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J* E* C* N* U* N* S* 2015 Vol.2015 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Ext-transfer for modular Lie algebras LI Yi-Yang Journal of East China Normal University(Natural Sc    2015, 2015 (1): 1-5.   DOI: 10.3969/j.issn.1000-5641.2015.01.001 Abstract （1193）      PDF（pc） （163KB）（1557）       Knowledge map    Save Let G be a connected reductive algebraic group over an algebraically closed field k of prime characteristic p and g = Lie(G). This paper studied the Ext-groups of g with a p-character  of standard Levi form. An Ext-transfer result from g-modules to the modules of its Levi subalgebras was obtained.  Reference | Related Articles | Metrics | Comments（0） Select Notes on Chen’s inequalities for submanifolds of real space forms with a semi-symmetric non-metric connection ZHANG Liang, ZHANG Pan Journal of East China Normal University(Natural Sc    2015, 2015 (1): 6-15.   DOI: 10.3969/j.issn.1000-5641.2015.01.002 Abstract （1140）      PDF（pc） （216KB）（1952）       Knowledge map    Save By using algebraic techniques, we proved Chen’s general inequalities for submanifolds of real space forms with a semi-symmetric non-metric connection, which generalized a result of C. ¨Ozg¨ur and A. Mihai. Also, a mistake of their paper has been modified. Reference | Related Articles | Metrics | Comments（0） Select null JIA Yang-Jie Journal of East China Normal University(Natural Sc    2015, 2015 (1): 16-26.   DOI: 10.3969/j.issn.1000-5641.2015.01.003 Abstract （1167）      PDF（pc） （282KB）（1370）       Knowledge map    Save null Reference | Related Articles | Metrics | Comments（0） Select Cells of the weighted Coxeter group (B3, ?) MI Qian-Qian, SHI Jian-Yi Journal of East China Normal University(Natural Sc    2015, 2015 (1): 27-41.   DOI: 10.3969/j.issn.1000-5641.2015.01.004 Abstract （1138）      PDF（pc） （319KB）（1348）       Knowledge map    Save The affine Coxeter group ( e B3, S) can be realized as the fixed point set of the affine Coxeter group ( e D4, eS) under a certain group automorphism α with α( eS) = eS. Let e? be the length function of e D4. We gave an explicit description for all the left cells of the weighted Coxeter group ( e B3, e?). Also§we showed that in the the weighted Coxeter groups ( e D4, e?) and ( e B3, e?), each left (respectively, two-sided) cell was left-connected (respectively, two-sided-connected). Reference | Related Articles | Metrics | Comments（0） Select Efficient characterization for I{2} and M{2} ZHENG Dao-Sheng Journal of East China Normal University(Natural Sc    2015, 2015 (1): 42-50.   DOI: 10.3969/j.issn.1000-5641.2015.01.005 Abstract （1055）      PDF（pc） （214KB）（1273）       Knowledge map    Save An important characterization formula for M{2} was given by Stewart where M 2 Cm×n. But this formula contains redundant arbitrary parameters, and therefore is nonefficient. This paper, by using the matrix full rank decomposition, showed that for a proper subset of I{2}s, which is denoted as B1, the redundant arbitrary parameters in Stewart’s formula can be eliminated, and I{2}s is a union set of its certain subsets, and each of the subsets is 2-norm isometry with B1. Finally, the efficient characterization fonmulas for I{2}s, I{2} and M{2} are obtained respectively. An algorithm was provided that can be used to compute any element of I{2}s, and avoid the repeat computation work for each element of I{2}s. Reference | Related Articles | Metrics | Comments（0） Select A general existence and uniqueness result on multidimensional BSDEs XU Shao-Ya, FAN Sheng-Jun Journal of East China Normal University(Natural Sc    2015, 2015 (1): 51-60.   DOI: 10.3969/j.issn.1000-5641.2015.01.006 Abstract （1248）      PDF（pc） （215KB）（1694）       Knowledge map    Save This paper established a general existence and uniqueness result of solutions for multidimensional backward stochastic differential equations (BSDEs) whose generators satisfy the weakly monotonic condition in y, which generalizes some existing results. Reference | Related Articles | Metrics | Comments（0） Select Error bounds of regularized gap functions for smooth and nonmonotone variational inequality problems WANG Li-Na, LI Ming-Hua Journal of East China Normal University(Natural Sc    2015, 2015 (1): 61-67.   DOI: 10.3969/j.issn.1000-5641.2015.01.007 Abstract （1066）      PDF（pc） （189KB）（1295）       Knowledge map    Save By using a class of regularized gap functions for a variational inequality problem, two kinds of global error bounds of the nonmonotone variational inequality problem under some different conditions was established. Reference | Related Articles | Metrics | Comments（0） Select Lipschitz equivalence of dust-like Lalley self-affine sets LI Wen-Wen, MA Yu-Tian Journal of East China Normal University(Natural Sc    2015, 2015 (1): 68-74.   DOI: 10.3969/j.issn.1000-5641.2015.01.008 Abstract （1149）      PDF（pc） （175KB）（1198）       Knowledge map    Save We consider a class of Lalley self-affine sets and show that two sets E and F from this class are Lipschitz equivalent if they are dust-like. Reference | Related Articles | Metrics | Comments（0） Select An oscillation result for some higher order linear differential equations HU Meng-Wei, HUANG Zhi-Gang, SUN Gui-Rong Journal of East China Normal University(Natural Sc    2015, 2015 (1): 75-83.   