S(G))=m+F(G); (3) let G be a double cyclic graph, the length of the two cycles being p and q, respectively, and t the number of the vertices which are both in the two cycles (the end points are excluded), then F(G)=p+q-t-6.
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    Maximally Edge-Connectivity of a Transformation Graph G+--
    CHEN Jin-yang, MENG Ji-xiang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 83-85.  
    Abstract1379)           
    This paper proved that for any graph G, its transformation graph G+-- is maximally edge-connected if and only if G has at least two edges and G ~≠ 2K2.
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    Maximally Edge-Connectivity of a Transformation Graph G+--(English)
    CHEN Jin-yang;MENG Ji-xiang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 83-85.  
    Abstract2670)           
    This paper proved that for any graph G, its transformation graph G+-- is maximally edge-connected if and only if G has at least two edges and G ~≠ 2K2.
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    Sequential Mesh Test under Rayleigh Distribution
    PU Xiao-long, YAN Zhang-geng, MAO Shi-song, LI Yan, ZHANG Ying-shan
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 87-92.  
    Abstract1320)           
    This paper discussed the sample inspection problem under Rayleigh distribution. and proposed sequential mesh test. By searching and iterative programs, the design of the new test is not hard to obtain. Examples showed that in comparison with other methods, the new test is more powerful with small sample size.
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    Sequential Mesh Test under Rayleigh Distribution(Chinese)
    PU Xiao-long;YAN Zhang-geng;MAO Shi-song;LI Yan;ZHANG Ying-shan
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 87-92.  
    Abstract2601)           
    This paper discussed the sample inspection problem under Rayleigh distribution. and proposed sequential mesh test. By searching and iterative programs, the design of the new test is not hard to obtain. Examples showed that in comparison with other methods, the new test is more powerful with small sample size.
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    Statistical Analysis for Zero-Failure Data with EM Algorithm
    ZHAO Hai-bing, CHENG Yi-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 93-98.  
    Abstract1593)           
    The paper dealt with Type I censored sample by EM algorithm. Observed failure data were used to estimate unobserved failure data, and the distribution's estimated parameter was obtained. Moreover, a comparison of EM algorithm, maximum likehood estimation and a modified maximum likehood estimation was made. Finally,EM algorithm was used to statistical analysis for zero-failure data, and to estimate the exponential distribution's parameter.
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    Statistical Analysis for Zero-Failure Data with EM Algorithm (Chinese)
    ZHAO Hai-bing;CHENG Yi-ming
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 93-98.  
    Abstract3018)           
    The paper dealt with Type I censored sample by EM algorithm. Observed failure data were used to estimate unobserved failure data, and the distribution's estimated parameter was obtained. Moreover, a comparison of EM algorithm, maximum likehood estimation and a modified maximum likehood estimation was made. Finally,EM algorithm was used to statistical analysis for zero-failure data, and to estimate the exponential distribution's parameter.
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    (Chinese)
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 99-102.  
    Abstract2146)           
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    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 99-102.  
    Abstract1201)           
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    Semantic Model for Web Search Interface
    YANG De-ren, GU Jun-zhong
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 103-109.  
    Abstract1286)           
    The structure of a Web form was analyzed, logically optimized and reorganized; and then a formal description of a Web form was given. Based on a new ontology building method, the semantic model of a Web form was built. The model could be used to identify a form,prepare data and submit query automatically. It also facilitates getting the semantic of query results. At last, the process was explained with an example. The model proved to be practical by experiment, and it is useful for automatically querying dynamic Web contents.
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    Semantic Model for Web Search Interface(Chinese)
    YANG De-ren;GU Jun-zhong
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 103-109.  
    Abstract2796)           
    The structure of a Web form was analyzed, logically optimized and reorganized; and then a formal description of a Web form was given. Based on a new ontology building method, the semantic model of a Web form was built. The model could be used to identify a form,prepare data and submit query automatically. It also facilitates getting the semantic of query results. At last, the process was explained with an example. The model proved to be practical by experiment, and it is useful for automatically querying dynamic Web contents.
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    Standardization and Optimization of the Temporal Label in BCDM(Chinese)
    WANG Lu-bang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 110-115.  
    Abstract2767)           
    This paper dealt with the temporal label in BCDM (the Bitemporal Concept Data Model), transformed the label into a new normal form, then the temporal variables were reduced even eliminated in the process of temporal optimization and temporal binding. The process of the temporal label optimizes the temporal storage and temporal searching.
