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    Journal of East China Normal University(Natural Science) 2003 Vol.2003
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    On the Properties of Reflexive G-inverses of A Bordered Matrix
    GUO Wen-bin;WEI Mu-sheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 1-12.  
    Abstract2656)           
    In this article we study the relations among D1,D2,D3,D4, which are in the reflexive g-inverse matrix of the bordered matrix. By using the expression of Mr-, we also obtain the relation between and Mr-.
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    An Application of the Polar Tangential Coordinate
    PAN Sheng-liang
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 13-16.  
    Abstract2632)           
    In this paper, we will presennt a new type of smooth constant breadth curves with the help of the polar tangential coordinates (Minkowski's support function) for the closed convex curves in the plane.
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    Boundedness and Persistence of Lyness Equation with Variable Coefficients
    LI Xian-yi
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 17-20.  
    Abstract2645)           
    In this paper an invariant of an equation with variable coefficients is first found. Then, by utilizing the invariant, the boundedness and persistence of solutions of the Lyness equation is derived. Our result partly solves an open problem given by G.Ladas.
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    The Derivation Algebra of gl(C)
    XIA Li-meng;YANG Heng-yun;LIN Lei
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 21-24.  
    Abstract2558)           
    In this paper, it is proved that the derivation algebra of the Lie algebra of infinite matrices with finite nonzero entries is isomorphic to the quotient of the Lie algebra of infinite matrices with finite nonzero entries in each row and in each column nodulo its center. It os also proved that this quotient is a complete Lie algebra.
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    Identification of Laguerre Model and Design Variable for Time-varying Systems(2) ------Kalman filter algorithms
    DING Zhao-hong;SHA Quan;YUAN Zhen-dong
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 25-30.  
    Abstract2532)           
    It is supposed that the time-varying parameters included in the system are stationary AR(1) variable. The estimate of the mean square error (MSE) of transfer function for time-varying Laguerre model is discussed. The approximate expression of MSE for Kalman filter algorithms can be derived under following assumptions:the dynamic of the system is slowly changing, the adaptation is also quite slow and the order of model system is high enough. Using Laguerre model instead of FIR model,the MSE will be reduced and the order of Laguerre model is reduced as well. The optimization problems for design variables of time-varying system identification algorithms are discussed.
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    An Automated Calculating for A Class of Exact Solutions to Nonlinear Differential Equations
    LIU Ying-ping;LI Zhi-bin
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 31-37.  
    Abstract3043)           
    By the Mathematics-Mechanization method proposed by Wu Wentsun, a package RATH os developed to output directly the solitary wave solutions to a nonlinear differential equation, based on the maple system. With it nearly one hundred equations have been calculated. The results not only recover all known solutions, but also find some new solutions as well as solutions in the general form. Furthermore, most of the solutions are obtained with the running time no more than 10 seconds under PC Pentium Ⅲ.
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    The VHDL Realization of SCI Interface
    HU Wen-jing;LI Wai-yun;CHEN Song
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 38-41.  
    Abstract3034)           
    The design idea of SCI interface circuit is discussed in details, and the design method of digital systen use VHDL on EPLD is introduced.
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    Principle of Multi-floating Calibration and Application in Design of Moisture Teller
    ZHANG Wei-min;WANG Kai
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 42-47.  
    Abstract2692)           
    This paper proposed a new calibration method for capacitance moisture teller, which is called multi-floating calibration. The measuring ranges of the instrument are enlarged and the precision is improved while the new multi-floating calibration is used. A design example of moisture teller based on capacitance sensor is described.
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    An Application of Genetic Algorithm in GPR Data Analysis for Buried Tomb Relics
    YAO Meng;MENG Hai-yan
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 48-54.  
    Abstract2945)           
    This article introduces a new application of Genetic Algorithm in the field of remote sensing (Signal's data classifier). Based on Simple Genetic Algorithm, an improved performance could be attained through the data mining process with necessary object-related information from a seties of EM radar signal images. After the preprocessing stage, the target's lacating task could be modeled into a curve imitation process. Beyond the heredity from SAG, expert knowledge and environment conditions are put into consideration in the practical problem resolution. We suggest a possible way to locate the underground object in the relics detecting field. Compare with ordinary calssifier method GA is better on speed and accuracy of searching on target. In further work we shall pattern 3-D model of the relics using complex GA.
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    Research of Thick Hull in Thermal Image Theoretical Simulation of Ships
    GAO Lan-xiang;SHEN Guo-tu;YANG Bao-cheng;CAI Ji-guang
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 55-61.  
    Abstract2593)           
    "Thin hull" model has been used in the theoretical simulation researches of infrared images of objects on the sea up to now and static approximation adopted in the calculation. The physical model is developed for those ships which can mot be treated as thin hull and the temperature field changes with time. The model estabished can inherit the mature algorithms and software of the existing models. Through the extension of the theoretical equations and corresponding software of the thin hull model simulation calculations are made and the effects of body structures of a ship with thick deck on the changing temperature fields of the ship's outside surfaces are studied.
