Table of Content

    25 March 2016, Volume 37 Issue 2
    New Findings about the Distribution Density of Quadratic Residue
    HUANG Yiru,HUANG Jian,TAN Fuping,ZHANG Chaohui,WANG Peikang
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  1-5. 
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    We established a wonderful theorem about 2-partition on three circles when researching the Vander Waerden Number.Based on the theorem,we revealed a new law of quadratic residue:for prime number p,about p/4 quadratic residues or quadratic nonresidues are isolated points;in addition,about p/4 have the interval length of at least 2.

    Semiprime Modules and Reduced Modules
    LI Dongfang,LI Qisheng
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  6-10. 
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    The properties of several classes of zero-insertive modules and semi-prime modules are discussed. It is proved that the flat modules over a classical completely semi-prime (respectively zero-insertive) ring is classical completely semi-prime (respectively zero-insertive).Several characterizations of reduced modules and left duo-rings are obtained.Let M be a left R-module,it is shown that if M is symmetric then M/Z(M) is reduced,where Z(M) is the singular submodule of M;if M is  regular then M is reduced if and only if it is Abelian.

    On the Eigenvalues of a Class of Second Order Ordinary Differential Operators
    LIU Yong,BAI Yunwen
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  11-14. 
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    In this paper,we estimate the eigenvalues of a class of second order ordinary differential operators using power series and numerical methods.

    Several Fekete-Szeg Inequalities About Non-Bazilevicˇ Functions
    GUO Dong,LI Zongtao
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  15-18. 
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    An analytical function class N(α,μ,A,B) is introduced.By using the extremum of function and monotonicity,the sharp upper bounds of  |a3-μa22|  for any complex parameter are discussed,which generalize some existing results.

    Phase Constrained Least Square Solutions of the Equation AX=B
    ZHAO Linlin,ZHANG Lihua,LIU Yanqin
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  19-21. 
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    By using the Moore-Penrose inverse and the structural properties of the phase constraints,the phase constrained least square solutions of the matrix equation AX=B with two different phase constraints have been studied.

    Physics and electronics
    Double Negative Acoustic Metamaterials Based on a Soft Slid Plate and Hollow Steel Cylinders
    DENG Ke,SONG Zonggen,ZHAO Heping
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  22-25. 
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    A water-immersed epoxy plate injected with periodical steel columns is designed to achieve negative-dynamic-mass response,which arises from the collective excitation of surface modes in the plate.A slit hollow steel cylinder immersed in water is designed as a Helmholtz resonator to achieve negative bulk modulus.By combining these two designed structures together,an acoustic metamaterial simultaneously possessing a negative mass density and bulk modulus is realized.Compared to previous realized three-dimensional double negative metamaterials,this two-dimensional double negative metamaterial is much easy to be fabricated.

    Self Recharging Algorithm for Indoor Mobile Robot
    HUANG Ying,ZHAO Han,LI Gao
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  26-29. 
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    Auto-recharging is always a key technology in mobile robots field.To solve the problems of complexity,high cost and small directoring coverage,this paper proposes a high efficient method,which combines IR directoring and bright laser line directoring by utilizing image recognition technology,to recharge the mobile robots no more than 2 meters away.Through the automatic recharging experiments in the lab,this method is proved to be a high efficient algorithm.

    Physics and electronics
    Method of Airborne Passive Ranging Based on Centrifugal Acceleration Information
    WANG Chunmei,QIAO Liang
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  30-32. 
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    Airborne passive ranging technology is one of the important research fields in the major military powers.To guarantee the effectiveness of  passive ranging algorithm for airborne detector to ground target,this paper considers the method of airborne passive ranging based on centrifugal acceleration information.The ranging precision and observability of the method is discussed,and corresponding computer simulations have been done to prove the correctness of the method.

