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J* E* C* N* U* N* S* 2016 Vol.2016 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Review and perspective: Function of intestinal microbiota in aquatic animals ZHANG Mei-Ling, DU Zhen-Yu Journal of East China Normal University(Natural Sc    2016, 2016 (1): 1-8.   DOI: 10.3969/j.issn.10005641.2016.01.001 Abstract （1827）   HTML （22）    PDF（pc） （864KB）（1976）       Knowledge map    Save The digestive tracts of vertebrates harbors complex assemblages of bacterial community, which play important roles in nutrient absorption, immune regulation and epithelial development in the host. Although aquatic animals represent the biggest taxonomic and ecological diversity, our knowledge about their intestinal bacteria composition and function is limited. This paper summarizes the recent progress in the research of intestinal bacteria, including the factors influencing the intestinal microbiota assemble, features of the intestinal microbiota in aquaculture and the relationship between the host and the intestinal bacteria，and suggestes the significance and perspective of microbial ecology in aquaculture in future. Reference | Related Articles | Metrics | Comments（0） Select the q-commutators of braided groups HU Hong-Mei Journal of East China Normal University(Natural Sc    2016, 2016 (1): 9-18.   DOI: 10.3969/j.issn.1000-5641.2016.01.002 Abstract （1227）   HTML （146）    PDF（pc） （289KB）（1020）       Knowledge map    Save With the standard R-matrices and suitably chosen a pair of dual braided groups, the authors gave the rank-inductive constructions of U_q}(\mathfrakg}}) for the ABCD series via the double-bosonization theory in [1]. This paper described explicitly the expressions for the generators of braided groups in the new higher rank-one quantum groups in these constructions, which are the q-commutators with the simple root vectors. These q-commutators are very important to the structure of new quantum groups. Reference | Related Articles | Metrics | Comments（0） Select Contrast structure of higher dimensional singularly perturbed  optimal control problem WU Li-Meng, NI Ming-Kang, LU Hai-Bo, ZHANG Juan Journal of East China Normal University(Natural Sc    2016, 2016 (1): 19-26.   DOI: 10.3969/j.issn.1000-5641.2016.01.003 Abstract （1047）   HTML （7）    PDF（pc） （366KB）（1002）       Knowledge map    Save In this paper, a class of linear high-dimensional singularly perturbed optimal control problem is discussed. By means of k+\sigma exchange lemma, we prove the existence\linebreak of contrast structure solution for the singularly perturbed optimal control problem. Meanwhile, by virtue of the direct scheme method which is based on boundary function method, we construct the uniformly valid formal asymptotic solution. Finally, an example is presented to illustrate the main results. Reference | Related Articles | Metrics | Comments（0） Select Cells of the weighted Coxeter group (C3,l6) YUE Ming-Shi Journal of East China Normal University(Natural Sc    2016, 2016 (1): 27-38.   DOI: 10.3969/j.issn.1000-5641.2016.01.004 Abstract （932）   HTML （12）    PDF（pc） （338KB）（1069）       Knowledge map    Save Let \alpha be a group automorphism of the affine Weyl group (\widetilde{A}_{2n},\widetilde{S}) with \alpha(\widetilde{S})=\widetilde{S}. Affine Weyl group(\widetilde{C}_n,S) can be seen as the fixed point set of the affine Weyl group (\widetilde{A}_{2n},\widetilde{S}) under its group automorphism \alpha. The restriction to \widetilde{C}_n of the length function \widetilde{l}_{2n} on \widetilde{A}_{2n} can be seen as a weight function on \widetilde{C}_n. In this paper, we give the description for all the left and two-sided cells of the specific weighted Coxeter group (\widetilde{C}_3,\widetilde{l}_6) and prove that each left cell in (\widetilde{C}_3,\widetilde{l}_6) is left-connected. Reference | Related Articles | Metrics | Comments（0） Select Jordan all-derivable points in upper triangular matrix algebras SUN Ai-Hui Journal of East China Normal University(Natural Sc    2016, 2016 (1): 39-42.   DOI: 10.3969/j.issn.1000-5641.2016.01.005 Abstract （977）   HTML （6）    PDF（pc） （187KB）（1059）       Knowledge map    Save Zhao and Zhu proved the following result: Every matrix in upper triangular matrix algebras over the complex number field is a Jordan all-derivable point. The aim of this paper is to show that every matrix in upper triangular matrix algebras over an infinite field of characteristic not 2 is a Jordan all-derivable point. Reference | Related Articles | Metrics | Comments（0） Select Optimality conditions and duality for a class of non-smooth fractional optimization problems WANG Guo-Dong, CHEN Lin Journal of East China Normal University(Natural Sc    2016, 2016 (1): 43-50.   DOI: 10.3969/j.issn.1000-5641.2016.01.006 Abstract （911）   HTML （10）    PDF（pc） （269KB）（1054）       Knowledge map    Save This paper studies a class of non-smooth multi-objective fractional optimization problems, using the tools in variational analysis and the generalized differential, and establishes necessary conditions and sufficient conditions under some new convexity. These results, which are relatively new in the study of non-smooth multi-objective fractional optimization problems, are characterized by limiting subdifferential. And the study of limiting subdifferential is a pretty hot subject in recent years. In addition, the weak duality and the strong duality results have been obtained in Mond-Weir type duality. Reference | Related Articles | Metrics | Comments（0） Select A Hilbert-type integral inequality with multi-parameters and composite kernel LIU Qiong, HUANG Lin Journal of East China Normal University(Natural Sc    2016, 2016 (1): 51-57.   