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    Journal of Jishou University(Natural Sciences Edition) 2012 Vol.33
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    Prime Factor Function Distribution Properties of Mean
    GAO Li, XIE Rui, ZHAO Qin
    journal6    2012, 33 (1): 1-2.   DOI: 10.3969/j.issn.1007-2985.2012.01.001
    Abstract2917)      PDF(pc) (209KB)(1899)       Save
    Elementary method and analytic method are used to study the mean value properties of all prime factor function Ω(n)  and k-th complement function fk(n),and thus an interesting asymptotic formula is given,which perfects  the research and application of prime factor function and complement function in number theory.
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    Sturm Comparison Theorem of  Three Order Nonlinear Differential Equations
    QIN Hong-Li, LI Fei-Fei
    journal6    2012, 33 (1): 3-6.   DOI: 10.3969/j.issn.1007-2985.2012.01.002
    Abstract3652)      PDF(pc) (248KB)(2269)       Save
    Using differential inequality,the Sturm comparison theorem of  a class of third order nonlinear differential equations is discussed,and the zero point existence of the equations is obtained.
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    A Class of Nonlinear Bamboo Grove Dynamics System Considering Interior Dissipation
    XU Long-Feng, GE Xiao-Li
    journal6    2012, 33 (1): 7-11.   DOI: 10.3969/j.issn.1007-2985.2012.01.003
    Abstract2956)      PDF(pc) (305KB)(1768)       Save
    A class of nonlinear bamboo grove dynamics system considering the effect of  bamboo shoot on the bamboo growth is studied.characteristic method and integral equation theory are used to prove the unique existence of the classical solution to the initial boundary value problem of that system.
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    Existence Theorems of Solutions for the System of Generalized Vector Cone-Properly Quasi-Convex Quasi-Equilibrium Problems
    CHEN Jian-Chen, WANG Jin-Duo
    journal6    2012, 33 (1): 12-17.   DOI: 10.3969/j.issn.1007-2985.2012.01.004
    Abstract2320)      PDF(pc) (280KB)(1863)       Save
    The system of generalized vector cone-properly quasi-convex quasi-equilibrium problems is considered.As its applications.The existence results are derived for weakly Pareto-Nash equilibrium points for multiobjective generalized game problems and multiobjective game problems in real locally convex Hausdorff topological spaces.
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    Integratal Method Factor for Solving First Order Linear Non-Homogeneous Ordinary Differential Equations and Its Application
    FENG Da-Yu
    journal6    2012, 33 (1): 18-20.   DOI: 10.3969/j.issn.1007-2985.2012.01.005
    Abstract3043)      PDF(pc) (207KB)(1499)       Save
    In order to solve the first order linear non-homogeneous ordinary differential equations easily,the  integratal factor method  is investigated.The concrete procedures of some practical examples using the  integratal method factor are given,which are simpler than that of  constants variation  and can be widely used.
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    Topological Ergodicity of Almost Periodic Points Dense
    LI Nan, DONG Ming-Hui, WANG Xin-Miao
    journal6    2012, 33 (1): 21-22.   DOI: 10.3969/j.issn.1007-2985.2012.01.006
    Abstract2643)      PDF(pc) (238KB)(1970)       Save
    The authors constructed the almost periodic point dense system based on minimal mapping,studied  the relation between the almost periodic point dense system and Li-Yorke chaos by using topological transitivity and density,and  proved the topological ergodicity of the almost periodic points dense system under certain conditions.The study established the relation between the almost periodic point dense system and topological ergodicity,and had some enlightenments on the further studying of the characteristics of the measure centre of the almost periodic points dense system.
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    Matrix’s Triangular Factorization and Its Application
    GU Jiang-Yong
    journal6    2012, 33 (1): 23-25.   DOI: 10.3969/j.issn.1007-2985.2012.01.007
    Abstract2913)      PDF(pc) (236KB)(2718)       Save
    The triangular factorization of matrix theory is comprehensively discussed,with the identification and promotion of matrix triangular factorization being mainly explained,as well as its application in  solving linear equations  and group theory.