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    Standardization and Optimization of the Temporal Label in BCDM
    WANG Lu-bang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 110-115.  
    Abstract1565)           
    This paper dealt with the temporal label in BCDM (the Bitemporal Concept Data Model), transformed the label into a new normal form, then the temporal variables were reduced even eliminated in the process of temporal optimization and temporal binding. The process of the temporal label optimizes the temporal storage and temporal searching.
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    Study on Effects of CNTs in PS/CNTs Composites
    SHI Yan, LI Xiang-mei, HE Wei-fan, XU Xue-cheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 116-120.  
    Abstract1533)           
    PS/CNTs were prepared by a simple suspension polymerization method. TEM images showed that CNTs are wrapped in PS particles which are larger than pure PS particles, and it can be proved by DLS tests. TGA showed that the temperature of maximum speed on loss in weight of PS in composites is 80 ℃ higher than that of pure PS. And GPC tests also showed that the molecular weight of PS in composites is much higher than that of pure PS. So the CNTs have joined the polymerization of PS and bonded with PS which lead to an increase in polymerization extent of PS.
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    Study on Effects of CNTs in PS/CNTs Composites(Chinese)
    SHI Yan;LI Xiang-mei;HE Wei-fan;XU Xue-cheng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 116-120.  
    Abstract3010)           
    PS/CNTs were prepared by a simple suspension polymerization method. TEM images showed that CNTs are wrapped in PS particles which are larger than pure PS particles, and it can be proved by DLS tests. TGA showed that the temperature of maximum speed on loss in weight of PS in composites is 80 ℃ higher than that of pure PS. And GPC tests also showed that the molecular weight of PS in composites is much higher than that of pure PS. So the CNTs have joined the polymerization of PS and bonded with PS which lead to an increase in polymerization extent of PS.
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    Improvement on the Model of IR Radiation Fieldof Natural Terrain(Chinese)
    WANG Ying-hua;SHEN Guo-tu;YANG Bao-cheng;CAI Ji-guang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 121-126.  
    Abstract2555)           
    Based on the onedimensional energy equations of the terrain, the IR field model was improved to be able to take various processes of the heat exchange among different parts of terrain into consideration. It was proved that the distribution of the surface soil temperatures obtained by the improved model is suitable in comparison with the experimental value. The IR radiation distribution for the natural terrain was calculated and agreement on the results from the model of distribution function of probability.
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    Improvement on the Model of IR Radiation Field of Natural Terrain
    WANG Ying-hua, SHEN Guo-tu, YANG Bao-cheng, CAI Ji-guang
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 121-126.  
    Abstract1389)           
    Based on the onedimensional energy equations of the terrain, the IR field model was improved to be able to take various processes of the heat exchange among different parts of terrain into consideration. It was proved that the distribution of the surface soil temperatures obtained by the improved model is suitable in comparison with the experimental value. The IR radiation distribution for the natural terrain was calculated and agreement on the results from the model of distribution function of probability.
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    Joint Prevention of Network Intrusion(English)
    WANG Shu-xian;WANG Jing;WANG Neng
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 127-134.  
    Abstract1893)           
    This paper dealt with the intrusion prevention technique from the perspective of joint prevention. It put forward a novel idea about IPS(Intrusion Prevention System) and designed a framework of cooperation between IDS(Intrusion Detection System) and routers using the Intrusion Prevention Protocol (IPP).
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    Statistics and Analysis of Scientific Papers Published by ECNU in SCIE
    ZHENG Wei, RAO Sheng-ping
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 135-140.  
    Abstract1539)           
    This paper analysed the scientific papers published by ECNU in SCIE journals on some aspects, including numbers, subjects, highyield authors,cited times and periodicals. Based on the data, an evaluation was made of the achievement of scientific researches of ECNU.
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    Statistics and Analysis of Scientific Papers Published by ECNU in SCIE(Chinese)
    ZHENG Wei;RAO Sheng-ping
    Journal of East China Normal University(Natural Sc    2006, 2006 (5): 135-140.  
    Abstract2857)           
    This paper analysed the scientific papers published by ECNU in SCIE journals on some aspects, including numbers, subjects, highyield authors,cited times and periodicals. Based on the data, an evaluation was made of the achievement of scientific researches of ECNU.