DOI: 10.3969/j.issn.1000-5641.2016.01.007 Abstract （793）   HTML （7）    PDF（pc） （261KB）（1120）       Knowledge map    Save By introducing some special functions to characterize the constant factor, a Hardy-Hilbert type integral inequality with the kernel $\ln(1+\mathrm{e}^{-\alpha x^{\lambda_1}y^{\lambda_2}})$ is obtained, and its equivalent form is considered. The constant factors of the equivalent inequalities are proved being the best possible. Reference | Related Articles | Metrics | Comments（0） Select Research on the economic rationality of Hengsha new terminal ZHOU Yu, ZHU Jian-Hua, CHEN Jing-Chao Journal of East China Normal University(Natural Sc    2016, 2016 (1): 58-68.   DOI: 10.3969/j.issn.1000-5641.2016.01.008 Abstract （951）   HTML （8）    PDF（pc） （1787KB）（1294）       Knowledge map    Save Based on current situation of Shanghai Port, this paper focuses on the relationship between port and the development of city. First, data of port and GDP of city are analyzed making use of the linear regression model. Furthermore, the influence on economy in Shanghai after Hengsha new terminal is predicted.Considering the possible deviation in the linear model, however, a neural network model is established to forecast corresponding results. By the above quantitative analysis methods, Hengsha new terminal is expected to drive the development of related industries, bring economic benefits to some extent. In other words, Hengsha new terminal has positive and significant influence on development and construction of Shanghai. Reference | Related Articles | Metrics | Comments（0） Select Reliability analysis of Birolini's duplex system sustained by a non-priority unit in cold standby HUANG Kai, WU Qing-Tai Journal of East China Normal University(Natural Sc    2016, 2016 (1): 69-80.   DOI: 10.3969/j.issn.1000-5641.2016.01.009 Abstract （930）   HTML （10）    PDF（pc） （449KB）（1101）       Knowledge map    Save This paper deals with Birolini's duplex system sustained by a non-priority unit in cold standby. It is assumed that the life of the unit is exponential distribution, and the repair time of the unit is general continuous distribution. Then by using supplementary variables approach and generalized Markov process method, the Laplace transform of the reliability and the mean time to first failure are attained. Meanwhile, the availability and the failure frequency of the system are obtained. Reference | Related Articles | Metrics | Comments（0） Select The multiple Markov chains in random environments FEI Shi-Long Journal of East China Normal University(Natural Sc    2016, 2016 (1): 81-90.   DOI: 10.3969/j.issn.1000-5641.2016.01.010 Abstract （986）   HTML （6）    PDF（pc） （317KB）（1070）       Knowledge map    Save The multiple Markov chains in random environments were  introduced and several properties and application backgrounds of the multiple Markov chains in random environments  were given. An existence theorem on the multiple Markov chains in random environments was proved and several equivalent conditions of the multiple Markov chains in random  environments were presented Reference | Related Articles | Metrics | Comments（0） Select Bi-super-connected digraphs LI Jing-Jing, LIU Juan Journal of East China Normal University(Natural Sc    2016, 2016 (1): 91-95.   DOI: 10.3969/j.issn.1000-5641.2016.01.011 Abstract （1083）   HTML （7）    PDF（pc） （179KB）（974）       Knowledge map    Save A simple digraph D (without loops and multiple arcs) is said to be super-connected if every minimum vertex-cut is the out-neighbor set or in-neighbor set of a vertex. A super-connected digraph D is said to be bi-super-connected if there exists a minimum vertex-cut is both the out-neighbor set of a vertex and the in-neighbor set of a vertex. In this paper, we will give the necessary and sufficient conditions of line digraph is bi-super-connected, furthermore, we study the big super-connectivity of Cartesian product and lexicographic product of two digraphs. Reference | Related Articles | Metrics | Comments（0） Select Characterization of bipartite graph with maximum spectral radius NIU Ai-Hong, WANG Guo-Ping, QIN Zheng-Xin, MOU Shan-Zhi Journal of East China Normal University(Natural Sc    2016, 2016 (1): 96-101.   DOI: 10.3969/j.issn.1000-5641.2016.01.012 Abstract （943）   HTML （15）    PDF（pc） （262KB）（1053）       Knowledge map    Save The adjacency matrix A(G) of a graph G is the n\times n matrix with its (i,j)-entry equal to 1 if v_i and v_j are adjacent, and 0 otherwise. The spectral radius of G is the largest eigenvalue of A(G). In this paper we determine the graphs with maximum spectral radius among all trees, and all bipartite unicyclic, bicyclic, tricyclic, tetracyclic, pentacyclic and quasi-tree graphs, respectively. Reference | Related Articles | Metrics | Comments（0） Select The chromatic number for fork-free graphs WANG Xiao Journal of East China Normal University(Natural Sc    2016, 2016 (1): 102-106.   