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    Photodegration of CuO/TiO2 Nanoparticles and Its Application
    AI Shi-yun;XIAN Yue-zhogn;CHEN Jun-shui;CAI Qi;JIN Li-tong
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 62-67.  
    Abstract2963)           
    CuO/TiO2 nanoparticles were prepared with hydrothrmal method and characterized by means of X-ray diffraction (XRD) and Transmission electronmicroscopy (TEM). The photocatalytic properties of the immobilization of CuO/TiO2 nanoparticles were assessed by measuring the photodegration of Rhodamine 6G in aqueous solution. These immobilization of CuO/TiO2 nanoparticles showed much higher photoactivity than immobilization of TiO2 nanoparticles. Results of this study also indicate that the photodegradative mechanisms are that the doping of Cu2+ in TiO2 nanoparticles made the ability of TiO2 particles adsorbed Oxggen enhance, and decreaded the recombination of photogenerated electrons and photogenerated hole in the interface of nanoparticles. Therefore the photogenerated reactions were accelerated. In addition, the results that the polluted water was treated with CuO/TiO2 nanoparticles wre exciting and promising.
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    Study of Gold Colloid Monolayer Modified Carbon Fiber Ultramicroelectrode and Its Application in Determination of Cytochrome C.
    ZHU Min;SHI Guo-yue;LIU Min;JIN Li-tong
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 68-73.  
    Abstract2838)           
    A novel chemically modified ultramicroelectrode os described for the detection of cytochrome Cin this paper. Firstly, ethidene diamine(ED) was eletropolymerized on the surface of carbon fiber ultramicroelectrode(UME),and then gold colloid nano particles was deposited on the surface(Au/ED/UME). At last, we dipped the Au/ED/UME into the potassium iodide solution and then the iodide ion was absorbed onto the surface of Au/ED/UME. The electrochemical behavior of the prepared modified I-/Au/ED/UME was studied. The chemically modified UME, which was used as working electrode, has good electrocatal reduction of cytochrome c with a detection limit of 3.2×10-7mol/L and a linear concentration range of 6.5×10-7~1.2×10-5mol/L(vs.SCE). We think it has great potential for application for in vivo studying of cytochrome C.
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    Synthesis and Properties of Tungstomolybdosilic Multicomponent Polyoxometalate Clusters with Transition Elements
    DAI Li-yi;SHAN Yong-kui;HE Ming-yuan
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 74-80.  
    Abstract2654)           
    In this paper, a serie of multicomponent substitued polyoxometalate clusters containing silicon, tungsten, molybdenum and earlier transition metal elements were synthesized. The genetal moleculat formulat was determined: K4H2[M(OH2)SiMo2W9O39].nH2O (M=Mn2+,Co2+,Ni2+,Cu2+, Zn2+, Cd2+; n=21-26). By means of IR,UV,XPS,TG-DTA, the properties and structural characteristics of the new tungstomolybdosilic multicomponent polyoxometalate clusters with transition elements were investigated.
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    Open Boundary Condition Considered Residula Current and Tidal Current Simultaneously in Ocean Model
    ZHU Jian-rong;FU De-jian
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 81-85.  
    Abstract3943)           
    It's needed to consider the effect of tidal current in order to numerically simulate the circulation realisically in a shallow sea, because the tidal mixing and tide-induced residual current have an important effect on the circulation. It's needed to set the current speed for the open boundary condition in stead of set the water level in order to balance of water volume flowing in and out the calculated domain. First, we verify the consistent of the tide and tidal current in the calculated domain in the case of open boundary condition with tidal level and tidal current. Then we consider the composition of the residual current and tidal current. It's necessary to verify numerically that whether we can give out the open boundary condition with the composition of residual current and tidal current simultaneously. Applied the ECOM, the numerical experiment with the tidal current open boundary codition shows that results are consistent with the tidal level open boundary condition by designing an idealized bay. It is successful to simulate the distribution of residual current in the case of considering the residual current and tidal current at the open boundary simultaneously. The conclusion in this paper can be referenced for the numerical calculation of current in the case of composition of residual current and tidal current.
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    The Influence of El Nino Events to Qiantangjiang Area
    GUO Zhong-yang;CHEN Zhong-yuan;PAN Li-fan;LU Yan
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 86-91.  
    Abstract2589)           
    Through analysis of five measure station (Fuyang,Misai; Futang; Jinhua and Quxian) in Qiantangjiang area from 1963 to 1998, the ralation of El Nino event with research area's precipitation in summer and winter is dicussed. The results indicate that the precipitation in different seasons is relation to El Nino event in different level.
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    Leaf Nutrient and Structural Characteristics of 32 Evergreen Broad-leaved Species
    HUANG Jian-jun;WANG Xi-hua
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 92-97.  
    Abstract3023)           
    In the present paper, leaf nutrient and structural characteristics of 32 evergreen broadleaved plant species were studied. The results are as follows: leaf N varies from 1.022% to 2.744%, the average is 1.606%; leaf P varies from 0.032%~0.227% and the average is 0.086%;N and P are positively correlated; leaf C varies from 36.49% to 53.85%and the average is 45.00%;SLA varies from 72.64 to 197.78 and the average is 119.29;leaf C is negatively correlated with SLA, but nutrient content isn't correlated with leaf C or SLA of these three life forms isn't significant.
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    Study on the Antioxidation Effects of Grape Seed Procyanidins Extract