DOI: 10.3969/j.issn.1000-5641.2015.01.009 Abstract （1161）      PDF（pc） （295KB）（1329）       Knowledge map    Save The distribution of zeros of solutions of higher order linear differential equations with entire coefficients was investigated by using complex oscillation theory of linear differential equations. It was proved that the exponent of convergence of zeros of every transcendental solution of the equations is infinite if given a small perturbation to one of the coefficients. Reference | Related Articles | Metrics | Comments（0） Select An analytic proof for the formula of the first order obstruction making the dimensions of Bott-Chern cohomology groups and Aeppli cohomology groups jumping LIN Jie-Zhu, YE Xuan-Ming Journal of East China Normal University(Natural Sc    2015, 2015 (1): 84-94.   DOI: 10.3969/j.issn.1000-5641.2015.01.010 Abstract （1509）      PDF（pc） （332KB）（1471）       Knowledge map    Save Let X be a compact complex manifold, and let  : X ! B be a small deformation of X, the dimensions of the Bott-Chern cohomology groups or Aeppli cohomology groups may vary under this deformation. In [1], M. Schweitzer constructed a complex of sheaves L•p,q, and represented Bott-Chern cohomology groups or Aeppli cohomology groups as the cohomology groups of L•p,q. In [2], the author have studied this jumping phenomenon by studying the deformation obstructions of a hypercohomology class of a complex of sheaves B• p,q which is quasi-isomorphic to L• p,q[1]. In particular, they obtain an explicit formula for the obstructions. In this paper, the formula of the first order obstruction is proved in another way by using cohomology of L• p,q. Reference | Related Articles | Metrics | Comments（0） Select Single-value extension property for anti-diagonal operator matrices and their square CUI Miao-Miao, CAO Xiao-Hong Journal of East China Normal University(Natural Sc    2015, 2015 (1): 95-102.   DOI: 10.3969/j.issn.1000-5641.2015.01.011 Abstract （1230）      PDF（pc） （269KB）（1596）       Knowledge map    Save In this paper, we mainly proved the equivalence of the perturbation of single-value extension property for anti-diagonal operator matrices and their square on an infinite dimensional separable Hilbert space. Reference | Related Articles | Metrics | Comments（0） Select Series expansions for three familiar irrational numbers with free parameters WEI Chuan-An, GONG Dian-Xuan, WANG Qin Journal of East China Normal University(Natural Sc    2015, 2015 (1): 103-113.   DOI: 10.3969/j.issn.1000-5641.2015.01.012 Abstract （1279）      PDF（pc） （204KB）（1399）       Knowledge map    Save √2, √3and √5are important irrational numbers, but the series expansions for them are rare in the literature. In order to fill the gap, we established numerous series expansions for these numbers with free parameters in terms of the hypergeometric method. Reference | Related Articles | Metrics | Comments（0） Select On the independence number of edge chromatic critical graphs QI Lin-Ming, MIAO Lian-Ying, LI Wei-Qi Journal of East China Normal University(Natural Sc    2015, 2015 (1): 114-119.   DOI: 10.3969/j.issn.1000-5641.2015.01.013 Abstract （1176）      PDF（pc） （235KB）（1689）       Knowledge map    Save In 1968, Vizing conjectured for any edge chromatic critical graph G = (V,E) with maximum degree Δ and independence number α(G), α(G)≤|V|/2. In this paper, we proved that α(G) ≤(3Δ-3)/(5Δ-3)|V| for Δ∈{9,10} and α(G) ≤(15Δ-42)/(23Δ-42)|V| for Δ∈{11, · · · , 46} Reference | Related Articles | Metrics | Comments（0） Cited: Baidu(7) Select Harary index of unicyclic graphs with n vertices and k pendent vertices CAI Gai-Xiang, YU Gui-Dong, XING Bao-Hua Journal of East China Normal University(Natural Sc    2015, 2015 (1): 120-125.   DOI: 10.3969/j.issn.1000-5641.2015.01.014 Abstract （1336）      PDF（pc） （184KB）（1748）       Knowledge map    Save The Harary index is defined as the sum of reciprocals of distances between all pairs of vertices of a connected graph. In this paper, the graph with the largest Harary index among all the unicyclic graphs with n vertices and k pendent vertices were investigated. Reference | Related Articles | Metrics | Comments（0） Select On limit points of the third largest Laplacian eigenvalues of graphs WU Ya-Rong Journal of East China Normal University(Natural Sc    2015, 2015 (1): 126-130.   DOI: 10.3969/j.issn.1000-5641.2015.01.015 Abstract （1103）      PDF（pc） （193KB）（1445）       Knowledge map    Save For a different parameter $b$, let $l_G(b)$ denote the second largest root of $b\mu(\mu-2)\!-\!(\mu-1)^2(\mu-3)\!=\!0$ $(b\!=\!0,1,\cdots)$ and $l_T(b)$ denote the second largest root of $b\mu(\mu-2)\!-\!(\mu-1)^2(\mu-3)\!-\!(\mu-1)(\mu-2)\!=\!0$$(b\!=\!0,1,\cdots)$. Firstly, we will prove that there exist sequences of graphs  $\{G_{n,b}\}(b\!=\!0,1,\cdots)$ and $\{T_{n,b}\}(b\!=\!0,1,\cdots)$ such that their limit points of the third largest Laplacian eigenvalues are $l_G(b)$ and $l_T(b)$, respectively. Secondly, we will prove that $l_G(b)$, $l_T(b)$ and $2$ are all of the limit points of the third largest Laplacian eigenvalues which are no more than 2 Reference | Related Articles | Metrics | Comments（0） Select The linear arboricity of upper-embedded graph and secondary upper-embedded graph LYU Chang-Qing Journal of East China Normal University(Natural Sc    2015, 2015 (1): 131-135.   