Table of Content

    25 September 2009, Volume 30 Issue 5
    Mathematics
    Finite Subgroups in GL(2,Q)
    YOU Xing-Zhong, PENG Da-Qian, WANG Xiang-Fen
    journal6, 2009, 30(5):  1-3. 
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    All non-conjugate finite subgroups in the general linear group GL(2,Q) are determined in this paper.
    Solvability of Discontinuous Beam Equations Simply Supported at Both Ends
    YAO Qing-Liu
    journal6, 2009, 30(5):  4-12. 
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    The existence of solution for a fourth-order two-point boundary value problem is studied,where the nonlinear term is a Carathéodory function and contains all lower order derivatives of the unknown function.In mechanics,the problem describes the deflection of an elastic beam simply supported at both ends.
    Convergence  of Formal Series Solution to  a Class of Non-Homogeneous String Vibration Equation
    XING Jia-Sheng, ZHU Jian-She
    journal6, 2009, 30(5):  13-17. 
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    The convergence of the formal series solution to the initial boundary value problem for the non-homogeneous wave equation is considered.By proving the uniform convergence of the series formal series and the uniform convergence of the formal series after the partial derivative,the authors prove the existence and uniqueness of classical solution and the existence;and at the same time the authors prove the existence of the generalized solution to the initial boundary value problem for the non-homogeneous wave equation.
    Hankel Matrix Solutions of Linear Matrix Equations
    CHENG Xue-Han, YIN Feng-Zhi
    journal6, 2009, 30(5):  18-20. 
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    This paper,on the basis of the vector function and kronecker product theorems,definites parts of the matrix vector functions.After using and analysing the nature of the Kronecker product and Moore-Penrose generalized inverse,this paper also presents the structure and algorithm and examples of the Hankel Matrix solution of linear nature matric equation.
    Projective Operators of Inner  Product   H-Z-Spaces and  Its  Nature
    QIN Xuan-Hua, YANG Wan-Bi
    journal6, 2009, 30(5):  21-25. 
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    Introducing the concept of projective operators and self-adjont operators of inner  product H-Z-spaces,this paper dicusses the nature of projective operators on inner product  H-Z-spaces,and analyzes the nature of projective operators on Hilbert spaces being established in inner  product  H-Z-spaces.
    Neumann Problems of Singular Elliptic Equations Envolving Critical Sobolev-Harty Exponents
    GONG Yan
    journal6, 2009, 30(5):  26-29. 
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    The existence of positive solution  for singular elliptic equations is studied,including Hardy-Sobolev critical exponent in the condition of 0∈Ω.It is different from 0∈Ω.The variational function is proved corresponding to the equationsatisfy local (PS) condition,and  a general exitence theorem is obtained.
    Some Properties of Locally Subparacompact Space
    BIAN Xiao-Xia, JI Hong-Lei, LIU Gui-Lan, ZHANG Xue-Mei
    journal6, 2009, 30(5):  30-31. 
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    Three kinds of locally subparacompact spaces are defined.Their  properties are discussed respectively.Some good properties in sub paracompact spaces are   extended to locally subparacompact spaces.So some known results of subparacompactness    are generalized.
    Linear Programming Problem Sensitivity Analysis and Applications
    YANG Yu-Ying
    journal6, 2009, 30(5):  32-35. 
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    The paper discusses the influence on optimal solution of LP problem when varying value vector and coefficient matrix by using lumped matrix.Accordingly the common handling method is given.And based on the theory,the author gives some concrete examples.
    Quasi-Maximum-Likelihood Estimation for a Nonlinear Autoregressive Model
    PAN Bao-Guo
    journal6, 2009, 30(5):  36-40. 
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    Quasi-maximum likelihood estimation in nonlinear autoregressive models with GARCH errors is considered.Strong consistency of quasi-maximum likelihood estimates are proved under some conditions.The result is more general.Finally the result is applied to linear autoregressive models with GARCH errors.
    Scheduling with a Maintenance Activity and Common Due Date Assignment on Single Machine
    YOU Jin-Ting, TANG Heng-Yong
    journal6, 2009, 30(5):  41-44. 
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    This paper studies single-machine scheduling with a maintenance activity and common due date assignment problem in which the processing time of a job depends on its position in a sequence.The objective functions include the cost of the due date,the total earliness of the scheduled jobs and the total cost of discarded jobs that cannot be completed by their due dates.Polynomial-time dynamic programming algorithm is thus presented.
    Computer
    An Improved Image Retrieval Algorithm Based on Color Histogram
    YE Zhi-Wei, XIA Bin, ZHOU Xin, ZHANG Yan-Chao
    journal6, 2009, 30(5):  45-48. 
