Table of Content

    25 May 2018, Volume 39 Issue 3
    Mathematics
    Characterization of Convergence of a Class of Series with Positive Terms and Its Applications
    XU Shaoyuan
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  1-4. 
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    We prove the characterization of the convergence of a class of series with positive terms can be conducted by the convergence of a relevant monotone positive sequence.Based on some  questions in the preliminary contest of National College Student Mathematics Competitions and some questions in the  "mathematical analysis" of the graduate entrance examination,some examples are provided to illustrate the applications of the results in solving the problems of series convergence.

    Notes on the Properties of Normal Matrices
    HE Ruiqin,REN Fangguo
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  5-8. 
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    Based on the basic properties and the existing results of normal matrices,and according to the relation between eigenvalues and singular values of matrices,the equivalent conditions for and the algebraic properties of normal matrices are obtained.

    Some New Criteria for Nonsingular H-Matrices
    ZHANG Linjuan,MO Hongmin
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  9-13. 
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    By making use of the element properties of α-diagonally dominant matrix and adding the appropriate parameters,we present a set of determination conditions for nonsingular H-matrix and verify the effectiveness of the method  by numerical examples.

    Prediction of Stock Index Based on Fractal Interpolation and SVM
    LI Hong,WANG Hongyong
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  14-19. 
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    In order to better analyze and predict the short-term trend of stock index time series,we propose a new method to determine the free parameters of fractal interpolation,and establish an improved fractal interpolation model.This model is the combined with the support vector machine model to establish a mixed prediction model.The daily closing data of Shanghai composite index is selected as the research object which is shown to have long-range dependence thorugh R/S analysis.The time series of Shanghai composite index are analyzed and predicted by the mixed prediction model.The empirical results show that and the new mixed model proposed in this paper has good fitting performance and  higher  accuracy in short-term prediction.

    Computer
    Improved MCL Algorithm for Mobile Nodes in Workshop Based on RSSI
    LIU Xiaoyuan
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  20-24. 
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    Aiming at the deficiencies in localization accuracy and sampling efficiency of Monte Carlo wireless sensor networks,an improved Monte Carlo localization algorithm based on RSSI is proposed to locate the mobile nodes in the workshop.By analyzing the moving rules of mobile resources in workshop,RSSI model is introduced to predict range,reduce sampling area,and improve sampling efficiency and positioning accuracy.The simulation results show that the improved Monte Carlo localization algorithm based on RSSI improves the localization accuracy,convergence speed and computational complexity.

    Application of AES Algorithm in Communication Security System of Smart Home
    JIANG Zhiguo
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  25-30. 
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    In view of the cybersecurity problems such as malicious attacks,privacy leaks and identity theft  in the process of data communication of smart home system,this paper puts forward a communication security system based on encryption algorithm.AES encryption algorithm is adopted for the system encryption design,which can effectively resist the loss of static password,pseudo-server attacks and other security threats,and can enhance the confidentiality of the system,thus making data transmission of smart home system more secure.

    Physics
    Band Structure Calculation of Piezoelectric Phononic Crystal by Finite Element Method
    WU Jien,HU Ruixia,DENG Ke
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  31-34. 
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    Calculation of the band structure for piezoelectric phonons based on the finite element software COMSOL Multiphysics is introduced in detail.The effects of different shunt circuits on the band structure of piezoelectric phonons are then discussed.Finally,some common errors that are easy to occur in energy band calculation are enumerated,and the corresponding solutions are given.

    Manipulation of the Electronic Band Structure of Monolayer MoS2 in Presence of Exchange Field and Off-Resonant Light
    ZHANG Xincheng,LIAO Wenhu
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  35-40. 
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    Utilizing the low energy effective Hamilton model from the tight-binding approximation,we have  investigated the electronic band structure of the monolayer MoS2 in the presence of magnetic exchange field and off-resonant circularly polarized light.The obtained results show that,the magnetic exchange field can break and/or modulate the spin degeneracy of the conduction and/or valence bands,and the band gaps around K point of the monolayer MoS2 increase with the external off-resonant circularly polarized light induced effective energy;while those around K′ increase firstly and then decrease with the light field induced effective energy,realizing the transition of semiconductor-metal-semiconductor.Therefore,the two-dimensional MoS2 can be tuned to be new bandgap materials with excellent spin and optoelectrical properties.

