Table of Content

    25 March 2019, Volume 40 Issue 2
    Mathematics
    Proof of Sufficient Conditions for Brachistochrone Problem Solution
    XING Jiasheng,YANG Yichuan
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  1-4. 
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    Brachistochrone problem being changed to the problem of functional minimum value,direct and simple proof is then given that the functional critical point is the point of the functional minimum value and the functional critical point has uniqueness.

    Groups with Few Noncentral Conjugacy Classes
    LUAN Shujing,YU Hang,HE Liguo
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  5-7. 
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    We classify the  finite groups whose noncentral conjugacy class number is between 6 and 9  also classify the finite groups whose noncentral conjugacy class number is 10 with solvable socle.

    Uniform Stochastic Continuity of Two-Parameter Stochastic Processes
    LIU Danhua,YANG Chanjuan
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  8-10. 
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    The rectangular increment of two-parameter stochastic processes with the uniform stochastic continuity is proved to converge probabilistically to 0 on arbitrary small rectangular square with left side half open.

    Numerical Algorithm for a Class of Quasi Linear Problems Based on Natural Boundary Element Method
    GAO Zhiyu,YAO Xuechun
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  11-15. 
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    Based on the principle of natural boundary reduction,the non overlapping domain decomposition algorithm (Dirichlet-Neumannalternating algorithm) is used to study the quasi linear equations in the long strip region.First,the natural integral equation on the elliptical artificial boundary is obtained;and then,the corresponding iterative algorithm is constructed.According to the characteristics of nonlinear operators,the convergence of the algorithm in continuous and discrete cases is proved,and the corresponding numerical examples are given to illustrate the feasibility of the method.

    Credibility Recursive Model Based on Mlinex Loss Function
    ZHAO Zhen,BI Fengxiao
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  16-20. 
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    A credibility recursive model is established by replacing the square loss function with Mlinex loss function.The credibility premium of the (t+1)th year is the weight of the tth year's claim,the tth year's credibility premium and the collective premium.This model is proved to give larger weight to the claims of more recent years and less weight to the claims of more distant years.

    Computer
    Finite-Time Recursive Neural Network for Quadratic Minimization Problems
    ZHANG Yongsheng,XIAO Lin
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  21-26. 
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    A recursive neural network model is utilized for solving the quadratic minimization problem,and a sign-bi-power activation function is added to the network model,which speeds up the convergence  of the recursive neural network even to reach the finite-time convergence.Moreover,by adjusting the value of the designing parameter λ,the convergence performance of the recursive neural network can be further improved.Finally,the MATLAB is used to simulate and verify the recursive neural network model,and the numerical simulation results verify the effectiveness and superiority of the proposed finite-time recursive neural network model for solving the quadratic minimization problem.

    Application of Graph Coloring Algorithm Based on Ant Colony Optimization in Intelligent Community
    WEI Juan
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  27-30. 
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    Using the graph coloring algorithm based on  ant colony optimization,we can solve the problem of  chaotic information produced by  ant colony algorithm when dealing with too many colors and reduce the chromatic number through decoloring process with parameter Max to realize four-coloring.As  a result,dynamic data and information of a community can be clearly presented in the graph grid.

    Adaptive Genetic Algorithm for Optimization of  Athlete Pairing
    DUAN Mingxiu,LI Yu,LAI Pengfei,LIAO Jiaqi
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  31-33. 
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    An adaptive genetic algorithm with convergence factor and process factor is used to optimize athlete pairing,which effectively improves the convergence speed of the algorithm while maintain the diversity of the population and global convergence.Experimental results show that this method can improve the  solving speed and solve the larger scale problem quickly.

    Biological
    A New Species of Cyprinus from Yunnan,China:Cyprinus (Cyprinus) Bajiangensis
    LI Weixian
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  34-36. 
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    This paper describes a new species of the genus Cyprinus,Cyprinus (cyprinus) bajiangensis Li sp.nov.,which was collected from the Bajiang in Lunan County (now Shilin County) of Yunnan,China in October,1965.This new species was once mistaken for cyprinus(cyprinus) yunnanensis Tchang,1993.
    The new species is similar to C. yunnanensis in the pair of maxillary barbels but differs in the following features:①normal head (vs. pointed and long head);② U-shaped mouth in end position (vs. oblique-fissure mouth in sub-up position);③P.i-19~20(vs. i-16);④head length in interorbital width 2.50~2.63 (vs. 3.4~4.2);⑤scales row above lateral line 5 (vs. 6~7),scales row below lateral line 4 (vs. 5~6);⑥body depth in standard length 3.00~3.04 (vs.3.5~4.0).

