Table of Content

    25 May 2006, Volume 27 Issue 3
    Uniqueness of Approximation in Lp(μ,X)
    LUO Xian-Fa, WANG Lan-Fang, FANG Dong-Hui
    journal6, 2006, 27(3):  1-3. 
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    Let X be a Banach space and Y a closed convex subset of X containing the original.The following is the main result of this paper:Lp(μ,Y) is a Chebyshev subset of Lp(μ,X) (1<p<∞) if and only if L1(μ,Y) is a Chebyshev subset of L1(μ,X).In addition,this paper gives an example to show that the conclusion “that g is a best approximation to f∈L∞(μ,X) from L∞(μ,Y) implies g(s)∈ PY(f(s)) for almost all s∈Ω” is not true.
    Stability for a Class of Delay Differential Algebraic Equations
    XIAO Fei-Yan, CAO Xue-Nian
    journal6, 2006, 27(3):  4-6. 
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    A question class K(A)α,β,γ and its stability and asympotic stability are researed.Sufficient conditions of stability and asymptotic stability on the questions are also obtained respectively.
    On the Diophantine Equation x3±23m=3Dy2
    LE Mao-Hua
    journal6, 2006, 27(3):  7-7. 
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    Let m be a positive integer,and D be a positive integer with square free.It is proved that if m>1 and D is not divisible by 3 or primes of the form 6k+1,then the equation x3±23m=3Dy2has no positive integer solutions (x,y) with gcd(x,y)=1.
    Asymptoticity of the Intermediate Point in the Mean Value Theorem of Integrals
    LIU Chang-Mao
    journal6, 2006, 27(3):  8-11. 
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    Suppose function f(t) be continuous in [a,x],and n the order differentiable at point a,and f(n)(a)≠0 then ξx in mean value theorem of integration satisfies lim x→a {f′(a)[(ξx-a)/((x-a)n)-1/2·1/((x-a)n-1)]+(f″(a))/(2!)[((ξx-a)2/((x-a)n)-1/3·1/((x-a)n-2)]+…+(f(n)(a))/(n!)[((ξx-a)n)/((x-a)n)-1/(n+1)]}=0.
    A Set of Sufficient Conditions for Nonsingular H-matrices
    HUANG Zheng
    journal6, 2006, 27(3):  12-14. 
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    We obtain a set of new sufficient conditions for nonsingular H-matrices by using some subclasses of H-matrices,in particular,which are described by simple functions of matrix elements only.
    Continuous Dependence on Parameter for the Generalized Maxwell-Cattaneo System
    QUE Cheng-Long, LUAN Wen-Yun
    journal6, 2006, 27(3):  15-18. 
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    The authors establish continuous dependence of the heat flux and temperature on  parameter in aninitial-boundary value problem for the generalized Maxwell-Cattaneo system of heat conduction at low temperature.
    A New Method for the Time Series Extrapolation of Polynomial-Fitting
    FAN Qiang, PENG Hong
    journal6, 2006, 27(3):  19-22. 
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    With functional characterization of polynomial-fitting on time series,the algorithm maps the values of time series onto the eigenvector space of polynomial coefficients,based on which the author measure the similarity of the time series using Euclidean-alike distance,thus extrapolating the time series.The result achieves fine result and proves that this method is more precise and more stable than traditional models.
    Martingale Pricing of the European Up-and-In Calls Under the Models of Stock Price Fluctuation
    ZHU Dan
    journal6, 2006, 27(3):  23-26. 
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    Under the models of stock price fluctuation the author gets the pricing formula of the European Up-and-In Calls by means of Martingale approach (risk-neutral valuation),especially,the pricing formula under the models of lognormal distribution.
    Immune-B:The Design of Cytokine Networks Model of Immunology
    ZOU Sheng-Rong, YANG Xue-Ping, GUO Feng, WANG Kai, WANG Jin-Jin, GU Xiao-Shi
    journal6, 2006, 27(3):  27-32. 
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    A formalized model of T-cell cytokine networks is set up by using B method.Based on this model,it is achieved to run verification with VC program and to compare the dynamic behavior of the model to actual experimental data from College of Animal Science and Veterinary Medicine.The results show that the use of  Immune-B method can help confront open questions in immunology and probably in other fields of biology,which,because of their complexity,cannot be addressed by standard laboratory techniques alone.
