Volume 27,Issue 12,2004 Table of Contents

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  • 1  Error Analysis and Modification of Virtual Instrument System
    JIN Tao JI Zhong QIN Shu-ren
    2004, 27(12):1-4.
    [Abstract](994) [HTML](0) [PDF 414.30 K](524)
    Abstract:
    The errors of each parts of virtual instrument system, which are produced in the signals transfer process, are introduced. These errors include sensor error, signal conditioning error, data acquisition error and data dealing error, etc. The main error can be found by analyzing the influence of these errors on different virtual instrument system. The methods of errors modification are also discussed. It's an effective method that modifying system errors, especially nonlinear errors, by software. At last, as a good example, the error analysis and modification of Virtual Noise Analysis Instrument is given.
    2  Building Model of Road Roughness
    CHANG Zhi-quan LUO Hong CHU Zhi-gang DENG Zhao-xiangongqing China)
    2004, 27(12):5-8.
    [Abstract](1380) [HTML](0) [PDF 308.65 K](279)
    Abstract:
    The input model of road roughness is one key element in the study of comfortable performance of vehicle. A model of road roughness, named Partial Wave Adding model, is theoretically analyzed and studied in detail. Based on the mathematical model, digital simulation of road roughness is studied. The simulation results show that the model is an easily actualized model and has universal adaptability.
    3  Evaluation Methods for Motorcycle Riding Comfort
    LI Jun-peng~
    2004, 27(12):9-12.
    [Abstract](844) [HTML](0) [PDF 305.19 K](458)
    Abstract:
    通过对ISO2631,GB4970-96,GB7927-87等标准的研究,根据人体感受特性曲线,提出了摩托车乘骑舒适性的两种评价方法--客观评价法和主观评价法.其中客观评价法的评价指标采用加权加速度均方根值,它给出了乘骑舒适性的定量评价;主观评价法则基于对大量实测乘骑人员主观评价的统计,给出相对比较主观的评定.两种评价方法相结合,对摩托车乘骑舒适性进行全面的评价.
    4  PDA Based Virtual Instrument
    WANG Jian JIN Tao QIN Shu-ren
    2004, 27(12):13-16.
    [Abstract](565) [HTML](0) [PDF 385.00 K](222)
    Abstract:
    Test and Measurement task can be done without limit of time and space by PDA with virtual instrument technology. The structure of PDA based virtual instrument is described firstly. Then PMDS(PDA Measurement Develop System) which can construct virtual instruments efficiently using component technology is introduced, it can enhance quality and efficiency of instruments. Finally, portable spectrum analyzer and mobile temperature monitor is built with PMDS to illuminate the usage of PMDS.
    5  Improvement of TSP and Application to Oriented Path Optimization for PCB NC Machining
    WANG Ying-zhang LI Jian XU Zong-jun
    2004, 27(12):17-19.
    [Abstract](550) [HTML](0) [PDF 257.11 K](192)
    Abstract:
    The fast developments of electrical information industry bring electrical manufacture technology the rigorous challenges and the drastic market competitions. This text aiming at the problem, which is instantly solved in the PCB hole sit machining, proposes an oriented path optimized technology for PCB hole sit machining. And the technology uses Greedy algorithm and Ant System Algorithm to solve the problems that more holes and empty runs make machining time longer. The actual applied effect is better and machining efficiency increases 23.9%. Obtain good economic performance.
    6  Simulation Analysis on Decreasing Vibration of Motorcycle Engine Suspension System
    TAN Feng-you HE Yu-lin DING Yi ZHANG Zhi-hong
    2004, 27(12):20-23.
    [Abstract](528) [HTML](0) [PDF 302.70 K](1438)
    Abstract:
    With the development of high-speed and high-power, the motorcycle vibration from engine become one of the major factors affecting the performances of motorcycle. Elastic suspension structure is adopted between the engine and frame for the vibration during the process of designing a certain type of motorcycle with 200 cc engine in some enterprise.Through optimization of the suspension system performance parameters, inherent frequency of suspension system keeping away from the activated frequency of engine in common use is essential. Isolation performance is improved and the vibration is solved. As a result, the comfort is improved.