    Analysis and Evaluation of Nutritive Composition of the Leaves from Trichosanthes Kirilowii Maxim
    WU Shuailin,CHEN Ya,LI Gui,CHEN Gongxi,XIONG Lizhi
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  37-41. 
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    Nutrient components and the contents of mineral elements in leaves of Trichosanthes kirilowii Maxim have been analyzedand compared with leaves of seven common vegetables.The results showed that the respective content of protein,crude fibre,Vit C,ash,water was 28.53%,5.95%,0.67%,10.70%,80.87%.As for the mass ratio,content of mineral elements of K,Mg,P,Zn,Fe,Cu,Mn respectively was 1 737.71 mg/100 g,446.07 mg/100 g,804.20 mg/100 g,3.45 mg/100 g,19.61 mg/100 g,2.48 mg/100 g,5.62 mg/100 g.The leaves of Trichosanthes kirilowii Maxim are showed to have rich nutrition and various nutritional components,which showed its high edible and nutritive value,especially of the protein,crude fiber,Vit C,K,Mg,P.

    Chemistry and chemical engineering
    Electrochemical Reduction of CO2 at Copper Nanoparticles Cathode in Ionic Liquid BMIMBF4:Synthesis of Dimethyl Carbonate
    YUAN Chuping,LI Sue,ZHANG Yuting,FENG Qiuju,LIU Suqin
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  42-48. 
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    New catalysts are needed to achieve lower overpotentials for desirable products during the electroreduction of CO2.In this study,copper nanoparticles were obtained by electrochemical method.These obtained electrodes were characterized by XRD,SEM and TEM.The electrochemical properties of the obtained electrode for electrocatalytic reduction of  CO2 in the ionic liquid,1-butyl-3-methylimidazolium- tetrafluoborate (BMIMBF4),have been evaluated by cyclic voltammogram and potentiostatic electrolysis.Results showed that,the reduction peak of  CO2 appeared at -1.7 (vs. Ag) which was more positive 0.1 V than that obtained on copper electrode,meanwhile,the current density was 12 mA higher.In addition,the electrolysis experiments have been carried out under mild conditions without any toxic solvents,catalysts and supporting electrolytes,affording the dimethyl carbonate in 87% yield.

    Preparation of Tannin-Immobilized on Adlocellulose Resin and Its Adsorption for Berberine Hydrochloride
    ZHOU Peng,PENG Pingying,YUAN Hua,PENG Zhiyuan,ZHONG Xin
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  49-54. 
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    Tannin-immobilized on aldocellulose resin was prepared by the phenolic reaction of tannin immobilized on aldocellulose,where aldocellulose was prepared by the oxidation of cellulose with sodium periodate.The adsorption properties of tannin-immobilized on aldocellulose resin for berberine hydrochloride were investigated.At 298 k,the adsorption capacity of berberine hydrochlorid tannin-immobilized on aldocellulose resin was 143.66 mg/g when the concentration of berberine hydrochloride was 300 mg/L,and the adsorption ratio of berberine hydrochloride on tannin-immobilized on aldocellulose resin was higher than 91.64 % when the mass concentration of berberine hydrochloride was lower than 50 mg/L.The adsorption for berberine hydrochloride of equilibrium experiments and kinetics studies fitted well with the Langmuir model and Pseudo-first-order model,respectively.The amount of berberine hydrochloride adsorbed by the tannin-immobilized on aldocellulose resin did not decrease significantly after  4 times of reusing.

