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Journal of East China Normal University(Natural Science) 2004 Vol.2004 Please wait a minute... For Selected: Download Citations EndNote Reference Manager ProCite BibTeX RefWorks Toggle Thumbnails Select Adaptive- Control for Linear Stochastic Systems with Unknown Orders and Coefficients YANG Chang-li;RUAN Rong-yao;GONG Miao-kung Journal of East China Normal University(Natural Sc    2004, 2004 (1): 1-14.   Abstract （3131）            Knowledge map    This paper considers single-input single-output linear discrete-time stochastic feed-back control systems(ARMAX model) with unknown orders and coefficients, and propose a new adaptive control algorithm, which is easily implemented on-line. The algorithm can guarantee the global stability of the resulting closed-loop system and the asymptotic optimality of the adaptive tracking. And the estimates of the orders and coefficients are all strongly consistent in the closed-loop identification. Simultaneously, the convergent rate of coefficient estimates to their true values is also given. The simulation results given in this paper show that the new algorithm of the adaptive control we developed here are effective and feasible, besides the control quantities are in the range of the admissible control. Related Articles | Metrics Select Exact Travelling Wave Solutions for R-L-W Equation NIE Xiao-bing;WANG Li-reng Journal of East China Normal University(Natural Sc    2004, 2004 (1): 15-21.   Abstract （3158）            Knowledge map    Stimulated by extended tanh-function method, a double functions method is proposed for constructing exact travelling wave solutions for nonlinear evolution equations. By means of the method, sixteen kinds of exact travelling wave solutions for R-L-W equation are obtained, which contain soliton wave solutions and periodic solutions. The results obtained by Zheng Bin and Zhang Hongqing are extended. With the aid of Mathematica, the method can be carried out partly by computer. Related Articles | Metrics Select On Weighted Least-squares Skew-Hermite Solution of Matrix Equation AXB=E WANG Ming-hui;WEI Mu-sheng Journal of East China Normal University(Natural Sc    2004, 2004 (1): 22-28.   Abstract （3206）            Knowledge map    Using CCD of a matrix pair, this paper obtains the expression of the weighted least-squares Skew-Hermite solution with minimum norm of matrix equation AXB二E and the necessary and sufficient conditions for the existence of its Skew-Hermite solution. Also, in the solution set of matrix equation, the expression of the optimal approximation solution to given matriix is derived. Related Articles | Metrics Select Parallel Genetic Algorithm for Nonlinear Equations LIU Can-wen;LIU Jie Journal of East China Normal University(Natural Sc    2004, 2004 (1): 29-34.   Abstract （3195）            Knowledge map    In this paper the problem on numerical solution of nonliner equations is transformed into that of optimization with linear constraints,and then that solution is found through the genetic algorithm. we also revise genetic algorithm into self-adaptive parallel genetic algorithm to prevent premature convergence. Numerical simulation experiments show our algorithm offers an effective way to solve the nonlinear equations from another viewpoint. Related Articles | Metrics Select Asymptotic Normality of Anti-symmetric K-U Statistic ZHANG Ri-quan;WANG Jing-long Journal of East China Normal University(Natural Sc    2004, 2004 (1): 35-39.   Abstract （2699）            Knowledge map    In this paper, Un= is called the anti-symmetric K-U statistic, where h(x,y)=- h(y,x) is an anti-symmetric function. When k is a constant and k=O(ns) where 0<s<1/2，the asymptotic normality of the anti-symmetric K-U statistic will be established respectively. Related Articles | Metrics Select Comparison of MINQUE and Simple Estimator of Covariance Matrix Abdul-Hussein Saber AL MODEL Journal of East China Normal University(Natural Sc    2004, 2004 (1): 40-44.   Abstract （3139）            Knowledge map    This paper considers comparison of MINQUE and simple estimator of ∑ in the multivariate normal linear model Y~N(XB,∑⊙V) under the risk of squared loss function criterion, where the design matrix X need not have full rank and the dispersion matrix V can be singular. A necessary and sufficient condition is obtained. Related Articles | Metrics Select Longitudinally Driven Magneto-impedance Effect on Glass-covered Fe-based Nanocrystalline Microwires LIU Long-ping;ZHAO Zhen-jie;RUAN Jian-zhong;WANG Rui-li;YANG Xie-long Journal of East China Normal University(Natural Sc    2004, 2004 (1): 45-48.   Abstract （3224）            Knowledge map    Amorphous Fe73.0Cu1.0Nb1.5V2.0Si13.5B9.0 microwires were prepared by glass-coated melt-spinning technique. Nanocrystalline samples were obtained by annealing the amorphous wires at appropriate temperatures and the longitudinally driven giant magneto-impedance effect has also been investigated for the first time. The result showed that the maximal magneto- impedance value was 1020% obtained in the sample annealed at 5700℃. Related Articles | Metrics Select The Study of MEMS Millimeter Wave Phase Shifter GUO Fang-min;ZHU Shou-zheng;WEI Hua-zheng;ZHENG Ying;ZHU Rong-jing;XIN Pei-sheng;ZHU Zi-qiang;LAI Zong-sheng;YANG Gen-qing;LU Wei Journal of East China Normal University(Natural Sc    2004, 2004 (1): 49-55.   Abstract （3134）            Knowledge map    Several designs of MEMS millimeter-wave phase shifters are presented in this paper. They consist of a coplanar wave-guide (CPW) transmission line periodically loaded with 8-32 metal bridges, functioning as capacitive switches. Every switching element consists of a thin metallic membrane actuated by applied bias. Remarkable phase shifter performances were observed. 21Al0.96Si0.04 bridges MEMS Phase shifter reached to 372(/3. 5mm under 20V bias at 35 GHz, the with an insertion lose (S21) of about 4-7 dB. Related Articles | Metrics Select Fe/ PZFE Nanometer Composites by High Energy Ball Milling QIAN Fang-zhen;JIANG Ke-yu;RUAN Jian-zhong Journal of East China Normal University(Natural Sc    2004, 2004 (1): 56-60.   Abstract （10640）            Knowledge map    Fe/PTFE nanometer compound was prepared by high energy ball milling. Firstly, PTFE was milled for 50h,90h,120h ,then Fe/ PTFE mixture was milled for 700h. The components were indentified by 57Fe Mossbauer spectroscopy. The Mossbauer effect studies show that the spectrum includes not only both sextets of bulk and interface of a-Fe ,it indicates the size of particle Fe is in the order of nanometer, but also one singlet for Fe3+, one doublet for Fe2+ , they corresponds to FeF2 and FeF3 respectively. As milling time increases，the component of interface of a-Fe disappears, meantime, the Fe3C appears. The result shows that it is helpful to produce FeF3 as PTFE was initially milled. Related Articles | Metrics Select Studies on Standardization of GIS in Shanghai WANG Feng-xia;ZHANG Chao Journal of East China Normal University(Natural Sc    2004, 2004 (1): 61-66.   Abstract （3082）            Knowledge map    With the flourish development of GIS, more emphases are placed on standardization of GIS. On the basis of discussing the concept of standardization of GIS, the article analyses the study status of standardization of GIS at home and overseas. At last, some proposals of standardization of GIS in Shanghai are put forward. Related Articles | Metrics Select Abstraction the Environmental Physical Field Values of Influencing MCSs Movement GUO Zhong-yang;DAI Xiao-yon;LIN Hui;JIANG Ji-xi;HANG Qian Journal of East China Normal University(Natural Sc    2004, 2004 (1): 67-72.   Abstract （2952）            Knowledge map    The evidences have indicated that rainstorms are usually related with the movement of MCSs, however, the factors of influencing MCSs movement are very complex. In this paper, GMS infrared blackbody temperature over the Tibetan Plateau from June to August 1998 are used to automatically track the movement routes of MCSs. Based on these, spatial data mining method, decision tree, is used to develop the relationships between the movement routes of MCSs and their environmental physical field values, the results indicate that it is feasible to forecast the movement routes of MCSs using decision tree. Related Articles | Metrics Select Effects of Chinese Cobra Cardiotoxin on Pain and Memory LIU Hua-qing;LI Rong-xiu;XIAO Qi-shi;LIU Hao-ran;WENG En-qi;WANG Ting Journal of East China Normal University(Natural Sc    2004, 2004 (1): 73-78.   