    7  Multi-channel and High Precise Time Relay Verification Instrument
    LUO Jun SU Ji-wen CHENG Jie
    2004, 27(12):24.
    [Abstract](567) [HTML](0) [PDF 444.63 K](1031)
    Abstract:
    在实际应用中,由于磨损和老化时间继电器的精度和可靠性会逐渐降低,因此必须进行定期检定.为此研究开发的多通道、高精度时间继电器检定仪,其硬件部分以AT89C52单片机为核心控制器件、采用精度达5×10-6的温补晶振为基准源、双向可控硅控制时间继电器电源、高速光耦隔离时间继电器输入;其软件部分采用比较巧妙的设计来保证其精度,通过RS232接口可以在PC上输出测试报告、简化校准证书和校准证书等.实验分析和在工厂测试应用的结果证明该检定仪具有较小的测量不确定度、较高的工作效率.
    8  Analysis on the Illumination and Contrast of Imaging Deflection Measuring System
    LU Jin XIA Zhe ZHU Yong
    2004, 27(12):28-31.
    [Abstract](687) [HTML](0) [PDF 312.86 K](1086)
    Abstract:
    The principle of photoelectric imaging deflection measurement system are presented. The calculation of the image plane's illuminance and contrast are discussed. The relationship among the system's parameters are analyzed. The feasibility of high reflectivital material replacing the system's source are also discussed when illuminance on the ground is high. The result contributes to selecting the parameters of photoelectric imaging deflection measurement system and achieves the long online of deflection.
    9  GIS Partial Discharge Signal and Its Internal Sensor Detection
    TANG Ju~
    2004, 27(12):32-36.
    [Abstract](694) [HTML](0) [PDF 415.52 K](1225)
    Abstract:
    Partial discharge electromagnetic waves in GIS propagate is not only in the transverse electric and magnetic(TEM)mode, but also in transverse electric(TE) and transverse magnetic(TM)mode. The paper deduces out the mathematic expressions transient field excited by PD in GIS anywhere by using dyadic Green function theory. The contributions of TEM mode and all high order modes in the detecting frequency scope should be taken into consideration when calculating the electric field excited by PD in GIS. In simulative GIS laboratory, the designed inner couplers are superior to other outer sensors in detection of partial discharge. Inner couplers for the GIS model are developed and their frequency responses are analyzed in antenna model. At last the PD pulses excited by man-made defect are detected by inner couplers using high parameters oscilloscope.
    10  Modelling and Analysis of Multi-terminal Unified Power Flow Controller
    GUAN Chun~
    2004, 27(12):37-41.
    [Abstract](611) [HTML](0) [PDF 343.52 K](998)
    Abstract:
    To control the complex powers emanating from a bus in power system, there are two solutions. The obvious solution is to equip each of the n lines radiating from the node with its own UPFC. The next evolution of the idea is to equip with a multi-terminal UPFC. First, the configuration and the principle of the Two-terminal UPFC (when n=2) are presented. In consideration of the existing shortages of output model-constructing method and topological model-constructing method for T-UPFC, a switching function mathematical model of this device is constructed by introducing the concept of switching function. It has more generality than the output and the topological model with the consideration of the internal switching character and the physical course of the T-UPFC.
    11  Experimental Investigations for Thermal Storage and Rejection of Solid-solid Phase-Change Materials in the Packing Bed
    ZHU Xun FENG Yun-peng LI Zeng-min
    2004, 27(12):42-44.