    Spread Spectrum Digital Watermarking Scheme Based on Fountain Code and Human Vision System in Contourlet Domain
    CHEN Liuyang,LU Rongbo,TENG Juan
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  33-37. 
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    In order to better select the suitable embedding position and embedding strength in the Contourlet domain,the visual masking based on the Human Visual System(HVS)for Contourlet Transform is proposed.We use this visual masking in the Contourlet domain to select the appropriate embedding strength and embedding position and embed the watermark information,thus improving the invisibility of watermarking scheme.The watermark image is pre-processed by using the fountain code to be encoded,which increases the security and the decoding rate.We use spread spectrum watermarking technology to enhance the ability of watermarking scheme to resist common watermark attacks,which improves the robustness of the watermarking scheme.Experimental results show that the proposed scheme has higher invisibility and robustness compared with the common watermarking scheme,and the security is also improved.

    Biological and chemical
    Screening and Identification of High Butanedione-Yielding Bacterial Strain
    SU Guirong,ZHOU Lulu,YI Langbo,PENG Qingjing,PENG Qingzhong
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  38-42. 
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    To obtain the high butanedione-yielding bacterial strain,41 strains of bacteria isolated from traditional Tujia bacon were screened by way of V-P color reaction and 1,2-diaminobenzene colorimetric method.The isolated strains were identified by bacterial morphological,physiological and biochemical characteristics,and phylogenetic relationships based on 16S rRNA gene sequences.It was found that 7 strains of bacteria could produce higher content of butanedione,of which strain BCL-8 had the highest yield of butanedione.When strain BCL-8 had been fermented in glucose and peptone medium for 20 hours,butanedione content in fermentation liquor was determined to be 68.9 mg/L.Strain BCL-8 was identified as Bacillus licheniformis based on its morphological,physiological and biochemical characteristics,and 16S rRNA gene sequences analysis.The results showed that strain BCL-8 is a superior butanedione-producing microorganism.

    Experiment of Pressure Swing Adsorption of  CO2/CH4 at Low Temperature Through Coconut Shell Activated Carbon
    LIU Xuewu,DU Baoguo,WU Jintao,WANG Xiaojuan,ZOU Jiupeng
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  43-46. 
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    The natural gas purification technology through pressure swing adsorption (PSA) at low temperature was proposed based on the low temperature processing and the conventional PSA technology applied in liquefied natural gas storage and transport.Coconut shell activated carbon was used for the static adsorption of CO2 and CH4 component gas and the dynamic simulation of adsorption separation of binary mixed CO2/CH4  gas.At  -30~25 ℃,the static volumetric method was used to investigate adsorption behavior of CO2 under the pressure from 1.2~2.5 MPa and that of CH4 under the pressure from 0~4 MPa,respectively.The results showed that the adsorption capacity of coconut shell activated carbon for both CO2 and CH4 increased with the decrease of temperature.Under the pressure of 0.45 MPa,0.85 MPa and 1.85 MPa for the dynamic tests,it was found that the separation factor will continue to increase with the decreases of temperature or pressure for binary mixed CO2/CH4 gas;besides,it was found the effect of temperature is greater than the impact of pressure;furthermore,the dynamic adsorption capacity of CH4 increases at first and then decreases within the range of experiment temperature.The research shows that coconut shell activated carbon for natural gas decarburization has broad application prospects.

    Electrochemical Reduction of Benzaldehyde to Phenylmethanol in Ionic Liquid BMIMBF4
    FENG Qiuju,LI Feng,XIAO Yonglai,LIU Renbo,CAO Ming,TIAN Jun
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  47-50. 
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    A new electrochemical procedure for the electrocatalytic reduction of benzaldehyde in ionic liquid,1-butyl-3-methyllimidazoliumtetrafluoborate (BMIMBF4),to phenylmethanol was investigated for the first time.The experiment was carried out in undivided cell under mild conditions,and the use of volatile and toxic solvents and catalysts,as well as any other additional supporting electrolytes,was avoided.The electrochemical reduction behavior of benzaldehyde in BMIMBF4 had been studied by cyclic voltammetry with a reduction peak at -1.8 V (vs.Ag).Phenylmethanol was obtained with 70% yield and 100% selectivity,by typical electrolyse procedure.