DOI: 10.3969/j.issn.1000-5641.2015.01.016 Abstract （1086）      PDF（pc） （255KB）（1306）       Knowledge map    Save The linear arboricity of a graph $G$ is the minimum number of linear forests which partition the edges of $G$. In the present, it is proved that if a upper-embedded graph $G$ has $\Delta\geqslant 3\sqrt{4-3\varepsilon}$  then its linear arboricity is $\lceil\frac{\Delta}{2}\rceil$\,and if a secondary upper-embedded graph $G$ has $\Delta\geqslant 6\sqrt{1-\varepsilon}$ then its linear arboricity is $\lceil \frac{\Delta}{2}\rceil$, where $\varepsilon\leqslant0$. It improves the bound of the conclusion in [1]. As its application, the linear arboricity of a  triangulation graph on double torus is concluded Reference | Related Articles | Metrics | Comments（0） Select On the maximal matching energy of graphs WU Ting-Zeng Journal of East China Normal University(Natural Sc    2015, 2015 (1): 136-141.   DOI: 10.3969/j.issn.1000-5641.2015.01.017 Abstract （1212）      PDF（pc） （251KB）（1501）       Knowledge map    Save The matching energy is defined as the sum of the absolute values of the zeros of the matching polynomial of a graph, which was firstly proposed by Gutman and Wagner (The matching energy of a graph, Discrete Appl. Math. 2012 (160): 2177õ2187). And they showed that the complete graph Kn had maximum matching energy in all graphs on n vertices. In this paper, among all graphs on n vertices, the graphs with i-th maximal matching energy are completely characterized, where i = 2, 3, . . . , 16. Reference | Related Articles | Metrics | Comments（0） Select The multi-object optimization of a spatial cable-driven parallel manipulator CHEN Jie, SUN Xiao-Long, MO Wei Journal of East China Normal University(Natural Sc    2015, 2015 (1): 142-150.   DOI: 10.3969/j.issn.1000-5641.2015.01.018 Abstract （1462）      PDF（pc） （756KB）（1693）       Knowledge map    Save This paper investigates the multi-object optimization for a spatial 6-DOF (degree-of-freedom) cable-driven parallel manipulator. The optimization based on an NN (neural network)-genetic algorithm was carried out respectively with regarded to workspace volume, the minimum tension and global dexterity index, then three groups of satisfactory solutions were obtained. Furthermore, the weight coefficients for the multi-object optimization model were gained through the grey clustering method. The results show that the NN-genetic algorithm is effective for the structural optimization and can provide a useful reference for the optimal design of similar manipulators Reference | Related Articles | Metrics | Comments（0） Select K coverage of WiFi signal node deployment based on AFSA LI Zhong-Xiang, CHEN Lei Journal of East China Normal University(Natural Sc    2015, 2015 (1): 151-160.   DOI: 10.3969/j.issn.10005641.2015.01.019 Abstract （1141）      PDF（pc） （4146KB）（1228）       Knowledge map    Save On the requirement of multiple wireless coverage in some hot applications like indoor positioning and navigation, multipath routing etc., this paper presented a K coverage placement scheme based on an improved Artificial FishSwarm Algorithm (AFSA). A simple obstacle interference describing model was also designed to make our simulation scenario closer to a real one. The simulative results showed that our method could obviously reduce the number of signal nodes and their aggregation on the premise of coverage. Reference | Related Articles | Metrics | Comments（0） Select An improved active contour model based on level set method WU Zhang, ZHU Min Journal of East China Normal University(Natural Sc    2015, 2015 (1): 161-171.   DOI: 10.3969/j.issn.1000-5641.2015.01.020 Abstract （1175）      PDF（pc） （1226KB）（1603）       Knowledge map    Save By using the local regional information which has the ability to enhance the image, an improved active contour model based on level set method is proposed. Defining a novel SPF function with a nonnegative kernel function and local intensity clustering property, the novel model could draw upon intensity information in local regions at a controllable scale. In addition, the penalizing term which can be called distance regularization term drives the motion of the zero level set toward desired locations. Experimental results for real and synthetic images show the desirable proposed method performances and the model efficiency on intensity inhomogeneities and weak boundaries Reference | Related Articles | Metrics | Comments（0） Select A quantitative analysis technique for multi-classes access control model based on security entropy CHE Tian-Wei, MA Jian-Feng, WANG Chao, LI Na Journal of East China Normal University(Natural Sc    2015, 2015 (1): 172-177.   