    [Abstract](560) [HTML](0) [PDF 309.05 K](1439)
    Abstract:
    The authors conduct the experimental investigations for the heat-stored and heat-rejected behaviors of Pentaerythritol solid-solid phase-change particles in the packed bed. The experimental results show that at the beginning of heating, the temperature at the inlet of packed bed goes up quickly. But the rise of the temperature slows down along with the process of heat-stored. When the temperature of Pentaerythritol reaches to its phase-change temperature, the outlet temperature keeps almost constant. As the heat-rejected process begins, the temperature of the heat-stored materials decreases sharply at the inlet of packed bed, and drops very slowly at the posterior section of packed bed. The temperature of each spot in packed bed drops with increasing time, and besides, the temperature in the middle section is high and is low at the two sides of the test section. It spends nearly 4 hours to reject well all the thermal storage in the packed bed. In experiments, the sublimation phenomena can be obviously observed. After experiments, a portion of the heat-stored material has been lost.
    12  Realization of Multi-task Scheduling in Linux Based IPC Measurement and Control System
    LI Zhi-wen CHEN Zeng-hangineering Chongqing University Chongqing China)
    2004, 27(12):45-48.
    [Abstract](648) [HTML](0) [PDF 319.39 K](1108)
    Abstract:
    Industrial Personal Computer(IPC) system generally works in long duration,and so a stable software is essential for an IPC system.Linux has a good deal advantages,such as,stability in use,open source code and free of charge, therefore an IPC measurement and control system has developed based on Linux. Multi-task scheduling is the critical part in system software.A simple method to realize multi-task scheduling in IPC measurement and control system based on Linux alarm clock mechanism is presented. Linux alarm clock mechanism is implemented by the cooperation of software timers and system call that is used to install and handle alarm clock.First, Linux process timers,soft interrupt signals, relevant system call are introduced,as well as applications of Linux alarm clock mechanism in multi-task scheduling. And then an example of the application in the IPC measurement and control system is given. The system has passed longtime run test,accomplished expected functions and shown well stability, so that practicability of the scheduling method has been authenticated.
    13  Risk Identification and Risk Assessment in Engineering Variation of Construction Project
    FANG Jun
    2004, 27(12):49-51.
    [Abstract](824) [HTML](0) [PDF 236.61 K](1273)
    Abstract:
    This paper analyses the kinds of risk factors in engineering variation of construction project. Consists of tecthhon risk, economy risk, policy and low risk, contract candition risk and character risk. It puts forward the risk assessment index system and sets up the risk comprehensive assessment model by using the theory of fuzzy mathematics.
    14  Experimental Research on Seismic Shear Capacity of I-Shape Ductile Reinforced Concrete Structural Walls
    FU Jian-ping WU Yan-jiang PI Tian-xiang BAI Shao-liang
    2004, 27(12):52.
    [Abstract](673) [HTML](0) [PDF 504.23 K](1446)
    Abstract:
    The shear design formula for seismic shearwalls in the Chinese standard (Code for Design of Concrete Structures) have not been verified by tests yet, In order to compensate for it, the authors undertake the task of testing on the shear behavior of seismic shearwalls organized by the Code association. After discussing on the particular conditions controlling tests and philosophy in specimen designing, the results of the first group of tests on the seismic shear behavior of shearwalls, which are I-shaped and with relatively large scale and axial force ratio of 0.2 and tested under reversed cyclic horizontal forces, are introduced. The results are analyzed and discussed.
    15  Method to Determine the Intersection of Two Arbitrary Solid Polygon With Node Operation
    ZHU Ai-jun~ DENG An-fu~ WEI Yan-jun~ TANG Shu-ming~
    2004, 27(12):56-59.
    [Abstract](807) [HTML](0) [PDF 344.29 K](1426)
    Abstract:
    The method to polygon' intersection is applied in computational geometry, computer graphics, GIS, evaluation of geo-hazards and civil engineering. Based on the node state of polygon, the authors propose the method and algorithm of polygon' intersection, the key to which is node operation. This method's concept is simple; and it is easy to computer program's implementation. It avoids to singular problem of Boolean Operation, and is easy to solve the problem of overlapping side and sides intersecting in node of polygon. For the arbitrary way of intersecting of arbitrary solid polygon, this method is accurate and general.
    16  Experimental Study on the Deformation Characteristics of Fine-Sandstone Under the Loading and Unloading Conditions
    XU Jiang WANG Wei-zhong YANG Xiu-gui WANG Hongl Disaster Control Engineering Under the State Ministry of Education Chongqing University Chongqing China)
    2004, 27(12):60-62.