    ZHU Zhen-qin;ZHAI Wan-yin;CHEN Ji-wu;XIA Jing;FU Bei-bei;XIE Ping;HU Tian-xi
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 98-102.  
    Abstract4057)           
    In order to study the antioxidation effects of grape seed procyanidins extract (GPE), seven chemiluminescence systems were used to determine the protective effect of GPE on DNA damage caused by ·OH and the scavenging effect of GPE on O2-、OH、H2O2 and ONOO- , and various reactive oxygen species produced during "respiration burst" of whole blood phagocytes. The inhibiting effect of GPE on lipid peroxidation was evaluated by using the colorimetric system of lipoprotein polyunsaturated fatty acids peroxidation induced by Fe2+. The experiments showed that GPE can effectively scavenge O2-、OH、H2O2 ,ONOO- and various reactive oxygen species prouduced during "respiration burst" of whole blood phagocytes, and inhibit lipid peroxidation (IC50s are 0.2ug/ml、90ug/ml、0.5ug/ml、10ug/ml、130ug/ml、70ug/ml respectively); the inhibiting rate of DNA oxidative damage is approximately 70%, when GPE at a concentration of 25ug/ml is given. These results indicate that GPE os an efficient antioxidant and can effectively scavenge various free radicals and provide effective protection anfinst DNA damage caused by ·OH.
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    Effects of PH on Physiological Characteristics of Heptacodium miconides
    LIU Peng;XU Gen-di;YANG Wei-wei
    Journal of East China Normal University(Natural Sc    2003, 2003 (1): 103-107.  
    Abstract2595)           
    The study deals with the changes of physiological characteristics(Photosynthetic, Exhaustion rate, Membrane permeability, Peroxidase activities, Ascorbate peroxidase actibities and root cativities) with different supplementation of PH of Heptacodium miconioides. There are 7 kinds of PH treatments (3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5)in our experiment. The results indicated that under PH 5.5 treatment,photosynthetic efficiency (Pn),respiratory intensity (Er), root activities (RA) and the activities of peroxidase (POD)、catalase(CAT)、ascorbate peroxidase (AP) of Heptacodium miconides leaves are the highest, and membrane permeability (MP) of Heptacodium miconioides leaves are the lowest. The growth of Heptacodium miconides is more favorable under PH 5.5 treatment. When PH of water medium is lower or higher than PH 5.5 ,it is disadvantageous to the growth of Heptacodium miconides.
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    A Remark on A Sphere Theorem with Mutually ε-critical
    LIAO Cai-sheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 1-5.  
    Abstract2433)           
    In this note, using Toponogov theorem for adial curvature, we prove some a sphere theorem for radial curvature.
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    One -dimensional Central Extensions for Variations of G2 of Characteristic 2
    LI Ke-feng;LIN Lei
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 6-10.  
    Abstract2410)           
    In this paper,we determine all these 1-dimensional central extensions for some variation of the classical Lie algebra G2 over a field F of characteristic 2,which were introduced by Prof. Guangyu Shen in [1].
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    Exact Solutions of Three-wave Coupled Nonlinar Partial Differential Equations in Physics
    HE Xiu-xia;NIE Xiao-bing
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 11-15.  
    Abstract2718)           
    The exact solutions of three-wave coupled nonlinar partial differential equations in a true physical problem are given by using the homogeneous balance method.
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    The Laplacian Spectrum of Unicyclic Graphs
    XIAO En-li;SHU Jin-long;WEN Ren-kai
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 16-21.  
    Abstract2681)           
    Let G be a graph .The Laplacian matrix L(G)=D(G)-A(G)is the difference of the diagonal matrix of vertex degrees and the 0-1 adjacency matrix. Various aspects of the spectrum of this matrix of unicyclic graphs are investigated. Particular attention is given to the algebraic connecticity, the second least eigenvalue of the Laplacian matrix.
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    Initial Problem for Stochastic Benjamin-Ono Equation and Application to Biological Population in Estuarial Areas
    LI Ying;WANG Li-reng
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 22-26.  
    Abstract2373)           
    In this paper,we obtain the integral representationof the solutionof initial value problem for stochastic Benjamin-Ono equation with gradient coupled noise, and give its application to the distribution of the biological population in estuarial areas, and then obtain distribution representation of 1-space.
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    Applications of Equivalent Martingale Measures Model in Pricing Option on Foreign Currency
    TIAN Rong;CHAI Jun
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 27-31.  
    Abstract2573)           
    Under stochastic interest, by using of equivalent martingale measures model, we discuss single-factor model and two-factor model respectively, and obtain pricing formula of European option on foreign currency.
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    Explicit Exact Solutions for A Class of Nonlinear Variable-coefficient Schrödinger Equation
    ZHANG Shan-qing;LI Zhi-bin
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 32-35.  
    Abstract2444)           
    Making a priori assumption to the solution of nonlinear variable-coefficient Schrödinger (NLS) equation, the explicit exact solutions for a class of NLS equation are obtained.
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    Quantum Logic Transformation Based on Spin-1/2 States
    MA Lei
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 36-39.  
    Abstract2350)           
    In this paper, by using the linear quantum transformation theory to spin operator, we offer an effective method to study the quantum logic gates based on spin-1/2states.The form of some basic quantum logic operations are also obtained.
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    A Study of Rubber Surface Modification Using Microwave Plasma
    LIAO Bin;AN Tong-yi;WANG Yuan-shan;ZHU Shou-zheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 40-45.  
    Abstract2960)           