DOI: 10.3969/j.issn.1000-5641.2016.01.005 Abstract （786）   HTML （10）    PDF（pc） （201KB）（1208）       Knowledge map    Save Randerath once conjectured that every triangle-free and fork-free graph is 3-colourable. By a lemma, the conjecture for C_4-free graphs was proved.Moreover, the result that every triangle-free, C_4-free and C_{2,2,1,n}-free graph is (n+2)-colourable was proved as well, where C_{2,2,1,n} is the long handled fork with order (n+6) obtained from E-graph and P_n by joining the center vertex of E and one endvertex of P_n. Reference | Related Articles | Metrics | Comments（0） Select Terahertz extraordinary transmission from flexible C-shape split-ring resonators LUO Cong-Wen, ZHAO Zhen-Yu, SONG Zhi-Qiang, ZHAO Hong-Wei, HE Xiao-Yong, SHI Wang-Zhou, CHEN Zhi-Zhan Journal of East China Normal University(Natural Sc    2016, 2016 (1): 103-106.   DOI: 10.3969/j.issn.1000-5641.2016.01.014 Abstract （1039）   HTML （7）    PDF（pc） （2125KB）（1201）       Knowledge map    Save Polarization dependence of terahertz (THz) extraordinary transmission from a flexible C-shape split-ring resonance (C-shape SRR) is investigated. When the THz polarization is perpendicular to the gap of C-shape SRR, a single-peak resonance is observed owing to the inductive-capacitive (LC) resonance. When the THz polarization is parallel to the gap of C-shape SRR, a periodic multiple resonances phenomenon is observed. The simulation of the electric density distribution and surface current indicate that the asymmetric Fabry-P\'{e}rot effect of the C-shape SRR attributes to the periodic resonances. Reference | Related Articles | Metrics | Comments（0） Select Expression analysis of Brassica napus L. droughtrelated genes under drought stress HE Qiao-Li, ZHANG Zhe, RAN Chun-Yan, XIE Xiao-Yu Journal of East China Normal University(Natural Sc    2016, 2016 (1): 113-122.   DOI: 10.3969/j.issn.10005641.2016.01.015 Abstract （1109）   HTML （12）    PDF（pc） （2787KB）（1199）       Knowledge map    Save The high droughttolerant variety Holiday was treated as the experimental material under drought stress in the early flower stage. The expression level of 6 droughtrelated genes (ABA2、BnSOS2、BnCS、 CAM、CBF4、PIP1) which were selected from different organs (root, stem, leaf, flower and green pod) at different stress times (1,3,5,7 days) were analyzed by qRT PCR technology. The result showed that the expression of six droughtresistant genes in different organs all increased under drought stress, and they presented different trends respectively under different drought stress. In the same organs, the expression of the six droughtresistant genes had obvious different. In root, the maximum cumulative expression value gene was ABA2, and the minimum cumulative expression value gene was CBF4; in stem, the maximum was CAM, the minimum was CBF4; in leaf, the maximum was PIP1, the minimum was ABA2; in flower, the maximum was CBF4, the minimum was BnSOS2; in green pod, the maximum was BnCS, the minimum was CBF4. It suggested that different drought resistance pathway played〖JP2〗 different role under drought stress. The correlation analysis between expression values of droughtrelated genes and stress time showed that the expression quantity of CAM gene in the stem volume, CBF4 gene in the flowers was significantly positively related to the stress time. Reference | Related Articles | Metrics | Comments（0） Select Online sample focusing technique in capillary electrophoresisamperometric detection for biogenic amines WANG Guan, TANG Wan-Rong, GE Shu-Li, HAN Ruo-Bing, WANG Qing-Jiang, HE Pin-Gang, FANG Yu-Zhi Journal of East China Normal University(Natural Sc    2016, 2016 (1): 123-133.   DOI: 10.3969/j.issn.1000-5641.2016.01.016 Abstract （770）   HTML （7）    PDF（pc） （2662KB）（974）       Knowledge map    Save An online focusing method, based on fieldenhanced sample injection coupled with transient moving substitution boundary, was developed for the separation and capillary electrophoresis(CE)amperometric detection (AD) of biogenic amines under acidic conditions for the first time. The proposed method was based on the substitution reaction between 18crown6bonded biogenic amine complexes and Na+ cations at the substitution boundary. By using this method, electrode fouling was prevented in electrochemical detection. The factors affecting extraction efficiency, separation, and detection were investigated. Under the optimum conditions, the limits of detection of five analytes in a sample, which was prepared in a lowconductivity matrix, ranging from 2.2 to 9.8 nmol/L (signaltonoise ratio, S/N＝3), and about 160 to 300fold enhancement in concentration was achieved compared to the conventional CEAD method. This method has great potential for the detection of biogenic amines. Related Articles | Metrics | Comments（0） Select Journal of East China Normal University(Natural Sc    2016, 2016 (1): 134-.   Abstract （578）   HTML （5）    PDF（pc） （857KB）（764）       Knowledge map    Save Related Articles | Metrics | Comments（0） Select A review of the studies on melanin synthesis and whitening products YE Xi-Yun, ZHU Ping-Ya Journal of East China Normal University(Natural Sc    2016, 2016 (2): 1-8.   