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    The use of color histogram is a common method for image retrieval,since conventional color histogram retrieval method is prone to lose the spatial information of colors,thus affecting both the recall and the precision.A new image retrieval algorithm is proposed in this paper.According to the method,an image is cut into sub-blacks first;then the retrieval is performed by the weighted method of sub-block’s color histogram.Experimental results show that both the recall and the precision are improved effectively.
    Mathematics
    Design of Campus Network Work Model Based on PKI
    ZHANG Xiao-Dan, LI Hai
    journal6, 2009, 30(5):  49-52. 
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    Safety is very important for construction of the campus network work.PKI technology,as one kind of public key infrastructure,has provided a frame,under which the encrypted campus network work safety service can be implemented.In this paper,the security problems and requirements of the Jishou university network work system are  firstly analysed;and then a kind network work model  of Jishou university based on the mixed trust model and PKI is designed.
    Computer
    Ad hoc Network Routing Protocol Based on On-Demand Distance Vector and the Best Link-State
    TANG Xi-Lun
    journal6, 2009, 30(5):  53-55. 
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    Ad hoc network is a new type of wireless network without router.The ever-increasing concerns on Ad hoc networks promots the research of the relevant technology,and promots its gradual move towards practical application.The author discusses the present situation of the research on Ad hoc network routing,the requirements and applications of routing protocol;and at the same time it focuses on key technologies,features and applications of Ad hoc network routing protocol based on on-demand distance vector and the best link-state which has been passed by IESG and become RFC standard.
    Physics and electronics
    Soliton Solutions to (2+1)-Dimensional  Nonlinear Schrdinger Equation with Distributed Coefficients
    XU Si-Liu, CHEN Shun-Fang
    journal6, 2009, 30(5):  56-59. 
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    F-expansion techniquel is used to construct solutions to (2+1)-dimensional Schrdinger equation with distributed coefficients,and thus exact solutions to bright and dark solitons are gotten.Those solitons constitute a class of soliton cluster.
    Optimized Solution of  P-Hub Median Problem Based on SOFM
    ZHUO Yue-Ming, FAN Xiao-Bing
    journal6, 2009, 30(5):  60-63. 
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    Location-allocation is a important research area in transportation problem,and P-Hub median is widely used in aviation,communication,post system and so on.Many heuristic methods are applied to find optimal solution in P-Hub median problem,such as GA,SA,Hopfield Network etc.With the number of customers and service centers known,this article presents the solution method based on artificial neural network SOFM,which uses self-learning of neurons to get optimal location and cluster.
    Design and Simulation of Digital PID Controller Based on Quartus II
    SU Shan, YANG Yan-Ling
    journal6, 2009, 30(5):  64-66. 
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    Aiming at the shortcoming of the digital PID controller based on microprocessor,a design of PID controller based on Quartus II is put forward.In this design,the PID controller is achieved by using software platform Quartus II and DSP Buider.The simulation results prove the algorithm of the PID controller.
    Three Dimensional Modeling and Movement Simulation of the Machine Vice Based on Solidworks
    TANG Xian-Yun
    journal6, 2009, 30(5):  67-69. 
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    Making assembly drawing according to two-dimensional part drawing is an important practice link for mechanical engineering students.Aiming at the problems in traditional teaching,this paper introduces a method to use Solidworks to do three dimensional modeling,virtual equipping,exploded-views’ making and simulation moving with drawing a machine vice as an example.At the same time,the paper also suggests a new pattern which applies 3D modeling teaching in the machine drawing’s pattern“part drawing-object-assembly drawing”,so that the teaching effect can be improved.
    Information and Engineering
    Monitoring Measurement and Analysis of Subway Tunnel Construction
    TANG Yong, ZHANG Tao
    journal6, 2009, 30(5):  70-73. 
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    With the rapid development of urban transportation construction,there is an increase in the number of subway tunnel;meanwhile,more and more unfavorable engineering geological problems appear during  tunnel construction.Monitoring measurement,as one significant means to ensure security,optimize design,guide construction,its technological progress exerts a vital influence on unfavorable geology’s tunnel construction.Considering the practice of tunnel monitoring in Henggang depot of No.3 subway Shenzhen,this article analyzes construction monitoring data which will be fed back to construction,and summarizes the precautions that need to be paid attention in the monitoring of subway tunnel,all of which plays a reference effect in other similar projects.
    Optimization Design of Oscillatory Roller Transmission Based on Global Optimization
    JIN Deng-Quan
    journal6, 2009, 30(5):  74-76. 