    [Abstract](743) [HTML](0) [PDF 293.12 K](234)
    Abstract:
    The deformation characteristics of the fine-sandstone is studied under the loading and unloading conditions at the three different deformation-rates and the two different stress-levels. The experimental results show that there is really the plastic-loop in the deformation curve for the loading deformation curve is different from the unloading deformation curve. But the plastic-loop is nearly unchangeable since the second circulate loading. The residual-deformation is be almost zero since the second circulate loading, and that the slope of the deformation curve increases as the deformation-rate increases, and that the residual-deformation increases as the stress-levels increases.
    17  Deductive Models of Concentration Field for Locating the Death in Mine and Its Application
    ZHOU Xin-quan XU Min ZHANG An-qi
    2004, 27(12):63-67.
    [Abstract](502) [HTML](0) [PDF 421.04 K](223)
    Abstract:
    Based on the idea of locating the death in the collapsed area of mine by the gas released from the organism decomposition proposed by the authors, this paper presents the Least Multiply Square (LMS) model for the location and develops two kinds of ANN models for the locating computation. The results of the organism decomposition experiment indicates that the Back Propagation (BP) is better for locating the death in mine. Above works are set up the foundation of the theoretical analysis and the technical development for locating the death by analyzing the concentration distribution of the marker gas, mercaptans, in mine. Based on the technology developed, the period, for the rescue team members staying in that risk area, can be shorten. The rescue work achieve a step forward for more reasonable, feasible and efficient.
    18  Analysis of Safe Evacutation Based on Engineering Theory of the Safty of Fire Disaster
    WANG Ling-dong
    2004, 27(12):68-72.
    [Abstract](730) [HTML](0) [PDF 397.54 K](229)
    Abstract:
    When the building is on fire,there is a certain requirement to evacutate people safely.In fact the requirement is normally executed by certain standard. Nowadays, both internal and external experts have proposed many ways to change current dealing models to functional standard models.But there need to be further research for functional design of distance on safe evacutation.Based on the dissection of current existed inadequacy,this thesis covers a higher standard of safe distance.That is,if the fire brokes out inside of the building,people should estimate the safe distance according to smoke and heat of the fire,the influnence of the circumstances to time and speed on evacutation.The paper connects engineering theroy of safty of fire disaster and then it designs a model to evacutate people safely.The model will play a part in promoting designing a more functional antifire structure.
    19  Enterprise Information Engineering Model and Its Integrated Support Environment
    TAN Wen-an
    2004, 27(12):73-77.
    [Abstract](520) [HTML](0) [PDF 494.06 K](206)
    Abstract:
    By analyzing the process of enterprise information engineering construction and intra relationship among information system requirement, business process modeling, application system constructing and project management, one of 4 meta model composed of requirement engineering, process engineering, application system engineering and support engineering is proposed for enterprise information engineering. The developments and applications of the business processes and its application systems are integrated into the same development space and application space. Basing on this, a prototype system composed of requirement modeling environment, business process modeling environment, application system modeling environment, and support engineering environment has been designed and built, which is used for supporting enterprise information engineering constructing. It is valued for the enterprise information engineering construction in our country.
    20  Image Watermarking Technique Based on the DCT Transform and the Edge Detection
    SU Wei-feng~ YANG Xiao-fan~ BAI Sen~ ZHAO Li-jun~ LUO Gao-wen~
    2004, 27(12):78-81.
    [Abstract](675) [HTML](0) [PDF 374.08 K](256)
    Abstract:
    As a main application of information hiding technique to multimedia copyright protection, the digital watermarking technique, which embeds an invisible signal (watermark) to the original multimedia data (image, audio, and video), has been proposed as a viable solution for the copyright protection and authentication of multimedia data in a networked environment since it makes it possible to identify the author, owner, distributor or authorized consumer of multimedia data. So it has drawn extensive attention in recent years and has been widely applied. A new image watermarking scheme is proposed by incorporating the DCT transform and an edge detection technique. Experimental results show that this method is more robust against the common signal processing attacks than the traditional Cox's method.