DOI: 10.3969/j.issn.1000-5641.2016.02.001 Abstract （1212）   HTML （31）    PDF（pc） （777KB）（1401）       Knowledge map    Save Due to environmental pollution and the increasing size of the ozone hole, more UV rays penetrate the atmosphere and reach the ground, which leads to skin pigmentation abnormalities. In this article, we reviewed the latest studies on melanin synthesis, mainly focusing on the regulation and related signal pathways with regard to tyrosinase, a vital rate-limiting enzyme involved in this process. Several critical factors affecting melanin synthesis were also presented, providing theoretical basis for screening melanin inhibitors. In addition, several new popular commercial whitening products and their property were discussed. All these information is benificial to draw the public’s attention to skin pigmentation disorder as well as proper care. Reference | Related Articles | Metrics | Comments（0） Select  Effcient characterization for M{2,3},M{2,4} and M{2,3,4}and Mf2;3;4g  ZHENG Dao-Sheng Journal of East China Normal University(Natural Sc    2016, 2016 (2): 9-19.   DOI: 2016.02.002 Abstract （631）   HTML （92）    PDF（pc） （246KB）（1003）       Knowledge map    Save In this paper, by {\it selecting inverse image index method}, an efficient characterization formula from set ${\mathbb{A}}_{1}=\{\alpha:\alpha=(I_s,\eta^{\rm T})^{\rm T}\in \Bbb C^{n\times s}_s\}$ onto set ${\mathbb{B}}_1=\{\beta:\beta=\alpha(\alpha^*\alpha)^{-1}\alpha^*, \alpha\in{\mathbb{A}}_1\}$ is given. Besides, it is shown that each element of $I\{2,3\}_s$ is permutation similar to an element of ${\mathbb{B}}_1$. Then efficient characterization formulas for $I\{2,3\}$ and $M\{2,3\}$ are obtained respectively. An interesting thing is ${\mathbb{B}}_1$ is a dense subset of $I\{2,3\}_s$. The fact that $I\{2,3\}_s=I\{2,4\}_s=I\{2,3,4\}_s$ enables us to obtain the efficient characterization formulas for $M\{2,4\}$ and $M\{2,3,4\}$ fluently. Algorithm 3.1 may be used to compute elements of $I\{2,3\}_s$ and to avoid the repeated computation work. Reference | Related Articles | Metrics | Comments（0） Select Support vector machine in the primal space based on\\ the ramp loss function\\[6mm YUAN Yu-Ping, AN Zeng-Long Journal of East China Normal University(Natural Sc    2016, 2016 (2): 20-29.   DOI: 2016.02.003 Abstract （660）   HTML （5）    PDF（pc） （521KB）（1127）       Knowledge map    Save Aiming at the problem of standard support vector machine being sensitive to the noise, a new method of support vector regression (SVR) machine based on dissymmetry quadratic and controlled-insensitive loss function is proposed. Using the concave and convex process optimization and the smooth technology algorithm, the problem of non-convex optimization is transformed into the problem of the continuous and twice differentiable convex optimization. Using the Amijo-Newton optimized algorithm of finite iteration termination, the established optimization model is solved, and the convergence of the algorithm is analyzed. The algorithm can not only keep the sparse nature of support vector, but also control the abnormal values of the training sample. The results of theexperiment showed that the support vector regression machine model proposed kept good generalization ability, and the model could fit better both the simulated data and the standard data. Compared with the standard support vector machine (SVM) model, the proposed model not only can reduce the effects of noise and outliers, but also has stronger robustness. Reference | Related Articles | Metrics | Comments（0） Select A note on the commutativity of {C}^*-algebras JIANG Run-Liang Journal of East China Normal University(Natural Sc    2016, 2016 (2): 30-34.   DOI: 2016.02.004 Abstract （692）   HTML （9）    PDF（pc） （164KB）（1056）       Knowledge map    Save There are many characterizations for commutative C^*-algebras. In this note, we prove that a C^*-algebra $\mathcal{A} is not commutative if and only if there is a C^*-subalgebra \mathcal{B} in \mathcal{A}'' (the enveloping Von Neumann algebra of mathcal{A}) such that mathcal{B} is-isomorphic to mathrm M_2(\mathcal{\textbf{C}}). In terms of this result, we can recover some characterizations for the commutativity of C^-algebras appeared before. Reference | Related Articles | Metrics | Comments（0） Select Existence of time-dependent global attractors for plate equations LIU Ting-Ting, MA Qiao-Zhen Journal of East China Normal University(Natural Sc    2016, 2016 (2): 35-44.   DOI: 2016.02.005 Abstract （583）   HTML （8）    PDF（pc） （300KB）（1023）       Knowledge map    Save The concept of time-dependent global attractors was recently presented by Di Plinio, Temam et al.~By using the skill of the operator decomposition, the asymptotic compactness of a family process \{U(t,\tau)\} corresponding to the plate equations with the coefficient dependent on time was proved,~and then the existence of time-dependent global attractors as well as the regularity were obtained under the condition that f satisfies the critical exponent growth Reference | Related Articles | Metrics | Comments（0） Select Reliability coefficient of star complex system ZHANG Qi-Bin, SHA Xiao-Cong, WANG Na, XU Hui-Ping, MA Ji Journal of East China Normal University(Natural Sc    2016, 2016 (2): 45-50.   