    Research Progress of Lithium Titanium Phosphate as Anode Material for Aqueous Lithium Ion Battery
    LIU Lu,JIANG Zhen,LIU Na,HE Zhangxing
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  55-59. 
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    In this paper,the structure,principle,characteristics,development status of aqueous lithium ion battery,and the characteristic oftitanium phosphate lithium as anode material are introduced.The research progress oftitanium phosphate lithium is discussed through summarizing the modification methods such as specialstructure modification,lattice doping,introducing effective conductive agent.Moreover,the development prospect of titanium phosphate lithium is elaborated.

    Characteristic column:Study on Wuling Mountain Area
    Public Cultural Service in Wuling Mountainous Area,Chongqing
    LIU Anquan
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  60-66. 
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    In recent years,three aspects of significant achievements in rural public cultural services in Wuling Mountainous Area of Chongqing have been obtained:in the rural public cultural services distribution of facilities and system construction,inheritance of intangible cultural heritage,and development of characteristic cultural industries.However,there are still outstanding problems such as single and insufficient input channels,weak and low utilization of infrastructure,uneven urban and rural services,low professional level and inability to adapt to the changing characteristics of rural public cultural needs.It is necessary to construct the modern system of of public cultural service,establish multiple supply  bodies,discover and cultivate the outstanding traditional culture of the region with strong characteristics,and foster talents.

    Factors Influencing Reproductive Health of Women of Child-Bearing Age in Xiangxi Rural Areas
    WANG Rui,DU Jianlin,LUO Xuemei,LUO Jiashun,LIANG Nan
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  67-72. 
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    In order to explore the main  factors influencing the reproductive health of rural  women of child-bearing age in Xiangxi,women  aged 20~49 in Xiangxi rural areas were randomly selected,and their reproductive health status was investigated.Direct action of PLS path model found that age,education,individual knowledge,individual attitude,individual behavior,family factors and community factors are the important influential factors.The indirect action of PLS path model obtained three influencing paths with individual knowledge,individual attitude and individual behavior as endogenous latent variables.It is suggested that publicity of reproductive health knowledge should be strengthened and the quality and efficiency of the community health service should be promoted.

    Research Report on Poverty Alleviation in Jishou City
    YANG Huaying
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  73-78. 
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    The current situation and problems of poverty alleviation in Jishou City have been investigated.Accordingly,measures are proposed:strengthen information support,improve poverty alleviation industries,increase professional training,develop the regional features,focus on the poverty limit,establish supervisory mechanism,and resettle the poverty-stricken residents.

    Economics
    Construction of C2C E-Commerce Delivery Model Based on "Cloud Logistics"
    MA Xiaoqian
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  79-83. 
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    The ddlivery mode of C2C e-commerce based on "cloud logistics" regulates and manages logistics intelligently by integrating the  capacity and resources of logistics units,so as to break through the bottleneck of current C2C e-commerce  logistics and improve the delivery efficiency of distribution.

    Enterprise Production Planning Based on Linear Programming
    YANG Wumei,LIU Taowen
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  84-87. 
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    For enterprises to arrange multi-variety and small-batch production and  to achieve profit maximization,a general model of production planning is proposed by means of linear programming,and the model transformation and solving are carried out on the basis of reasonable assumptions.In addition,the concrete examples are calculated and analyzed by MATLAB software.Compared with the results by the WPS programming tool,this model is verified to be feasible and effective.

    Education
    Correlation Analysis on Curriculum for Area-Targeted Normal Student
    LI Hongyi,OU Zujun
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  88-92. 
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    The academic performance of the area-targeted normal students from the Normal College of Jishou University is researched in this paper.Firstly, the single factor correlation analysis was conducted on the professional basic courses and the research courses,and  the correlation between any two courses was obtained.Secondly,canonical correlations analysis was used to study the correlations between the basic courses and the search courses.The results obtained  provide reference for curriculum setting optimization.

    Curriculum System Construction for National Defense Education in Colleges and Universities
    WANG Qunli
    Journal of Jishou University(Natural Sciences Edition), 2019, 40(2):  93-96. 
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    Strengthening the construction of national defense education curriculum system has significant implication for
     teaching reform,curriculum system construction and the discipline basis.In order to construct the national defense education curriculum system in colleges,it is necessary to accurately grasp the overall requirements of the system,scientifically construct a complete system,and focus on the key problems in the national defense education curriculum system.

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