    21  Structural Model and Cargo-handling Technology of the Quay with High Amplitude of Water Level in Lantsang
    ZHOU Shi-liang~
    2004, 27(12):82.
    [Abstract](652) [HTML](0) [PDF 473.66 K](190)
    Abstract:
    The background of a west communication science & technology project whose topic is structural model and cargo-handling technology of the quay with high amplitude of water level in Lantsang is introduced, and its main research content, research of key technology and main findings are introduced too. Three types of structural model and cargo-handling technology which can be applied perfectly in Lantsang are put forward. The structural models include beam and slab structure with pillar supported, box bridge crane structure and reinforced earth structure, the cargo-handling technologies include vertical fixed crane technology, bridge crane technology and movable simple crane technology. Some findings have been applied in the supporting engineering-Menglun harbor.
    22  Direction of Arrival Estimation for CDMA Communication Signal
    YUE Jin FENG Wen-jiang HOU Jian-hui
    2004, 27(12):86-90.
    [Abstract](689) [HTML](0) [PDF 398.66 K](184)
    Abstract:
    MUSIC algorithm is often applied in direction of arrival estimation of communication signal or radar signal. But the traditional MUSIC algorithm is not applicable in the presence of the correlational signals. Combining with time average processing, an algotithm of two-dimensional space-time average is suggested on the base of space average technic especially for the DOA estimation of CDMA communication signal. A detaild analysis and a conclusion about this improved algorithm is presented. Ensuring the accurary of the estimation an efficient decrease in quantity of operation is achieved with the algorithm, so it is more suitable for real-time processing. The efficiency of the improved algorithm is attested by the emulating results.
    23  Investigation on Alloy Phases in As-aged ZK60 Magnesium Alloy
    MA Yan-long ZUO Ru-lin TANG Ai-tao ZHANG Jing PAN Fu-sheng
    2004, 27(12):91-94.
    [Abstract](760) [HTML](0) [PDF 507.35 K](236)
    Abstract:
    对经时效热处理(T6)的ZK60镁合金进行了较为全面的研究,初步确定了时效ZK60镁合金中主要合金相的种类和形态.研究发现,固溶处理ZK60镁合金中有明显的花朵状偏析;从金相照片和透射电子显微照片中均发现了残存少量的未溶物相,选区电子衍射花样(SADP)标定为MgZn2相.在固溶处理和时效处理的ZK60镁合金均存在一类MgZn2相,它们无取向分布,形貌呈近似平行四边形,大小在200~500nm之间,对热处理条件不敏感.时效处理的ZK60镁合金中的另一类析出物是MgZn相,形态为长约500nm的杆状.时效处理的ZK60镁合金中除了已标定的MgZn相和MgZn2相外,还发现了4种形态和分布不同的物相,它们可能是完全不同的物相,也有可能是同种物相在不同截面所呈现的不同形态.
    24  Advances in Fermentation of L( ) - lactic Acid by Rhizopus Oryzae
    WANG Rong WANG Yuan-liang CHEN Guo-ping LUO Yan-fengstry of Educction College of Bioengineering Chongqing University Chongqing China)
    2004, 27(12):95-97110.
    [Abstract](996) [HTML](0) [PDF 356.78 K](297)
    Abstract:
    L(+)-lactic acid and its salts have been widely used in food and pharmaceutical. Advances of production (L(+)-)lactic acid by Rhizopus oryzae fermentation from starch in recent years are reviewed. Rhizopus oryzae is a preferable species for its outstanding ability to produce almost optically pure L(+)-lactic acid with low nutritional requirement.Studies on L(+)-lactic acid focused on the selection over-production strains,optimization of fermentation culture medium and fermentation technology,extraction and separation course,the design of new bioreactor and so forth.Controlling the growth forms of Rhizopus oryzae mycelial can improve the ability of production L(+)-lactic acid and make the operation easier.And breeding L(+)-lactic acid over-production strain by gene engineering technology,improving the fermentation equipment and optimizing the appropriate immobilized carrier,will greatly reduce the cost of L(+)-lactic acid production.Increasing in the research and development of lactate and polylactic acid will extend the use of L(+)-lacic acid.