    In this paper, the idea and method for surface modification of rubber using low temperature microwave p;asma are provided, and the theory of microwave plasma surface modification of rubber is discussed. It is discovered that the contact angle between the liquid and the treated surface of rubber obviously decreases with greatly improving water wettability, the polar functional groups of the modified surface of rubber greatly increase from ESCA, and the adhesion of the rubber treated with microwave plasma to steel evidently increases.

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    Studies of the Relationship between Proton Chemical Exchange and Substituent Electronic Effects in Some Metal-Olefin with DNMR
    ZHANG Gui-rong;Stephen Matchett;DAI Li-yi;LU Jia-xing
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 46-53.  
    Abstract2768)           
    The proton chemical exchanges, created by the rotation of carbon-carbon bond in some Metal-Olefines, were examined with three methods of Dynamic Nuclear Magnetic Resonance. They are Complete Line-shape Analysis, Magnetization Transfer and Spin-Lock. The rate constants of these chemical exchange trends with the Hammett constant of substituents in the Metal-Olefins studied.
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    The Sociological Analysis of Urban Recreation
    YU Sheng;HE Shan-bo
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 54-61.  
    Abstract2558)           
    With the social development and urbanization, how to develop the urban recreational function better is cared by more and more scholar and city managers. This paper tries to discuss the relations of the social development status and the urban recreation system by the analyse of the social conditions' impact on the urban recreation system and the questionnaire about different demands of the people with different social background. What's more,the author tries to do some tentative working about this area.
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    The Model and Prediction for the Density of Chlorine Ion in the Waters of the Yangtze River Estuary
    PAN Ren-liang;WANG Xin-wei;MAO Zhi-chang
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 62-67.  
    Abstract3208)           
    In this paper, the author use modern technology of the artificial neural network to analyse the law of dynamic change of the Chlorine ion in the water of the Yangtze river estuary. With the consider of different controlling water quantity project after the completion of the construction of the reservoir on Three Gorge Upward the Yangtze River, a BP neural network model is used for forecasting the denisity of Chlorine ion in Gaoqiao observation station. The results will be referred to related Shanghai department and water supply corporation for decision-making.
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    Impact of the Estuarine Funnel Shape on the Estuarine Circulation and Saltwater Intrusion
    ZHU Jian-rong;HU Song
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 68-73.  
    Abstract3551)           
    Using an improved ECOM model, designing an idealized strait and funnel-shape estuary, the impact of the estuarine funnel shape on the estuarine circulation and saltwater intrusion is studied. The saltwater intusion produces salinity front, there exists a land-ward density induced current under the salinity front, and the current speed at the upper layer obviously enhances due to mass continuty through the transverse section. There is a northward component of current at upper layer and a southward component of current at lower layer, this indicates that there exists transverse circulation. The salinity front induced by saltwater intrusion inclines northwestward horizontally that means the saltwater intrusion at the north coast of the estuary is stronger than at the south coast, and inclines toward upstream vertically that means the salwater intrusion at the lower layer is stronger than at upper layer. The higher salt water locates at the lower layer and near the north coast. The dynamic factors of saltwater intrusion are the tidal flood current, the land-ward density current and mixing. The Coriolis force makes the flood current deflect to the north coast, and the land-ward density current exists at the lower layer, those dynamic mechanism result in asymmetry distribution of salinity. The baroclinic pressure gradient force induced by the salinity distribution in transverse section directs the south coast and increases with the water depth, this results in the current at botton layer flows to the south coast. In order to keeping mass conservation, the divergence at bottom layer and north coast produces upwelling and rise of water level. This transverse distribution of water level makes the surface current flows northward, the above dynamic process induces a transverse circulation. The current divergence induced by the spreading width of funnel -shape estuary inner the mouth makes the current weaken and produces upwelling, the distance of land-ward flow of density current at bottom layer reduces,the salinity near the mouth increase, but the saltwater intrusion weakens; There exists obvious higher saltwater at the botton layer and south coast of the funnel-shape estuary; The vertical mixing enhances, and salinity tends to uniform vertically.
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    The Tidal Bore on the North Banch of Changjiang Estuary and Its Effects on the Estuary
    CHEN Shen-liang;CHEN Ji-yu;GU Guo-chuan
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 74-80.  
    Abstract3214)           
    The development,characteristics and cause of the tidal bore on the North Branch of Changjiang Estuary are expounded based on survey and measured data. The hydraulic jump can be distinguished using the Froude number. When the fliid tidal current velocity exceeds the propagation velocity of tidal wave, the water particles transfer the kinetic energy to the potential energy, therefore the water level abruptly jump and forms bore. Further analysis suggests that narrowed river channel increase flood current velocity and silted riverbed slows down tidal wave propagation velocity. The river channel of the North Branch of Changjiang Estuary has been narrowed and its bed has been silted for recent years because of natural processes and artificial actions, which are the main causes of increased bore frequency and strength. With the bore head advance, a great amount of saltwater and sediments flow upstream. It has profound effects on the river channel evolution and environment of the estuary.
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    Thinking on Determination of Domestic Water Price in Chinese Cities
    ZHANG De-zhen;CHEN Xi-qing
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 81-85.  
    Abstract2769)           
    This paper analyzes several abuses of the current single-measure water price in Chinese sities. It is proposed that an "equal-subsidy ladder" water price model should be applied to the domestic water price decision-making according to the present situation of China. The distributive justice of water-utilization welfare and the feasibility of economic accounting are also discussed in order to provide theoretic basis for the determination of domestic water price in Chinese cities.
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    Polymorphic Comparison between the Mitochondrial DNA of Vegetative Cell and Resting Cyst in Pseudourostyla Cristata
    DU Bao-jian;ZHANG Ying;NI Bing;GU Fu-kang
    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 86-90.  
    Abstract2715)           