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    Estuarine and Coastal Erosion: A Review(Chinese)
    SHEN Huan-ting;HU Gang
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 1-8.  
    Abstract2649)           
    This paper gave a review of the state of the art of studies in the past ten years on the coastal erosion processes and mechanisms, patterns and models, and possible counter measures, analysed the progressively deteriorated status of coastal erosion in China, and offered four suggestions on how to further conduct this research: Strengthening the study of estuarine and coastal erosion caused by human being; combining the resarches of tideflat and channel erosions; paying high attention to the study of coastal erosions in the three delta areas in China; and intensifying observations onsite.
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    Review of Reseach on Loess in the Yangtze River Delta and the East China Sea Islands(Chinese)
    ZHENG Xiang-min;LIU Fei
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 9-24.  
    Abstract3169)           
    LoessPaleosol sequences provide a good continental record of paleoclimatic changes. The existence of loess deposits in the Yangtze River delta and islands in the East China Sea indicated that eolian dust deposited on these area since the last glacial period. It has been shown that loess deposits in the Yangtze River delta and islands in the East China Sea are the extension of upper formation of Xiashu loess deposits. Loess in East China, characterized by thin stratum, complex formation and intensively secondary alteration, records the alternation of cold and warm fluctuations since late Pleistocene, as well as the evolution of East Asia monsoon. The curves of particle size and magnetic susceptibility do not change as regularly as that of the loess deposits in West China, and the analysis of clay minerals and chemical components reveal that the intensive leaching process after deposition. Thus we should pay more attention on the local environment, the landform and the intensively alteration after its deposition before any attempts at paleoclimatic reconstruction. It is suggested that multiparameter investigations represent a powerful approach for paleoclimatic reseach into the complex loess deposits record in the Yangtze River delta and the islands in the East China Sea.
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    Numerical Simulation of the Drift and Diffusion of Oil Film at the Crude Oil Wharf in the Bohai Sea(Chinese)
    CHEN Yi-hong;ZHU Jian-rong;CHEN Bing-ui;WU Hui
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 25-33.  
    Abstract3220)           
    Using a 3-D estuarine coastal and ocean numerical model with an oil film drift and diffusion module, the area, thickness and trajectory of the oil film was studied after an oil spill accident happened at the 300 thousand ton crude oil wharf in the Bohai Sea. The results show that in the case of no wind the oil film moves southwestward along with the tidal current, its area increases and thickness decreases, and the port is not polluted during ebb tide; a part of the oil film is blocked by the northern jetty, and stays in the port during flood tide. The oil film trajectory oscillates back and forth with the ebb and flood current, and its thickness decreases and area increases during the drift process with oscillation due to the diffusion. The change of wind speed and direction has a significantly influence on the oil film trajectory and pollution extent in the port.
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    Fractal Method for Correcting the Length of Map Curves(Chinese)
    HAN Xue-pei;FU Xiao-mao;TANG Jing-yan;LIAO Bang-gu
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 34-40.  
    Abstract3149)           
    A fractal method based on GIS was presented. The length of Chinese coastline was measured from different scale maps and corrected with the method. The results show that the fractal method can obviously improve the measurement accuracy from digital maps.
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    Study on the Trajectories of MCS Based on Bayesian Classification(Chinese)
    SU Jun-yi;QIU Jie;GUO Zhong-yang;DAI Xiao-yan
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 41-46.  
    Abstract2926)           
    In this paper, a Boosting Classifier based on Naive Bayesian Classification was built and applied to classify the trajectories of MCS, using a dataset of environmental physical field values around MCS, based on the automated tracking of MCS over the Tibetan Plateau in summer from 1997 to 2000. Furthermore, results comparing several classification methods found the Boosting Bayesian Classifier to be comparable in performance with decision tree and neural network classifiers in the application of prediction of the trajectories of MCS. So it is proven to be an effective method to reveal the trajectories of MCS over the Tibetan Plateau and improve the accuracy of forecasting the disaster weather in Yangtze River Basin.
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    Study on Bambuterol and Its Metabolite in Rat Serum by Capillary Electrophoresis with Amperometric Detection(Chinese)
    ZHOU Tian-shu;SHI Guo-yue;WU Fang;FANG Yu-zhi
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 47-52.  