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    Valuation of Credit Default Swaps in Jump Diffusion Market
    PANG Mao-Xiu, YANG Rui-Cheng, LV Qiang , XIA Bing
    journal6    2012, 33 (1): 26-31.   DOI: 10.3969/j.issn.1007-2985.2012.01.008
    Abstract3141)      PDF(pc) (326KB)(2389)       Save
    Given the correlation between the firm value and the debt,the paper assumes that the firm value is driven by the double exponential jump diffusion process and the debt is a continuous stochastic process.By the method of the Gaver-Stehfest algorithm and the arbitrage asset pricing theory,the default probability and the price expression of credit default swaps are obtained.
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    Networks with High Clustering Coefficients Based on BA Model
    WANG Xiao-Yun, DENG Ke
    journal6    2012, 33 (1): 32-35.   DOI: 10.3969/j.issn.1007-2985.2012.01.009
    Abstract2734)      PDF(pc) (302KB)(1978)       Save
    The authors discuss briefly some properties of the BA model and point out that such model is insufficient to describe real networks for its relatively small clustering coefficient.Based on the BA model,and introducing  edge addition into network evolution,the authors propose a modified network model.Numerical simulation results indicate that in the modified model,the networks are scale-free,just as the networks in the BA model.In addition,the networks in such model are highly clustered.It is shown that the clustering coefficient C of network increases with the increase of edge-addition probability p in the modified model.In particular,when p=1,C is found to be 100 times higher in the modified model than that in the BA model with the same network-size.
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    One-Dimensional  Function  Photonic  Crystals
    WANG Qing-Cai, WANG Yan, WANG Guang-Huai
    journal6    2012, 33 (1): 36-40.   DOI: 10.3969/j.issn.1007-2985.2012.01.010
    Abstract2972)      PDF(pc) (506KB)(2117)       Save
    A new kind of function photonic crystals is presented,whose refractive index is a function of space position.Based on Fermat principle and by  using the transfer matrix theory,the influences of the refractive index of photonic crystal dielectric layer,number of cycles,and angle of incidence on the band structure of photonic crystals are studied.This study provides a theoretical basis of the preparation of photonic crystals with specific band gap.
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    The Modified of the X-Ray Diffraction Intensity Formula
    BA Nuo, GAO Hai-Xin, LIU Xiao-Jing, WU Xiang-Yao, ZHANG Yu-Mei, ZHANG Si-Qi, WANG Jing, GUO Yi-Qing
    journal6    2012, 33 (1): 41-45.   DOI: 10.3969/j.issn.1007-2985.2012.01.011
    Abstract4632)      PDF(pc) (345KB)(3484)       Save
    The X-ray diffraction technology has been widely applied in phase identification,the determination of lattice parameters and the testing of the microstress.In order to precisely determine the physical parameters,the calculation of the X-ray diffraction intensity is very important.At present,comparedg with the experimental data,the theoretical results of the X-ray diffraction intensity formula have a large deviation.In this paper,the X-ray diffraction intensity formula has been modified reasonably and the improved results of the theoretical are in good accordance with the experimental data.
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    Design of  Down Conversion Mixer with Low Voltage and High Linearity
    ZHANG Yin-Xing, YANG Hui-Yuan, SONG Zhi-Guo
    journal6    2012, 33 (1): 46-48.   DOI: 10.3969/j.issn.1007-2985.2012.01.012
    Abstract2326)      PDF(pc) (310KB)(2181)       Save
    Based on LC-tank folded structure,a mixer with low voltage and high linearity is designed.The mixer with LC-tank folded structure is low voltage structure mixer,Compared with Gilbert mixer,it solve the high voltage and high power loss problem  brought by the stacking of  transconductance level and  switch level,as well as the compromise problem casued by  high transconductance,high linearity and low noise.Using Agilent Corporation’s ADS software,simulation is carried out based on TSMC 0.25 μm,the results show that the working voltage is 1.0 V,RF frequencty is 2.5 GHz,local oscillation frequcncy is 2.25 GHz,intermediate frequency frequency is 250 MHz,conversion gain is 1.080 dB,IIP3point is at 25.441 dBm,signal side-band noise index is 4.683 dB,double side-band noise index is 8.387 dB,the power dissipation is 7.088 mW.