    In order to study the relationship between vegetative cell and resting cyst, RAPD method was selected. The result revealed that: the polymorphic fragments amplified with primers S176、S267、S217、S259 and S319 share the same fragments, but the other primers such as S283、S180、S61、S64、S17、S55、S38、S30、S23 and S28 have deferent amplied fragments. There are 84 fragments were amplified by 15 random primers. In these fragments, both vegetative cell and resting cyst mtDNA have 28 similar fragments. The similarity values is 66.67%. It is implied that though there is similarity between mtDNA of vegetative cell and resting cyst, some changes may occurred in resting cyst mtDNA, these changes may be related to the function of resting cyst mitochondrion.

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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 91-94.  
    Abstract1551)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 95-98.  
    Abstract2000)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 99-101.  
    Abstract2015)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 102-103.  
    Abstract1711)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 104-105.  
    Abstract1762)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 106-107.  
    Abstract1553)           
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    Journal of East China Normal University(Natural Sc    2003, 2003 (2): 110-112.  
    Abstract1623)           
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    On the Simplest Filiform Lie Algebras
    LIN Lei
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 1-8.  
    Abstract2586)           
    In this paper,the concept of simplest filiform Lie algebra is introduced and properties of n-dimensional simplest filiform Lie algebra g are discussed. A filiform Lie algebra g over any field F is referred to as simplest if its Lie multiplication between elements of an adapted basis is trivial except for ones defining the basis. Almost all discussions in the article are under the assumption o dim g≥4. A realization of such a Lie algebra g is given and derivation algebra Der g is determined. It is proved that if for the base field F, its characteristic is zero or p>n-2 the derivation algebra Der g is a solvable complete Lie algebra.Automorphism groups of simplest filiform Lie algebra are determined and it is proved that it is proved that they are centerless and solvable if ∣F∣≥n. At the end of the paper ,it is shown that the simplest filiform moludar Lie algebra g is restrictable if and only if n<p+2. And for the nonrestricable case a minimal p-envelope of g is given.
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    The Nonlinear Singularly Pertubed Problems for Elliptic Equations
    WANG Hui;MO Jia-qi
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 9-12.  
    Abstract3050)           
    The nonlinear singularly perturbed problems for the elliptic equations are considered. Under suitable conditions, using the theory of differentisl inequalities the asymptotic behavior of solution for the boundary value problems are studied, which reduced equations posessess two intersecting solutions.
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    On-line Identification for Systems with Unknown Delay, Orders and Cofficients
    RUAN Rong-yao;YANG Chang-li;GONG Miao-kun
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 13-23.  
    Abstract3019)           
    This paper proposes a new recursive estimate algorithm for unknown time-delay,orders and coefficients of linear discrete-time stochastic control systems (ARMAX model). It is proved that the estimates of the time-delay, orders and coefficients are strongly consistent.Simultaneously, a faster convergent rate of the coefficient estimates to their true values is obtained.
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    The Estimates of Bounds on Ruin Probabilities under Perturbed Risk Models
    LIN Qing-min;WANG Rong-ming
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 24-30.  
    Abstract2647)           
    Bounds on the probabilities for risk processes perturbed by diffusion are considered. Using a generalization of Wald's fundamental identity, we derive upper and lower bounds in terms of some life distributions respectively. Examples on how to use these bounds are given,and comparision of our bounds with other's are considered.
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    A Simulation Model for A Stochastic Inventory System of FIFO Storage Queue Management
    HU You-hua;PAN Yin-rong;SUN Qiang
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 31-37.  
    Abstract2783)           
    In this paper a model of a stochastic inventory system is created based the simulation principle of the discrete event system. In the model the concept of FIFO storage queue is proposed.Therefore the more reslistic dynamic simulation of the inventory system including deterioration can be made to select a optimal (s,S)inventory policy.
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    Three Fraction Pade Approach Spectral Function to the Coupled Quadrupole System
    TU Jian-min;DING Jian-hua;SHEN Yu
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 38-42.  
    Abstract2611)           
    The spectral function P(ω) of the spin pair correlation function in a coupled quadrupole system are evaluated using the pade approximation starting from the exact derivation of frequency second and fourth order moments at high temperature limit. Different excited stste model of the spectral functions are given for different wave vectors.The effects of these parameters on the generalized spectral function are discussed.
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    Dynamical Analysis of the Motion of A Particle on fixed Hemispherical Surface
    PENG De-ying;WANG Shi-tao
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 43-48.  
    Abstract2497)           

    In this paper,we have discussed motion of particle on a fixed hemispherical smoothless surface and obtained following results;

    (1) Construct dynamical equation and gave its solution.

    (2) Establish range of particle initial kinetic energy .

    (3) Find out relation between escape angles and coefficient of kinetic friction.

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    The Charateristics of Topography Change on Nanhui Nan Shoal,Shanghai
    XIANG Wei-hua;LI Jiu-fa;XU Hai-gen;YU Zhi-ying
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 49-55.  
    Abstract2684)           
    Using empirical orthogonal function (EOF) method,this paper discusses the charateristics of topography change on Nanhui Nan Shoal.It is concluded as follows:First, erosion or deposition occurs sequentially from east to west alongshore.Second, there is an equilibrium node at the transitional part between submarine slope and seabed.Shoal profile change to the upside of the node is oppsite to the downside,i.e. the upside eroded while the downside deposited, and vice versa. The elevation change is very large on submarine slope, but it is relatively small on tidal flat and on seabed.
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    The Development of the Compound Eyes OF Macrobrachium nipponense
    LI Hong;WANG Qun;ZHAO Yun-long;ZHAO Yan-ming
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 56-60.  
    Abstract3109)           
    We studied the development of the compound eyes in Macrobrachium nipponense by histological section methods and electron microscopy.The results showed:At gastrula stage, the cells in front of the embryonic area graduslly cleave to form optic disc rudiment.When the embryo reaches egg-metanauplius stage,the optic ganglion bigins to form. At egg-protozoea stage,the pigment begins to appear. The structure of the compound eyes at egg-zoea stage is similar to the adult,which including lentigen,lentigen cell,crystalline cell, retirular cell and rhabdom.
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    Study on Size Variation of rDNA Internal Transcribed Spacer 1 in Eriocheir japonica sinensis (Decapoda,Grapsidae)
    TANG B0-ping;ZHOU Kai-ya;SONG Da-xiang;CHEN Li-qiao
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 61-68.  
    Abstract2884)           
    The intra-individual size variation of rDNA ITS1 (first internal transcribed spacer of rDNA) was detected in some invertebrates, such as Schistoaoma japonicum, Paragonimus westermani, Simulium. In our experiment of investigating the primary structure of ITS1 of Eriocheir japonica. sinensis the intra-individual size polymorphism was detemined at first, but further study showed that the polymorphism was an artifact,which was due to PCR primers mismatching.This conclusion was finally demonstrated by verifying conditions of PCR and reamplifying the ITS1 domain using redesigning primer that was corresponding to 5.8S rDNA sequences of E. japonica. sinensis that obtained in this study. The nucleotide sequence of the ITS1 of E.japonica sinensis has been firstly determined in this species.
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    Effects of Fragmentation on the Species Composition of Evergreen Broad-leaved Forests
    CHEN Xiao-yong;CHEN Bo;JIANG Yi-feng
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 69-74.  
    Abstract3309)           

