Table of Content

    25 May 2017, Volume 38 Issue 3
    Mathematics
    Counting of One Kind of Special Permutation
    TANG Baoxiang,REN Han
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  1-3. 
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    We have calculated the k combination f(2m,k)=f(2(m-1),k)+f(2(m-1),k-1)+f(2(m-2),k-1) of asynchronously appearing i and i+1,j and j+3,where m∈{1,2,3…},i∈{1,2,…,2m-1},j∈{1,3,5,…,2m-3},in the set S={1,2,…,2m}.Making use of inclusion and exclusion principle,we have sloved the question that they are disconnectly i element's and i+1 element's n permutation p(n)=n!+∑〖DD(〗n-1〖〗i=1〖DD)〗((-1) if (2(n-1),i)(n-i)!),where n∈{4,5,6,…},i∈{1,2,…,n-1},in the set N={1,2,3,…,n}.

    On the Hybrid Mean Value of the Smarandache Double-Factorial Function
    LU Weiyang,GAO Li
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  4-7. 
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    The elementary method and analytic method were performed to study the mean value problem of hybrid function (Sdf(n)-P(n))β and δα(n)(Sdf(n)-P(n))β involving the Smarandache double-factorial function Sdf(n) and the largest prime factor divisor function P(n),where δα(n) denotes the divisor function.Two sharper asymptotic formulas were proposed.

    Decay Estimates of Solutions to the Semi-Linear Plate Equation with Memory
    WU Xuehui,LIU Yongqin
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  8-12. 
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    The initial value problem of the semi-linear plate equation with memory in multi-dimension Rn(n≥1) is studied.In the Fourier space,we obtain the decay estimates of solutions to the linear problem.And through introducing a set of time-weighted Sobolev  spaces and applying the contraction mapping theorem,we obtain the global in-time existence and the optimal decay estimates of solutions to the semi-linear problem under smallness assumption on the initial data.

    Electronics
    Piezoelectric Ceramic Bimorph in Bending Vibration
    HE Xiping,LI Qiang
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  13-18. 
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    Based on the small deflection bending vibration theory,the general displacement solution and the resonant frequency equation for a piezoelectric ceramic bimorph are derived.Meanwhile,the resonant frequencies of the piezoelectric ceramic bimorph are calculated by finite element method (FEM).A piezoelectric ceramic bimorph is manufactured and its resonant frequencies are measured.It  shows that the tested resonant frequencies are almost in good agreement with ones by analytical and FEM methods.It manifests the effectiveness of the presented theory for design of a PCB in this work.

    An Optimized Variable Structure Anti-Lock Braking Controller
    WANG Bo,DING Fang,ZENG Yuanxin
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  19-24. 
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    For the chattering problem of variable structure control based on exponential reaching law,a variable structure control based on improved exponential reaching law has been proposed and applied in the design of ABS controller.MATLAB/Simulink modeling and simulation have been employed to verify the effectiveness of the proposed controller on single road and variational road.The results show that the variable structure control based on improved exponential reaching law can effectively reduce the chattering and keep the robustness and quick response capability of the conventional variable structure control.

    Portable Measurement of Ice Skate Blade
    HUANG Dongzhao,ZHAO Qiancheng
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  25-30. 
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    Aiming at the deficiency of the current measurement and reconstruction method for skate-blade based on radian meter,a portable measurement method has been proposed to solve the contradiction between precision and portability of measurement apparatus.Devices including a displacement sensor,a rotary encoder,a data acquisition card and so on,have been applied to build a portable measurement apparatus.The experimental results indicate that the method and the apparatus have basically achieved portable and high precision measurement of skate-blade.