    Improving the Security of Web Service with Security Token
    YIN Xiang-Dong, CHEN Xu-Ri
    journal6, 2006, 27(3):  33-36. 
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    The existent security agreement and Web service communication agreement can be bound together,and the security function of extensible markup language  text can be guaranteed through the issue and gain of the token,thus the security function of Web service can also be improved.
    Delphi and Assembler Language Mix Programming
    XIANG Ji-Wen, LIU Xin, ZHANG Yong-Hua, PENG Shan-Qiong, ZHANG Bang-Ying
    journal6, 2006, 27(3):  37-39. 
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    It is an important direction of the software development technology to use many kinds of languages into mix programming flexibly.This paper discusses in detail the method about Delphi and assembler language mix programming,then provides an application example.Mix programming method can exert fully each advantage,the Delphi being object-oriented,visual and the assembler language taking little memory and carrying fast.This method can well improve the performance of the software.
    Application of Certificate Chaining in Key Management of Ad Hoc Network
    ZHANG Bin-Lian, TANG Wen-Sheng, XU Hong-Zhi
    journal6, 2006, 27(3):  40-42. 
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    The ad hoc network is a mobile self-organized network composed of a set of radio automatic nodes or terminals.Its target applications include battlefield communication or no fixed base station.The nature of ad hoc set challenges on security.Certificate chaining is a technique using in mobile ad hoc key management.This paper expatiates the usage of certificate chaining in key management,and analyzes the principles on designing confidence value in certificate chaining.
    Physics and electronics
    The Detection of The signal DTMF Based on DSP
    LI Yi-Fu, PENG Wei-Shao
    journal6, 2006, 27(3):  43-47. 
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    The Dual Tone Multi-Frequency DTMF is the dialing signal in the new generation of telephone.It is a worthy engineering application to gather DTMF detection to the Digital Signal Processor system.This article puts forward a scheme to implement Goertzel algorithms and DTMF detection in the use of a Texas Instruments C6711 floating point DSP.DTMF detection is performed using 20 parallel Goertzel filters,which makes the detecting accurate,quick and simple.It is proved that precision of detected system has been improved greatly by resonance sound detection.
    Multi-Channel CSMA System with QoS Priority Control
    LIANG Ping-Yuan, HUANG Guo-Sheng, LIU Xin
    journal6, 2006, 27(3):  48-51. 
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    Model of detecting multi-channel system with priority control which provides quality of services (QoS) is built.At the same time,the change of the system status and throughput and delay are analyzed in mathematics.During the analysis,reply-delays are considered and the results are discussed.
    The Multiphase Sinusoidal Oscillators Based on Current Feedback Amplifier
    PENG Liang-Yu, ZHANG Chun-Xi, HE Yi-Gang, HUANG Man-Chi
    journal6, 2006, 27(3):  52-54. 
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    The design of even multiphase sinusoidal oscillators using current feedback amplifier is presented.The oscillator can generate arbitary even sinusoidal signals,which are equal in amplitude and equally spaced in phase.Simulated results of three-phase and five-phase oscillators are given to verify the theoretical analysis.
    The Ground Settlement of Excavation Engineering Analysis Based on 3-D FEM
    SUN Zhi, LUO Sheng-Yun, FAN Yong-Fa
    journal6, 2006, 27(3):  55-56. 
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    Finite element method (FEM) was used to analyse the distributing type,step-excavation effect and spatial effect of ground settlement around the excavation,and the results calculated with 3-D FEM and 2-D FEM were compared.Finally,some useful conclutions are obtained to direct the engineering practice.
    The Ground Settlement of Excavation Engineering Analysis Based on 3-D FEM
    XIE Di-Min, ZHOU Lin-Xia
    journal6, 2006, 27(3):  57-61. 
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    Finite element method (FEM) was used to analyse the distributing type,step-excavation effect and spatial effect of ground settlement around the excavation,and the results calculated with 3-D FEM and 2-D FEM were compared.Finally,some useful conclutions are obtained to direct the engineering practice.
