Table of Content

    15 September 2004, Volume 25 Issue 3
    Results of NSFC
    Necessary and Sufficient Conditions for Strongly Convergence of  Iterative Sequence of Asymptotically Pseudo-Contraction Mapping
    NI Ren-Xing
    journal6, 2004, 25(3):  1-5. 
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    Some necessary and sufficient conditions for strongly convergence of Ishikawa iterative sequence with random errors of fixed points for asymptotically pseudo-contraction mappings and asymptotically non-expansive mapping in real Banach spaces were given .The results include,extend,and improve some recent results given by Zhang Shi-sen,Liu Q H,etc.
    On the Second Power Mean of Dirichlet L-function
    GAO Li, Zhao-Zhen
    journal6, 2004, 25(3):  6-9. 
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    The main purpose of this paper is using the classical estimation of Kloostermann sum and the analytic method to study the second power mean of Dirichlet L-functions with the weight of general Kloostermann sums,and give an interesting second mean value theorem.
    A Universal Method of Analysis And Research on Fault Diagnosis for Nonlinear Dynamic Networks
    XIE Hong, HE Yi-Gang, LI Yi-Fu, WEN Zheng-Quan
    journal6, 2004, 25(3):  10-14. 
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    By using method of canonical piece-wise linearization and fundamental knowledge of circuit theory,a set of canonical piece-wise-linear equations for nonlinear dynamic networks is presented.This analysis method neednt calculate the time when the response crosses a boundary.The another advantage of this method is that the calculation of dynamic response is converted to algebraic recursive computation.Because the dynamic response can easily be resolved by computer simulation,a basic idea of fault diagnosis method of nonlinear dynamic networks based on wavelet-neural network is also briefly decribed.
    One Dimensional Simulation of Mold Filling in PowderInjection Molding
    LI Mao, XIE Gui-Liang, CAI Hai-Tao
    journal6, 2004, 25(3):  15-17. 
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    The filling of strip mold with thin wall cavity is simplified as one dimensional problem,a routine is worked out for the numerical simulation of the field variables such as temperature and velocity,and valuable results are generated for the mold filling process including the moving front and the datas of coupling fields.
    Security Control System of Distributed Application Software Based on Extended Client/Server Model
    NING Wei, ZHANG Bo, XU Shi-He, YU Yong-Chun
    journal6, 2004, 25(3):  18-22. 
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    By combining three-tier Client/Server application software security control system model, this paper puts forward a kind of security control system model of distributed application software based on extended Client/Server, adds application interface tier and data interface tier to original model, and screens fuzzy boundary between the tiers in the original model. This design makes every logical tier change alone, and helps to build model of architecture and to implement consistency of the system, further strengthens the retractility and flexibility of distributed application, then designs the frame of the security control system by using the model based on four-tier Client/Server. Finally, the security verification is implemented on Web by using extended Web server of the system.
    The Ferns in Arsenic-Rich Areas in Shimen County of Hunan Province——Vegetation Restoration in Polluted Environment in Arsenic-Rich Areas
    YAN Yue-Hong, CHEN Hong-Feng, LI Chang-Han, HUANG Zhong-Liang, XING Fu-Wu
    journal6, 2004, 25(3):  23-28. 
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    Base on our recent study,22 species of ferns and their companion plants in an arsenic-rich area in Hunan are reported in this paper.And the analyses on the systematic relationship,frequence and abundance,and the adaptability of these ferns are given in order to find more arsenic-accumulating ferns.The result shows that there is a little more species in Pteridoid series,Thelypteridoid-Asplenioid series and Dryopterioid series than that in the other groups.The species with higher abundance and higher frequence in the arsenic-rich area are Pteris vittata,P.multifida,Cyclosorus acuminatus and Cyrtomium fortunei.The growth relationship and the biohabits of the ferns in the arsenic-rich areas of in Shimen and other reported arsenic-accumulating ferns show that there are new arsenic accumulation in Pteridoid series.