Abstract （3101）            Knowledge map    To study the analgesic effect and ameliorating effect of cobra cardiotoxin (CTX) on learning and memory impairment induced by scopolamine in mice. The toxicity of CTX was measured in acute toxicity test. The analgesic effect of CTX in mice was measured by hot plate method and acetic aicd writhing test. The ameliorating effect of CTX on learning and memory impairment induced by scopolamine in mice was studied by Y-Maze, Shuttle-box, Step-down and Water Maze methods respectively. LD50 value of CTX was 2.17 mg/kg. CTX ip 0.03 mg/kg, 0. O6mg/kg significantly prolonged the latency time of mice to hot plate stimuli, attenuated the writhing times induced by acetic aicd. CTX ip 0.06 mg/kg, 0.12mg/kg significantly reduced the errors of the mice in Y-Maze test, decreased the mices training times, shorten the escape latency in Shuttle box test. In Step-down test, CTX ip 0.06mg/kg, 0.12mg/kg increased the escape latency and reduced the number of errors, CTX also reduced the searching platform latency and swim path-length in Morris water maze test with mice. All of the effects are dose-dependent. The results above suggested that CTX has an effect of analgesia and is able to improve the learning and memory impairment induced by scopolarnine in mice. Related Articles | Metrics Select Studies on the Morphology and Morphogenesis in Diophrys oligothrix YAO Jun-jie;PANG Yan-bin Journal of East China Normal University(Natural Sc    2004, 2004 (1): 79-87.   Abstract （2828）            Knowledge map    The morphology, morphogenesis of Diophrys oligothrix during the asexual division were studied in detail. Studying on the development of adoral zone of membranelles(AZM) and comparing the AZM of daughters with its parental AZM, we conclude that the AZM of the proter is reorganized. Comparing the morphogenesis of macronuclei and the nuclear apparatus among D. oligothrix, Euplotes and Aspidisca, we can find evolutionary relation among them. After binary division, both the proter and the opisthe of D. oligothrix still recover their ciliary pattern. Related Articles | Metrics Select Analysis on the Contents of Protein and Amino Acids in Cherax quadricarinatus during Different Embryonic Development Stages LUO Wen;ZHOU Zhong-fang;ZHAO Yun-long;YANG Zhi-biao;ZHANG Ming-feng Journal of East China Normal University(Natural Sc    2004, 2004 (1): 88-92.   Abstract （3714）            Knowledge map    The compositions of protein and amino acids were measured and analyzed during the embryonic development of Cherax quadricarinatus. The results indicated that the contents of total protein and total amino acids were all downtrend. The total amino acid contents reduced from 58.05 % (dry weight) at the fertilized egg stage to 47.49% at the prepare-hatching stage. The correlation between the total amino acid and the essential amino acid(except methionine) was prominent, the coefficients of variation were from 8. 25 0o to 13. 34N. In the non-essential amino acid，the contents of glutamine acid and aspartic acid were relatively higher, but the content of cysteine was relatively lower. The results above indicated that protein and amino acid were not only the construction substances of embryonic development, but also the dominating energy sources. Related Articles | Metrics Select Study on the Toxicity of Sediment and Water of Suzhou Creek LIU Yun;HONG Rong;ZHU Wen-jie;TANG Guo-yin;WENG En-qi Journal of East China Normal University(Natural Sc    2004, 2004 (1): 93-98.   Abstract （3702）            Knowledge map    The toxicity of sediment and water of Suzhou Creek was investigated by toxicological methods including acute and sub-acute toxicity test performed on luminescent bacteria, fishes, mice and rats. In luminescent bacteria toxicity test, for the reaches of Zhaotun, Huangdu, Huacao, Beixinjing, Panwanli, Changshou Lu Bridge, Wuning Lu Bridge and Zhejiang Lu Bridge, exposure to the water and the lixivium of sediment inhibited the luminescence, which suggests these samples have toxicity effect on the photobacteria. Furthermore, the toxicity effect is more obvious in urban reaches than in suburb ones, in summer than in winter, in the sediment than in the water. In field test, for the reaches of Changshou Lu Bridge and Zhejiang Lu Bridge, after exposure for 96 hours the livability rate of crucian respectively decreased to 0% and 30%;but for Huangdu reach the livability rates crucian was 83 %. The results suggest urban reaches are evidently unsuitable for cruciads survival. The results of the test on mice suggest the sedimant of Beixinjing reach has acute toxicity to mice. According to the results of sub-acute test on rats the sediment and the water of Beixinjing reach could be harmful to animars liver. On the basis of the above results we draw the conclusion that Suzhou Creek especially its reaches in urban area is unfavorable for biological survival. Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (1): 99-102.   Abstract （2364）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (1): 103-105.   Abstract （2371）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (1): 106-108.   Abstract （2445）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (1): 109-111.   Abstract （2253）            Knowledge map    Related Articles | Metrics Select The Order of A Root of xp-x-1 over Fp SHI Jian-yi;WANG Zhen-hua Journal of East China Normal University(Natural Sc    2004, 2004 (2): 1-4,23.   Abstract （2540）            Knowledge map    The present paper is concerned with the order o(αp) of a root αp of the polynomial xp-x-1 over a prime field Fp. We propose a conjecture that o(αp)=mp:=(pp-1)/(p-1) for any prime p. Then we introduce two methods to verify the conjecture in certain cases. Related Articles | Metrics Select C*-Algebras of Tracial Real Rank Zero YAO Hong-liang;;HU Shan-wen Journal of East China Normal University(Natural Sc    2004, 2004 (2): 5-12.   Abstract （2840）            Knowledge map    In this paper, we introduce a class of C*-algebras which have tracially real rank zero. We show that if A is a unital C*-algebra with tracial real rank zero and B is a AF-algebra, then A×B has tracial real rank zero. If a unital simple C*-algebra has tracially real rank zero, then it has real rank zero. Related Articles | Metrics Select The Modifications of Trees and the Laplacian Spectrum YUAN Xi-ying;;WU Bao-feng;;XIAO En-li Journal of East China Normal University(Natural Sc    2004, 2004 (2): 13-18.   Abstract （2863）            Knowledge map    In the first two parts of this paper, we investigate two kinds of modifications and their relations with the Laplacian spectrum of trees, then give an order of trees which have smaller Laplacian spectra radius. Related Articles | Metrics Select The Energy Growth Property for p-Harmonic Maps LIU Jian-cheng;LIAO Cai-sheng Journal of East China Normal University(Natural Sc    2004, 2004 (2): 19-23.   Abstract （2600）            Knowledge map    In this paper, we study the p-energy growth property for a large class of p-harmonic maps. Using Hessian comparison theorem in Riemannian geometry, we obtain the special estimation of p-energy growth. Related Articles | Metrics Select An Optimal Poincaré Inequality LIU Yong-ming;LI Na Journal of East China Normal University(Natural Sc    2004, 2004 (2): 24-30.   Abstract （3322）            Knowledge map    Poincaré integral inequality plays an inportant role in the nonlinear stability theorem of Arnold. In this paper, a best possible Poincaré integral inequality is obtained, which can be used to get a better estimation of disturbance bound for two-dimensional quasi-geostrophic flow and a better nonlinear stability criterion as well. Related Articles | Metrics Select Comparison of MINQUE and Simple Estimators under Entropy and Symmetry Loss Functions Abdul-Hussein Saber AL-MOUEL Journal of East China Normal University(Natural Sc    2004, 2004 (2): 31-36,5.   