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    Oscillatory roller transmission is a new kind of transmission.The basic parameters of oscillatory roller transmission play an important effect on transmission technology and economy.In this paper,the optimum model is established and the global optimum solution is obtained by LINGO10.0 software.The result shows the model is practical and effective and its solution is global solution,better than the result with general optimum method.As the method is simple,it is worthy to spread in optimum design.
    Biological resources
    Cloning and Correlation Analysis of Cold Adaptation of NADH-Quinone Oxidoreductase 3 Subunit Gene from Common Carp(Cyprinus Carpio)
    LIANG Li-Qun, CHANG Yu-Mei, ZOU Qing-Wei, LEI Qing-Quan
    journal6, 2009, 30(5):  77-81. 
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    Genes expressed specifically at low temperature were used to design primers and to screen brain full-length cDNA library of common carp (Cyprinus carpio) through two rounds of clonal PCR method.After that,gene 152 was discovered and sequenced,and determined finally as NADH-quinone oxidoreductase 3 subunit gene using homologous searches.This gene was confirmed to play an important role as the force generators for fish in a low water environment.In addition,NADH-quinone oxidoreductase 3 subunit gene was associated with cold adaptation of common carp to some extent in oxidation of respiratory chain electron transport system.
    Primary Nutrient Salt Sources of Self-Pollution of Net Cage Culture in Shallow Sea
    GE Chang-Zi
    journal6, 2009, 30(5):  82-86. 
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    It is self-pollution of net cage culture stamped by eutrophication and bio-sediment to limits the healthy development of this industry.The eutrophication is mainly represented by overage accumulation of nutrient salt.In shallow sea,the excretions of cultivated organisms,fouling organisms and wild fish,exchanges of nutrient at the interface between water and sediment or particulate matters are the major nutrient salt sources of self-pollution in culture system.Thus,in the research on nutrient salt sources of net cage culture self-pollution in shallow sea,it is important to study the environmental dynamic loadings of cultivated fish,the resources and ecological effects of fouling organisms and other kinds of organisms,and nutrient salt regeneration in particulate matters or sediment.
    Metabolic Dynamic of Camptothecin and 10-Hydroxycamptothecin in  Camptotheca acuminata Decne Leaves During the Process of Growth
    LI Xiang-Li, XIAO Kai-Jun, HU Xian-Yun, LUO Xin-Yi, GUO Si-Yuan
    journal6, 2009, 30(5):  87-92. 
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    An HPLC method for the simultaneous determination of CPT and HCPT in Camptotheca acuminata Decne.leaves was established.Using this assay,CPT and HCPT in leaves of Camptotheca acuminata Decne. in different seasons were determined.The results showed that,in a year,the content of CPT presented two peaks curve in tender leaves of C. acuminata,which appeared in July and September respectively and reached the highest point in July,while it declined persistently in older leaves;The accumulation of CPT and HCPT presented evident relativity in the different growth stages.
    Supercritical CO2 Fluid Extraction of Taxol from Needles of Taxus Chinensis var. Mairei
    PENG Qing-Zhong, SHI Jin-Xiao, YI Lang-Bo, PENG Qing-Jing
    journal6, 2009, 30(5):  93-95. 
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    Supercritical CO2 fluid extraction technology was used to extract taxol from the needles of Taxus chinensis var. Mairei.The result shows that the best cosolvent is ethanol with 10%~15% water content and the best volumetric ratio of cosolvent to supercritical fluid is 0.12,and the best process conditions are extraction pressure 30 MPa,temperature 50 ℃,and time 2 h.Under the optimal conditions.the extraction rate of taxol surpassed 93%.
    Chemistry and chemical engineering
    Synthesis of Antimicrobial Pazufloxacin Mesilate
    SHEN Xu-Xiang, PENG Xiao-Chun, GONG Xing-Lang, XIAO Zhu-Ping, WANG Ying-Chun, LI Zhi-Ping
    journal6, 2009, 30(5):  96-100. 
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    〗Pazufloxacin mesilate was synthesized from (S)-9,10-difluoro-3-methly-7-oxo-2,3-dihydro-7-H-pyrido[1,2,3-de][1,4] benzoxazine-6-carboxylate with nuclephilic substitution,selective decarboxylation,cyclic addition,hydrolysis,Hofmann recomposition and salt formation.The product was tested by HPLC and the results showed content of 91.352 g/L.The optimized process is suitable for industrial mass production.