DOI: 2016.02.006 Abstract （459）   HTML （8）    PDF（pc） （300KB）（849）       Knowledge map    Save The reliability coefficients play an important role in the reduction of complex systems to a linear combination of parallel subsystems. This paper defines a new complex system, namely, star-k-out-of-n:F system, and calculates the reliability coefficients of this system Reference | Related Articles | Metrics | Comments（0） Select List improper coloring of graphs of nonnegative characteristic XU Yang Journal of East China Normal University(Natural Sc    2016, 2016 (2): 51-55.   DOI: 2016.02.007 Abstract （462）   HTML （9）    PDF（pc） （174KB）（1029）       Knowledge map    Save A graph G is called (k,d)^*-choosable if, for every list assignment L with |L(v)|=k for all v\in V(G), there is anL$-coloring of G such that every vertex has at most d neighbors receiving the same color as itself. Let G be a graph embedded in a surface of nonnegative characteristic. In this paper, we prove that if G is a 2-connected graph, which contains no 5-cycles, adjacent 3-faces and adjacent 4-faces, then G is (3,1)^*-choosable Reference | Related Articles | Metrics | Comments（0） Select Minimum fundamental cycle basis of (n-2)-regular bipartite graphs with order 2n HE Chang-Xiang, LIU Wei-Long Journal of East China Normal University(Natural Sc    2016, 2016 (2): 56-61.   DOI: 2016.02.008 Abstract （645）   HTML （6）    PDF（pc） （264KB）（1052）       Knowledge map    Save Let G be an (n-2)- regular bipartite graph with order 2n. In this paper, we constructed a fundamental cycle basis of G and proved this basis is a minimum fundamental cycle basis. For any minimum fundamental cycle basis, we also determined the structure of the spanning tree corresponding to it. Reference | Related Articles | Metrics | Comments（0） Select An effective localization attack in locationbased social network WANG Rong-Rong, XUE Min-Hui, LI Xiang-Xue, QIAN Hai-Feng Journal of East China Normal University(Natural Sc    2016, 2016 (2): 62-72.   DOI: 10.3969/j.issn.1000-5641.2016.02.009 Abstract （925）   HTML （7）    PDF（pc） （1642KB）（1481）       Knowledge map    Save Locationbased social network (LBSN) services enable users to discover nearby people. Original LBSN services provide the exact distances for nearby users. Existing studies have shown that it is easy to localize target users by using trilateration methodology. To defend against the trilateration attack, current LBSN services adopt the concentric bandbased approach when reporting distances. In this paper, by using number theory, we analytically show that by strategically placing multiple virtual probes as fake GPS, one can accurately pinpoint user locations with either accurate or coarse bandbased distances. As a proof of this concept, WeChat is examplified to validate that our attack methodology is effective in a realworld deployment. Our study is expected to draw more public attention to this serious privacy issue and hopefully motivate better privacypreserving LBSN designs. Reference | Related Articles | Metrics | Comments（0） Select A novel orientation sensing method based on\\RFID technology GUO Feng-Ming, LI Bing, HE Yi-Gang, Journal of East China Normal University(Natural Sc    2016, 2016 (2): 73-80.   DOI: 2016.02.010 Abstract （583）   HTML （7）    PDF（pc） （548KB）（1072）       Knowledge map    Save It is critical to sense orientation of target objects for radio frequency identification (RFID) applications, such as supply chain, equipment management, and so on. Based on the principles of ultra high frequency radio frequency identification (UHF RFID) and the theory of antenna scattering, a link budgets model of RFID is provided. Utilizing the technology of RFID and polarization diversity, a novel method for sensing the orientation is presented. The method requires standard RFID equipment and assumes that each object is attached by two RFID tags. Based on the received signal strength of the tag reply, orientation of the target object is obtained by using of a simple statistical estimator. The performance of the method proposed is evaluated via experimental measurements, and the results show that the mean estimated error of orientation sensing is 10.1^{\circ} Reference | Related Articles | Metrics | Comments（0） Select Climate change and droughtflood disasters responses in South China WANG Wen-Jing, YAN Jun-Ping, LIU Yong-Lin, CAO Yong-Wang Journal of East China Normal University(Natural Sc    2016, 2016 (2): 81-89.   DOI: 10.3969/j.issn.1000-5641.2016.02.011 Abstract （855）   HTML （6）    PDF（pc） （2978KB）（1411）       Knowledge map    Save According to the meteorological data of 80 stations in South China, influences of different disaster inducing factors on climate change were analyzed, using MannKendall test method, standardized precipitation index, the wavelet analysis, to explore the trend of drought and flood under global warming background. The results showed that: (1) In the last 54 years, the annual average temperature was 19.95 °C in South China, with a linear tendency being 0.17 °C/10a. The abrupt change of average annual temperature occurred in 1993. (2) The precipitation in South China was increasing with the speed of 8.775 mm/10a. After the abrupt change of temperature，the temperature increased fast, while the precipitation decreased rapidly. The colding and wetting in spring changed to warming and wetting; the warming and drying in autumn changed to warming and wetting; the warming and wetting in winter changed to warming and drying.