Abstract （3225）            Knowledge map    This paper considers comparison of MINQUE and simple estimator of Σ in the multivariate normal linear model Y~N(XB, Σ×V) under the risk of entropy loss function and symmetry loss function criterion, where the design matrix X need not have full rank and the dispersion matrix V can be singular. It is interested to prove that MINQUE is superior to simple estimator under Entropy loss function. Related Articles | Metrics Select The Growth Optimal Portfolio in a General Market Driven by Jump-diffusion Processes XU Zhi-yan Journal of East China Normal University(Natural Sc    2004, 2004 (2): 37-42.   Abstract （6333）            Knowledge map    In this paper, We generalize the results of Yan et al［1］ results on the growth optimal portfolio in a market driven by jump-diffusion processes with multi-risky assets. Sufficient conditions for existence of growth optimal portfolio in this case were given. Related Articles | Metrics Select Analysis and Realization of Bluetooth SDP and Its Improvement XIONG Jiang;GU Jun-zhong;XUE Mei Journal of East China Normal University(Natural Sc    2004, 2004 (2): 43-50.   Abstract （3818）            Knowledge map    Wireless Network which is based on two protocols: IEEE802.11b and Bluetooth solves the problems of wire communication moving inconvenience, lacking in flexibility and use inconvenience. This paper analyzes and researches system architecture, service search engine and realization of SDP which is working in the embedded mobile environment, and suggests some improvement ideas on its shortage which is concluded from the comparison to IEEE802.11b to enhance its security and transfer speed. Related Articles | Metrics Select Research on Application Model and Key Technology of Pervasive Computing JIANG Guo-hua;GU Jun-zhong Journal of East China Normal University(Natural Sc    2004, 2004 (2): 51-57.   Abstract （2549）            Knowledge map    With the development of computer science and communication technologies, Computing patterns are changing. This thesis studies pervasive computing environment and traditional application models. On the research basis, we put forward an appropriate application model according to the characteristics in this new environment. Then we research the key element of the model -service gateway. At last, we adopt this model in the iHome project raised by SVA-IBM joint Lab. It proved its practicability. The proposition of pervasive application model is in the person ’of humanity. It provides a solution to the problems in pervasive computing and is a guide to the continued development of pervasive applications. Related Articles | Metrics Select Bragg Frequency Study of RF Distributed MEMS Phase Shifter QING Jian;SHI Yan-ling;LI Wei;ZHU Zi-qiang;LAI Zong-sheng Journal of East China Normal University(Natural Sc    2004, 2004 (2): 58-63.   Abstract （2763）            Knowledge map    The Bragg frequency, which describes the upper limit frequency of distributed phase shifters, is a very important parameter of RF distributed MEMS phase shifters. This paper discusses in detail the underlying cause and analysis method of Bragg frequency. In addition, by using microwave network theory, the Bragg frequencies of MEMS phase shifters with different dimensions have been calculated. The simulated results demonstrate the Bragg frequency is decreased by increase of the dimension and spacing. The studied phase shifters consist of a CPW line (50 Ω) periodically with MEMS bridges at a spacing of 300 μm. When the widths of the center conductor are chosen to be 50 μm and 100μm, the Bragg frequency are 38.1 GHz and 27.6 GHz, respectively. As the width of the center conductor is fixed at 100 μm, the Bragg frequency reduces form 27.6 GHz to 19.6 GHz with the spacing increasing form 300 μm to 567 μm. Researching the Bragg frequency will benefit the design and optimization of the distributed MEMS phase shifters. Related Articles | Metrics Select Magneto-impedance Effect in BeCu/NiFeB Electroless-deposited Wire WANG Xin-zheng;YUAN Wang-zhi;M Oumarou;RUAN Jian-zhong;GONG Feng-fei;ZHAO Zhen-jie;YANG Xie-long Journal of East China Normal University(Natural Sc    2004, 2004 (2): 64-68.   Abstract （2861）            Knowledge map    NiFeB films were electroless-deposited on 100 μm BeCu wires and were annealed at different temperatures in N2 atmosphere. The dependence of GMI on the annealing temperature and frequencies of driving current was studied. The maximum GMI ratio of 33% of these sample was observed by annealing at 200 ℃. After adding the insulator layer between BeCu and NiFeB layer the GMI ratio of the sample increases to 83%. Related Articles | Metrics Select Study on the Synthesis of 5-FAsA-DBF and Its Chromogenic Reaction with Thorium XU Feng;HAO Zheng-wen;GAO Mei-rong;WU Bing-cai Journal of East China Normal University(Natural Sc    2004, 2004 (2): 69-71,8.   Abstract （2749）            Knowledge map    A new chromogenic reagent 5-FAsA -DBF was synthesized and its colour reaction with thorium was studied， In a perchloric acid medium of 3.84 mol&#8226;L-1， 5-FAsA-DBF reacted with thorium to form a stable coordinate-complex， having its absorption maxima at 630 nm.Its molar absorptivity was found to be 1.63×105 L&#8226;mol-1&#8226;cm-1 .Beer’s law holds in the concentration range of 0～40 μg of Th(Ⅳ) per 25 mL of solution.The method has been apllied to determinate thorium in seafood with satisfactory results. Related Articles | Metrics Select The Basic Character on Process of Runoff and Sediment Discharge at Datong Station of the Changjiang River Ⅰ. Analysis on Runoff Process WANG Pan-cheng;HE Song-lin Journal of East China Normal University(Natural Sc    2004, 2004 (2): 72-80.   Abstract （3343）            Knowledge map    The Changjiang estuary is a typical estuary that fluvial factors plays a dominant role in fluvio-marine interaction. The process and its variation of runoff and sediment discharge have situation under control in respect of evolution of the estuarine environment. This paper studies main characters of runoff process at Datong Station with methods of time-series analysis. It is stated that the runoff series at Datong Station has little change trend since 1923, but a jumped decrease near 1955 and a jumped increase near 1988 have emerged. Meanwhile, it has a certain appearance of periodic variation with around 16,7 years. The distribution patterns of monthly flow, the matching state of high or low water between flood and dry season as well as the relevant causes are also discussed in the paper. Related Articles | Metrics Select The Basic Character on Process of Runoff and Sediment Discharge at Datong Station of the Changjiang River Ⅱ. Analysis on sediment transport process HE Song-lin;WANG Pan-cheng Journal of East China Normal University(Natural Sc    2004, 2004 (2): 81-86,1.   Abstract （3139）            Knowledge map    The Changjiang river is rich in sediment supply which exerts an important influence on development of the Changjiang delta, evolution of shoals and channels in the estuary, realignment and utilization of the estuary. Trend analysis and period analysis on the sediment transport series at Datong Station state that an obvious decrease trend has emerged in the annual series of sediment transport at Datong Station although the sediment discharge at Yichang Station and the annual runoff series at Datong Station have little change trend. The situation is mainly related to shoaling of Dongting Lake, Poyang Lake and other lakes. The sediment-producing region is mostly located in the upper reach and sediment-producing effect of upper, middle and lower reaches is obviously different, so that sediment transporting situation is responded with runoff discharge only about 30% of years in the series. As for monthly distribution of sediment discharge, some 87.7% of suspension loads are discharged through the Datong section from May to Octorber. In addition, the matching status of sediment discharge between flood and dry seasons is preliminarily analyzed in the paper. Related Articles | Metrics Select Observation and Modeling Analysis of Dynamic Mechanism of the Upwelling at Lusi ZHU Jian-rong;QI Ding-man;WU Hui Journal of East China Normal University(Natural Sc    2004, 2004 (2): 87-91,1.   