    Abstract2774)           
    The amperometric detection of bambuterol and its metabolite in rat serum following their separation by capillary electrophoresis is described in this paper. A carbon disk electrode used as working electrode for two analytes exhibited a good response at 1.10 V (vs. Ag/AgCl). The optimal conditions of separation and detection were pH 7.0 phosphate buffer solution (0.02 mol·L-1 ), 10 kV for separation voltage. The peak current versus concentration was linear over the range of 2.0×10-5~5.0×10-7mol·L-1for bambuterol and 2.0×10-6~5.0×10-8mol·L-1for terbutaline. The detection limits for bambuterol and terbutaline were 2.5×10-7mol·L-1and 2.0×10-8mol·L-1respectively. This method was successfully applied to the determination of bambuterol and its active metabolite in rat serum.
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    Effects of Microinjecting Rotenone into SNc on the Behavior and Spontaneous Discharge of Ventrolateral Thalamus in Rats(Chinese)
    ZHANG Bei;HE De-fu;Dong Chun-yang;LU Xiang-yue
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 53-58.  
    Abstract2694)           
    The effects of microinjecting rotenone into SNc on the behavior and spontaneous activities of the ventrolateral thalamus neurons in rats were studied. 28 days after the injection of rotenone, both the latency of rats′ moving on verticalgrid and the numbers of rats′ sliding down the declinedplane significantly increased. The willful movements of animals were significantly decreased, and the time of inactive sitting was significantly increased. The spontaneous discharge rate of the VL neurons significantly decreased. Neurons with type〖KG-*4〗Ⅰbursting fire decreased, however, the regular fire and type〖KG-*4〗Ⅱ bursting fire increased. The peaks of the power spectrum of neurons moved to the low frequency area. The results suggest that microinjecting rotenone into SNc could cause symptoms similar to Parkinsonism syndrome such as rigidity, slow moving, and tremor etc. The results also indicate that it also causes the decrease of spontaneous electroactivities of VL neurons and the changes of their firing patterns.
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    Study on the Indicator System and Fuzzy Aggregative Index Evaluation Model of Enterprises′Environmental Performance(Chinese)
    LIN Feng-chun;CHEN Jing
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 59-66.  
    Abstract3427)           
    A more comprehensive indicator system was established based on international achievements. The indicator system included environmental regulation indicators, environmental management indicators, advancement indicators and Life-cycle environmental impact indicators. Meanwhile, a new evaluation model of Fuzzy Aggregative Index was put forward with respect to the indicator system. Finally, the model was applied to evaluate the environmental performance of one enterprise.
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    Evaluation and Predication of Water Resources Carrying Capacity Based on SD Model: A Case Study of Chongming Island(Chinese)
    CHE Yue;ZHANG Ming-cheng;YANG Kai
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 67-74.  
    Abstract3217)           

    Based on system dynamics model, the water resources carrying capacity of Chongming Island in Shanghai city was discussed. Six scenes of water diversion (local surface water quantity, present water diversion quantity, 10% largest water diversion quantity, 20% largest water diversion quantity, 30% largest water diversion quantity and 50% largest water diversion quantity) as well as four scenes of water resource policies (present water policy, water conservation and recycling policy, industrial structure adjustment policy and integrate policy) were analyzed. The water resources carrying capacity of Chongming Island in different years was simulated, and the population, GDP and COD at different scenes were predicated. Compared with longterm plan of Chongming Island, the water resources carrying capacity indicators were calculated. Finally, the strategy which can promote coordinated development of society, economy and environment was obtained.

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    Evaluation System of Ecologica1 Benefits of Waterscape and Its Appplication in Urban Residential Areas(Chinese)
    LIU Na-na;LI Lin;DA Liang-jun
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 75-83.  
    Abstract4242)           
    Based on the proposed principles, this paper used principal component analysis and nonrepeated twoway analysis of variance to screen the indexes of ecological benefits of waterscape in urban residential areas. Weight of each index at different levels was determined based on analytical hierarchy process decision analysis. Ultimately, a threelevel evaluation system was set up using analytical hierarchy process. We applied this evaluation system to 52 residential areas in Shanghai. The result shows that about 2/3 of waterscapes are categorized into levels 3 to 5, and nonecological artificial waterscape is the key factor that influences the ecological benefits of waterscape in residential areas in Shanghai. At last, we put forward a proposal for ecological restoration and scientific management, i.e., the construction of closetonature waterscape in residential areas. Based on the evaluation approach for ecologica1 benefits of waterscape in urban residential areas evaluation process is simple,useful and highly operable.Additionaly,evaluation results are objective and reasonable.They reflect not only the state of ecologica1 benefits of waterscape,but also the living quality of residents and water environmental management level of residential area.