    Ecotype Heating Economic Optimization Analysis of Energy System for Fossil Fuel Power Plants
    ZHANG Fu-Ren
    journal6, 2006, 27(3):  62-66. 
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    This paper analyses energy economy efficiency (Yong efficiency) of thermal system of fossil fuel power plants(FFPPs) roundly.At the same time,based on the green zoology protection point,the calculating model of zoology efficiency has been analysed.From System-Green-Yong-Economic-Coefficient,and taking the lowest cost of generate electricity as springboard,this paper establishes the optimization formula of System-Green-Yong-Economic-Coefficient.Taking the benefit of superaddition invest of components as object,components,which need ameliorating,are ascertained.At the same time,the synthetical coefficient function of which are established.
    Application  Statistical Analysis Method in the Study of the Plant Electrical Signal
    WANG Lan-Zhou, LI Hai-Xia, LIN Min, LI Jiao, LI Yi-Xing
    journal6, 2006, 27(3):  67-70. 
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    The plant electrical signal is a kind of complicated signal,and the traditional electrophysiological method couldn’t get more useful message from it. This article analyzes the plant electrical signal in time domain and frequency domain by using the statistical analysis method.The plant electrical signal is a kind of random and micro signal,and its amplitude value is in the μV magnitude.It varies acutely with the time,and in different time,its relativity is weak.It is a low-frequency signal,and its power spectrum mostly distributes in the less than 5Hz frequency range.
    Numerical Study on the Transmission Coefficient of One-Dimensional DualPhotonic Crystal in Visible Region
    TANG Bing-Shu, LIU Li-Li, DING Hong-Xing, ZHOU Yan-Wei, XU Jian-Liang-
    journal6, 2006, 27(3):  71-74. 
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    This paper applies transfer matrix method to calculate transmission coefficient of one-dimensional dual photonic crystal numerically simulating the effects of many factors on the transmission spectrum of one-dimensional dual photonic crystal.The results show that the factors are the refractive index,thick ness,layer number of one-dimensional dual photonic crystal,polarization and incident angle of incident ray.
    Biological resources
    Transmission Characteristics of Cucumber Mosaic Virus-XJ by Myzus Persicae
    ZHENG Guang-Yu
    journal6, 2006, 27(3):  75-77. 
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    The research of regularity for transmission of cucumber mosaic virus-XJ by Myzus persicae was carried out.30s was long enough for Myzus persicae to acquire CMV-XJ from infected plants,acquisition rate increased with longer acquisition time;as the acquisition time was more than 70 s,acquisition rate attained to 100%.The transmission time threshold for the aphid was 0.25 h and the transmission rate increased with the time over the time threshold;as the feeding time on Cucurbita pepo of viruliferous aphid was over 2 h,the transmission rate was up to 100%.The virus could be transmitted even by one Myzus persicae,and the transmission rate increased with the number of vectors per plant;as the number of aphid per plant was more than 15,transmission rate was up to 100%.These results indicate that Myzus persicae can transmit cucumber mosaic virus-XJ with high efficiency.
    Changes of Phenylalanine Ammonialyase and Chlorophyll in Muskmelon Plants Infected by CMV-Xinjiang Isolate
    ZHAO Rong-Le
    journal6, 2006, 27(3):  78-81. 
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    Changes of phenylalanine ammonialyase and chlorophyll in muskmelon cultivars of different resistance to cucumber mosaic virus-XJ (CMV-XJ) were investigated.Compared with healthy control,the enzyme activity increased in all infected muskmelon plants,but the increase in enzyme activity for resistant cultivar “Xinyu” was two times of that for susceptible cultivar “Wangwenxiang” and the peak of enzyme activity for “Xinyu” appeared 12 days earlier,that is bigger increase range of enzyme activity and earlier enzyme activity peak for resistant cultivar.But the change of chlorophyll was negatively related with the resistance to the virus;after infection by CMV-XJ,the chlorophyll content of resistant cultivar “Xinyu” is not different significantly from that of the healthy control,but the chlorophyll content of susceptible cultivar “Wangwenxiang” decreased  by 62.9% compared with the healthy control.There is regular relation between resistance of the muskmelon cultivar and changes of phenylalanine ammonilyase and chlorophyll after infection by CMV-XJ.The regularity can be used as the biological criterion for the determination of susceptibility and resistance to CMV-XJ for muskmelon cultivars.