DOI: 10.3969/j.issn.1000-5641.2015.01.021 Abstract （1177）      PDF（pc） （297KB）（1356）       Knowledge map    Save To resolve the problem of quantitative analysis on classificatory information systems, a quantitative analysis technique is proposed based on security entropy. Firstly, the security entropy is put forward according to the information theory, to calculate the uncertainty of the system's determinations on the irregular access behaviors. Then the security theorems of classificatory information systems are defined based on security entropy. Finally, the typical access control models are analyzed by the technique, the technique's practicability is validated, and security and applicability of these models are compared. The result proves that the technique is suit for security quantitative analysis on access control model and evaluation to access control capability in information system Reference | Related Articles | Metrics | Comments（0） Select Angular distributions of photo-fragment ions of CH3OH molecules in the femtosecond laser fields FAN Qing-Fei, YANG Yan, WU Hua, ZHOU Bin, WANG Xiao, TENG Chong, SUN Zhen-Rong, WU Liang-Ping Journal of East China Normal University(Natural Sc    2015, 2015 (1): 178-185.   DOI: 10.3969/j.issn.1000-5641.2015.01.022 Abstract （1288）      PDF（pc） （785KB）（1137）       Knowledge map    Save The multi-photon dissociation and coulomb explosion of methanol in the femtosecond laser field have been investigated by dc-slice imaging technique combined with time of flight mass spectroscopy. Time of flight mass spectroscopy and sliced images of fragment ions were obtained, and the kinetic energy release and angular distributions of photo-fragment ions were also measured. The kinetic energy release of CH2+,H2O+ and CH3+,OH+ meet the conservation of momentum, it is proved that they come from process of Coulomb explosion. Based on the comparison of the migration pathway and non-migration pathway from the C-O bond cleavage, the intensity dependence of the anisotropy parameter a2 and cos2θ values for each channel were calculated, which indicated the dynamic molecular alignments of methanol in the femtosecond laser fields dominates. Reference | Related Articles | Metrics | Comments（0） Select Ionization characteristics of the hydrogen ground state in an intense high-frequency laser field GAO Wan-Qin, WANG Jia-Xiang, ZHANG Ya-Yun Journal of East China Normal University(Natural Sc    2015, 2015 (1): 186-194.   DOI: 10.3969/j.issn.1000-5641.2015.01.023 Abstract （1179）      PDF（pc） （1736KB）（1374）       Knowledge map    Save By using phase average method, the ionization dynamics of the hydrogen ground state (1s) under an intense high-frequency laser pulse has been studied in details. The influence of the laser frequency, polarization, pulse length and phase upon the ionization rate are explored. It is found that the ionization is very sensitive to the pulse phase. According to the steepness of the pulse rising and falling time, we found a “mixed regime” in the pulse phase, which can be used to explain the different dynamics of the ionization. Reference | Related Articles | Metrics | Comments（0） Select Research on parton distributions in nucleon XU Shi-Lei, RUAN Jian-Hong Journal of East China Normal University(Natural Sc    2015, 2015 (1): 195-202.   DOI: 10.3969/j.issn.1000-5641.2015.01.024 Abstract （1221）      PDF（pc） （851KB）（1366）       Knowledge map    Save We present the parton distributions at leading order (LO) coming from GJR, MSTW and CTEQ parton sets and compare them at different momentum scales. Obvious differences exist in their gluon and sea quark distributions at small x region. Itindicates that people have not known the nucleon parton distributions very well. We analysze the influence of higher twist effects, i.e., the shadowing effects and anti-shadowing effects, on parton distributions. Because of the shadowing effects, the twist-4 gluon and sea quark distributions are smaller than the twist-2 distributions at small and middle x region, while, the anti-shadowing effects make the twist-4 gluon and sea quark distributions larger than the twist-2 distributions at x & 2 region. Finally, we present a detailed analysis of how the proton’s momentum is shared among various parton flavors at different Q2 for different parton sets. With the numerical calculation, we show that the MD-DGLAP equations are momentum conservation. Reference | Related Articles | Metrics | Comments（0） Select Resonant modes and peak gain analysis of LLC resonant converter ZHANG Li-Sheng Journal of East China Normal University(Natural Sc    2015, 2015 (1): 203-211.   DOI: 10.3969/j.issn.1000-5641.2015.01.025 Abstract （2221）      PDF（pc） （944KB）（2155）       Knowledge map    Save LLC resonant converter has outstanding advantages in high power conversion efficiency and wide range adaptability of input voltage, but research on the peak gain is clearly insufficient. Therefore, the peak gain of LLC resonant converter is studied. According to the operation process of the series-parallel resonance, the converter can be divided into three resonant modes: inadequate resonant mode, complete resonant mode and over resonant mode. When the converter operates in complete resonant mode, it reaches its maximum value, and the corresponding switching frequency is named critical frequency. Finally, derivation of time-domain expression of the peak gain and the critical frequency is completed through the establishment of the converter state equations, and the accuracy of theoretical analysis is verified through simulation and experiment. Reference | Related Articles | Metrics | Comments（0） Select Investigation, oleaginousness of the major nonfood biodiesel plant resources in Shanghai, Jiangsu and Anhui provinces LI Xing-Lin, LIU Qiao-Xia, CHENG Zhi-Quan, HU Chao, GE Bin-Jie, LI Hong-Qing, TIAN Huai-Zhen Journal of East China Normal University(Natural Sc    2015, 2015 (1): 212-223.   