    Forest fragmentation may lead deleterious consequences for plant community.Species richness and composition of fragmented,peninsular and continuous evergreen broad-leaved forests were investigated to evaluate fragmentation effects. Fragmented torests contain more apecies than continuous forests with comparable areas.Species richness is lowest in peninsular plots. Peninsular forests have few or comparable species richness. There are more exotic species (cultivated and escaped) in fragmented and peninsular plots than in continuous forests. Our study shows that patch size plays important role in species richness and composition. However, the surrounding matrix, time experiencing fragmentation and human disturbance also affect the plant species and composition. Liana is very low in disturbed peninsular forests and refllects the worse forest quality. It may be a useful indicator for conservation and management of evergreen broad-leaved forests under intensive human disturbance areas in eastern China.

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    The Study of Avian Community and Species Diversity in Shanghi Suburb Area in Sunmmer
    LUAN Xiao-feng;XIE Yi-min;DU De-chang;XU Hong-fa
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 75-82.  
    Abstract2928)           
    During the summer of 2001 and 2002, we studied three typical summering avian communities in twenty-seven habitats that belong to subtropical cultivated land,wetland and forestland habitats within the auburb area of Shanghai. 68 species,which belonged to 11 orders,25 families, were recorded in three habitats.The total average density of birds is 2.7237/hm2 ,The Shannon-wiener index(H)is 2.2815, species evenness(J) is 0.5407, C index is 0.2254. In three typical habitats,the diversity index(3.0759) in wetland area is higher than others, but the density (0.8495) is lower than others.On the contrary, the diversity index (1.6464) in cultivated land is lower than others but the density (4.9608) is higher than others. Meanwhile, the species of forest birds is few comparatively.The results showed that that teh density will be rose up through improving naturalness of enviroment,increasing spatial heterogeneity and reducing the disturbance of human beings.
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    The Impacts of Dredging on the Community and Structure of the Micro-invertebrate in Suzhou Creek
    DAI Ya-qi;XIONG Yun-qing;YOU Wen-hui
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 83-87.  
    Abstract3268)           
    From October 1999 to July 2001,this study investigated the effects of dredging on the community and structure of the micro-invertebrate in Huangdu and Huacao on headwaters of Suzhou creek. The result was that Mollusca and Oligochaeta were dominant in the both sites.Before dredging, there were six species of Mollusca,tree species of Oligochaeta and one of Hirudinea in Huangdu, and one Mollusca and four Oligochaetas in Huacao. After dredging,more species of invertebrate were found. In Huangdu,there was one species more than before, and in Huacao, there were four species more than before.So the recovery of the species in Huacao is more obvious. Dredging removed the density and biomass of the community, but the diversity of the community was increasing graduallu in one year. Furthermore, exponentisl of diversity of dredged was always higher than before in Huacao.But in Huangdu, it wasn't higher than before until half year later. It is suggested that dredging in headwaters of Suzhou creek help for the recovery of the community of micro-invertebrate.
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    Study on Influential Factors and Regulating on Discharge Levy of Catering and Service Industries in Shanghai
    TANG Min;YANG Kai;HUANG Chang-ying
    Journal of East China Normal University(Natural Sc    2003, 2003 (3): 88-94.  
    Abstract2722)           

    Taking Jing'an district of downtown in Shanghai as an example, the paper selected 580 catering and service industries in four seasons of 2000 and analyzed discharge levy according to cover 1000 monitoring data. The case study shows: ①The accumulative pollution load proportion of CODcr and Oil exceeds 95%, so they are the typical pollution factors in wasterwater.These trade that discharge wastewater above 1000tons per month are main pollutant headstreams for their total pollution load proportion is beyond 60%. The relationship betweenpollutant concentrations and scales of enterprises is negative and the concentrations are much thicker in amount of small scales trades. ② The relationship between the discharge levy amount and the total pollution load retains a highly positive correlation.The unit price ascends with increasing pollution load containing in per ton wastewater and they significantly accords with cubic estimation model. ③ The average unit price in Jing'an district at the level of 0.26yuan is lower than the average pollution abatement cost of 0.56yuan in wastewater plants in Shanghai.Based on above data analysis,the paper discussed regulating approaches on discharge levy of catering and service industries, such as implementation of all-out levy, combination of total quantity and concentration controlling, et al.It intends to supply external foundations for discharge levy standard and monitoring model in catering and service industries.