Abstract （2894）            Knowledge map    Based on the analysis of the observation we organized in August of 2000 off the Changjiag mouth,we found for the first time that there exists upwelling phenomenon at Lusi fish ground.The upwelling can bring the colder water and nutrient from the lower layer to the upper layer,and has an important effect on the environment and ecosystem.In order to understand the dynamic mechanism of the upwelling phenomenon,we used a three-dimension high resolution turbulent closure circulation model in spherical coordinates based on the modified ECOM_si model to study this upwelling.The calculated domain includes the East China Sea,Yellow Sea and Bohai Sea,and the real coastline and water depth were considered.In the case of considering all dynamic factors (water volume flux at the open boundaries,density gradient forcing and wind stress),the numerical model reconstructed successfully the upwelling phenomenon which is fairly consistent with the observations.The numerical experiments show that the dynamic mechanism of the upwelling is mainly produced by the baroclinic effect that is induced by the mixing between fresh water from the Changjiang River and the saline water.The wind stress has a little effect on it,and the water volume flux at open boundaries has no effect on it.The combination force of the slop of bottom with the baroclinic effect and wind stress makes the upwelling stronger. Related Articles | Metrics Select Effects of Procyanidins on Preventing Mitochondria Damage in Rat Liver Induced by &#8226;OH CHEN Ji-wu;ZHU Zhen-qin;SU Yu;WANG Ni;CAO Jia-qi;LIU Guo-wei;HU Bing;ZHAI Wan-yin Journal of East China Normal University(Natural Sc    2004, 2004 (2): 92-96.   Abstract （3306）            Knowledge map    Oxidative damage of the mitochondria plays an important role in generating and developing process of many diseases.Hydroxyl radical (&#8226;OH) has been considered an important factor inducing mitochondria damage.Therefore,it has important significance to study and exploit medicines protecting mitochondria damage caused by &#8226;OH.We measured effects of procyanidins preventing mitochondria damage induced by&#8226;OH using spectrophotometry and fluorescent polarimetry.The results showed that procyanidins increased effectively membrane lipids fluidity of damaged mitochondria,decreased significantly the mitochondria swelling and lipid peroxidation product formation.As a result,procyanidins can maintain the integrity of structure and function of mitochondria.Above results can provide new data for further exploitation of procyanidins. Related Articles | Metrics Select The Definition and Types of Urban Ecological Sensitive Area with the Case Study in Pudong New Area,Shanghai,China DA Liang-jun;LI Li-na;LI Wan-lian;CHEN Ming Journal of East China Normal University(Natural Sc    2004, 2004 (2): 97-103.   Abstract （3521）            Knowledge map    This paper discusses different points of view about the concept of ecological sensitive area and proposes that the green field should be included in the conception of urban sensitive areas to prevent the irregular expand of urban.Based on this conception,the ecological sensitive areas are classified into five types namely ①nature-protection type,②environment-improvement type,③field-control type,④pollution-effect type and ⑤resource-reserve type.As a case study,the types of eological sensitive area in Pudong New Area were classified and the suggestions on the consrtuction of ecological sensitive area were put forward. Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (2): 104-106.   Abstract （2286）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (2): 107-109.   Abstract （2334）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (2): 110-112.   Abstract （2158）            Knowledge map    Related Articles | Metrics Select Existence and Uniqueness of Limit Cycle for A Nonlinear Equation LIU Xing-bo Journal of East China Normal University(Natural Sc    2004, 2004 (3): 1-5，28.   Abstract （3416）            Knowledge map    This paper considers the existence and uniqueness of limit cycle for a planar autonomous system x=Q(x,y), y=P(x). The conditions of existence of limit cycle in papers ［7~9］ are simplified, in addition, The uniqueness of limit cycle is discussed. Simpler conditions for the existence and uniqueness of limit cycle are obtained. Related Articles | Metrics Select Normal Families Concerning Differential Polynomial WANG Xiao-jing;;PANG Xue-cheng Journal of East China Normal University(Natural Sc    2004, 2004 (3): 6-10.   Abstract （2787）            Knowledge map    In this paper a general normal criterion is obtained, which improves the results given by Gu YX［1］ and Zhu JH［2］. Let F be a family of meromorphic functions on domain D, all of whose zeros are of multiplicity at least m+3. Let h≠0, a0, a1, …, am-1 be holomorphic functions on D. If for any f∈F, L(f)(z)=f(m)(z)+am-1(z)f(m-1)(z)+…+a1(z)f′(z)+a0(z)f(z)≠h(z), z∈D, then F is normal on D. Related Articles | Metrics Select A Variational Proof of the Firey 2-sum Christoffel Problem HU Chang-qing;WANG Pei-he;SHEN Chun-li Journal of East China Normal University(Natural Sc    2004, 2004 (3): 11-15.   Abstract （2614）            Knowledge map    In this paper, we take a direct method in calculus of variation to discuss some linear equation on Sn and get the existence and the uniqueness of its positive solution, by this method we give a proof for the Firey 2-sum Christoffel problem. Related Articles | Metrics Select Reverse Order Laws for Generalized Inverses of Matrices on An Arbitrary Skew Field LIU Yong-hui;GONG Zi-kun;WEI Mu-sheng Journal of East China Normal University(Natural Sc    2004, 2004 (3): 16-21.   Abstract （2978）            Knowledge map    In this paper, we prove a decomposition theorem of matrix pair over an arbitrary skew field. By applying the decomposition theorem, we obtain some neccessary and sufficient conditions of reverse order laws for g-inverse and reflexive g-inverse of matrix products on an arbitrary skew field. Related Articles | Metrics Select On the Spectral Radii of Trees WU Bao-feng;YUAN Xi-ying;XIAO En-li Journal of East China Normal University(Natural Sc    2004, 2004 (3): 22-28.   Abstract （3584）            Knowledge map    We focus on the ordering of trees on n vertices and determine seven trees with small spectral radii. We also consider the following problem: of all trees with maximal degree 3 on n vertices which achieves the minimal and maximal spectral radius when the vertices number of degree 3 is one, two and three, respectively? Related Articles | Metrics Select Inertial Fractal Set for Complex Ginzburg-Landau Equation in Three-dimension LI Dong-long;GUO Bo-ling Journal of East China Normal University(Natural Sc    2004, 2004 (3): 29-35.   Abstract （2774）            Knowledge map    This paper considers the complex Ginzburg-Landau equation in three spatial dimensions. The Lipschitz continuity and the squeezing property of the semigroup S(t) associated with the initial-value problem of complex Ginzburg-Landau equation are proved. Therefore the existence of inertial fractal sets is obtained. Related Articles | Metrics Select The Waiting Time Problems of Patterns HAN Qing Journal of East China Normal University(Natural Sc    2004, 2004 (3): 36-41,9.   Abstract （2622）            Knowledge map    This paper considers the waiting time problems of pattern S0 and S1 in a Markov dependent sequence. The probability functions and the probability generating functions of the sooner and later waiting time between pattern S0 and pattern S1 are obtained. Also obtained are the probability functions and the probability generating functions of the waiting times of patterns S0 and S1. Related Articles | Metrics Select Comparison of Two Bayesian Models PU Xiao-long;XU Jing Journal of East China Normal University(Natural Sc    2004, 2004 (3): 42-47,1.   