    25  Influence of Nb Concentration on ρ and Magnetoresistance of Nanometer NiFe Films
    LIU Jun~
    2004, 27(12):98-101.
    [Abstract](632) [HTML](0) [PDF 378.17 K](177)
    Abstract:
    以NiFeNb为新种子层,采用直流磁控溅射法制备了(Ni82 Fe18)(1-x)Nbx(35A)/Ni82Fe18(150A)/Ta(30A)纳米级坡莫合金系列膜.测量了样品的零场电阻率(ρ),磁电阻(△R/R)和微结构.研究了ρ、△R/R随Nb含量的变化.探讨了Nb含量对坡莫合金薄膜微结构从而对其ρ和△R/R影响的微观机制.
    26  Object-oriented Design of the Intelligent Decision-making System of Rocket Safety Controlling
    LI Ya~
    2004, 27(12):102-106.
    [Abstract](532) [HTML](0) [PDF 447.37 K](926)
    Abstract:
    Because of systemic error in measurement and trajectory track, precision of trajectory parameter is not high and it results in false alarms in the traditional systems. The intelligent decision-making system of rocket safe controlling is built by using object-oriented method. First, the authors analyze and design rocket safety controlling architecture. Then, we study about knowledge expressing and knowledge database by object-oriented technique for the rocket safety controlling. At last, inference procession of the system is discussed. Intelligent decision-making system of rocket safety controlling is accurate, extensible and flexible.
    27  Design and Realization of One Vehicle Management System Based on Web-GIS
    LONG Hua~
    2004, 27(12):107-110.
    [Abstract](553) [HTML](0) [PDF 339.91 K](1153)
    Abstract:
    This paper presents one of Vehicle Management System base on Web-GIS technology, which has the capability of using all kinds of GPS equipment being made by different company, and aslo can support the customized Vehicle Management System that is constructed for the demand of all kinds of consumer(individual and group).To generate the Web-GIS map, it uses the map generating engine of MapXtreme. To be compatible with different equipments, it uses uniform normalized protocol of communications and the network of GSM. It uses the technology of EJB and B/S for the expansibility. All of these technology build up the expansibility of system and the operating system with Web and reduce the cost of maintenance. The utility of system is aslo enhanced.
    28  Wavelet Application in Algorithms of Data Mining
    WEN Jun-hao~
    2004, 27(12):111-115.
    [Abstract](578) [HTML](0) [PDF 486.49 K](1657)
    Abstract:
    Wavelets have been widely applied in such research areas as image processing, computer vision, network management and data mining. Wavelets have many favorable properties, which are hierarchical and multiresolution decomposition structure, linear time and space complexity of the transformations. The paper presents wavelet application on the algorithms of data mining, in cluding as clustering, classification, distributed data mining, similarity search, approximate query processing, visualization and so on. Finally, the paper concludes by discussing the impact of wavelets on data mining research and outlining potential future research directions and applications.
    29  Frame of Parallel Data Extraction Interface for Commercial OLAP
    FENG Yong WU Kai-gui XIONG Zhong-yang WU Zhong-fu
    2004, 27(12):116-119123.
    [Abstract](530) [HTML](0) [PDF 403.85 K](1043)
    Abstract:
    The OLTP system can not afford the demand of decision support due to the drastic commerce competition, so the appearance of OLAP technology is importanct. The key technical of OLAP, the classical resolvent of data warehouse and the methods of data preprocessing are studied. A frame of parallel data extraction interface for commercial OLAP is proposed. Data preprocessing technology (data cleaning, data integration and transform, data reduction) connected with the frame is practically studied and applied. The eficiency and the practicality of the frame are illustrated by practical application.