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    Research of Demonstration Engineering of Landscape Water Eco-compositive Purifying Process in Mengqing Garden(Chinese)
    XU Ya-tong;HE Guo-fu;HUANG Min-sheng;XIE Bing;ZHANG Ming;HE De-fu;LI Xiu-yan;ZHANG Li-quan;LU Kui
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 84-90.  
    Abstract3274)           
    According to the problems that Shanghai faces in the water environment field, an ecocompositive process to treat landscape water was designed and run; this process was made up of water treatment section and water stabilization section. Running the process to treat water from the Suzhou river, the results that gain from continuous running and analysis in one whole year show that the process is able to improve the sight effect distinctly and to reduce the concentration of NH3-N, TN and TP. And the removals of ammonia, total nitrogen and total phosphorus are 70%, 23% and 38% respectively.
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    Environmental and Land Use Factor Affecting Species Diversity within the Degraded Evergreen Broadleaved Forest Communities in East China(Chinese)
    FANG Xiao-feng;WANG Xi-hua;CHEN Wei-juan;YAN Xiao
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 91-97,1.  
    Abstract3260)           
    The evergreen broadleaved forest communities in East China have been subject to extensive disturbances such as changing landuse, agricultural development and logging. To describe the character of species diversity of the degraded evergreen broadleaved forests around Tiantong National Forest Park, their α diversity indices were compared with those of nearby mature evergreen broadleaved forest communities. Multiple stepwise regression was used to determine which factors, such as elevation, aspect, slope, land use type, soil depth, human impact intensity and distance to natural vegetation, road and village, affected the species richness of degraded communities. Overall the α diversity of the evergreen broadleaved forest communities was higher than that of the degraded communities. In the degraded communities, the depth of soil and land use type, together with distance to natural vegetation were the main factors influencing the species richness. We also found a positive correlation between the species diversity of degraded communities and soil depth, but distance to natural vegetation was negatively correlated with diversity, in abandoned orchard the species diversity was higher than that of other land use types. The nine influencing factors can be divided into three groups, which include habitat factors, landscape elements and human disturbance activities. All three groups are important in determining species richness in the degraded communities. However, habitat factors alone play an important role in contributing species richness in shrub communities, while both habitat factors and human disturbance activities are significant in the conifer forests.
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    Floristic Geographical Analysis of Degraded Communities of Evergreen Broad-leaved Forests around Tiantong National Forest Park, Zhejiang Province,China(Chinese)
    CHEN Wei-juan;WANG Xi-hua;YAN En-rong;YAN Xiao
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 98-108,.  
    Abstract3272)           
    The degraded vegetation around Tiantong contains five types of communities, such as earlier degraded community of EBLF, deciduous broadleaved forest community, coniferous and broadleaved mixed forest community, conifer forest community and shrub community. Based on the analysis of floristic compositions, geographical elements and characteristics of the flora, the major characteristics of the flora are as follows: (1) There are 72 families, 138 genus and 204 species in this regional flora of degraded vegetation. Because of the influence of human′s activity, degraded vegetation contain a comparatively lower floristic species richness than that of EBLF community; (2) The floristic characters are conspicuous for temperate and tropicalsubtropical element,which represents a transitional pattern of distribution from subtropical to temperate; (3) Destructions of vegetation lead to the number of endemic to China decreasing; (4) Although five types of degraded communities are different from each other in characteristics of floras, they maintain floristic characteristic and geographic elements of EBLF. These results show that the degraded vegetation around Tiantong has potential ability for nature restoration.
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    Influences of Changes of Environmental Factors on Soil Animal Community in the Succession of the Vegetation in Tiantong(Chinese)
    YI Lan;YOU Wen-Hui
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 109-116.  