    Computer and Information
    Novel Neural Network for Dynamic Matrix Moore-Penrose Inverse
    XIANG Qiuhong,LIAO Bolin,MA Chuan
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  31-35. 
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    A novel neural network model (termed NNN model) is proposed,which is composed of a conventional gradient neural network (GNN) and the recently proposed Zhang neural network (ZNN).In the same conditions,NNN,GNN and ZNN are applied for solving the dynamic matrix Moore-Penrose (M-P) inverse.The theoretical analyses demonstrate the efficacy and superiority of the proposed NNN model,and the computer-simulation results show that the NNN model has good robustness against noise.

    Design of Sewage Treatment Control System Based on Industrial Ethernet
    BAI Jin,BAO Jian
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  36-39. 
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    With the advanced industrial ethernet communication technology,the proposed sewage treatment control system is composed of the process control level,the field control level and the local control level,which can realize the centralized management,decentralized control and resource sharing.This system is cost-saving and efficient,and thus has certain practical value in sewage treatment.

    Application of Big Data in Animation Industry
    WEI Sanqiang
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  40-45. 
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    Big data,as an innovative technology in IT industry following cloud computing and Internet of things,has penetrated into all aspects of social development.With the successful formation of the Chinese animation data platform,big data will be applied to all aspects of the animation industry chain.Big data can provide important technical support in the animation movie recommendation system,the integration of the animation industry chain to achieve maximum value,animation industry restructuring,integration,transformation and upgrading.The integration of "big data+animation" development model will produce fundamental change in the future pattern of the animation industry.

    Biological
    Phylogenetic Evolution of DELLA Gene Family in Angiosperms
    HUA Nan,MENG Ying,CHU Zhaofu,NIE Zelong
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  46-54. 
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    Based on the representative DELLA protein sequences from angiosperms,we analyzed the phylogenetic evolution of DELLA gene family in angiosperm.A duplication event is found in the early diversification of the DELLA genes in dicotyledons which split into two large branches,each representing the rosids and asterids respectively.While the monocotyledon did not undergo an early replication event,and all the DELLA genes clustered together to form a single clade.In addition,a third group of DELLA genes is found in dicotyledon.

    Effects of Auxin and Its Transport Inhibitors on Spore Germination in Ceratopteris Pteridoides
    PENG Yi,LIU Lu,LI Guisheng
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  55-59. 
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    The effects of auxin and its transport inhibitors on germination ratio of Ceratopteris pteridoides spores have been explored.The results showed that IAA,NPA,TIBA,and BFA all could repress the spore germination.However,IAA reduced the inhibition conferred by NPA and TIBA,and the NPA inhibition and the IAA antagonism was uncovered acting at  different germination stages.This study suggested that auxin and its transport inhibitors in Ceratopteris pteridoides  have affected cytoskeleton and even vesicle transportation resulting in key events during spore germination such as gravity sensing and nuclear migration are compromised.

    Extraction Conditions and Determination of Antibacterial Activity in Vitro of Konjac Glucomannan
    XIONG Wuguo,LI Taibing,LI Jiaxing,DENG Chong,HUANG Cheng
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  60-63. 
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    The extraction conditions of konjac glucomannan by ethanol precipitation method and its antibacterial activity in vitro have been studied with the konjac powder used as raw material.The effects of the solid to liquid ratio,pulp temperature,ethanol concentration and washing times on the yield of konjac glucomannan were firstly studied through single factor experiements.And then,the optimum extraction conditions were obtained through orthogonal experiment.Lastly,in vitro antibacterial activity of konjac glucomannan was determination by the tube double gradient dilution method.The results showed that the optimum extraction conditions of konjac glucomannan were as follows:solid to liquid ratio was 1∶175 (g∶mL),pulp temperature was 60 ℃,the ethanol concentration was 50%(v/v),and twice washing.In these conditions,the konjac glucomannan rate reached 65.7%.The konjac glucomannan showed different levels of inhibition for staphylococcus aureus and escherichia coli.It is then concluded that konjac is rich in glucomannan and it has the antibacterial activity,which makes it widely applicable in medicine and food industry.