    Doctoral Forum
    A Novel Multi-OROLAP Model and its Optimization Algorithms
    WANG Guo-Jun, CAO Jian-Nong, CHEN Zhen-Chong
    journal6, 2004, 25(3):  29-35. 
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    OLAP model is the foundation for implementing efficient on-line analysis processing,data mining and advanced business intelligence applications.ROLAP,MOLAP and OOLAP models are well known models in the current data warehousing and business intelligence research areas.In this paper,the authors propose a novel multi-data warehouse model called Multi-OROLAP model based on multicast services,which has the advantages such as scalability,efficient computation,and distributability.The authors focus on the Multi-OROLAP model and algorithms used within this model,including the incremental refreshing algorithms for data warehouses,storage optimization algorithms,transparent exchange algorithms,and adaptive selection algorithms for main and secondary memory objects.Typical user query and analysis patterns and their performance impact on the Multi-OROLAP model and algorithms,group membership management and maintenance of multi-data warehouses are also discussed.
    Existence of Positive Periodic Solutions for  Competitive   Multi-Species Lotka-Volterra Defference System with Variable Delays
    JIANG Li-Qun
    journal6, 2004, 25(3):  36-39. 
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    The author considers a periodic competitive multi-species Lotka-Volterra difference  system with variable delays.A sufficient condition is obtained about the existence  of positive periodic solutions of this system by using the method of coincidence degree.
    Water Diffusion Rates of Marsh Soils From Saline-Alkalined Wetlands
    BAI Jun-Hong, WANG Qing-Gai
    journal6, 2004, 25(3):  40-43. 
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    The processes of water diffusion in non-saturated soils and the relationship between water diffusion rates and water contents were simulated by horizontal soil columns from saline-alkalined wetland in Xianghai National Natural Reserve. The results showed that water diffusion rates of saline-alkaline soils were lower. water diffusion rate in the layer of 10~20 cm was lower than that in other layers; they were higher for water diffusion rates in bottom layers than those in upper ones; and water diffusion rates increased by exponential with the increase of water content, moreover, the increase curves of top soils were steeper.
    Study on the New Technology of Dedusting and Desulfurization of Flue Gas From Coal-Burning Boiler
    LI Cai-Ting, TAN Ya, QIU Hui, WEI Xian-Xun, ZENG Guang-Ming, WANG Li-Ping
    journal6, 2004, 25(3):  44-46. 
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    According to the principle of venturi tube,a technology and equipment of dedusting and desulfurization of flue gas from coal-buring boiler by integrating a wet process with a cyclone is designed.The structure trait,the working principle and the important aspects of industrial applications of this unit are introduced.The results of industrial applications show that the dedusting efficiency is more than 97%, and the desulfurization efficiency reaches 75% with a resistance less than 1 200 Pa.
    Serial Number Intelligent Inspection and Recognition Method in X-Ray Negative
    TANG Sheng-Xue, LIU Bo-Feng, ZENG Qing-Li
    journal6, 2004, 25(3):  47-50. 
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    A serial number location segmentation and recognition method based on template matching and neural network in X-ray negative is proposed. The low-quality and blur serial number character in X-ray negative can be inspected and recognized effectively and the recognition ratio can come to 92 percent and the process is less than 1 s.
    Key disciplines
    The Sufficient Condition of the Generalized Sub-Diagonally Dominant Matrices
    HE Xiao-Fei
    journal6, 2004, 25(3):  51-55. 
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    By using on the sufficient conditions of  the generalized diagonally dominant matrices,the author gives some sufficient conditions for judging generalized sub-diagonally dominant matrices.
    The Principle and Design of Buoyancy Balance for Measuring Little Mass Change of a Body
    LI De-Jun, CHEN Bing-Quan
    journal6, 2004, 25(3):  56-59. 