    30  Convergence of Ishikawa Type Iterative Sequence With Errors for Asymptotically Quasi-nonexpansive Mappings in Convex Metric Spases
    TIAN You-xian
    2004, 27(12):120-123.
    [Abstract](659) [HTML](0) [PDF 271.11 K](913)
    Abstract:
    Liu Qihou, in 2001 and in 2002, extended the results of Petryshgh and Williamson, Ghosh and Debnath respectively in 1973 and in 1977, proved some sufficient and necessary condition for Ishikawa iterative sequence and for Ishikawa iterative sequence with error member of asymptotically quasi-nonenpansive mappings to converge to fixed poind in Banach space and in uniform convex Banach space. In convex metric spaces,the Ishikawa iteration process with errors is defined for asymptotically quasi-nonexpansive mappings.Some sufficient and nevessary conditions proved for the iterative schene converges to the fixed point of the asymptotically quasi-nonexpansire mappings.These results qeneralize and unify many important known results in recent literature.
    31  Existence of a State Feedback of not Changing the Observability of the System
    QIU Xue-shao ZHANG Ying-he GUO Xiao-li WANG Xia
    2004, 27(12):124-126130.
    [Abstract](767) [HTML](0) [PDF 220.84 K](1135)
    Abstract:
    By modern cybernetics, we can find out a state feedback for a linear time system, which does not change the controllability and stability of the system. But whether a state feedback for linear time system can be found out, which does ont change observability of the system or not, so far hasn't been discussed. The problem is studied according to the steady discrete time linear system, and a state feedback is found out, which does ont change the controllability, observability and stability, by relation of stability, observability and characteristic root, rank of matrix, of steady discrete time linear system; the method of how to construct the state feedback is given.
    32  Application and Progress in Cancer Analysis by FTIR Spectroscopy
    HE Jian-chuan WANG Jian-hua WEN Zong-he WEI Ya-liMinistry of Education College of Bioengineering Chongqing University Chongqing China)
    2004, 27(12):127-130.
    [Abstract](451) [HTML](0) [PDF 335.24 K](1596)
    Abstract:
    The research progress and the application of FTIR spectroscopy on diagnosing cancer are reviewed. The cancer is one of the tallest diseases of the rate of human beings. At present, its diagnosis primarily depends on the pathology one. The process of pathology diagnosis is bother and often suffers the influence of the artificial factors. Along with the rapid development of FTIR spectroscopy and its correlative technique, the FTIR spectroscopy has been applied not only to studying the structure of big biologic molecules like protein or nucleic acid, but also to studying more and more complicated system like cells and tissues. The research expresses that FTIR spectroscopy can open out the characteristics of tissues of cancer from the molecular level, and it is very possible that FTIR will be a quantitative instrument of diagnosing cancer.
    33  Effect of Different Ginkgo Extraction on NO,MDA,SOD Secreted by Damaged ECV- 304
    TANG Chun-hong~
    2004, 27(12):131-133.
    [Abstract](612) [HTML](0) [PDF 258.85 K](1249)
    Abstract:
    The authors compared some different ginkgo extraction on their physical characteristic and pharmic function and determined their flavones content by HPLC. In pharmacological study, the HUVEC was used as action target, damaged by hydration diamine, at the same time the different desity GBE was added to protect the cell, after cultivated (24 h), the NO value, MDA and SOD in supernate were determined. The results show that all these GBEs can recover the NO value decreased due to the cell damaged by hydration diamine while it had nearly no effect on MDA. The results indicat that the change of the availability ingredient of GBE have strong effect on their pharmic function.
    34  Empirical Analysis of Corporate Intellectual Capital and Corporate Performance
    LI Jia-ming LI Fu-bing
    2004, 27(12):134-138.
    [Abstract](692) [HTML](0) [PDF 493.41 K](1818)
    Abstract:
    The principal purpose of this study is to investigate the association between the efficiency of value-added by a major components of a firm's resource (human capital,physical capital and structural capital) and corporate performance (profitability).Data consists of 30 firms are drown from computer area.Empirical analysis is conducted with correlation and linear multiple regression analysis.Findings from empirical analysis indicate that association between physical capital and profitability is statistically significant,there is a positive relation between human capital and firm performance,but not statistically significant.Accordingly, we analyse the factors that probably affect the findings.