    Chemistry
    Adsorption of Tannin-Based Phenolic ResinModified by Resorcinol for Caffeine
    ZOU Ting,ZHOU Qian,YUAN Hua,ZHANG Qianan,SU Wanli,PENG Zhiyuan
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  64-68. 
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    Tannin-based phenolic resin modified by resorcinol was prepared from Acacia mangium tannin.The adsorption property of resin for caffeine was investigated.The results showed that the adsorption performance of tannin-based phenolic resin was improved by the modification with resorcinol.The adsorption capacity decreased with the increase of the temperature,and the adsorption process was exothermic.The isothermal adsorption of phenolic resin for caffeine was in agreement with the Freundlich isotherm equation.Pseudo-second-order kinetic model can be used to interpret the adsorption kinetics.

    Synthesis of Fluorinated Isoquinoline-1,3-Dione via Light-Catalysis Addition and Cyclization of Alkenes
    ZHANG Qian,WANG Qiong,DENG Youlin,WANG Shuowen,YUAN Li,WU Yiting,TANG Shi
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  69-75. 
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    A synthesis of fluorinated isoquinoline-1,3-diones via light catalyzing activated alkenes addition reaction was developed.Through light catalysis,various N-alkyl-N-methacryloylbenamides derivatives underwent radical cascade addition cyclization reaction with perfluorobutyliodide and ethyl bromodifluoroacetate.A series of fluorinated isoquinoline-1,3-diones derivatives with potential physiological activity was compounded in 67%~80% yields.This study provides a green efficient approach to afford fluorinated isoquinoline-1,3-dione under mild conditions.

    Characteristic column.Study on Wuling Mountain Area
    Practice and Implications of Songbai Model for Targeted Poverty Alleviation Through Financial Measures
    ZHANG Yongliang
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  76-80. 
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    In order to better understand the effects of targeted poverty alleviation through financial measures,a field research on the credit system in Songbai Town,Yongshun County of Hunan Province has been conducted.It has been found that the Songbai Model can not only benefit the poor farmers,but help raising capital for the enterprises and make more credit available to the financial institution as well,achieving all-round winning and making the local economy more dynamic.This financial model of targeted poverty alleviation provides answers to the questions of who,what,how,and how effective.

    Targeted Poverty Alleviation in Wulingshan Area:Measures in Jishou City
    YANG Huaying
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  81-85. 
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    An intensive and comprehensive investigation of targeted poverty alleviation in Jishou City has been conducted.Some problems have been discovered,and the advices for solving the problem of regional poverty have been proposed.

    Economics
    Mean-Semi-Variance-Entropy Optimal Portfolio
    SUN Quande,DENG Xue
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  86-90. 
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    Firstly,we compare the mean-variance model using variance to measure risk,the mean-absolute-deviation model using the absolute deviation to measure the risk,and the mean-semi-variance model using the semi-variance to measure the risk.The comparison shows that with the same return,the semi variance as the risk measurement is most consistent with the psychology of investors.Then we employ the entropy to construct the mean-semi-variance-entropy model.The analysis of a numerical example shows that our proposed model is more comprehensive for it is concerned with all kinds of uncertain factors in the stock market,and can provide more secure investment plans for the investors.

    Spatial Complementary Construction for Tourism Resource Difference in the Yangtze River Economic Belt
    DU Yumin
    Journal of Jishou University(Natural Sciences Edition), 2017, 38(3):  91-96. 
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    Based on the complementary analysis of tourism resources in the hub cities of the Yangtze River economic belt,the paper proposes to construct the tourism linkage with the city group led by Shanghai as the head section in the Yangtze River delta,the city group led by Wuhan as the body section in middle reaches of the Yangtze River,and Chengdu-Chongqing city group as the end section.In addition,in this linkage,the city group in central Yunnan and Guizhou function as the supplement,the capital cities as the node,and the prefecture cities as the complement,so that harmonious tourism development in the Yangtze River economic belt can be achieved.

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