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    The Algebraic and Vertex Connectivity of Graphs
    XIAO en-li;SHU jin-long;WEN ren-kai
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 1-4.  
    Abstract4330)           

    G is a simple graph with a(G) and k(G), its algebraic and vertex connectivity.This paper finds all the graphs satisfying a(G)=k(G).G=(V,E) is a simple graph of order n with vertex connectivity k(G)≤[n/2],and H is one of G's minimal vertex cut set,then a(G)=k(G) holds if and only if for every u∈H and every v∈V\H, uv∈E.

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    About Minimal Submanifolds of Locally Symmetric Spaces
    LV yan;LIAO cai-sheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 5-11.  
    Abstract2509)           
    In this paper, we dicusses orentable compacted minimal submanifolds in orientable locally symmetric Riemannian manifolds and obtains a global pinching theorem for lenggth of second foundamental form for this manifolds.
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    Shared Values and Normality
    ZHANG Wen-hua;PANG Xue-cheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 12-18.  
    Abstract2691)           

    Let ∮be a family of meromorphic function on the unit disc ⊿ and let a and b be distinct values. If for every f∈∮, f and f(k) share a and b on ⊿ and the zero of f(z)-a are of multiplicity ≧k,where k≧3 be a positive integer,then ∮ is normal on ⊿.

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    Study on the Independentce of Continuouse Events
    WAN Fu-yong;XUH-kun
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 19-24.  
    Abstract2941)           
    In this paper, the relation between the independence of events and the probabilities of them is discussed from a series of mathematical experiments.We mainly focus on the case of continuous events. A typical example was given from correlation to independence.Our results show that there is a process from quantitative changes to qualitative changes for the correlation of events.
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    The Pricing Analysis of Irredeemable Convertible Bonds
    WANG Yuan-pei
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 25-32.  
    Abstract3739)           
    In this paper, we prove that there exist two boundaries which are the optimal exercise boundary and the worst exercise boundary by changing the valuation of convertible bonds into the two-free-boundary promblem of the Black-Scholes equation.When the value of a company acrosses increasingly the optimal exercise boundary,the return of its irredeemable bonds is largest if they are converted into its stocks.When the vale of a company acrosses decreasingly the worst exercise boundary,the value of its irredeemable bonds is zero if they are converted into its stocks.
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    A Cryptographic Voting Scheme Based on Discrete Logarithm
    CHEN Zhi-jie;WANG Zhen-hua;SHI Jian-yi;LU Hong-wen;LI Zhi-bin;YE Jia-chen;SHEN Chun-li
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 33-35.  
    Abstract2633)           
    A cryptographic voting scheme based on discrete logarithm is proposed in this paper. The voting scheme bearing the following characteristics:voting can not be falsified or denied;the voter has complete control of his own private key and need not share the key with others;the decision of each voter is kept secret.So this new voting scheme is especially suitable for the final decision-making process of an organization;
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    Design and Implementation of Digital Beamformer for Wideband Constant Beamwidth
    XIE Cheng-huan;HUANG Le;ZHU Shou-zheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 36-41.  
    Abstract2621)           
    This paper presents a scheme using the DFT orthogonalizing pre-process to implement a wideband constant beamwidth pattern for the digital beam-forming antenna array.This pre-process decomposes the input wideband signals into orthogonal outputs at discrete frequency points in a relevant frequency band.The complex weighting vector at the reference frequency is evaluated using Genetic Algorithm to make the array reponse cater for the pattern specified. The complex weighting vectors at other frequencies satisfying the request of wideband constant beamwidth can be deduced from the one at the reference frequency.The results of computer simulation show this scheme is effective.
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    A Kind of System Structure and Implementation of MIMI for GSM/GPRS Mobile Phone
    GU Zeng-hui;WONG Shu-xian;TONG Xiao-hui;LIU Jin-gao
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 42-48.  
    Abstract2596)           

    This article introduces a software platform which as is used in porable equipment supporting GSM or GPRS.It discusses the design and implementation of MIMI on this platform and provides connunication mechanism of system structure.It also improves interface to make it more humanized.