    Wild Ornamental Plant Resources in West Hunan and Their Application to Gardening
    GONG Shuang-Jiao, CHEN Gong-Xi
    journal6, 2006, 27(3):  82-86. 
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    The authors investigated the diversity,distribution pattern and viewing importance of wild ornamental plants in west Hunan.The results showed that,in this zone,there are totally 323 species of recorded wild ornamental plants,which belong to 127 families,234 genuses,including 21 of fern,11 of gymnosperm,248 of dicotyledonous and 38 of monocotyledon.Based on the species,flora composition and characteristics,exploitation and protection status of these wild ornamental plants,the potentials of sustainable exploitation and utilization for wild ornamental plants in west Hunan were discussed.
    The Function of Biotope in Eco-city Renewal and Its Construction
    FENG Guo-Lu, XIANG Xiao-Qi
    journal6, 2006, 27(3):  87-89. 
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    In this paper,the concept of biotope and the effect of biotope on urban ecological regeneration were introduced,the general ways of the construction of urban biotope was discussed:(1) taken full advantage of the native biotope left in the city;(2) broken through the traditional patterns of land utilization in modern cities to form a city ecological base;(3) built up a network of urban biotope;(4) made full use of new technologies in ecological landscaping;(5) encouraged people to participate in the construction of biotope.
    Artificial Breeding Andrias Davianus In WuLin Mountain Area
    BAI Hong-Qing
    journal6, 2006, 27(3):  90-92. 
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    This article reports using the bottom water of the reservoir to breed andrias davianus in WuLin Mountain area for one year.This method can achieve 100% survival rate,average 1.92 kg/fish eight increase,2.23 conversion rate of food,and 6.2/month frenquecy of ingestion food,september to december being the main period of ingestion food.
    Change of the  Surface Water Quality in Wulingyuan Scenic Spot  After the House Dismantling
    WANG Li-Xin, HUANG Xue-Feng
    journal6, 2006, 27(3):  93-96. 
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    After the house dismantling,the water quality in Wulingyuan scenic spot has been monitored.The results show that due to the reception areas,the scattered households,and the toikts in the scenic spot,the discharge capacity after dismantling has not decreased obviously,so the water quality drops.Because of the limited capacity of the water body in the scenic spot,it is impossible to hod the outsice pollution.When the Sewage Treatment Plant of Zhangjiajie National Forest Park is built up,the surface water quality in the scenic spot will be improved to some extent but it is difficult to resume the national standard-one grade level.Therefore,the reception areas and the scattered households in the
    scenic spot must be moved outside,and the ecological-type toilets must be applied.
    Chemistry and chemical engineering
    Applications of Quantum Chemistry Principles in Research of Li-Ion Batteries
    MA Ming-You, HE Ze-Qiang, XIONG Li-Zhi, XIAO Zhuo-Bing, WU Xian-Ming, HUANG Ke-Long
    journal6, 2006, 27(3):  97-105. 
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    The development of lithium ion batteries is strongly dependent on the properties of related materials used.It is urgent for material scientists to design a new materials theoretically in order to achieve the properties required for a given appilication and to interpret theoretically the phenomena taking place during the charge and discharge cycles such as capacity fading.In principle,it is possible with the devolopment of quantum chemistry and computing technology.In this paper,the recent applications of quantum chemistry principles in research of lithium ion batteries was reviewed.The prediction of the average voltage to intercalate lithium in various electrode materials,the mechnism of lithium intercalation and deintercalation,distortion of cathode materials used and calculations of many other physical and/or chemical properties are reviewed specially.
    Preparation and Electrochemical Properties of Nano-SnO2
    XIAO Zhuo-Bing, LIU Wen-Ping, MA Ming-You, CHEN Shang
    journal6, 2006, 27(3):  106-109. 
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    Nano-SnO2 was prepared by  using inorganic salt as precursor materials through sol-gel method and characterized by thermogravimetric analysis and differential thermal analysis(TG-DTA),X-ray diffraction(XRD) and scanning electron microscope(SEM).Results indicate that well-crystallized nano-SnO2  about 92 nm can be obtained by annealing at 500 ℃ for 3 h.The electrochemical properties of nano-SnO2 as anode material for lithium ion batteries were studied.It is shown that nano-SnO2 would be an potential anode material for lithium ion batteries with high reversible capacity(more than 687 mAh·g-1) and low voltage plateau(0.2~0.5 V) for Li+ intercalation and deintercalation.