Abstract （2889）            Knowledge map    This article discusses the difference between two Bayesian models. With model 1, it is assumed that xi（i=1,2）is conditional independent under θi（i=1,2）. While with model 2, it is assumed that xi（i=1,2）is unconditional independent. The question is that when working for the Bayesian estimation of θ1, is there any difference on the results under the two different models? The numerical comparison shows that there is only small difference between the results. So the simpler model 2 can replace the model 1, when Bayesian estimation of θ1 is calculated. Related Articles | Metrics Select Stochastic Orders of Exponential Family GONG Hai-lin;ZHANG Xin-sheng Journal of East China Normal University(Natural Sc    2004, 2004 (3): 48-53.   Abstract （2622）            Knowledge map    This paper investigates the likelihood ratio order and the increasing convex (concave) order for exponential family of distributions. Some sufficient conditions to these orders are obatined. Related Articles | Metrics Select Skew Detection for Form Document Using Vertex-chain-code ZHANG Sheng-xi;ZHANG Wei;LI Guo-qiang;GU Guo-qing Journal of East China Normal University(Natural Sc    2004, 2004 (3): 54-58.   Abstract （2885）            Knowledge map    In view of the fact that frame lines and hanging lines of a form image have the longest boundary and the boundary-labeling-automaton gives Vertex-Chain-Code of region boundaries easily, this paper proposes a new method for skew detection for a form image. The algorithm is efficient and robust against strong noise. Related Articles | Metrics Select A Theoretical Model of Gap Junction Intercellular Communication and Its Electric Magnetic Field Suppression QI Hong-xing;CHEN Shu-de;QIAO Deng-jiang Journal of East China Normal University(Natural Sc    2004, 2004 (3): 59-65.   Abstract （2870）            Knowledge map    We establish a theoretical model of gap junctional intercellular communication (GJIC) and its suppression effect by electric-magnetic fields. The model is based on the self-organized critical states of cells and gap junction, and we also discuss the information sink, information lock, information channel, which play essential rules in communicative function of the cell membrane and the EM effect. The result can be used to explain the experiment data and the suppression of GJIC by 50 Hz magnetic field. Related Articles | Metrics Select The Timing Problem of Synchronous Design in FPGA/CPLD LEI Jian-hong;JING Zhi-cheng;SHEN Jian-guo Journal of East China Normal University(Natural Sc    2004, 2004 (3): 66-70,9.   Abstract （2806）            Knowledge map    This paper discusses the timing problem in FPGA/CPLD design. It digs out the reasons of this kind of problem and the influence of them on design. Finally, it concludes with some resolutions for the timing design. Related Articles | Metrics Select A New Static-electronic Driving Variable Optical Attenuator YANG Zhen;LI Guo-dong;PENG De-yan;XIN Pei-sheng;LAI Zhong-sheng;ZHU Zi-qiang Journal of East China Normal University(Natural Sc    2004, 2004 (3): 71-75.   Abstract （2768）            Knowledge map    Optical attenuator is a key component in a fiber network. This paper reports a new kind of Silicon-based Variable Optical Attenuator(VOA) based on Micro-Opto-Electro-Mechanical System(MOEMS) technique. The device is designed to work on the wavelength range of 1 320 nm to 1 550 nm. Related Articles | Metrics Select ESR Study on the Photoinduced Production of Hydroxyl Radicals by Nano-TiO2 AI Shi-yun;YANG Ya;XIAN Yue-zhong;LI Jia-qing;LI Luo-ping;JIN Li-tong Journal of East China Normal University(Natural Sc    2004, 2004 (3): 76-81.   Abstract （3427）            Knowledge map    In nano TiO2 photocatalytic oxidation system, adding inorganic oxidizing species can efficiently trap photogenerated electrons and increase concentrations of hydroxyl radicals in the solution and enhance the photocatalytic oxidation rate of nano TiO2 to different organic matter. In this study, correlation of the production of hydroxyl radicals and the photoinduced electron tranfer of nano-TiO2 by inorganic oxidizing species (K2S2O8) was verified by means of the free radicals measured by spin trapping-ESR methods in which DMPO was selected as the spin-trap. The photocatalytic oxidation mechanism of glycine was studied. Related Articles | Metrics Select A Proposal to Build Meimaosha Reservoir as A New Water Resource for Shanghai CHEN Ji-yu;CAO Yong;LIU Jie;CHEN Shen-liang Journal of East China Normal University(Natural Sc    2004, 2004 (3): 82-86.   Abstract （3087）            Knowledge map    There is a rapid increase in utlilzing the fresh water resources with the development of Shanghai . According to the monitoring data in the first four months of 2003 near Pudong International Airport Dock, the authors think it is appropriate to build the Meimaosa reservoir between the Meimaosa sand ridge and Nanhui bank. The reservoir has huge capacity of about 200 million m3 and can fully utilize and store seasonal and discontinuous water resources. The water environment of Pudong will be greatly improved and its water demand can be satisfied. The advantages and disadvantages to build the reservoir, the multifunctional development of the reservoir and the work in advance needed to do are analyzed in this paper. Related Articles | Metrics Select A Fractal Theory of the Urban System in Yangtze Delta LING Yi-ying;XU Jian-hua;YUE Wen-ze;Ai Bin Journal of East China Normal University(Natural Sc    2004, 2004 (3): 87-92.   Abstract （3207）            Knowledge map    This paper studies the Urban system in Yantze delta using fractal theory. We figures out the primate city index in Yantze delta according to the town primacy rule of M.Jefferson, and then the town-size fractal dimension is worked out to discuss to the scale structure of the urban system in Yantze delta. In addition, spatial correlation dimension of the town-size distribution in Yantze delta is put forward to analyses the spatial structure of urban system. According to all these analyses it points out there are some deficiencies of the urban system in Yangtze delta, such as:(1)The scale distributing in Yangtze delta is primacy distributing; (2) Middle-small cities develop much slower than big cities; (3) The capacity of spatial interaction isn’t strong enough. The paper puts forward the direction for developing the urban system in Yangtze delta: Realize the integration of regional economy, and speed up the development in Yangtzi delta. Related Articles | Metrics Select The lmpact of Glutaraldehyde as Fixative on Marine Picophytoplankton ZHANG Li-hua;CHAO Min Journal of East China Normal University(Natural Sc    2004, 2004 (3): 93-98.   Abstract （3528）            Knowledge map    Samples are fixed with 1% glutaraldehyde and stored in liquid Nitrogen .Cell density、size and intensity of autofluorescence are compared with fresh samples in this experiment . The results showed that cell density and cell size of all three picophytoplanktonic populations(prochlorococcus、 synechococcus and picoeukaryotes) increased, but intensity of autofluorescence decreased. Related Articles | Metrics Select A Study on SDSS-based Shanghai Flood Control Decision Support ZHENG Xiao-yang;YU Li-zhong;YANG Meng Journal of East China Normal University(Natural Sc    2004, 2004 (3): 99-104.   Abstract （3381）            Knowledge map    With rapid modernization of big cities, increasingly more problems have been found in urban flood control management and decision-making. Thus it is necessary to introduce SDSS theory and technology in order to optimize decision-making process. Based on characteristics of Shanghai flood control, and integrated with hydrology, meteorology, geomorphology, Geographic Information System, model database and knowledge database, a flood control SDSS was designed for the purpose of real-time monitoring and forecasting. Depending on the system, flood control departments can make scientific and reasonable decisions, and realize the objective of bringing flood control into modern administration. Related Articles | Metrics Select Analysis of Microclimate Effects around River and Waterbody in Shanghai Urban District YANG Kai; TANG Min; LIU Yuan;WU E-nuo;FAN Qun-jie Journal of East China Normal University(Natural Sc    2004, 2004 (3): 105-114.   