    Leaching Kinetics of Bornite in Acid Solution
    XU Jiajian,LIU Zhixiong,DAI Dongyang,TANG Liandong,XIANG Yanhong,ZOU Xiaoyong
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  51-55. 
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    The leaching of bornite was investigated in the sulfuric acid solution.The effects of different factors including leaching time,reaction temperature,particle size,the liquid-solid ratio,sulfuric acid and sodium sulfate concentration were investigated in details on the copper leaching rate of bornite.The leaching behaviors show that the copper leaching process is controlled by the mixed kinetic shrinking core model affected by both the interface transfer and diffusion through the solid layer.The reaction apparent activation energy was determined to be 33.97 kJ/mol,and the equation of kinetics can be written as:(ln(1-x))/3-1+(1-x)-1/3=kmt.

    Characteristic column.Study on Wuling Mountain Area
    Establishing Key Cities in Wulingshan Mountainous Area:A Case Study of Jishou City
    YANG Huaying,YAO Maohua
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  56-59. 
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    Wulingshan Regional Development & Poverty Alleviation Project (2011—2020) proposes the leading role of key cities,and the establishment of  “Six Key Cities”.Among the “Six Key Cities”,Jishou City has raised high expectations and thus its planning targets come first.This paper analyzes the advantages of establishing Jishou City as a key city in Wulingshan Region and presents countermeasures and suggestions in terms of infrastructure,specialty industry,environment,and city brand.

    Approaches for Mechanical Discipline to Serve Regional Development
    ZHANG Zheng,YE Fuqiu,BI Rengui
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  60-63. 
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    Mechanical discipline is one of the main cornerstones supporting the whole industrial development.Wulingshan Region remains underdeveloped;and hence it is worthwhile to investigate how to strive better service for the local social and economic development through mechanical discipline.According to the local situations and taking the mechanical discipline of Jishou University as an example,this study reveals the relevance between the mechanical discipline and the regional development in terms of subjects,teacher,undergraduates and postgraduates.Then some service approaches and suggestions suitable for Wulingshan Region are given.

    Evaluation and Countermeasures of Sustainable Development of Mineral Resources in Xiushan County
    TANG Yexi,ZHOU Qi,TUO Qing,ZHU Shenhai,LI Yuefeng,ZHAO Qingqing,DING Yulan
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  64-69. 
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    In consideration of abundant mineral resources in Xiushan County,this paper,based on a full analysis of exploitation and utilization status of mineral resources,applies Analytic Hierarchy Process (AHP) to layer indexes and determines the weight of each index.Then,with the application of an averaging comparison method to quantitatively correct the indexes of sustainable mineral resource development in Xiushan County and a comprehensive weighted sum method as well,the sustainable development value of Xiushan County is shown to be 0.66,which suggests that Xiushan county is in the medium ability of sustainable development stage.Finally,according to the evaluation result,the suggestions and countermeasures of sustainable mineral resource development of Xiushan County have been put forward.

    Medical Science
    Analysis of Antibiotics Misuse in Trauma Inpatients
    HAO Yiwei
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  70-72. 
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    This article investigates and analyzes antibiotics misuse in trauma inpatients.The results showed that among the 560 inpatients,β lactam antibiotics were the most frequently applied in all departments,accounting for 30.4% of the antibiotics misuses in general surgical department,38.1% in hand surgical department,37.9% in orthopedic surgical department,35.6% in neurosurgical department and 33.3% in urological department.There was no significant differences between the departments.The most common problems includes the improper course of treatment,especially the too long course of treatment,and the improper dosage,especially the insufficiency of dosage.By comparison,the incorrect combined medication and the medication without indication were rare relatively.Therefore,the professional competence of medical staff must be improved,and the more powerful measures should be strictly carried out to reduce antibiotics misuse.