    Absorption and Separation of the Yellow Pigment from Oenothera Biennis L.with the Resin of DS-401
    CHEN Xiao-Yuan, ZHANG Ai-Hua, OUYang-Hui , FU Wen-Bin, LI Guang-Min
    journal6, 2006, 27(3):  110-112. 
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    Absorption and separation of the yellow pigment from Oenothera biennis macroreticular resin were studied.Comparative studies of five resins(D-101,DA-201,DM-301,DS-401,X-5)showed that DS-401 resin had the best effect on absorption of the yellow pigment from Oenothera biennis L.Results of effects on desorption of different concentration ethanol and solvent with DS-401 resin as absorbent showed that acetone and ethylethamoate had good effect on desorption.
    Extraction and Application of Flavonoid from Pueraria Lobata
    LI Hong-Xiong, PENG Zhi-Yuan, ZOU Hai-Ying
    journal6, 2006, 27(3):  113-116. 
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    Orthogonal experimental design was adopted to optimize the method for extraction of pueraria flavonoid from pueraria lobata.The results indicated that the optimal extraction condition was 5-fold volume of 90% alcohol,refluxing extraction for 2 h,and extraction for 3 times.The extraction yield of general flavonoid was 7.43%.Qualitative experiment showed that the main flavonoid compounds from pueraria lobata were isoflavone compounds.Pueraria flavonoid can be developed into herbal drugs for the treatment of cardiovascular diseases or the relevant health food.
    Determination of Puerarin in Xingmaitong Drop Pills by HPLC
    PENG Yong-Mei, HE Yong-Mei
    journal6, 2006, 27(3):  117-118. 
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    Objective To establish a method for determination of Puerarin in xingmaitong.Method HPLC was used,the separation was performed on Luna  C18 (5 μg,250 mm×4.6 mm)  column,a  mixture of  methanol-water(25∶75) was servered  as the mobile phase,and the  detecting wavelength was at 2 250 nm.Results The linearity range was from 4.16~83.2 mg/L,and the mean recovery was 100.84%,RSD 1.06%.Conclusion The method is simple,accurate and good for the determination of Puerarin in Xingmaitong,and it can be used for quality control for Xingmaitong.
    Studies on Zinc-System Phosphate Solution at Room Temperature
    Li-Cheng-Yong, YAN Ke-Qin, WANG Wei-Huan
    journal6, 2006, 27(3):  119-121. 
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    A new zinc-system phosphate solution is used for steel surface pretreatment before plating between 5 ℃ and 40 ℃.This phosphate solution is made up of ZnO,H3PO4,Zn(NO3)2·6H2O,filming agent and accelerant solution.The film is well-proportioned and compact.At the same time,the film ’s corrosion and attachment are good.Its weight is up to 2.9 gram per square meter.
    Analysis on Financing Function from Institutional Economics
    WANG Yue-Wu
    journal6, 2006, 27(3):  122-125. 
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    Enterprise can be considered as a productive or technical organization,a mechanism to promote and adjust the scarcity-value of economical goods,and a special carrier of the union of property rights and “team production”,which describe its natures from three different beddings.On these beddings,actually its activities are executed through different sorts of transactions,so it can be comprehended as “an intensive institution of transactions”.Accordingly,enterprises’ financing activities are performed through bargaining transactions,managerial transactions,and rationing transactions,taking shape three forms or mechanisms of allocating its financial resources,performing actual functions of financing operating,financing managing,and financing governing,which make up jointly the basic financing function,namely,allocating financial resources.
    Library and Information
    Development of Information Resources of Scientific and Technological Archives in Universities
    ZHOU Cai-Yun, YANG Fan, GU Yu-Chun
    journal6, 2006, 27(3):  126-128. 
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    The author studies the actual state of information resources of scientific and technological archives (STA) in universities,and then explores the significance,necessity and measurements to develop these resources.The study is beneficial to the information tasks of STA in universities.
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