Abstract （4290）            Knowledge map    The air temperature (T) and relative humidity (RH) are observed for six different types of rivers and water bodies in Shanghai urban district. By comparing temperature-humidity features and human comfort degrees between the windward and leeward shores of these selected water bodies in different seasons, this paper attempts to analyze microclimate effects of urban river and waterbody effects. The results obtained are as follows: (1) The size of water area contributes greatly to microclimate effects. In observing period for several seasons, the T in the lake leeward decreased by 1～3 ℃ and the RH increased by 6％～14％ compared to that in windward shore in Changfeng Park. (2) Building layout around waterbody affects the microclimate in some degree. Dense high buildings in Zhongyuan residential district transform the state of airflow, so a microclimate effect is formed near Suzhou brook. (3) Compound ecosystem composed by water and greenbelt can do well work for a microclimate effect. On condition of open green space near Zhangjiabang brook, the T in leeward shore is lower by 1.5～2 ℃ and the RH is higher by 4～8％ than that in windward shore during observing periods. (4) The artificial facilities such as fountain, can improve the waterbody microclimate effect. Near artificial lake of Taipingqiao greenbelt, the difference of T and RH enlarged respectively by 0.3 ℃ and 4％ when the fountain was working than it closed in the observing day. (5) The effect of human comfort degree displays more significant in warm spring-summer than it in cold and dry winter. Related Articles | Metrics Select On Several Issues of East-Asiatic Bryophytic Immigration Route by the Characteristics of the Bryoflora of Eastern Jiufeng Mt.,Fujian,China ZHU Jun;WANG You-fang Journal of East China Normal University(Natural Sc    2004, 2004 (3): 115-120.   Abstract （3121）            Knowledge map    Based on the comparison and analysis of the principal geograpghical elements and East-Asiatic endemic genera in the bryofloras of Eastern Jiufeng Mt.and its adjacent regions,as well as the relationships with the bryofloras of Taiwan(China)and Japan,the conclusions are as follows:the bryoflora of Jiufeng MT.belongs to a transitional area; the bryophytic immigration route of Himalaya-Northern Guangxi-the Wuyi Mountains -Taiwan;the area including the eastern Jiufeng Mountain and the adjacent is worthy to be further explored for its bryophytes,because of the richness of the East-Asiatic endemic genera,the high degree of the species abundance,numerous new records for China of Fujian,and the presence of epiphyllous liverworts. Related Articles | Metrics Select Protective Effects of Lycium Bararum Polysaccharides on Carbon Tetrachloride and High Glucose Damaged Hepatocytes ZHANG Hong-feng; XU Man-yan; WANG Yao-fa Journal of East China Normal University(Natural Sc    2004, 2004 (3): 121-125,.   Abstract （2787）            Knowledge map    Hepatocytes in vitro damaged by carbon tetrachloride (CCL4) and high glucose(HG) were used to research the mechanism of CCL4 and HG on the glucokinase(GK) activity,the intercellular Ca2+ concentration and the level of tyrosine phosphorylation in cells ,and then the protective effects of Lycium bararum polysaccharides(LBP).The results showed that CCL4 and HG inhibited the GK activity,elevated Caconcentration and decreased the level of tyrosine phosphorylation in hepatocytes. LBP could improve the change of the GK activity and Ca2+ concentration induced by CCL4 and HG, and the decrease of tyrosikinase activity in the pathway of insulin induced by CCL4 only.But LBP couldn’t improve the decrease of tyrosikinase activity induced by HG.The conclusion was that LBP could protect hepatocytes against free radicals directly,but not against the damage of HG. This related to the different mechanism of CCL4 and HG. Related Articles | Metrics Select The Characteristics of the Acoustic Response of AⅠNeurons to the Frequency of Pure Tone HE De-fu;CHEN Fu-jun;ZHOU Shao-ci Journal of East China Normal University(Natural Sc    2004, 2004 (3): 126-130.   Abstract （2995）            Knowledge map    The characteristics of the acoustic response of AⅠneurons to the frequency of pure tone were investigated with extracellularly recording. The experimental results showed that the tuning curves of AⅠneurons could be classified into “V”, “W”, and “U” types. Q10 values and Q30 values of AⅠneurons increased with increasing of the characteristic frequencies (CFs) of these neurons. The results also showed the topographical distribution of the CFs of neurons in AⅠcortex. Generally the neurons with high CFs laid in the rostral part of AⅠ, and the neurons with low CFs laid in its caudal part. These results indicated that AⅠneurons with high CFs had more powerful frequency selectivity ability than that with low CFs, and that the frequency range of acoustic response of AⅠneurons widened with increasing of CFs of these neurons. The topographical distribution of the CFs in AⅠindicated that the coding on frequency of sound stimulation accorded with the rule of place coding. Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (3): 131-134.   Abstract （2237）            Knowledge map    Related Articles | Metrics Select Webbing the LMDS Remote Terminal(NOTE) PEI Jin-ming;SUN Hu;ZHU Shou-zheng Journal of East China Normal University(Natural Sc    2004, 2004 (3): 135-137.   Abstract （2345）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (3): 138-141.   Abstract （2343）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (3): 142-144.   Abstract （2176）            Knowledge map    Related Articles | Metrics Select Fusion Problem of Weak Solutions for A Class of Quasilinear Elliptic Equations Chen Hui-yu;Ran Qi-kang Journal of East China Normal University(Natural Sc    2004, 2004 (4): 1-5.   Abstract （2741）            Knowledge map    In this paper ,using geometric theory and special test function method, a sufficient condition for the solution of the fusion problem of weak solutions for a class of two order nonhomogeneous quasilinear el-liptic equations is obtained一div A(x,▽u)=B(x,u,Du). Related Articles | Metrics Select Extensions of Cuntz Algebras LIU Shu-dong;LIU Jun-ping Journal of East China Normal University(Natural Sc    2004, 2004 (4): 6-9.   Abstract （2827）            Knowledge map    It is well-known that Extw (○n) ≌Zn-1. In this paper, we construct all the extensions of ○n by K in a new way, and compute their K-groups. Related Articles | Metrics Select Equivalent Theorems for Various Uniform Stabilities of Discrete-time Nonlinear Systems WANG Zhi-ming;ZHENG Yu-fan;DAI Hao-hui Journal of East China Normal University(Natural Sc    2004, 2004 (4): 10-15.   Abstract （2682）            Knowledge map    Equivalent theorems in terms of class K functions are presented for uniform stability and uniform asymptotic stability of discrete-time nonlinear systems. On the base of the equivalent theorems, the theorem of uniform asymptotic stability for the discrete-time nonlinear systems and its comverse theorem are also obtained. Related Articles | Metrics Select A Finite Difference Scheme for Nonlinear Reaction-diffusion Equations with Time Delay ZHANG Li-fang;WANG Yuan-ming Journal of East China Normal University(Natural Sc    2004, 2004 (4): 16-23.   Abstract （3200）            Knowledge map    A finite difference scheme with the accuracy of fourth order in space and second order in time is proposed for solving a nonlinear reaction-diffusion equation with time delay. Existence and uniqueness of the solution is given by the method of upper and lower solutions. A monotone iteration is also developed for the computation of the finite difference solution. The convergence of the scheme is discussed. The numerical results shows the advantages of the method. Related Articles | Metrics Select Estimators of Parameters in A Single Index Time Series Model ZHANG Ri-quan; Journal of East China Normal University(Natural Sc    2004, 2004 (4): 24-27.   