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    Design of FIR Digital Filter Based on Window Function
    WANG Jian-Xing, YAO Qi-Guo, LIU Yu-Liang, LI Lin
    journal6    2012, 33 (1): 49-52.   DOI: 10.3969/j.issn.1007-2985.2012.01.013
    Abstract3124)      PDF(pc) (333KB)(3889)       Save
    The FIR digital filter is widely used in many fields which require the signal path with linear phase,such as image procession,data transmission,and so on.The filter performance can be easily changed with the varying filter parameters.This article elaborates the designing thought of digital filter,and discusses the linear phase condition and margin characteristic of FIR.And then,it sets the rectangle window and Blackman window as examples,realizes the filter’s simulation design by means of MATLAB.The simulation result showed that the procedure was simple and easy to be achieved when designing digital filter with the help of computer software,and all the filtering norms could reach the assigned claim.It may promote the digital filter’s application.
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    A Novel Triangle Open Loop Filter Using Loaded Structures
    TAN Ming-Tao, SONG Zhi-Guo
    journal6    2012, 33 (1): 53-55.   DOI: 10.3969/j.issn.1007-2985.2012.01.014
    Abstract2738)      PDF(pc) (413KB)(1970)       Save
    A novel triangle open loop resonator using loaded structures is introduced.The loaded structures can improve the electromagnetic coupling between the resonators.Then a filter using those resonators is designed.Compared with traditional triangle open loop resonator filter without loaded structures,the filter with loaded structures has better transmission capability in the passband.
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    Finite Element Analysis of Measuring Residual Stress by Drilling Hole Method
    CHEN Cong
    journal6    2012, 33 (1): 56-60.   DOI: 10.3969/j.issn.1007-2985.2012.01.015
    Abstract2534)      PDF(pc) (1775KB)(3430)       Save
    Releasing coefficient is one of the most important index when applying hole-drilling method to measure residual stress.In this paper,the effect of the position of strain gages and the depth of drilled hole on the releasing coefficient are studied by using the finite element method (FEM),and the corresponding fitted curves are acquired.Compared with the previous research results,the method and results discussed in this paper is valid.
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    Relationship Between the Drying Net Tension and the Position of Adjusting Roller
    DING Qi-Min
    journal6    2012, 33 (1): 61-64.   DOI: 10.3969/j.issn.1007-2985.2012.01.016
    Abstract3078)            Save
    The drying net tension of paper machine varies with the cylinder pressure and the position of adjusting roller.To guide production,the variation rules of 3 variables are found out by founding mathematic model,which resolve the judgment in production only based on experience and improve work efficiency.
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    Software Design  Improvements of Video Electronic Police Front-End System
    YI Lian-Jie, HU Shuang-Yan
    journal6    2012, 33 (1): 65-68.   DOI: 10.3969/j.issn.1007-2985.2012.01.017
    Abstract2588)      PDF(pc) (379KB)(2148)       Save
    Based on analysis of the advantages and the disadvantages of the  previous electronic police system,an improved front-end system scheme is proposed.This scheme uses 2 to 4 virtual coils to detect the vehicle  running the red light.In order to improve the detection rate,a portion sample pixels’ changing of each coil  is used as the basis to detect the vehicles which fail to stop at the red light,and this approach is practical.In actual use,the numbers and detecting areas of the virtual coils can be adjusted according to the scene,which can achieve better results.
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    Design and Implement of Open CNC FDM Control System
    HE Xin-Ying, PAN Xi-Qi
    journal6    2012, 33 (1): 69-71.   DOI: 10.3969/j.issn.1007-2985.2012.01.018
    Abstract3781)      PDF(pc) (318KB)(1982)       Save
    As one of the rapid prototyping technology,fused deposition modeling has developed rapidly.In order to meet the requirements of low cost,a kind of  single microcomputer control system based on the open bus structure has been designed,including the hardware system structure and software system structure,by using the modular design.The control system has very important practical value and theoretical significance to reduce volume and costs at the premise of maintaining  the stability and control precision.