(3) According to the amount of annual precipitation, South China area was divided into two regions: the average annual precipitation in Yunnan province was increasing along the latitude direction from north to south; the average annual precipitation in the other provinces were increasing along the longitude direction from east to west. (4) The flood increased and drought reduced after the abrupt change of temperature. The frequency of flood increased in some areas, while the frequency of drought reduced in space. Therefore, the overall climate change presented a warming and wetting trend. Reference | Related Articles | Metrics | Comments（0） Select Responses of runoffsediment flux and bedform in the Middle Yangtze River to the completion of the Three Gorges Dam YUAN Wen-Hao, LI Mao-Tian, CHEN Zhong-Yuan, YIN Dao-Wei, WEI Tao-Yuan Journal of East China Normal University(Natural Sc    2016, 2016 (2): 90-100.   DOI: 10.3969/j.issn.1000-5641.2016.02.012 Abstract （999）   HTML （10）    PDF（pc） （2996KB）（1255）       Knowledge map    Save Comparation methods are used to examine the responses of hydrosediment and river bedform after the completion of the Three Gorges Dam. Data are based on the historical data of runoff and sediment discharge (1950—2013) and insite measured data of depth and bedload (2003, 2011).  The results demonstrate that the average annual discharge at Yichang and Hankou stations has decreased 10.1% and 7.2% after the Three Gorges Dam completion. The average annual sediment flux of the Yichang and Hankou stations decreased from 556 and 402 Mt/a to 60 and 150 Mt/a, accounted for 89.5% and 62.2% of that have been trapped by the Three Gorges Dam. In addition, the average annual medium diameter of suspended sediment at Yichang and Hankou stations has decreased from 35 \mm and 25 \mm to 4 \mm and 15 \mm, but the bed load has become coarser and coarser. The depth at the thalweg has also increased to 0.4～3.7 m due to the bed erosion after the Three Gorges Dam impoundment. Reference | Related Articles | Metrics | Comments（0） Select Observation and analyses of transport and diffusion of warm discharge water from the power plants near Shidongkou in the Changjiang Estuary ZHANG Shen-Yu, ZHU Jian-Rong Journal of East China Normal University(Natural Sc    2016, 2016 (2): 101-111.   DOI: 10.3969/j.issn.1000-5641.2016.02.013 Abstract （743）   HTML （9）    PDF（pc） （6468KB）（983）       Knowledge map    Save The transport and diffusion of warm discharge water from the power plants near Shidongkou in the Changjiang Estuary were analyzed based on the observation data from November 23 to December 2 in 2014. During the spring tide, in terms of the longitudinal distribution of water temperature, warm discharge water from the power plants was evident, and had the maximum water temperature rise of 4.1oC in ebb tide, and of 5.1oC in flood tide; water temperature was stratification only near the discharge port, and trended to vertical uniform in other area due to strong mixing induced by tidal current. In terms of horizontal distribution of water temperature and water temperature rise, water temperature was higher along the coast and lower away from the coast, and reached the maximum value of 4.0oC near the discharge ports of Huaneng Shidongkou power plants during the ebb tide. The warm discharge water was transported and diffused downstream along the coast forced by the ebb current and Coriolis force. Compared during ebb tide, the higher temperature water near the Shidongkou move upstream and farer away the coast during flood tide, the maximum water temperature rise reached to 4.2oC. In terms of current speed and direction, water temperature measured at the continuous sites, water temperature rise during flood tide if the measured sites located in the upper reaches of the power plant, and descend during ebb tide if the measured sites located in the lower reaches of the power plant, was influenced distinctly by the near warm discharge water from the power plants. The more the measured site closer to discharge port of power plant, the higher the water temperature was, and the more obvious the vertical variation was. During the neap tide, water temperature was lower than during spring tide due to the passage of the cold front and heat loss at the river surface, the maximum water temperature near the power plant appeared at the middle water layer. The distribution characteristic of warm water rise was similar to the one during spring tide. The maximum warm water rise reached to 5.0oC which was higher 0.8oC than the one during spring tide because the tidal current and mixing was weaker during neap tide, and the higher temperature water near the warm water discharge port was not easy to be outward transport and diffusion. Reference | Related Articles | Metrics | Comments（0） Select Numerical simulation about temporal and spatial variations of overtopping flow flux at the south leading jetty in the deep waterway project of the Changjiang Estuary XU Peng, GE Jian-Zhong, DING Ping-Xing, FU Gui Journal of East China Normal University(Natural Sc    2016, 2016 (2): 112-127.   