    Physical Characteristics of One Carbon Phenolic Material Under High-Speed Symmetric Loading
    ZHU Zhigang,ZENG Yuefei,GAO Ge,LI Yongchi
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  41-44. 
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    Free surface velocity of the carbon phenolic material is obtained based on the symmetrical loading technology of one-stage light gas gun.The high-pressure state properties of carbon phenolic material under high speed symmetrical loading are then discussed;at the same time,Hugoniot curve and Griineisen state equation for the carbon phenolic material are established.The experiment results show that Griineisen coefficients is negatively sensitive with improvement of the particle velocity.

    Electrical
    Cascading Failure Propagation of the Interdependent Power-Information Network with Recovery Mechanism
    TAN Xin,LUO Yanbin
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  45-51. 
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    In order to study the cascading failure propagation  of the power-information network  with recovery mechanism,the IEEE300 node system power network and double-star structural power-information network are established based on the dependency network theory.Calculation of complex network statistic parameters show that both power grid and information network have small-world effect and scale-free network property.Based on the model of the cascading failures of the power-information network,a robustness analysis of three different interdependent networks including BA,WS and ER is conducted,and a model of cascading failure propagation of interdependent network with recovery mechanism is proposed.The simulation results show that the the recovery level of dependency recovery mechanism is higher than the target and the random recovery mechanism.This advantage increases with the decrease of the failure threshold.

    Biological
    Chemical Analysis of Seed Oil from Abelmoschus Manihot by GC-MS
    ZHU Manxiang,ZHENG Jie,WANG Jianxia,LIU Yihan,TIAN Yungang,GUO Hongwei,WEI Hua,
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  52-54. 
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    GC-MS technology was used for chemical analysis of seed oil from Abelmoschus manihot.Eleven chemical constituents were identified in the seed oil.Among these,the content of oleic acid was 43.8%,the content of linoleic acid was 26.3%,and the content of palmitic acid was 17.2%.Unsaturated fatty acid content is very rich,accounting for 78.6% of the total oil.

    Two New Species of Sinocyclocheilus from Guangxi,China
    WU Zhiluan,LI Chunqing,LAN Chun,LI Weixian
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  55-59. 
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    Sinocyclocheilus simengensis Li,Wu,Li et Lan sp. nov. (Fig. 1).The upper side of the head is concave in the new species,with two protuberances,it similar with S. bicornutus (Xingren,Guizhou) and S. furcodorsalis (Tian'e,Guangxi),but the two protuberances of the new species are shorter,not triangular (Fig. 2).
    Sinocyclocheilus pingshanensis Li,Li,Lan et Wu sp. nov. (Fig. 3).The new species is distinguished from all its congeners by the following characteristics:the morphological,distribution and last unbranched ray of dorsal fin with no serrations along the posterior edge,scale size along lateral line is similar with that of scales above and below lateral line. The new species is similar with S. macrolepis,S. guilinensis and S. jii,but it can be differentiated from S. macrolepis by last unbranched ray of dorsal fin hard (vs. soft),Scale row above lateral line 19~22 (vs. 11~14),Scale row below lateral line 11~13 (vs. 5~6);differentiated from S. guilinensis by last unbranched ray of dorsal fin hard (vs. soft),Scales along lateral line 75~78 (vs. 43~53),Scale row above lateral line 19~22 (vs. 19~20),Scale row below lateral line 11~13 (vs. 11~12);differentiated from S. jii by last unbranched ray of dorsal fin hard (vs. soft),Scales along lateral line 75~78 (vs. 47~52),Scale row above lateral line 19~22 (vs. 27~29),Scale row below lateral line 11~13 (vs. 15~17).

    Chemistry
    Structure of the Cobalt-Based Oxide and Its Catalytic Performance in Oxidation of Toluene
    HU Xiuzhen,JIANG Chongwen,ZHU Jundong,LONG Jie,SONG Quzhi
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  60-68. 
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    Cobalt-based oxides A-Co (A=Cu,Mn,Ce) and pure cobalt oxide prepared by using sol-gel method have been tested for toluene oxidation.It is found that all binary cobalt-based oxides showed higher catalytic performance in the oxidation of toluene than pure cobalt oxide.The most efficient catalyst was Ce-Co with t10 and t90 (the temperature required for achieving 10% and 90% conversion of toluene,respectively) values of 221 and 238 ℃,respectively.In addition,the stability of the Ce-Co oxide was evaluated at 99% of toluene conversion at 240 ℃ for 50 hours.The characterization techniques of X-ray diffractometry,nitrogen adsorption-desorption,scanning electron microscope,H2 temperature programmed reduction and X-ray photoelectron spectroscopy were used to explain the improved catalytic performance.The results indicated that Ce4+/Ce3+ and Co3+/Co2+ redox couples in the Ce-Co catalyst facilitated the mobility of oxygen and improved the reducibility of surface oxygen accounting for the synergetic effect in the oxidation of toluene.