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    Design and Implementation of Remote Direction and Supervision of Thesis Based on  B/S Model
    ZHU Chang-Cheng, JIANG Zhen-Ming, LIU Da-Wei
    journal6    2012, 33 (1): 72-75.   DOI: 10.3969/j.issn.1007-2985.2012.01.019
    Abstract2504)      PDF(pc) (330KB)(2197)       Save
    Traditional paper media management mode is not beneficial for teachers to direct and supervise students writing thesis,and it was  not beneficial for the administrative department to effectively supervise the whole progress either.Based on B/S structure and MVC mode,the system introduced in this paper uses electronic document as the media to realize the digital management of the thesis writing,and thus avoids the disadvantages of the traditional management mode.
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    Studies on Seven Behavioral Traits of Lateral Functional Dominance of the Miao Nationality in Fenghuang Hunan
    LIU Jian-Guo, LI Bei
    journal6    2012, 33 (1): 76-80.   DOI: 10.3969/j.issn.1007-2985.2012.01.020
    Abstract2448)      PDF(pc) (327KB)(1877)       Save
    Seven traits of lateral functional dominance including hand clasping, handedness,arm folding,leg folding,foot preference,stride type and eye preference of the Miao nationality in Fenghuang Hunan were analyzed and compared with the traits of other nationalities.The results showed that among the 7 traits,the frequencies of right type in 3 traits were over 50%,the frequency of the arm folding had sexual difference (P>0.05),and all the traits were highly correlated.
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    Anther in Vitro Culture of Capsicum Annuum and Its Chromosome Number Variation
    WU Guang-Hui, HUANG Li-Fang, JIANG Jian-Xiong
    journal6    2012, 33 (1): 81-84.   DOI: 10.3969/j.issn.1007-2985.2012.01.021
    Abstract3157)      PDF(pc) (4336KB)(2196)       Save
    The haploid induction from Capsicum annuum through anther culturing was studied.The results showed that both of the calli and embryos were induced on NTH as well as MS basal medium but the medium of NTH + 6-BA 0.2 mg/L + NAA 0.5 mg/L + KT 1.2mg/L + AgNO3 5.0 mg/L was the optimal medium for inducing calli and embryos.Several kinds of plants in different ploidy levels were obtained through anther culture,14% of which were the haploids,46% the diploids,4% the tetraploids,and 36% the mixoploids.
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    Preliminary Study on Introduction of  Smallanthus Sonchifolius into Jishou
    GU Zhong-Cun, WU Yu-Xian, TANG Xian-Jiang, WU Chao-Yun, LI Yan, SU Gui-Rong, LU Fei
    journal6    2012, 33 (1): 85-88.   DOI: 10.3969/j.issn.1007-2985.2012.01.022
    Abstract2688)      PDF(pc) (362KB)(1842)       Save
    Yacon ( smallanthus sonchifolius) is perenial herbage from of the composite family,which was originally cultivated in south america in the andean highlands with altitude of 880~3 500 m from ecuador to the northwest of argentina.In 2009,Smallanthus Sonchifolius was introduced from kunming,Yunnan into hilly regions in Jishou with altitude of about 300 m by our research group and succeeded,in 2010 and 2011,our research group expanded the scope and area of test for two consecutive years,and got good harvest.
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    Quality Analysis of the Mineral Water in Resource Xiangxi
    LONG Jing-Xue, ZHU Shi-Long, ZHANG Pao, JIANG Hong, DUAN You-Gou
    journal6    2012, 33 (1): 89-93.   DOI: 10.3969/j.issn.1007-2985.2012.01.023
    Abstract2857)      PDF(pc) (349KB)(1823)       Save
    After investigation of the mineral water resources,the water samples were selected from the representative springs,The trace elements were tested by ion chromatography method (IC),inductance coupling ion mass spectrometry(ICP-MS) and chemical titration.The quality of those water samples were thus analyzed and evaluated.The results show that the water resources in Xiang xi mineral were mainly fresh spring water with a variety of trace elements essential for human body but with low content of limitative elements.All the health indicators meet standards.