    35  Analysis of Single Sampling Plan by Attributes From the Game Behavior of Manufacturer and Consumer
    REN Yu-long REN Hong-bin LI Jun TAO Hao-yang
    2004, 27(12):139-141145.
    [Abstract](423) [HTML](0) [PDF 336.38 K](1150)
    Abstract:
    By using the game theory to analyse the game behavior of both sides, the authors finds out the influence of sampling plan by virtue of the game behavior of both sides. They also make use of the principle and deduction of single sampling plan by attributes, which shows the quantitative description of it. The authors then explain in actual life the difference of the game ability of both sides lead to the difference of conforming quality level and nonconforming quality level, manufactuer and consumer's risk rate in implement contract.This offers the thought of analysis.
    36  Empirical Study on Corporate Governance and Voluntary Disclosure in China
    LI Yu-xiang FU Xiu-ming PENG Chong LI Li-ming
    2004, 27(12):142-145.
    [Abstract](575) [HTML](0) [PDF 361.46 K](186)
    Abstract:
    This paper examines the impact of ownership structure and board composition on voluntary disclosure. Ownership structure is characterized by first ownership, and board composition is proxied by the percentage of independent directors. Voluntary disclosure is measured by an aggregated disclosure score of non-financial and financial information. Our results show that both lower and higher first ownership are associated with increased disclosure. The number,not percentage,of independent directors improve corporate disclosure. We also find that larger firms had greater disclosure.
    37  Selection Theory and Method of Stock Investment Strategy
    HE Chao-lin
    2004, 27(12):146-148.
    [Abstract](642) [HTML](0) [PDF 270.45 K](303)
    Abstract:
    The author analyzes and concludes the factors that affect the stock market, and gives out the theory basis of the model and its feasibility; Then, based on the related knowledge of statistics and unit exchange, the selection theory and its corresponding model of stock investment strategy are gotten to describe the risk situation of stock market. At last, the author concludes the selection method of stock investment strategy and does the empirical study to prove that the strategy is both right and efficient.
    38  Revelation Game of the Private Information Under Asymmetric Information
    ZHENG Hai-lei PU Yong-jian
    2004, 27(12):149-151.
    [Abstract](551) [HTML](0) [PDF 301.88 K](172)
    Abstract:
    Because of the existence of the private information, the informed trader can make excess payoffs by using the information advantages. And also the informed trader can choose the trade strategies to attain the up most excess payoffs. However, he may lose his information advantages. This paper analyzes the conditions when the informed trader can make use of the private information and its optimal times underlying the framework of the strategic market game.
    39  Research of the Estimate of Our Country''''s University Science Park Based on the Analytic Hierarchy Process Method and the Dynamic Clustering Method
    XU Xiao-qing TAO Xing-jie WANG Yong-ning
    2004, 27(12):152-155.
    [Abstract](837) [HTML](0) [PDF 387.36 K](168)
    Abstract:
    The development of university science park is very rapid, its evaluation is a problem that to be solved. According to the feathers of university science park, the authors select the analytic hierarchy process as the basic evaluating method to develop elements of university science park, and then use the dynamic clustering to do the synthetical evaluation to the general developing status. The examples show this evaluating system is simple and practical. The system can provide decision-making functions to the development of university science park.
    40  Exsitence of Trajectories Connecting Plane Critical Points
    ZHOU Yun-hua
    2004, 27(12):156-159.
    [Abstract](649) [HTML](0) [PDF 276.57 K](287)
    Abstract:
    对C1平面流f,如果存在点p0∈R2及奇点p1,p2,使得lim t→ ∞f(P0,t)=p1,lim t→-∞f(P0,t)=p2,称f(P0,R)是连结奇点p1,p2的轨线.利用连结弧的半有界性,得到了一些判别仅含2个奇点的平面动力系统连结轨线存在的准则.

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