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    Simulation of Sea Images in the Infrared in the Wave Band of 3-5 Micron
    JIANG Jin;SHEN Guo-tu;YANG Bao-cheng;CAI Ji-guang
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 49-54.  
    Abstract2453)           
    The theoretical modeling of the infrared images of sea surface is quite important to the research of the infrared images of the ship.The paper studies the method of simulating the infrared images of sea surface in the wave band of 3-5 micron. The coarseness of sea surface is calculated by making use of the JONSWAP model and FFT.Fully considering various enviromental parameters such as sky radiance and sun radiance,the infrared images of sea surface in wave band of 3-5 micron can be simulated on computer.Also the paper has studied the influence of the angle of the detector.
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    The Experimental Measurment of the Material Linear Expansive Coefficient with the Holographic Interferometry Method
    ZHOU Jia-yuan;JIANG Yi-de;HUAN Qiang;HU Shi-lun;WANG Xiaoming;DAI Hui-ying
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 53-59.  
    Abstract2718)           
    This article introduced the experiment theorem and device of calculating the material linear expansive coefficient with the holographic interferometry.We obtained the first stept result and adopt forward the further improvement of the experiment and the method to decrease experiment error.The experiment is a new application of holographic interferometry to this field.
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    Study of the Aminating Electroreduction of Pyruvic Acid
    LIANG Jue;ZHANG Gui-rong;LIU Yuan-lan;TANG Jie;LIU Xiao-feng;CHEN Li-ming;LU Jia-xing
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 60-65.  
    Abstract2629)           
    In this paper,the aminating electroreduction of pyruvic acid was studied by potentiodynamic method.We have discussed a variety of factors of this reaction, such as style of cells,material of electrodes,temperature,the concentration of pyruvic acid and the buffer,oxygen resolved in the solution,etc.,which infuence the curve of linear sweep. The possible mechanism of the aminating electroreduction of pyruvis acid was obtained and we consider it as a CE reaction.
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    The Multiscale Analysis of Paleoclimate Change of the West Edge of the Loess Plateau Since 30,000 Years
    ZHANG Yu-fen;LI Chang-an;LIU Xue-mei;HUANG Chang-sheng
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 66-72.  
    Abstract2955)           
    It has been proved that Malti scale (Multi resolution) analysis of wavelet transforms in an important method to study the changing cycles of the Quaternary period climate on different time scales.In the west edge of the loess plateau,the wavelet analysis of magnetic capbability climate substitutute curve of HongZuiShi section shows that 1) there are about 56 climatic fluctuations of hundred-year-scales,15 climatic cycles of thousand-year-scale and 3 glacial staircases-interglacial staircase periods during the last glacial maximumin (30-10KaBP ) ; 2) in the thousand-year-scale climatic curve decomposed with wavelet,warm events are more outstanding, peaks(Denekamp,?(),(BΦL)); 3) younger Dryas Only has reflection in the hundred-year-scales climatic curve, it is not evident in the curve of long period; 4) in the hundred-year-scales climatic curve, the last glacial maximum fluctuation as frequuently and 18-28KaBP was the stage in which the frequency fluctuation was the largest.But the climatic fluctuation frequency tends to be regular with the increase of the period scale.
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    A Comparative Study on Muti-regression Analysis and Artificial Neural Network of Corn Production in China
    WU Yu-ming;XU Jian-hua
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 73-79.  
    Abstract3232)           
    Aiming at the influencing variables and data from the year of 1978 to 2000 in China, this paper sets up muti-regression analysis model and BP artificial neural network model. Take prediction of total corn production as an example, two methods of corn production prediction based on multi-regression analysis and BP artificial neural network model are introduced in this paper. The results show that after being exercised,the network can provide nonlinear mapping relation between independent variables and dependent variable of corn production in China. The model is novelty, has higher precision and good effect.It can be widely applied in modeling of many forecast area,and also has high generalizing value.
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    A Statistical Model of Storm-induced Deposition in the North Passage,Yangtze Estuary
    KONG Ya-zhen;SHI Feng-yan;ZHU Shou-xian
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 80-86.  
    Abstract3078)           
    By the analyses of main factors affecting storm-induced deposition in the North Passage,Yangtze Estuary, the previous storm-induced deposition formula has been improved,and a new formula has been presented in terms of the intensity and path of typhoon, the evolution tendency of local bedform and the tidal state.The handcast verification by use of No.9430 typhoon and No.9711 typhoon prove the calculated results from the new formula are in well agreement with the filed data.
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    Observed and Analysis on Hydrology in the Chagnjiang Estuary in March of 1996
    ZHU Jian-rong;LIU Xin-cheng;SHEN Huan-ting;XIAO Chen-you
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 87-93.  
    Abstract3220)           
    Based on the analysis of the observed hydrological data in March of 1996 in the Chagnjiang Estuary,the following results are concluded. In the North Branch, the velocity of the flood current is obviously larger than that of the ebb current, the residual current land-ward flows,and there exists serious saltwater instrusion from outer sea and from the upstream,i.e., from the North Branch, and is different with the variation pattern in regular estuary.The salinity is mainly influenced by the saltwater instrusion from outer sea during spring and early middle tide ,and by the saltwater instrusion from upsteam during neap and later middle tide. At the lower reachesof the South Branch, the the velocity of the ebb current is larger than that of the flood current and the ebb tide duration is longer than that of the flood. The maximum salinity occurs at the flood slack, and the minimum salinity occurs at the ebb slack.The salinity variation is affected by the saltwater intrusion from the outer sea, the hydrology obeys normal variation pattern in regular estuary.
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    General Design of Cadastral Management Information System of Towns and Cities
    YAN Zhi-min;WANG Feng-xia
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 94-98.  
    Abstract2841)           
    Acording to the status quo of Cadastral Management Information System of Towns and Cities in China , the aim and significance of establishing a Cadastral Management Information System of Towns and Cities was discussed. On the basic of explaining of the design ideas and principles of Cadastral Management Information System of Towns and Cities, the system structure,the data flow and the basic frame of system technical realization were particular set forth. The article provided a new way for current Cadastral Management Information System of Towns.
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    Ecological Succession and Sustainable Development in Taihu Lake
    CHEN Li-qiao;LIU Ying;YANG Zai-fu;CHEN Yong;ZHOU Zhong-liang
    Journal of East China Normal University(Natural Sc    2003, 2003 (4): 99-106.  
    Abstract2563)           
    The trend of ecological succession was studied for the past 50 years in Taihu Lake.With the passage of time ,the water quality has been worsening and sediment thickening ,while the density of phytoplankton has been increasing,species richness decreasing with the smaller species becoming dominant.The trophic status shows the tendency from meso-eutrophic type to near eutrophication.Potamogeton malialaianus was the dominant species of submerged plants in 1950s,but the rate of swamp forming is more rapidly due to the increasing sedimentation and rapid growing of emerging plant and leaf-floating plant after 1990s.Density and biomass of benthos raised from 1959 to 1989, but natural resources and biomass of mollusca reduced after 1990s rapidly because of pen fish culture and excessive catching,total yield of fisheries continued to raise.Since 1984,pen fish culture converted from extensive models to intensive ones,the culture species were shifted from regular species to high valued species, from heavy pollution and enviroment-hostile to ecological types.The comprehensive control and ecosystem rebuilding in Taihu Lake must be emphasized and carried out so as to maintain the sustainable development of lake resource.
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