DOI: 10.3969/j.issn.1000-5641.2016.02.014 Abstract （777）   HTML （8）    PDF（pc） （7882KB）（1165）       Knowledge map    Save A numerical model based on the insitu measured topographic data was implemented, using the unstructuredgrid, threedimensional primitive equation, finitevolume coastal ocean model (FVCOM) including a dikegroyne module, for the study of temporal and spatial variations of overtopping flow at the south leading jetty constructed in the deep waterway channel. We investigated the temporal and spatial changes of overtopping flow by computing crosssection water flux before and after the project. The hydrodynamic condition around the north passage showed noticeable changes after the building of dikes and groynes. After the construction, respectively, net lateral current between the two channels points to the north passage with a relatively large amount of discharge. As estimated, spatially varying unit width net overtopping water flux had a significant feature, which was bounded at the corner, showed that the flux increased gradually at the upper half and decreased at the latter with a larger value. On a time scale the amplitude appeared no remarkable changes seasonally but on the other hand paced periodically in a tidal cycle. Moreover, the results showed a strong linear correlation between net water flux and tidal level. Reference | Related Articles | Metrics | Comments（0） Select Design and application of saltwater intrusion forecastingsystem in the Changjiang Estuary TAO Ying-Jia, GE Jian-Zhong, DING Ping-Xing Journal of East China Normal University(Natural Sc    2016, 2016 (2): 128-143.   DOI: 10.3969/j.issn.1000-5641.2016.02.015 Abstract （850）   HTML （16）    PDF（pc） （13824KB）（1050）       Knowledge map    Save Based on a highresolution and wellvalidated FVCOM model, a saltwater intrusion forecasting system in the Changjiang Estuary has been set up.A WRF model is also applied to predict the wind speed and direction in the Changjiang Estuary and its adjacent sea. The forecasting system can forecast threedimensional spatial distribution of salinity in the Changjiang Estuary at each moment during the following three days (72 hours).The forecasting system downloads the forcing data, runs the WRF and FVCOM model, visualizes prediction results and publishes the results. All the above operations are automatically processed by computer.The system was validated by hindcasting salinity of two stations, which are Baozhen and Chongxi at South Branch, during January 2011. The comparison of salinity between system hindcasted value and observation show the system is reliable. The system, with advantages of convenient operation and automatic procession, forecasts the saltwater intrusion in the Changjiang Estuary easily and timely. Reference | Related Articles | Metrics | Comments（0） Select Ultrasensitive detection of protein biomarker using fluorescent quantum dot probes WU Si-Min, JIA Chun-Ping, LIU Li-Fen, GAO Wan-Lei, JING Feng-Xiang, Jin-Qing-Hui , ZHANG Hong-Feng, ZHAO Jian-Long- Journal of East China Normal University(Natural Sc    2016, 2016 (2): 144-152.   DOI: 10.3969/j.issn.1000-5641.2016.02.016 Abstract （941）   HTML （7）    PDF（pc） （2643KB）（702）       Knowledge map    Save In this study, based on the unique properties of quantum dots (QDs) and immune magnetic beads, an fluorescent assay was built to detect low concentration carcinoembryonic antigen (CEA). The assay was carried out in a sandwich formation in which two antibodies simultaneously recognized two separate binding sites on the same target CEA. After enrichment with magnetic separator, the fluorescent intensities produced by the QDs, which were confined to the surface of the beads, could be read efficiently to quantify the concentration of the CEA. For this assay, the limit of detection was 38 pg/mL with the linear range was from 0.39 to 50 ng/mL, and it has been proved with high accuracy and repeatability in tumor marker control. With the high sensitivity, specificity and low sample consumption, this method takes a big step to the early diagnosis of diseases. Reference | Related Articles | Metrics | Comments（0） Select New records for alien  plants in Shanghai LI Hui-Ru, WANG Yuan, MA Jin-Shuang Journal of East China Normal University(Natural Sc    2016, 2016 (2): 153-159.   DOI: 10.3969/j.issn.1000-5641.2016.02.017 Abstract （791）   HTML （99）    PDF（pc） （3115KB）（1199）       Knowledge map    Save Ten new alien species belonged to ten genera and nine families, are recorded in Shanghai, including Rumex maritimus L., Chenopodium acuminatum Willd., Aubrieta deltoidea (L.) DC., Trifolium resupinatum L., Malva pusilla Sm., Anagallis arvensis L., Verbena bonariensis L., Leonurus macranthus Maxim., Stachys arvensis L.and Panicum miliaceum L.. Among them, A.deltoidea (L.)DC. and T.resupinatum L. are new record for alien plants in China. Reference | Related Articles | Metrics | Comments（0） Select Effect of redox condition on metal transformation in urban river sediments ZHANG Mi, WEN Bo, HUANG Ling-Xia, DU Jing, DENG Hong- Journal of East China Normal University(Natural Sc    2016, 2016 (2): 160-.   