DOI: 10.3969/j.issn.10005641.2015.01.026 Abstract （1484）      PDF（pc） （606KB）（1464）       Knowledge map    Save The characteristics and distribution of the current Nonfood Biodiesel Plant (NFBP) resources in Shanghai, Jiangsu and Anhui provinces were investigated and the oil content of these plants were detected. The results showed that 151 species of energy plants in 59 families and 123 genera were of higher than 10% oil content. The oil content of some species such as Lindera chienii, L. angustifolia and L. rubronervia in Lauraceae, Euonymus maackii in Celastraceae, Vernicia fordii and Ricinus communis in Euphorbiaceae, Camellia sinensis in Theaceae were higher than 50%. Only Triadica sebifera were widely cultivated and utilized, Camellia oleifera and Vernicia fordi were less utilized, C. sinensis had not been utilized. Finally, some suggestions on the potential development were given according to the actual situation of NFBP resources in Shanghai, Jiangsu and Anhui provinces. Reference | Related Articles | Metrics | Comments（0） Select Analysis on regional industries based on input output table and SNA: A case of seven provinces in Eastern China SUN Lu, XUE Bing, GENG Yong, ZHANG Li-Ming Journal of East China Normal University(Natural Sc    2015, 2015 (1): 224-233.   DOI: 10.3969/j.issn.10005641.2015.01.027 Abstract （1807）      PDF（pc） （947KB）（2093）       Knowledge map    Save Industrial relationship is the basis of investigating the industrial agglomeration, understanding the industrial structure and clarifying the industrial associations. By employing the methodology of Social Networking Analysis (SNA) based on the 2002 and 2007 InputOutput Table, this paper aims to carry out the quantitative study on the industrial relationship, measure the economic ties degree and identify the various functions of different industries. By taking the seven provincial regions located in Eastern China as cases, 42 industrial sectors are studied by calculating the cluster degree, nodes centrality, nodes intermediary, and closedegree to the center. The results show that, Shanghai has the highest industrial coupling degree while Anhui province is the lowest; the industries have different levels, and about 8 clusters have been formed, such a close industrial economic relationship means that the tendency of economic integration. The results of this study could provide quantitative analysis of industrial relationship and restructuring the industries. Reference | Related Articles | Metrics | Comments（0） Select Forecasting of Shanghai Port container throughput  under seasonal variation influence DU Gang, LIU Ya-Nan Journal of East China Normal University(Natural Sc    2015, 2015 (1): 234-239.   DOI: 10.3969/j.issn.10005641.2015.01.028 Abstract （1342）      PDF（pc） （1401KB）（2031）       Knowledge map    Save It is very important for successful port operation and effective decisionmakingby forecasting container throughput accurately. The Autoregressive Integrated Moving Average model (ARIMA) and the Seasonal Autoregressive Integrated Moving Average model(SARIMA) are applied to the monthly data from 2007 to 2012 of Shanghai Port container throughput to forecast the container throughput of Shanghai Port. The seasonal variation of monthly port container throughputdata can be handled by SARIMA. Compared with ARIMA, SARIMA performed better and improved the Port container throughputprediction accuracy because of removing the seasonal variation. Reference | Related Articles | Metrics | Comments（0） Select Remote sensing and GIS based analysis of urban ecological  network in Pudong New Area, Shanghai ZHANG Lin, TIAN Bo, ZHOU Yun-Xuan, ZHU Chun-Jiao Journal of East China Normal University(Natural Sc    2015, 2015 (1): 240-251.   DOI: 10.3969/j.issn.10005641.2015.01.000 Abstract （1478）      PDF（pc） （3405KB）（2032）       Knowledge map    Save Grassland, forest land and wetland are ecological habitats and elements of the basic urban ecological network of Pudong New Area in Shanghai. Due to the rapid growth in population and economy, the builtup area of Pudong New Area expands quickly, which result in the ecological habitats area decrease and fragmentation. The immediate consequences are the lowering of its ecological function and connectivity of the ecological networks. Using high resolution images from satellite FW2 acquired in 2011 and in combination with the ground investigations, we obtain the land use and land cover data of grass lands, forests land and wetlands by applying objectoriented remote sensing classification method and visualpostprocessing method. Supported by GIS techniques, we useseveral quantitative analysis algorithms, including Multilevel Weights, LeastCost Path and Gravity Model, to quantify the structure ofthe ecological network. The results show that: (1) the total area of grass lands, forest landsand wetlands in Pudong New Area is 179.9×103 hm2 , which is 65.41% of the total area; (2) there are few large