Abstract （2817）            Knowledge map    This paper gives a solution to the problem of estimating coeffcients of index model in a time series. The kernel estimate method and the average derivative method are employed. Under the data being β-mixing depentent,the asymptotic normality of the estimator are established. Related Articles | Metrics Select Upper Bounds on the Spectral Radius of Digraphs FANG Kun-fu;SHU Jin-long Journal of East China Normal University(Natural Sc    2004, 2004 (4): 28-32.   Abstract （3164）            Knowledge map    In this paper, using the matrix theory, we present a sharp upper bound on the spectral radius of digraphs in terms of the out-degree sequence. Meanwhile, we characterize the extremal digraphs which spectral radius reaches the upper bound. Related Articles | Metrics Select Bayesian Spline Nonparametric Regression LU Yi-qiang;MAO Shi-song Journal of East China Normal University(Natural Sc    2004, 2004 (4): 33-39,9.   Abstract （3187）            Knowledge map    In this paper the nonparametric regression model y= f(x)+ε, where f (x) is a smoothing function, is considered. The nonparametric regression f (x) is approximated by a spline function. The knot number is not fixed but given a noninformation prior, by which the uncertainty of the knot number is studied. The regression f(x) is estimated by the method of Bayesian model averaging and the posterior interval is also estimated. Related Articles | Metrics Select Design and Development of A Microwave Cardio Graph Meter HUNG Yong;AN Tong-yi;QIAN Jian;FAN Ming-jie Journal of East China Normal University(Natural Sc    2004, 2004 (4): 40-47.   Abstract （2670）            Knowledge map    A design of Microwave Cardio Graph Meter (MCG)，by which human signal can be extracted is proposed in this paper. Features: 1 150 MHz continuous ca rrter wave; Cancellation of un-modulated carrier wave by Zero-balance technique; Using forward scattering wave to improve performance. Experiments show that: the apparatus is simple in structure, and works steadily with high sensitivity and low noise. The MCG graphs are presented and discussed in detail. Related Articles | Metrics Select The Design of the GPRS Mobile Telephone System on Wireless Module XU Min;LIU Jin-gao Journal of East China Normal University(Natural Sc    2004, 2004 (4): 48-51.   Abstract （2677）            Knowledge map    This article introduces the GPRS mobile telephone designing method based on wireless module and MCU. On the basis of a brief description of the national actuality concerning the GRPR mobile telephone R&D, the author gives the system’s schematic. This article also presents hardware and software design of the system, which provides some hints for the R&D engineer on the GPRS mobile telephone designing. Related Articles | Metrics Select The Design of SMS based on PDA and Wireless Module Tong Xiao-hui;Gu Zeng-hui;Liu Jin-gao Journal of East China Normal University(Natural Sc    2004, 2004 (4): 52-55.   Abstract （2836）            Knowledge map    This article introduces the serial communication based on Windows CE. With a wireless module, PDA send SMS to the especial service center. The content of SMS include the GPS information and the service information that the user requires. The service center returns the information that is required by the user in the form of SMS. This article emphasizes the design and programming of SMS. Related Articles | Metrics Select The Pulsed Electric Field Effect on the Cell Signal Pathway Mediated by Insulin DAI Yu-wen;DING Li-ping;LI Le-jun;ZHANG Hong-feng;XIA Ruo-hong;CHEN Shu-de Journal of East China Normal University(Natural Sc    2004, 2004 (4): 56-63.   Abstract （2940）            Knowledge map    Insulin was exposed to the pulsed electric field (PEF) for 0 min or 20 min before being added to the culture medium containing L-02 human hepatocytes. Thirty minutes later, the tyrosine phosphorylation level of the cells for each group was monitored by a flow cytometry. The average fluorescent intensity of the test cell groups decreased by 10.33% compared with the control groups. After the cells were cultured in the medium with the exposed insulin or the normal insulin for 68 hours, the gene expression levels were measured by using a gene expression chip. The change of fifty-five out of 12,000 gene sequences of the test groups were obvious compared to the controls. The human tyrosine phophatase mRNA showed increases in their expressions. These results suggested that, the intercellular signal molecule such as insulin can be the target of the electromagnetic field, and acts as a signal carrier of the information of PEF, which consequently causes its biological effects. Related Articles | Metrics Select A Study on the Pattern of Land-use in Arid Area of Northwest China with RS and GIS------A Case of Wuwei City in Gansu Province YUE Wen-ze;XU Jian-hua;XU Li-hua Journal of East China Normal University(Natural Sc    2004, 2004 (4): 64-71.   Abstract （3554）            Knowledge map    Based on RS&GIS technique and quantitative analysis method and fractal model. We can reveal the main characters and dynamic process of the pattern of land-use in arid area. Our conclusions are as followings: (1) In Wuwei city the types of land-use were simplex, the density of land-use patches was small. (2) From 1995 to 2000 the diversity of the pattern of land-use had a little increase, while the dominance decreased comparatively. The fragmentation difference of all kinds of land-use was big. (3) In the terms of the simulative result with fractal model, the nature land-use influenced lower by humankind have more complexity than man-power land-use, the stability is reverse, The residential area and independent mine industry, water area were the most stable and simple land-use, while the farmland and grassland were the most complicated and unstable land-use. In the timescale the complexities of almost all land-uses in the pattern of land-use were increased while the stabilities were depressed. (4) The main factors that effect and control the pattern of land-use were complicated, there were three main factors region background, nature conditions and human activities. We should adopt reasonable measures to prevent the process. Related Articles | Metrics Select Impact of the Estuarine Funnel Shape on the Formation of Turbidity Maxima FU De-jian;ZHU Jian-rong;SHEN Huan-ting Journal of East China Normal University(Natural Sc    2004, 2004 (4): 72-78.   Abstract （3896）            Knowledge map    Using the improved ECOM model and suspended sediment transportation model, the impact of the estuarine funnel shape on the estuarine turbidity maximum zone formation is studied with an idealized strait and funnel-shape estuary designed in this paper. There exists turbidity maximum zone at stagnation point, and its center locates at south side of the river coast. The reason of formation of estuarine turbidity maximum zone was revealed in terms of dynamic mechanism. Compared with the case of the strait estuary, the current divergence induced by the spreading width of funnel-shape estuary inner the mouth makes the current weaken, the distance of land-ward flow of density current at bottom layer induces, and the saltwater intrusion strengthens in the funnel-shape estuarine area. In addition the landward density induced current of bottom layer and its westward flowing distance increases. The westward intrusion distance of saltwater in the strait river channel region increases. The concentration of suspended sediment in the funnel-shape estuary decreases, but there are two turbidity maximum zones in it. One lies in the strait river way. Because the stagnant point moves toward upstream, its position relevantly moves toward upstream. However, the other lies in the south coast of the funnel-shape estuary area. It is mainly induced by the river flow, which turns toward the south coast under the effect of Coriolis Force, and the bottom transverse circulation which transport high concentration suspended sediment to the south coast. The variation of the river mouth shape has obvious impact on the estuarine circulation, the salinity intrusion and the turbidity maximum zone. Related Articles | Metrics Select The construction and application of a variable fertilizer model based on GIS DU Jing-long;;JIANG Li-ping Journal of East China Normal University(Natural Sc    2004, 2004 (4): 79-83.   