    Factor Analysis and Cluster Analysis on Blending and Threshing Techniques for Tobacco
    FU Zai-De, ZHANG Qi-Long, LI Hui, SHI Hui, TANG Zong-Bao, ZHANG Zi-Jie, WAN Zu-Gang, LIU Ji-Yan, ZHANG Yu-Ying
    journal6, 2009, 30(5):  101-105. 
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    Application of factor analysis and cluster analysis on blending and threshing techniques for tobacco was performed by using conventional chemical composition  as indicator.Factor analysis showed that three factors affecting the tobacco quality signifcantly were nitrogen,nicotine and total sugar/nicotine ratio.It can be concluded by cluster analysis that there are mainly five different types of tobacco,i.e. Xiangxi Longshan C3F,C2F,B1F,C1F tobacco and Sichuan Pangzhihua B3F tobacco;Xiangxi Longshan CX2K,X34 and X3F toabcco;Xiangxi Longshan B4F,C4,X4F toabcco and Sichuan Pangzhihua B2F,C3F and B2L tobacco;Xiangxi Longshan CX1K,B1K,C1L tobacco;Xiangxi Longshan B2K,X2F,B23 and B2L tobacco.Similar quality for each type of tobacco indicated that these tobaccos can be blended for the following threshing procedure.
    Sports
    Status Quo and Influencing Factors of After-School Physical Exercises of Undergraduates in  Changsha-Zhuzhou-Xiangtan Urban Agglomeration
    OuYang-Xiu-Xiong
    journal6, 2009, 30(5):  106-108. 
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    Through interview,questionnaire and statistics,this article analyzes the status quo and influencing factors of after-school physical exercises of undergraduates in Changsha-Zhouzhou-Xiangtan urban agglomeration.The results show that undergraduates have positive attitude towards physical exercises.According to the existing problems,the article brings out some reasonable suggestions.
    Joint Development of  Ethnic Traditional Sports in Xiangxi and School Sports
    HUANG Wen-Hui
    journal6, 2009, 30(5):  109-112. 
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    Through literature and field survey,the author studies the feasibility and methods to jointly develop ethnic traditional sports in Xiangxi and school sports.Some measures are put forward to promote the reform of school sports and the preservation of ethnic traditional sports.
    Medical Science
    Pathophysiologic Mechanism of Second Brain Injury and Prospect of Its Forensic Significance
    CHEN Ren-Hui, ZHENG Jun-Xiong, QIU Xiao-Qian, TANG Guo-Sheng, QIU Li-Ming, YE Qian-Ling
    journal6, 2009, 30(5):  113-115. 
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    The study of second brain injury (SBI) is focused on clinic field,but there is little research in forensic medicine field.The article outlines animal model making of SBI and pathophysiologic mechanism of the occurring of SBI,and  analyzes the prospect of SBI study from the view of forensic medicine.
    Tourism
    Risk Prevention and Resolution Measures  in Tourism Industry
    WANG Zhao-Feng, ZHU Yan-Feng
    journal6, 2009, 30(5):  116-120. 
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    Tourism is a cross-industry which is highly sensitive to risk.Research of risk prevention and resolution measures in tourism industry can bring down the risk and promote the harmonious development of tourism industry.This paper,firstly,reviews the research of  related literatures in tourism industry risk;secondly,analyzes causes for tourism industry risk from the production structure,market structure of tourist source,economic fluctuations,unexpected incidents,and influence from natural disasters.Lastly,this paper provides some counter measures:to optimize the product structure,promote innovation and upgrad  industrial structure;to strengthen marketing,broaden tourist source market and optimize the market structure;to promote cooperation among government,tourism association,enterprises and etc;to do much in disaster prevention,reduction and early-risk warning in tourism industry.
    Management
    Empirical Study on Fictitious Trade Area  Based on Huff Model
    TANG Hong-Tao
    journal6, 2009, 30(5):  121-125. 
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    Electronic Commerce gradually becomes the driving force of economic and social development.Internet environment greatly changes the  traditional Huff mode.The paper puts forward fictitious trade area model based on the revised  traditional Huff model and checks  it up by six online stores of Taobao and Paipai.The result is satisfactory.
    PR Crisis in WEB2.0 Era
    LIU Xuan
    journal6, 2009, 30(5):  126-128. 
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    WEB2.0 is an upgrading in both the technotology and ideology of Internet.Featured as individualistic and decentralized the concept focues on broad participation of users and universal communication.In WEB2.0 age brand crisis gets more uncontrollable and spreads in a “virus” way,which becomes a normal state to brands on the market.The key to better use of communication media in the WEB 2.0 age to construct a stable mechanism for crisis prevention is speed in choosing new media.The feeling of audience should als be primarily considered before a theme can be decided.
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