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    According to the principle of the interference of two beams and the buoyancy law,the principle and design of one buoyancy balance for measuring little mass change of a body is discussed.The result shows that sense quantity,sensitivity,maximal load,and accuracy rating of the buoyancy balance are superior to the current balance,and the buoyancy balance has wide-ranging applied domain.
    The Study of Phase Transition of Magnetorheological Fluids
    WANG Xiao-Yun, ZHAO He-Ping, YAN Lin, YAN Xiao-Hong
    journal6, 2004, 25(3):  60-63. 
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    The free energy of magnetorheological (MR) fluids is calculated basing on the model of simple dipoles,the osmotic pressure of the system is considered,the phase transition of MR fluids is studied.The results show that Magnetorhiological Fluids expriences a liquid phase to a solid phase when the applied magnetic field exceeds critical magnetic field.In addition,the phase transition can occur with the change of temperature.
    Preparation and Characterization of LiFePO4/C as Cathode Material for Lithium Ion Batteries
    MA Ming-You
    journal6, 2004, 25(3):  64-67. 
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    LiFePO4/C composite cathode materials for lithium-ion battery were synthesized by sol-gel method, and characterized by element analysis,X-ray diffraction (XRD), scanning electron microscopy (SEM). The electrochemical properties were tested using analogous cells. Results showed that LiFePO4/C were simple pure olive-type phase with uniform particle size of 1μm. LiFePO4/C showed a good charge-discharge voltage plateau at 3.4 V and higher capacity and better cyclability compared with LiFePO4.The first specific discharge capacities were 133 mAh/g, and 93.8% of which retained  after 20 times cycling at 60 ℃.
    Browder Fixed Point Theorem in Noncompact Spaces and Their Applications
    WEN Kai-Ting
    journal6, 2004, 25(3):  68-71. 
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    In the noncompact admissible subsets of noncompact hyperconvex metric spaces,Browder fixed point theorem is improved and generalized  and Ky Fan minimax inequality is studied.As to application,two new existence theorems of Nash equilibrium of the non-cooperative n-person game are given.
    Physics and electronics
    Effective Dielectric Constant by Numerical Simulation Method in Array Carbon Nanotube
    TANG Bing-Shu, XU Jian-Liang
    journal6, 2004, 25(3):  72-74. 
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    The effective dielectric constant of single Carbon Nanotube is first calculated,then the On-shell method is applied to calculating the effective dielectric constant of two-dimensional crystal in array Carbon Nanotube.The results even more closely approximate to the experimental data compared with Maxwell-Garnett Method.
    Image Restoration Based on Wavelet-Domain Hidden Markov Tree Model
    ZHANG Mei-Hua, WANG Xue-Lin
    journal6, 2004, 25(3):  75-78. 
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    Wavelet-domain HMT models the dependencies of multiscale wavelet coefficients through the state probabilities of the wavelet coefficients,whose distribution densities can be approximated by the Gaussian mixture model.The algorithm presented in this paper specifies the prior distribution of the real-world image through wavelet-domain HMT model and converts the restoration problem to an constrained optimization one which can be solved with the conjugate gradient method.Experimental results show that the algorithm properly retrieves various kinds of edges and the PSNR and subjective visual effect of the restored images are improved significantly.
    Chemistry and chemical engineering
    Determination of Heavy Metals and Their States in the Soil of Handan
    XU Wen-Feng, KANG Lian-Wei, HE Zhong-Qing
    journal6, 2004, 25(3):  79-80. 
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    The contents of heavy mentals Cr,Cu,Ni,Pb,Zn,Mn in the suburb of Handan were determined and the states of these heavy metals were studied.The results show the contents and the accumulating situation of heavy metals in cities,and so lay the scientific foundation to prevent environmental pollution and safeguard human health.
    Medical Science
    Analysis of Respiratory  Rate and Oxygenation Index in Patients Receiving Post-Operation Mechanical Ventilation
    XU Ying, LUO Rong-Hua
    journal6, 2004, 25(3):  81-83. 