Abstract （2968）            Knowledge map    By the data sampled from wusi farm ,input of fertilizer and the degree of the soil index of fertilizer are calculated using the empirical formula . At the same time,the variable input map of fertilizer and the fertilizer map are maped using GIS. The result shows:There exits difference with the fertilizer whin the field and the input of fertilizer is different too. Related Articles | Metrics Select Studies on Electron Microscopic Enzymo-Cytochemistry of Organelles of Vegetative- and Resting-cell in Euplotes encysticus Ni Bing;Sui Shuguang;Gu Fukang Journal of East China Normal University(Natural Sc    2004, 2004 (4): 97-102.   Abstract （3162）            Knowledge map    The electron microscopic enzymo-cytochemistry is used to study on the organelles in both vegetative- and resting cells of Euplotes encysticus. The results revealed that: (1)The reaction particles of adenosine triposphatase (ATPase) was tightly confined to the membrane of food vacuoles in the vegetative cells, while in the resting cells they gathered around the pellicle. (2)In the vegetative cells, the localization of the reaction particles of acid phosphatase (ACPase) was in the food vacuoles or the autophagic vacuoles of different stages, while in the resting they formed the vacuolar or spherical bodies. (3)The reaction particles of succinate dehydrogenase scattered on the mitochondrial in the vegetative cells, though they could also be seen in the scattered mitochondria in the resting cells, its activity was weaker than that of the former. Thus it was supposed from the above results: (1) In most cases, the enzyme activities in the resting cells were weaker than in the vegetative cells. (2) The enzyme activity and localization might be different in different kinds of resting cells. (3) The resting cells could also have digestive duration, energy consumption and functional mitochondria. Related Articles | Metrics Select Comparative Investigation of Morphogenesis and Isoenzymes between the Wild Cells KAX-3 and the Mutant Cells AK127 during the Dictyostelium Discoideum Development HOU Lian-sheng;MA Ning-sha;WANG Yue;HAN Yi;FU Zhuo-ming Journal of East China Normal University(Natural Sc    2004, 2004 (4): 103-110.   Abstract （4366）            Knowledge map    Studying the morphogenesis of Dictyostelium discoideum development, we found that there were distinct differences between the wild cells KAX-3 and the mutant cells AK127(LagC gene was knockout). The mutant cells AK127 was blocked at loose aggregation stage for lacking gp150 during developmental stages. However, the wild cells KAX-3 completed the whole developmental stages successfully. Three isoenzymes were obtained from developing cells of Dictyostelium discoideum which included a wild type cells(KAX-3) and a mutant type cells Compared these isoenzymes by gel electrophoresis, we found that two different esterases appreared in AK127 while only one in KAX-3. Furthermore, the content of malate dehydrogenase (MDH) is more in AK127 than in KAX-3 at different developing stage. At 14h during development, the content of glutamate dehydrogenase (GDH) in AK127 is higher than in KAX-3;but at 16h GDH in AK127 is lower than in KAX-3. From the results, we learned that the pattern of some isoenzymes were changed between wild cells and mutant cells during development stage, indicating some changes in the expression of some genes. So it seemed that gp150 was an important factor in development. Related Articles | Metrics Select Histology of the Male Reproductive System in Daphnia (Ctendaphnia) carinata ZHANG Ming-feng;;ZHAO Yun-long;ZEN Cuo;TANG Wen-jun Journal of East China Normal University(Natural Sc    2004, 2004 (4): 111-116.   Abstract （3027）            Knowledge map    The male reproductive system of Daphnia (Ctendaphnia) carinata is composed of a pair of testes, deferens and one male gonopore. The wall of the sausage-shaped testis is composed of connective tissue and germinal epithelium inside. The tube-shaped deferens, which gets larger at the end of it, is mainly made up of connective tissue. The spermatogenesis includes five stages: spermatogonium、primary spermatocyte、secondary spermaticyte、spermatid and spermatozoon. The mature sperm is clubbed and the spermatogenesis shows a tendency of synchronization. The sexual maturation experiences four stages. The male reproductive system retains its primative characters on structure and function, but it has also made up its adaptability through the long-time evolution, which enables Daphnia (Ctendaphnia) carinata and other species of Cladocera to live with the changeable living environment. Related Articles | Metrics Select Population structure of Heptacodium miconioides, an endangered species, in Dapan Mountain of Zhejiang Province LI Ming;GU Yong-jie;ZHANG Xin;CHEN Xiao-yong Journal of East China Normal University(Natural Sc    2004, 2004 (4): 117-121.   Abstract （3190）            Knowledge map    Heptacodium miconioides Rehd. (Caprifoliaceae), seven-son-flower, is an endangered species endemic to China. The population structure of H. miconioides was analyzed at genet and ramet levels, respectively, in Dapan Mountain of Zhejiang Province. No individual of size class I (height<0.33m) was found in all studied sites. Size-class III and IV had most abundant individuals. At ramet level, size-class II and III had most abundant stems. Generally, size-class structure indicated a relatively stable situation in Dapan Mountain. However, in some sites, H. miconioides had the risk of local extinction. Sites at mid-altitude had lowest stems per individual, whereas more stems per individual were found at lower or higher sites. Individuals of the largest size class (size class V) had significant more stems per individual than size class III and critically significant more than size class IV. Our observation indicated that the population of Dapan Mountain was regenerated via asexual reproduction. These results showed that H. miconioides in Dapan Mountain could be maintained if no dramatic changes in the habitats. A reserve should be set because Dapan Mountain may be the largest population of H. miconioides. Related Articles | Metrics Select Comparison of Two Kinds of Fast Food Container Using the Life-Cycle Assessment (LCA) Methodology Lin Feng-chun;Yang Kai Journal of East China Normal University(Natural Sc    2004, 2004 (4): 122-130.   Abstract （3326）            Knowledge map    Disposable expanded polystyrene fast food container is one of the main causes of “white pollution”. A comparison study on Expanded polystyrene（EPS） fast food containers and photicly/bioticly degradable ones has been carried out using the life-cycle assessment (LCA) methodology. The result shows that the environmental impacts of the two kinds of fast food container are mostly originated from production stage, and the main impacts are resources damage. The environmental harmony of EPS fast food container is higher than photicly/bioticly degradable ones when 70% of it is collected and recycled after being used. A comparison study on waste disposal scenarios shows that collecting and recycling has less environmental impacts than incinerating or landfilling for EPS fast food container, and incinerating has less environmental impacts than landfilling for photicly/bioticly degradable fast food containers. Some suggestions on ecological design of two kinds fast food container are put forward. Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (4): 131-133.   Abstract （2137）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (4): 134-137.   Abstract （2270）            Knowledge map    Related Articles | Metrics Select Journal of East China Normal University(Natural Sc    2004, 2004 (4): 138-141.   Abstract （2193）            Knowledge map    Related Articles | Metrics