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    Leaching of Manganese from the Residue of Electrolytic Manganese
    FAN Dan, DENG Qian, XIONG Li-Zhi, HE Ze-Qiang
    journal6    2012, 33 (1): 94-97.   DOI: 10.3969/j.issn.1007-2985.2012.01.024
    Abstract3043)      PDF(pc) (340KB)(1896)       Save
    The effects of temperature,liquid/solid ratio,reaction time,acid/ore ratio,usage of addition agents on Mn2+ leaching rate were investigated by choosing five addition agents(noted as A,B,C,D and E) with different structure.Experimental results show E helps improve the Mn2+ leaching rate greatly.The optimal conditions were obtained as follows:liquid/solid ratio is 1:3,acid/ore ratio is 0.3:1,reaction temperature is 60℃,reaction time is 90min and the usage of E is 0.6%.Under these conditions,the Mn2+ leaching rate of 52.8% can be obtained.
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    Competitiveness Evaluation of Tourism Industry Cluster of the Hunan-Hubei-Chongqing-Guizhou Border Region
    WANG Zhao-Feng, YU Han, YANG Wei-Shu
    journal6    2012, 33 (1): 98-103.   DOI: 10.3969/j.issn.1007-2985.2012.01.025
    Abstract3199)      PDF(pc) (393KB)(1808)       Save
    The innovation of tourism industry cluster is the source of its competitive advantage.This paper analyzes the competitiveness factor of tourism industry cluster of the Hunan- Hubei- Chongqing- Guizhou border region,and constructs an evaluation index system.The fuzzy comprehensive evaluation method is used to evaluate the competitiveness of tourism industry cluster of Zhangjiajie City as an example and some strategies are proposed to enhance the competitiveness of tourism industry cluster.
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    Analysis of Influencing Factors for Wulingyuan Natural Heritage Management Performance Evaluation
    JIANG Cai-Fang, HU Hai-Mei
    journal6    2012, 33 (1): 104-106.   DOI: 10.3969/j.issn.1007-2985.2012.01.026
    Abstract2850)      PDF(pc) (323KB)(1872)       Save
    Based on the previous study and the system theory,the influencing factors for Wulingyua natural heritage management performance evaluation are as follows:satisfaction of residents,tourists and employees for the social performance;tourism economy,tourism employment,and local economic development for the economic performance;and ecological efficiency,manifestation and influences for the ecological performance.
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    Efficient Market Hypothesis,Informational Conditions and Social Welfare
    WANG Yue-Wu
    journal6    2012, 33 (1): 107-111.   DOI: 10.3969/j.issn.1007-2985.2012.01.027
    Abstract2585)      PDF(pc) (391KB)(1676)       Save
    The author analyzes the informational conditions in line with the efficiency of capital market,and reasons the relationship between the degree of capital market’s effiency and investors’ welfare based on the market general equilibrium theory.Then,some suggestions are put forward to improve the informational conditions for Chinese capital market.
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    On Functions and Tax Analysis of Business Software in Chain Supermarkets
    WU Dong-Feng
    journal6    2012, 33 (1): 112-115.   DOI: 10.3969/j.issn.1007-2985.2012.01.028
    Abstract2534)      PDF(pc) (1317KB)(1930)       Save
    Chain supermarkets have been developing rapidly due to their powerful and efficient sever (backstage)/POS (front end) of computer network marketing management system.However,almost all the business software of the supermarkets has installed tax-avoidance function or other supplementary designs to uncover the sales revenue to avoid tax.The thesis,by displaying the functions of the software,discusses the methods and measures to reform and improve the management of the business software in large chain supermarkets.
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    Pollution Prevention and Control of Rural Environment in Western Hunan Autonomous Prefecture——Thoughts Based on the Construction of the New Countryside
    LONG Jian-You
    journal6    2012, 33 (1): 116-119.   DOI: 10.3969/j.issn.1007-2985.2012.01.029
    Abstract4128)      PDF(pc) (397KB)(1879)       Save
    Based on the viewpoint of the new countryside construction,this paper analyzed both the urgency and the solution of the current rural environment pollution in Western Hunan autonomous prefecture.The main environment pollution problems as well as the restriction factor for pollution control are analyzed,before the corresponding prevention countermeasures are put forward.