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    To discuss the reasons of respiratory function failure,the authors observed the spontaneous breath of 19 patients who received mechanical ventilation(Control Mode) due to acute respiratory functiron failure from chest operation and epigastrium operation,and analyzed the correlation of the oxygenation index (PaO2/FiO2) and the ratio of spontaneous breath surpassing control rate(PPsuper).The results showed the effect of oxygenation on the spontaneous breath rate in patients with respiratory function failure from chest operation and epigastrium operatior,the negative correlation between PaO2 and PPsuper (r=-0.575),the negative correlation between PaO2/FiO2 and RRsuper(r=-0.571) and no correlation between PaCO2 and RRsuper.
    Arrangment of the Page of Contents of Sci-Tech Periodicals
    HE Xiao
    journal6, 2004, 25(3):  84-86. 
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    By studying the arrangement of the pages of contents of 100 scientific and technological periodicals in China,the author analyses the arranging problems and introduces the composition of the page of contents.In order to standardize the arrangement,the author puts forward some suggestions,that is,according to the characteristics of the publication,choose the arranging format to make the arrangement rational,standard,and scientific.
    Scientific research bulletin
    Study of the Function of Some Substances on M.Tuberculosis by Oxygen Biosensor
    ZHAO Jian-Wen, YI Song-Lin
    journal6, 2004, 25(3):  87-89. 
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    The function of some substances on M.tuberculosis,such as glucose,oleic acid,stearic acid,undecylenic acid,linoleic acid,Tween-80,Tween-60 and Polyoxythylene stearate (POES),were investigated by using oxygen biosensor.The results indicated that the mixture of bovine serum albumin (BSA)-oleic acid and glucose could rapidly stimulate the growth of M.tuberculosis,and the optimum was 5% and 1% respectively.
    Plasma Exchange of Artificial Liver Support Systems on 30 Cases of Severe Hepatitis
    XU Xiao-Ping, QU Zhang-Shu, TENG Yan-Ting, PENG Jing, PENG Zhi-Xiang, YANG Rong-Qiang, CAO Ze-Tao
    journal6, 2004, 25(3):  90-92. 
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    To evaluate plasma exchange of Artificial Liver Support Systems (abbreviated to ALSS) on Severe Hepatitis (abbreviated to SH).Method  30 patients with SH were estimated,undergoing plasma exchange of ALSS 51 times on the base of routine treatment.Analyze statistically the changes of their hepatic function,serum ammonia,prothrombin time (abbreviated to PT),platelet count (abbreviated to PC),etc.,before and after the therapy.Compare the cases to 31 controlled ones with SH who didnt receive ALSS before this technology being  applied in our hospital two years ago.Result  After the plasma exchange,the 30 cases got better hepatic function obviously.Many indexes were markedly improved,such as TBIL,DBIL,ALT,AST,serum ammonia,PT,PC and so on.Statistics analysis of them by U-test indicates remarkable contrast before and after the treatment (P<0.001).Meanwhile,it suggests significant differences between the two groups by performing x2-test for clinical curative rate,mending rate,and mortality rate (P<0.025).Conclusion  Plasma exchange on SH shows distinct shortdated theraputic effect.It can quickly eliminate excessive TBIL,ammonia etc.Coagulation factors reinforced betimes,thus bleeding tendency ameliorated soon.Mortality rate descended notably.Plasma exchange of ALSS is an important and effective measure and means great value on saving patients with SH.
    The Three New Species of Cobitidae From Yunnan,China
    LI Wei-Xian
    journal6, 2004, 25(3):  93-96. 
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    The paper gives descriptions of the three new species inCobitidae (Noemacheilinae and Cobitinae ) collected from Shilin County Yunnan Province,China.The new species are named respectively after the places where they have been collected:Tripslophysa Xiangshuiqingensis Li,sp nov;Yunnanilus bajingensis Li,sp nov;and Paralepidocephalus guishanensis Li,sp nov.All type specimens are deposited in the Heilongtan Reservoir of Shilin Yunnan,China.
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