DOI: 10.3969/j.issn.10005641.2016.02.018 Abstract （940）   HTML （13）    PDF（pc） （2640KB）（1231）       Knowledge map    Save The sediments from Yinchu Lake and Liwa River were studied for the effects of redox changes on Zn and Fe transformation. A simulated experiment was conducted with 4 different redox treatments：aerobic (+O), anaerobic (-O), aerobic then anaerobic (+O→-O) and extensively anaerobic (--O). Compared with anaerobic condition (-O), percentage of oxidizable Fe decreased from 5.53% to 4.60% in the sediment from Yinchu Lake under aerobic condition, while reducible and residual Fe increased from 13.77% to 16.20% and from 81.08% to 83.49%, respectively. Furthermore, the concentration of Fe release in the supernatant was decreased. Percentage of Zn in acid extractable, reducible and FeMn oxides fraction were respectively declined from 30.14% to 29.16%, from 25.40% to 23.90% and from 35.73% to 32.72% in the sediment from Yinchu Lake. However, Zn in residual fraction rose from 32.73% to 35.92% after treated with oxygenenation, which decreased the concentration of Zn release in the supernatant. It indicated that Fe and Zn in FeMn oxides fraction and organic matter fraction had good corrections with each other. Our study would provide scientific basis for risk analysis and evalution on eutrophicated urban river in the process of ecological restoration. Reference | Related Articles | Metrics | Comments（0） Select A linear compact scheme for the nonlinear Schr"odinger equation with wave operator LI Xin, ZHANG Lu-Ming, CHAI Guang-Ying, Journal of East China Normal University(Natural Sc    2016, 2016 (3): 1-8.   DOI: 2016.03.001 Abstract （1298）   HTML （10）    PDF（pc） （363KB）（3008）       Knowledge map    Save In this paper, a linear compact finite difference scheme is proposed for the nonlinear Schr"odinger equation with wave operator (NLSEWO). Thus, the periodic initial value problem of the NLSEWO is solved. The unconditional stability and convergence in maximum norm with order O(h[4]+tau[2]) are proved by the prior estimations and the energy method. Those theoretical results are demonstrated by a numerical experiment. Reference | Related Articles | Metrics | Comments（0） Select High order interpolation function for surface contact problem FENG Yun-Qing, HOU Lei Journal of East China Normal University(Natural Sc    2016, 2016 (3): 9-20.   DOI: 2016.03.002 Abstract （1226）   HTML （72）    PDF（pc） （1924KB）（2738）       Knowledge map    Save This paper mainly adopts Lagrange bicubic shape function to construct interpolation function and uses finite element method to solve the coupling equations of surface contact. The Lobatto points are used to construct the interpolation nodes to avoid the Runge phenomenon. Higher shape functions and  two different numerical integration methods are adopted to improve the accuracy of the numerical solution. According to the above analysis, this article uses Matlab program to simulate the deformation and stress changes in surface contact problem. Reference | Related Articles | Metrics | Comments（0） Select vec  estimates of solutions to the Cauchy problem of[2mm] one-dimensional convection-diffusion equations ZENG Yan, XIN Gu-Yu Journal of East China Normal University(Natural Sc    2016, 2016 (3): 21-26.   DOI: 2016.03.003 Abstract （1313）   HTML （10）    PDF（pc） （250KB）（2613）       Knowledge map    Save This paper investigated the  estimates of solutions to one-dimensional convection-diffusion equations frac{partial c}{partial t}+ufrac{partial c}{partial x}=Dc_{xx}+c_{xt}-(c{2})_{x}, using Green's function method, frequency decomposition and energy estimates. We found that the decay rate of the solution is the same as that for heat fusion operator Reference | Related Articles | Metrics | Comments（0） Select A class of singularly perturbed weakly nonlinear boundary\\[2mm] value problems with interface conditions WU Cheng-Long Journal of East China Normal University(Natural Sc    2016, 2016 (3): 27-38.   DOI: 2016.03.004 Abstract （1315）   HTML （7）    PDF（pc） （284KB）（2502）       Knowledge map    Save In this paper we study a class of weakly nonlinear boundary value problems with interface conditions. By means of the Schauder fixed point theorem we establish the theorem about a weakly nonlinear boundary value problem with interface conditions. By the method of boundary layer function, the formal asymptotic solution is constructed, which is used to prove the existence of the solution Reference | Related Articles | Metrics | Comments（0） Select Bogdanov-Takens bifurcation for a delayed predator prey system with stage structure LIU Xia, JIAO Jian-Feng Journal of East China Normal University(Natural Sc    2016, 2016 (3): 39-47.   DOI: 2016.03.005 Abstract （1306）   HTML （9）    PDF（pc） （294KB）（2476）       Knowledge map    Save In this paper the Bogdanov-Takens (BT) bifurcation of a delayed predator prey system with stage structure and constant harvesting is considered. The existing conditions which guarantee an interior equilibrium of the system is BT singularity are obtained and the corresponding normal form for the system at this singularity is presented, some bifurcation results are shown Reference | Related Articles | Metrics | Comments（0）