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    Bibliometric Analysis of the Link Analysis from 2001 to 2010
    WANG Chuan-Lei, WANG Tao, WANG Ru-Zheng, GUAN Jing-Wen, SUN Hua
    journal6    2012, 33 (1): 120-125.   DOI: 10.3969/j.issn.1007-2985.2012.01.030
    Abstract2961)      PDF(pc) (417KB)(1453)       Save
    Using quantitative analysis of collected related literature on link analysis published on the core journal on CNKI,the published year,journal distribution,author,key words,research samples,link pointer,search tool and application field are analyzed,which provides reference for link analysis research and application.
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    Cultivation of  College Students’ Enterpreneurial Ability in Western Areas
    DING Lei, SU Xiao-Ling, QU Ying-Xin
    journal6    2012, 33 (1): 126-128.   DOI: 10.3969/j.issn.1007-2985.2012.01.031
    Abstract3096)      PDF(pc) (304KB)(1841)       Save
    It is one of research focuses how to improve the college students’ enterpreneurial ability,and it is even more significant to the western college students.This paper analyzed the relationship between perceived value and initiative spirit,introduces the key factors influeucing the initiative spirit,and put some suggestions as to promote college students’ enterpreneurial ability aiming at disadvantages of remoteness and laggard information in western area.
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    Auslander-Reiten Translations for Comodules
    ZHU Jia-Gui, LI Qi-Sheng, WEI Li-Juan
    journal6    2012, 33 (2): 1-6.   DOI: 10.3969/j.issn.1007-2985.2012.02.001
    Abstract2373)      PDF(pc) (361KB)(1895)       Save
    Let  Γ be a coalgebra over a field k.Further discussion of the functor  τ=DTr:MΓqc→ MΓqc is carried out,where MΓqc denotes the full subcategory of MΓ determined by the quasi-finitely copresented comodules.If  Γ is a semisimple coalgebra,it is proved that  the functor  τ:f.d.M〖TXX-〗Γqc→ f.d.M〖TX-〗Γqp is a categories equivalence,where M〖TXX-〗Γqc (MΓqp)  is the injectively (projectively) stable category and f.d.M〖TXX-〗Γqc(f.d.MΓqp) is the full subcategory of  M〖TXX-〗Γqc (M〖TX-〗Γqp) determined by the finite dimensional injective(projective) comodules.
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    On the Mean Value of Generalized Smarandache Summands  Function
    HUANG Wei
    journal6    2012, 33 (2): 7-9.   DOI: 10.3969/j.issn.1007-2985.2012.02.002
    Abstract2972)      PDF(pc) (228KB)(1626)       Save
    The main purpose of this paper is using the elementary method,analytic method and the properties of the Gauss function to study the mean value properties of AS〖JB((〗n,m,k〖JB))〗,and  give an interesting asymptotic formula for it.
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    Relative Productive Spaces in L-Topological Spaces and θ-Connectedness
    JIANG Jin-Ping, WANG Xiao-Xia
    journal6    2012, 33 (2): 10-12.   DOI: 10.3969/j.issn.1007-2985.2012.02.003
    Abstract2608)      PDF(pc) (254KB)(1685)       Save
    The relative product spaces are introduced by the generalized Zadeh function and the θ-connectedness is discussed in the relative product spaces of L-topological spaces.The product  of θ-connectedness to the relative product spaces is proved.That is,the relative product spaces are θ-connected if and only if each factor space is θ-connectedness.