patches with strong ecological suitability, and imbalanced along north-south direction; (3)the forest landsare the superior landscape type in the ecological network of the study area and make up 51.39% in the 10meterwidth ecological buffer zone; (4)Jiuduansha Wetland and Nanhui Dongtan Wildlife Sanctuary play important roles in ecological niche; and (5)land use structure changes rabidly with the increase of buffer distance, that is the ecological habitats reduce while building area increases. Reference | Related Articles | Metrics | Comments（0） Select Coupling of sulfur and iron with nitrogen and phosphorus in sediments of malodorous river: A review LI Wen-Chao, WANG Wen-Hao, HE Yan, HUANG Min-Sheng, LI Zhi-Hong, ZHOU Kun, ZHU Lin-Lin Journal of East China Normal University(Natural Sc    2015, 2015 (2): 1-8.   DOI: 10.3969/j.issn.1000-5641.2015.02.001 Abstract （1840）      PDF（pc） （1957KB）（2596）       Knowledge map    Save The coupling of sulfur and iron with nitrogen and phosphorus are intertwined to regulate the release of endogenous pollution from polluted river sediments. This paper summarized the environment behavior of blackening and odorcausing elements of sulfur and iron with key nutrients of nitrogen and phosphorus as well as the latest research progress on their coupling mechanisms. It also emphasized the great significance of exploring the coupling progress of sulfur and iron with nitrogen and phosphorus for solving the tough problem of reducing the nitrogen and phosphorus levels below national consent standards in treating malodorous rivers. Reference | Related Articles | Metrics | Comments（0） Select Study on formation mechanism, and control and preventive measures of eutrophication secondary disasters in urban malodorous back river CAO Cheng-Jin, CHEN Zhen-Lou, HUANG Min-Sheng Journal of East China Normal University(Natural Sc    2015, 2015 (2): 9-20.   DOI: 10.3969/j.issn.1000-5641.2015.02.002 Abstract （1454）      PDF（pc） （3644KB）（2411）       Knowledge map    Save In this paper, the eutrophication secondary disasters in urban malodorousback river were reviewed from the forming and treatment of “malodorousback”, and the disaster forms and control and preventive measures. The results indicated that with the implementation of many treatment projects, technologies and measures in pollution control and remediation, pollution load of urban malodorousback river was greatly reduced, water quality had been much improved, and the “malodorousback” disappeared gradually. All these resulted to the nutrient that can be utilized by plant was at high level, and the damaged ecosystem of urban river was restored and constructed. Once those environmental factors were very suitable, the major outbreak of eutrophication secondary disasters (e.g. algal bloom, Lemna minor L, Eichhorniacrassipes.) could be unavoidable. For its part, the control and preventive measures of eutrophication secondary disasters must be based on the treatment and remediation of “malodorousback”. In addition, we realized that the outbreak of eutrophication secondary disasters would be an unavoidable stage of the treatment and remediation of “malodorousback”, and the current focus on pollution control and remediation of urban river should be changed from the severe pollution treatment (e.g. “malodorousback”) to the nutrient (Nitrogen, phosphorus, etc.) control. Reference | Related Articles | Metrics | Comments（0） Select Influence of the geographic landscape on mosquito breeding in summer in Shanghai MA Ming-Hai, ZHANG Bo, HUANG Min-Sheng, LENG Pei-恩 Journal of East China Normal University(Natural Sc    2015, 2015 (2): 21-29.   DOI: 10.3969/j.issn.1000-5641.2015.02.003 Abstract （1438）      PDF（pc） （5323KB）（1599）       Knowledge map    Save The data of land utilization and landscape diversity within mosquito monitoring point buffers in summer of 2007—2008 in Shanghai were extracted by remote sensing and geographic information system. In order to provide a reference basis for prevention and control of anophelism during the process of urbanization, the effect of variation and characteristic of spatial distribution of water and vegetation on mosquito density fluctuation were analyzed. The results showed that there was a positive relationship between mosquito density and landscape diversity, density of water network and vegetation, while negative relationship with degree of landscape fragmentation. It was conducive to mosquito breeding when the degree of vegetation coverage was 50%~70% in the study districts. The mosquito density of water and water conservancy facilities was larger than other types of land use and the mosquito density of suburb exceeded downtown of Shanghai in summer of 2007—2008. Therefore, the urban construction would influence the mosquito density significantly. Reference | Related Articles | Metrics | Comments（0） Select Analysis and assessment on monthly dynamics of water quality in six medium and small creeks in Shanghai MA Ming-Hai, HUANG Min-Sheng, HU Wei, WEI Jin-Bao, LIU Su-Fang, MA Jun-Fei, HAN Li Journal of East China Normal University(Natural Sc    2015, 2015 (2): 30-39.   