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25 January 2016, Volume 2016 Issue 1 Previous Issue    Next Issue

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Review and perspective: Function of intestinal microbiota in aquatic animals ZHANG Mei-Ling, DU Zhen-Yu 2016, 2016 (1):  1-8.  doi: 10.3969/j.issn.10005641.2016.01.001 Abstract ( 1681 )   HTML ( 22 )   PDF (864KB) ( 1935 )   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. References | Related Articles | Metrics

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the q-commutators of braided groups HU Hong-Mei 2016, 2016 (1):  9-18.  doi: 10.3969/j.issn.1000-5641.2016.01.002 Abstract ( 1090 )   HTML ( 146 )   PDF (289KB) ( 1009 )   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. References | Related Articles | Metrics

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Contrast structure of higher dimensional singularly perturbed  optimal control problem WU Li-Meng, NI Ming-Kang, LU Hai-Bo, ZHANG Juan 2016, 2016 (1):  19-26.  doi: 10.3969/j.issn.1000-5641.2016.01.003 Abstract ( 874 )   HTML ( 7 )   PDF (366KB) ( 986 )   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. References | Related Articles | Metrics

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Cells of the weighted Coxeter group (C3,l6) YUE Ming-Shi 2016, 2016 (1):  27-38.  doi: 10.3969/j.issn.1000-5641.2016.01.004 Abstract ( 771 )   HTML ( 12 )   PDF (338KB) ( 1058 )   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. References | Related Articles | Metrics

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Jordan all-derivable points in upper triangular matrix algebras SUN Ai-Hui 2016, 2016 (1):  39-42.  doi: 10.3969/j.issn.1000-5641.2016.01.005 Abstract ( 843 )   HTML ( 6 )   PDF (187KB) ( 1044 )   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. References | Related Articles | Metrics

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Optimality conditions and duality for a class of non-smooth fractional optimization problems WANG Guo-Dong, CHEN Lin 2016, 2016 (1):  43-50.  doi: 10.3969/j.issn.1000-5641.2016.01.006 Abstract ( 820 )   HTML ( 10 )   PDF (269KB) ( 1041 )   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. References | Related Articles | Metrics

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A Hilbert-type integral inequality with multi-parameters and composite kernel LIU Qiong, HUANG Lin 2016, 2016 (1):  51-57.  doi: 10.3969/j.issn.1000-5641.2016.01.007 Abstract ( 708 )   HTML ( 7 )   PDF (261KB) ( 1107 )   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. References | Related Articles | Metrics

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Research on the economic rationality of Hengsha new terminal ZHOU Yu, ZHU Jian-Hua, CHEN Jing-Chao 2016, 2016 (1):  58-68.  doi: 10.3969/j.issn.1000-5641.2016.01.008 Abstract ( 869 )   HTML ( 8 )   PDF (1787KB) ( 1277 )   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. References | Related Articles | Metrics

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Reliability analysis of Birolini's duplex system sustained by a non-priority unit in cold standby HUANG Kai, WU Qing-Tai 2016, 2016 (1):  69-80.  doi: 10.3969/j.issn.1000-5641.2016.01.009 Abstract ( 845 )   HTML ( 10 )   PDF (449KB) ( 1089 )   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. References | Related Articles | Metrics

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The multiple Markov chains in random environments FEI Shi-Long 2016, 2016 (1):  81-90.  doi: 10.3969/j.issn.1000-5641.2016.01.010 Abstract ( 879 )   HTML ( 6 )   PDF (317KB) ( 1055 )   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 References | Related Articles | Metrics

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Bi-super-connected digraphs LI Jing-Jing, LIU Juan 2016, 2016 (1):  91-95.  doi: 10.3969/j.issn.1000-5641.2016.01.011 Abstract ( 1008 )   HTML ( 7 )   PDF (179KB) ( 958 )   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. References | Related Articles | Metrics

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Characterization of bipartite graph with maximum spectral radius NIU Ai-Hong, WANG Guo-Ping, QIN Zheng-Xin, MOU Shan-Zhi 2016, 2016 (1):  96-101.  doi: 10.3969/j.issn.1000-5641.2016.01.012 Abstract ( 876 )   HTML ( 15 )   PDF (262KB) ( 1046 )   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. References | Related Articles | Metrics

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The chromatic number for fork-free graphs WANG Xiao 2016, 2016 (1):  102-106.  doi: 10.3969/j.issn.1000-5641.2016.01.005 Abstract ( 743 )   HTML ( 10 )   PDF (201KB) ( 1195 )   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. References | Related Articles | Metrics

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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 2016, 2016 (1):  103-106.  doi: 10.3969/j.issn.1000-5641.2016.01.014 Abstract ( 908 )   HTML ( 7 )   PDF (2125KB) ( 1184 )   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. References | Related Articles | Metrics

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Expression analysis of Brassica napus L. droughtrelated genes under drought stress HE Qiao-Li, ZHANG Zhe, RAN Chun-Yan, XIE Xiao-Yu 2016, 2016 (1):  113-122.  doi: 10.3969/j.issn.10005641.2016.01.015 Abstract ( 1004 )   HTML ( 12 )   PDF (2787KB) ( 1160 )   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. References | Related Articles | Metrics

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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 2016, 2016 (1):  123-133.  doi: 10.3969/j.issn.1000-5641.2016.01.016 Abstract ( 708 )   HTML ( 7 )   PDF (2662KB) ( 964 )   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