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    Two Mistakes of Fuzzy Sets
    SU Fa-Hui
    journal6    2012, 33 (2): 13-15.   DOI: 10.3969/j.issn.1007-2985.2012.02.004
    Abstract2524)      PDF(pc) (266KB)(1784)       Save
    By examplification,it is shown that  L. A. Zadeh  improperly defined fuzzy sets with mapping and furthermore,he also incorrectly defined the join and intersection operations by selecting the maximal and minimal values.In fact,the fuzzy school knew the problem of selecting the values and they provide many arithmetic operators,especially the notions of t-and s-bound norms which are proven wrong.Therefore,it can be concluded that fuzzy-set theorists have not yet provided a reasonable definition for the join and intersection operations.
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    Ruin Probabilities in the Poisson-Geometric Risk Model Perturbed by Diffusion Under Heavy-Tailed Claims
    BAO Zhen-Hua, YIN Ming-E, ZHANG Shao-Hua
    journal6    2012, 33 (2): 16-18.   DOI: 10.3969/j.issn.1007-2985.2012.02.005
    Abstract3003)      PDF(pc) (265KB)(2231)       Save
    The compound Poisson-Geometric risk model is more appropriate for describing the case that risk event and claim event are not equivalent,so it has significant background in insurance practice.In this paper the authors investigate the Poisson-Geometric risk model perturbed by diffusion under heavy-tailed claims,and the asymptotic expression satisfied by the ruin probability is derived.The result obtained in the present paper is consistent with the classical risk model perturbed by diffusion.
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    Blow-up  Criterion of Classical Solution of Quasi-Geostrophic Equation
    CUI Wen-Hui
    journal6    2012, 33 (2): 19-23.   DOI: 10.3969/j.issn.1007-2985.2012.02.006
    Abstract3008)            Save
    The quasi-geostrophic equation is considered in this paper.A criterion is given for the finite time blow-up of a classical solution in terms of its small time behaviors along the trajectories.The result is deduced from a differential inequality for the reciprocal of the length of the gradient of the solution along a particle trajectories.The method and the result are similar to those of Chae on the 3 dimensional incompressible Euler system.The result gives some inspiration for the further research of quasi-geostrophic equation.
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    A Class of House  Prices Model Based on Multiple Regression
    LIN Wei, HE Ping, CAO Can
    journal6    2012, 33 (2): 24-27.   DOI: 10.3969/j.issn.1007-2985.2012.02.007
    Abstract2594)      PDF(pc) (361KB)(3289)       Save
    With SPSS software,this paper treated the four indexes used to measure house prices as the factors to affect the sales amount of the completed apartments of commercial houses.A price model was constructed based on the idea of multiple linear regression.It can be seen  that the residual cumulative probability plots are fluctuations around the baseline in the residual sequence of pure random test,the sample autocorrelation coefficient gradually decreases to zero,and basically there is no autocorrelation about residual series.
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    8-Error Linear Complexity of 2n-Periodic Balanced Binary Sequences
    ZHOU Jian-Qin, ZHAO Qi, CUI Hong-Cheng
    journal6    2012, 33 (2): 28-34.   DOI: 10.3969/j.issn.1007-2985.2012.02.008
    Abstract2551)      PDF(pc) (330KB)(1714)       Save
    The linear complexity and the k-error linear complexity of a sequence have been used as the important measurement of keystream sequence strength.By studying linear complexity of binary sequences with period 2n,based on Games-Chan algorithm,8-error linear complexity distribution of 2n-periodic binary sequences with linear complexity less than 2n is discussed.The complete counting functions on 2n-periodic balanced binary sequences with 8-error linear complexity 2n-2,2n-3,2n-4 and 2n-3-2n-j are derived respectively.
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    Realization of CIM Data Access Mechanism Based on FastDB
    CAO Yu-Lin
    journal6    2012, 33 (2): 35-40.   DOI: 10.3969/j.issn.1007-2985.2012.02.009
    Abstract3241)      PDF(pc) (349KB)(1676)       Save
    Starting from analyzing CIM data access mechanism,this paper expounds the methods of resource location,data inquiry,and data description in the process of data access.This research introduces the realization code of CIM data access interface Resource ID Service and Resource Query Service based on FastDB.The functions and ways to deal with the exceptional conditions are also explored.This way can make effective use of CPU period and memory,and to some extent,can realize the real-time data operation,which improve the exploitation,development and the maintainance of the system.
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