DOI: 10.3969/j.issn.1000-5641.2015.02.004 Abstract （1301）      PDF（pc） （3191KB）（1416）       Knowledge map    Save The parameters of water quality such as pH, WT, DO, SD,  NH4+-N,TN,DP,TP,CODCr,CODMn,BOD5,TOC和Chl-a were chosen as primary assessment factors to evaluate the water quality of six medium and small creeks in Shanghai by principal component analysis, comprehensive pollution index, comprehensive nutritive index, organic pollution index and comprehensive water quality identification index from Match 2013 to February 2014. The evaluation methods were compared, and pollution sources of creeks were also analyzed. Results showed that great spatial difference was obtained among the water qualities of six creeks. The water quality of Danjiang creek was the worst, followed by Gongye creek, and that of Liwa creek was the best. TN and TP were the main primary pollution factors. The major form of total phosphorus in the six creeks was existed as dissolved phosphorus. The main form of nitrogen in creeks of Gongye, Changbang, Zhenru and Danjiang was of ammonia nitrogen. However, nitrate nitrogen was considered as the main form of nitrogen in creeks of Yingtao and Liwa. Reference | Related Articles | Metrics | Comments（0） Select Review of simulation research in hydrology and water quality based on HSPF model HAN Li, LIU Su-Fang, HUANG Min-Sheng, MA Jun-Fei, WEI Jin-Bao, HU Wei Journal of East China Normal University(Natural Sc    2015, 2015 (2): 40-47.   DOI: 10.3969/j.issn.1000-5641.2015.02.005 Abstract （1714）      PDF（pc） （464KB）（1609）       Knowledge map    Save Hydrological Simulation ProgramFortran (HSPF) is a comprehensively semidistributed hydrological model and can simulate hydrological conditions and water quality accurately in watersheds. It has been extensively applied in the fields of water resources and environment. The article reviewed the model mechanism of hydrology，sediment erosion and migration of pollutants, and summarized the latest devolepments in the modeling of the runoff, the migration of pollutants,the influence of land use or land cover change and climate change on watersheds. Besides, the research directions of complete the model were discussed, including the migration mechanism of pollutant, the uncertainty of model parameters and the combination with other models. Reference | Related Articles | Metrics | Comments（0） Select Effects of environment factors on the growth of phytoplankton in Dishui Lake ZHANG Yan-Yan, WEI Jin-Bao, HUANG Min-Sheng, CAO Cheng-Jin, HE Yan Journal of East China Normal University(Natural Sc    2015, 2015 (2): 48-57.   DOI: 10.3969/j.issn.1000-5641.2015.02.006 Abstract （1369）      PDF（pc） （2590KB）（1546）       Knowledge map    Save In order to understand the effects of environment factors on phytoplankton growth, phytoplankton in Dishui Lake had been sampled at 14 monitoring spot locations in December of 2012 and April, July, November of 2013, respectively. The physical and chemical indicators had been monitored to analyze the growth of phytoplankton and the spacetime characteristics of influence factors. Correlative analysis was also made to determine major parameters that influence the growth of phytoplankton in Dishui Lake. It showed that main diversion channel of Dishui Lake is much higher than that of other sites. Seasonal variety of phytoplankton density was similar to that of chlorophylla content, but phytoplankton density of summer was a little higher than that of winter. The effect of filter feeding fish on phytoplankton can explain this phenomenon. Correlation analysis indicated that total phosphorous concentration had great influence on the growth of phytoplankton. This study provides biological basement in evaluating water quality and prevents eutrophication of Dishui Lake. Reference | Related Articles | Metrics | Comments（0） Select Impact of dredging on water quality of Niuqiaodi River in Wenzhou TONG Min, YANG Le, HUANG Min-Sheng, HE Yan, CAO Cheng-Jin Journal of East China Normal University(Natural Sc    2015, 2015 (2): 58-66.   DOI: 10.3969/j.issn.1000-5641.2015.02.007 Abstract （1269）      PDF（pc） （5127KB）（1542）       Knowledge map    Save The physicochemical factors, heavy metals and biological toxicity in water sample before, during and after dredging of Niuqiaodi River in Wenzhou were investigated. The result showed that after the sediment dredging of Niuqiaodi River, the CODCr concentration in water sample was significantly reduced, while the DO content and transparency were enhanced. The contents of NH+4-N, TN, TP and heavy metals in water sample were firstly increased and then decreased. Both the Luminescent bacteria and Xenopus tropicalis embryos tests indicated the toxicity of water sample firstly weakened, then enhanced in different stages of dredging. Generally speaking, sediment dredging was helpful to alleviate the toxicity of water sample. The correlation analysis showed the toxicity of water sample was significantly related to TN content and had little relationship with heavy metals. Reference | Related Articles | Metrics | Comments（0） Select Impact of dredging on sediment quality of Niuqiaodi  River in Wenzhou TONG Min, LI Wen-Chao, HUANG Min-Sheng, HE Yan, CAO Cheng-Jin Journal of East China Normal University(Natural Sc    2015, 2015 (2): 67-74.   