    Synthesis and Fluorescence Properties of the Tb(N-HPA)3(TPPO)2 Complex
    WANG Ying,MA Dongyun,HAN Ziyue
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  69-71. 
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    The rare earth complex of Terbium,N-HPA and TPPO (N-HPA:N-phenylanthranilic acid;TPPO:Triphenylphosphine oxide ) was synthesized,and its structure was characterised by elemental analysis,UV and IR spectra.The effect of the second ligand on the complex fluorescence was studied.The result proved that the addition of the second ligand TPPO can effectively increase the luminescence intensity of terbium icons.The ternary complex of terbium,N-HPA,TPPO has good fluorescence.

    Simple Synthesis of Pharmaceutical Intermediates  of β-Halogenated Phenethylamine
    YU Jian,LI Zengzeng,JIANG Ting,LEI Qian,SHENG Huixiang,GUAN Mengdan,HOU Kun,YUAN Li,LI Pei,LI Ling,TANG Shi
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  72-75. 
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    A highly efficient and simple method for the synthesis of pharmaceutical intermediates of β-halogenated phenethylamine has been developed.Using ethyl bromoacetate and dibenzylamine as starting material,the desired ethyl 2-acetamido-3-chloro-3-(4-methoxyphenyl)propanoate was synthesized through sequential substitution,addition,catalytic hydrogenation,chlorination and acylation.The strategy provides a convenient way for natural products and pharmaceutical molecules containing multifunctional structural units of ethylamine.The reaction conditions were optimized and the optimum synthetic route was determined.Moreover,the target product was characterized by melting point,H NMR and 3C NMR.

    Characteristic column.Study on Wuling Mountain Area
    Residents' Perception of Benefits of Por-Poor Tourism for Poverty-Stricken Areas:A Case of Dehang Scenic Spot
    CHEN Nanxi,HUANG Wei,WU Yongqing
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  76-81. 
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    To evaluate the social,cultural,economic,and environmental effects of tourism in the work of poverty alleviation,a questionnaire was conducted in the Dehang scenic spot and the results was analyzed through SPSS.The results showed that poverty-stricken areas can quickly get rid of poverty by developing tourism which has a positive impact on the local economy and social culture.Residents' perceptions of and attitudes towards pro-poor tourism are different due to the different demographic characteristics.

    Performance Assessment of Poverty Alleviation Through Tourism in Zhangjiajie
    CHEN Yanhong,TANG Yexi,LONG Minglu,ZHANG Rujiao,CHENG Can,ZHOU Yajin,ZHUO Qi
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  82-86. 
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    A system of performance assessment of poverty alleviation through tourism in Zhangjiajie is established which comprises of three levels of criteria,including economic performance,social performance,and ecosystem performance,and 22 indicators.AHP is used to determine the weights of assessment indexes,the quantitative model methods is applied to assess and sort the performance of tourism poverty alleviation in the two  districts and counties of Zhangjiajie,and ArcGIS 10.2 is employed to produce gain the performance grading zoning map.The results show that the performance of tourism poverty alleviation in Zhangjiajie is significant,and the performance score of tourism poverty alleviation is above 60 points,but the performance difference between regions is obvious.The differences in the tourism  income per capita,the incidence of poverty and energy consumption per unit of GDP are the main factors that cause the regional performance differences.This paper puts forward some suggestions to improve economic performance,social performance and ecological performance.

    Mapping
    Measurement of Geometric Similarity in Map Generalization
    LIU Yang,ZHANG Jingying
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  87-91. 
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    This paper presents an approach for the measurement of geometric similarity in map generalization from the point of view of geometric change.In this approach,five basic elements are first put forward,including conventional spatial distance,Hausdorff distance,Area of symmetric difference,Turning function distance and Surface distance.Quantitative indicators are further developed to measure these five elements.Finally,the implementation of the measurement of the geometric similarity is provided to illustrate the rational of the proposed approach.

    Gardens
    Implications of Spatial Arrangement and Landscaping  of the Jichang Garden for Modern Garden Design
    WANG Binyi
    Journal of Jishou University(Natural Sciences Edition), 2018, 39(3):  92-96. 
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    This paper analyzes and makes a summary of the merits of Jichang Garden in spatial arrangement and landscaping,thus offers implications for modern garden design.

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