    Abstract3107)           
    The change in litter quality is the main factor influencing the soil animal community in the succession of the Evergreen BroadLeaved Forest in Tiantong. The total density of soil animal community in the litter layer is in a remarkably negative correlation with C/N value of litter (r=-0.681, P<0.001), but in a markedly positive correlation with total phosphorus (TP)content(r=0.762, P<0.001). However, the total number of soil animal group in litter has no marked correlation with all nuritent contents. In the soil in depth of 0~15cm, the total density of soil animal community is remarkably positively correlated with organic matter content(r=0.457, P<0.05), total nitrogen (TN) content(r=0.463,P<0.05)and total phosphorus (TP) content(r=0.564, P<0.01). And the total group number is noticeably positively correlated with TP and TN. Furthermore, there are different correlations between density of main soil animal groups and nutrient contents. In the litter, the density of Acarina and Collembola are extremly markedly positively correlated with TN content and TP content of litter. In the soil, that of Acarina does. However, that of Collembola appears negetive correlation with all soil nutrient contents. Hymenoptera in the litter and soil are markedly positively correlated with TP content. The density of Symphyla in the litter and that of Nematoda, Enchytraeidae and Coleoptera in soil have respectively profoundly positive correlations with all litter nutrient contents and soil nutrient contents.
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    Growth and Development of the Clonal Plant Zoysia japonica in Two Environmental Conditions(Chinese)
    LI De-zhi;SHEN Fang-fang;WANG Chang-ai;KE Shi-zhen;WANG Chao-hua;FAN Xu-li;SONG Yun;LI Hong;ZHOU Yan
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 117-124.  
    Abstract3147)           
    The patterns of the growth and development and the characteristics of the environmental responses of Zoysia japonica were studied inside and outside the greenhouse. The results showed that: in the same conditions, the sequences of formation were the multiplenode, root, Ta and Tb on the primary stolons; the rates of formation of the multiplenode and the attached organs on the primary stolons were linear and parallel each other, but the rates inside the greenhouse were usually slower than that outside; the formation of internode was a gradual process; 70% of the internode was elongated after the occurrence of the multiplenode and before the occurrence of the next multiplenode, 30% was elongated after the occurrence of the next multiplenode; in the environment outside the greenhouse, the secondary stolons showed similar characteristics of growth to the primary stolons in terms of the multiplenode and the attached organs, but Tb developed slowly than Ta, which might be related to the different patterns of resource translocation and allocation between the primary and secondary stolons, and among the attached organs; through linearly forward growth of the primary stolons and lateral growth of the suborder stolons, the ramets of Zoysia japonica clones might be placed into wider ecological space, ramet population might be expanded and the resource acquisition ability might be reinforced, which might enhance the ecological adaptation and the competitive ability.
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    Influence of Wheat-Straw-Derived Ash on Diuron Sorption and Biodegradation in Soil(Chinese)
    QIU Yu-ping;CHENG Hai-yan;GONG Bing-li;SHENG Guang-yao;
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 125-130.  
    Abstract3393)           
    Sorption of diuron by wheat straw, its ash arising from burning, ashbased black carbon and ashamended soil was studied. The sorption of diuron on ashfree soil and wheat straw occurred via partitioning behavior with log Koc values of 2.33 and 2.07, respectively. The ash adsorbed 9.7 times more diuron than wheat straw when leaving them unburned in the field. Black carbon was 7~45 times more effective than ash and ashamended soil was 3 times more effective than ashfree soil in sorbing diuron over the range of the experimental concentrations. Aging of the ash for 1 year in the soil did not influence ash sorptivity. The biodegradation of diuron in the soil in the presence and absence of the ash was fitted to firstorder kinetics. The rate constant reduced by 45% and the half life increased by 66% when 0.5% ash was amended to the soil.
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    Preliminary Research of the Migrant Populatiopn of the Black-Faced Spoonbill Platatlea minor in Dongtan Wetland of Chongming Island, Shanghai(Chinese)
    YUAN Xiao;ZHANG Ke-jia
    Journal of East China Normal University(Natural Sc    2006, 2006 (6): 131-136.  
    Abstract3161)           
    From April 2002 to December 2003, the blackfaced spoonbills were investigated in Dongtan Wetland in Chongming Island of Shanghai, China. Results showed that the species were recorded in Dongtan mostly during the northward migrant. They prefer crab ponds as their feeding and resting sites. The blackfaced spoonbill is very rarely in winter. In the spring of 2002, the species stayed in Dongtan at a flock of 45~16 individuals; but in the spring of 2003, each flock was less than 30 individuals and the total amount recorded there is about 130. This showed the Dongtan Wetland has become one of the important overstop areas of blackfaced spoonbills during their migration.
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