DOI: 10.3969/j.issn.1000-5641.2015.02.008 Abstract （1396）      PDF（pc） （3126KB）（1054）       Knowledge map    Save The physicochemical factors and heavy metals in sediment before, during and after dredging of Niuqiaodi River in Wenzhou were investigated. The result showed that after the sediment dredging of Niuqiaodi River, the contents of TP, TOC and heavy metal in sediment were firstly decreased and then increased. The heavy metal contents in sediment reached the lowest level in one to three months after dredging. The contents of the pollutants in the river were significantly reduced after sediment dredging, but the improvement of water quality and sediment only lasts three to nine months. The evaluation results of the geoaccumulation index (Igeo) and the potential ecological risk evaluation indicated the sediments of Niuqiaodi River were seriously polluted by heavy metals and the sediment dredging contributed to reduction of pollution levels of heavy metals in sediment. Reference | Related Articles | Metrics | Comments（0） Select Pollution characteristics and ecological risk assessment of heavy metals in reclamation district of Lingkun Island in Wenzhou TONG Min, HUANG Min-Sheng, HE Yan, CAO Cheng-Jin Journal of East China Normal University(Natural Sc    2015, 2015 (2): 75-83.   DOI: 10.3969/j.issn.1000-5641.2015.02.009 Abstract （1346）      PDF（pc） （3524KB）（1777）       Knowledge map    Save The reclamation district of Lingkun Island in Wenzhou was taken as a study object in order to supply reference for rational planning of reclamation district, through determinations and risk assessments of heavy metal Cd、Cr、Cu、Zn、Mn、Ni、Pb、Hg and As in samples collected from six areas. The results showed the soils of reclamation district area were polluted by Cd and Hg，with the geoaccumulation index of Cd and Hg higher than that of other heavy metals, which contributed to the ecological risk of heavy metals in reclamation district. The contents of heavy metals in the soil of survey area were sediment reclamation district> agricultural district> other 4 districts. The Luminescent bacteria tests indicated the soils of sediment reclamation district belonged to medium toxicity, where the Xenopus tropicalis embryos hardly survived. Therefore, recovery methods of sediment reclamation district should be taken before the utilization and development. Reference | Related Articles | Metrics | Comments（0） Select Responses of bacterial community structure in malodorous river sediments to aeration by DGGE HE Yan, YAO Li-Ping, LI Wen-Chao, HUANG Min-Sheng, ZHANG Yi-Fan Journal of East China Normal University(Natural Sc    2015, 2015 (2): 84-90.   DOI: 10.3969/j.issn.1000-5641.2015.02.010 Abstract （1036）      PDF（pc） （1975KB）（1686）       Knowledge map    Save In this study, 16S rDNA based PCR amplification and denaturing gradientgel electrophoresis (PCRDGGE) as well as sequence alignment from the excised DGGE bands were used to investigate the bacterial diversity and variation. In addition, the redundancy analysis was adopted to assess the relationship between bacterial community structure and environmental factors. The results showed that aeration had marked effects on bacterial community structure in malodorous river sediments and different aeration intensities resulted in variable bacterial community. Amongst them the highest richness of bacterial community was observed with the aeration turbulence of Re=1 810 and DO of 7.35. It was also inferred that moderate aeration facilitated the growths of related bacteria to N and Scycling and theProteobacteria was dominant. It was also found that DO and Re played important roles in bacterial community from river sediments. Reference | Related Articles | Metrics | Comments（0） Select Research of process, effect and application on the nitrate induced sulfur autotrophic denitrification in polluted sediment: A review CHEN Jian-Jun, ZHANG Jian, HUANG Min-Sheng, LU Shao-Yong Journal of East China Normal University(Natural Sc    2015, 2015 (2): 91-97.   DOI: 10.3969/j.issn.1000-5641.2015.02.011 Abstract （1674）      PDF（pc） （389KB）（2045）       Knowledge map    Save The black odor problems in the urban river of current China are in need to be solved urgently. In recent years, the insuit polluted sediment remediation technology of nitrateinduced indigenous microbial promoting was focused among many researchers. However, attention on the key reaction of sulfur autotrophic denitrification (SAD) was comparatively rare. The application research situations of SAD in the field of environmental pollution control were firstly introduced in this paper. Then the characters, the course of SAD, the production and accumulation byproducts (N2O、NO-2) reaction in sediment were discussed, as well as the research progress in population ecology characters and the population ecological relation between NRSOB and SRB. In addition, the some scientific problems in these researches which are not clear now were pointed out in the text. Finally, it was proposed that the research work of the denitrification process and mechanism of molecular ecology on sulfur autotrophic denitrification in the blackodor river sediment were important to the development of black odor control research work in the river of China. Reference | Related Articles | Metrics | Comments（0）