    Effect of Baduanjin on Physiological Function of the Middle Aged and Elderly People:A Meta-Analysis
    WANG Jianyue,DING Yong,LI Yunqing
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  73-77. 
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    To objectively evaluate the effectiveness of Baduanjin,the health qigong,on the physiological functions of and blood lipid in the middle aged and elderly people,databases such as PubMed,Web of Science,EMbase,CBM,CNKI were electronically searched to collect the randomized controlled trials (RCT) published from January 2000 to December 2013.Meta-analyses were performed by using RevMan 5.2 soft ware.The results showed that the Baduanjin group was superior to the control group in decreases of systolic pressure (MD=-6.87,95%CI(-9.15,-4.60),P<0.000 01) and diastolic pressure (MD=-4.07,95%CI(-5.94,-2.19),P<0.000 1),increase of vital capacity (MD=393.15,95%CI(102.62,683.68),P=0.008),decrease of serum TC (MD=-0.60,95%CI(-1.07,-0.12),P=0.01),serum TG (MD=-0.23,95%CI(-0.32,-0.14),P<0.000 01) and serum LDL-C (MD=-0.31,95%CI(-0.57,-0.05),P=0.02),and increase of serum HDL-C (MD=0.19,95%CI(0.06,0.32),P=0.003);and there were statistical differences.It can be concluded that the effects of Baduanjin can improve the physiological functions of the middle aged and elderly people and control their blood lipid level;and thus it can be used as the means for prevention and treatment of hypertension,hyperlipidemia and other age-related diseases.

    Education and teaching
    Comprehensive Reform of Instructional Programs by Universities in the West Minority Areas:A Case Study of Jishou University
    LI Jianfeng,LI Qisheng,LENG Zhiming
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  78-82. 
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    The Comprehensive Reform of Instructional Programs enforced by the Ministry of Education is one of the most important projects of undergraduate education and it is a precious opportunity for the universities in west minority areas.In the course of the Comprehensive Reform of Instructional Programs,it is essential to find the similarities and differences in the aspect of discipline construction between universities in west minority areas and other areas.To formulate projects appropriate to the development of universities in the west areas under the guidance of the principles of the Comprehensive Reform of Instructional Programs,the specific economic conditions of the minority areas should be considered,the characteristics of schooling and talent cultivation should be prioritized;furthermore,the demands of the society and the all-round development of students should be emphasized.

    Practice on Improving the Teaching Skills of Normal College Students in Mathematics
    FANG Donghui,LI Aihua
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  83-86. 
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    By conducting a questionnaire survey,we analyse the problems in teaching skills during the teaching practice in mathematics for high-school students,and give some suggestions for improving the teaching skills of normal college students in mathematics based on the teaching practices of Jishou University.

    Cultivation of Students’ Innovative Practical Ability Based on Team Learning
    DUAN Mingxiu,HE Yingsheng,WANG Congyin,JIANG Xiaohui,LU Rongbo
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  87-90. 
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    Aiming at the problems of the traditional teaching mode of computer specialty in colleges and universities,the mode of team learning is put forward to develop the students innovation ability.The research and practice of “team learning” can better improve students’ ability of analyzing and solving problems,their innovative spirit and ability,and their awareness of teamwork.

    Management
    Current Status of and Strategies for College Dormitory Culture Construction in Minority Area:Dormitory Cultural Development in Jishou University
    ZHOU Qiuju
    Journal of Jishou University(Natural Sciences Edition), 2016, 37(2):  91-96. 
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    Dormitory is the most important place for the college students to study and live.The cultural construction of dormitory has a special influence on college students' ideological,political,psychological and moral construction.College students in minority areas come from various regions of the country,especially minority areas.The proportion of non-Han students in colleges of minority areas is relatively higher than that in non-minority areas.A number of factors including different ethnic and cultural backgrounds,beliefs and customs decide the characteristics of the cultural construction of dormitory in these colleges.With the cultural construction of dormitory in Jishou University as an example,questionnaire,case interview and SPSS software analysis were used to analyze the current situation in four cultural dimensions including the material,spirit,behavior and system.Accordingly,the strategies for cultural construction of dormitory in colleges of minority areas are proposed.

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