Volume 27,Issue 8,2004 Table of Contents

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  • 1  Simulation of the penetration rate (ROP) of the air percussion drilling
    LIN Yuan-hua LI Run-fang SHI Tai-he LIANG Zheng LIN Teng-jiao Goods SWPI ngqing China)
    2004, 27(8):1-6.
    [Abstract](745) [HTML](0) [PDF 465.35 K](158)
    Abstract:
    It is difficult to calculate the penetration rate (ROP) of percussion drilling. In the early research, the empirical or semiempirical formulae of the ROP are derived from the laboratory or field data collected by the researchers. However, the ROP value of the formulae is not as accurate as that in the field. Benefiting from the dynamic model, the geometric structure model and the theory of the roller cone bit, the mathematical model of the hammer bit, the mathematical model of the true bottom hole and the mathematical model between the tooth and the rock of the hammer bit are established. Hence the ROP of the air percussion drilling can be predicted by simulation. Field tests show the models are reliable and the results are coincident with that in the field. The research can help to redesign the hammer bit and optimize the drilling parameters.
    2  Independent component analysis and its application in estimating VEP
    WAN Xiang-kui JI Zhong LIANG Xiao-rong QIN Shu-ren
    2004, 27(8):7-10.
    [Abstract](573) [HTML](0) [PDF 320.38 K](210)
    Abstract:
    Original signals can be effectively estimated from their linear mixed signals by independent component analysis (ICA), even though their frequency components are overlapped, which provides a way to estimate the faint electrophysiological signals. And many researchers who study biomedical signal processing have paid great attention to the technique. We discuss the ICA model and the implement of a fixed-point fast ICA algorithm based on negentropy criterion. With the algorithm, we availably pick up the simulated visual evoked potential (VEP) from the mixing signals.
    3  Finite element analysis of the LX150 motorcycle crankcase box
    WU Guo-yang LONG Si-yuan YANG Zhi-gang CHEN Xiao-an WANG Yong-gang WU Li-hong ty Chongqing China .College of Mechanical Engineering Chongqing University Chongqing China )
    2004, 27(8):11-14.
    [Abstract](434) [HTML](0) [PDF 391.88 K](257)
    Abstract:
    The wall thickness and strengthen muscle of motorcycle crankcase box influences its structure intensity directly. The static model of crankcase box of a magnesium alloy material is established by finite element method. The structure is analyzed with I-DEAS, the reason the crankcase box is crazed is pointed out. The structure is rebuilt, the intensity is increased remarkablely, the cost of manufacture is reduced largely. And the capability of a originally material, i.e. aluminium alloy is validated.
    4  Dynamic data exchange based on STEP-OODB for network-supported collaborative design
    ZHANG Bin CHEN Xiao-an LUO Tian-hong LIN Li-hong XIAN Zhi-hong ongqing China)
    2004, 27(8):15-19.
    [Abstract](561) [HTML](0) [PDF 459.55 K](1012)
    Abstract:
    This paper analyzes the features of data for network-supported collaborative design, researches the data transformation, the data transmission and the data transaction of collaborative design. The system configuration and organization mode of dynamic data exchange for network-supported collaborative design are developed, in which, STEP serves as the product data exchange standard, what's more, Object-Oriented Database (OODB) is the kernel database of the system, so that each of the CAD systems can synchronously access the OODB, share and exchange the design information. The STEP-OODB serves as the organizing mode of dynamic data exchange for the network-supported collaborative design based on Internet, which realizes the real-time exchange and consistency of the dynamic data among the cross-platforms and CAD systems.
    5  Numerical simulation of remodeling in mandible under orthopedic loads
    YAN Bo LIU Hai-jing ZHANG Pei-yuan
    2004, 27(8):20-23.
    [Abstract](658) [HTML](0) [PDF 300.35 K](1021)
    Abstract:
    The research on the remodeling in mandible under the action of orthopedic loads is important for the determination of orthopedic scheme. a three-dimensional finite element model of mandible and temporomandibular joint is established. Using Cowin Remodeling Law, the finite element simulation of the remodeling in mandible during the orthopedics under the action of orthopedic loads is carried out. Comparing the numerical results after remodeling with those before remodeling, it is demonstrated that the normal remodeling greatly affects the distribution of strain and strain gradient on the surface, therefore the effect cannot be ignored in the determination of the orthopedic scheme.
    6  Universal design of ISO9000 quality management information system
    DAI Hong-mei HUANG Zhong-quan ZHANG Gen-bao WANG Shu-de FENG Shi-lin
    2004, 27(8):24.
    [Abstract](814) [HTML](0) [PDF 337.50 K](1256)
    Abstract:
    Quality Management Information System(QMIS) is critical component in enterprise quality system. The enterprise quality management of modern manufacture perform mostly as a dynamic system during continuous change. OMT(Object-oriented Modeling Technique) is adopted in this paper, QMIS is analyzed on the aspects of system analysis, system architecture, object model. The framework architecture of flexible ISO9000-QMIS and the universal feature is presented. With the design of flexibility and expandability, structure and function can be redesigned based on managing instance of enterprises, and satisfy the dynamic requirement of informationlization.
    7  Optimize graphics reasoning technlogy and its application on sheep diseases curing expert system
    PENG Yan~
    2004, 27(8):27-30.
    [Abstract](544) [HTML](0) [PDF 397.98 K](959)
    Abstract:
    Expert system is a program system that prossesses special knowledge and esperience, is reasoning solving process which simulates experts according to special konwledge and espericence with artificial intelligence. This paper discusses the decision-making technology and method of expert system based diagram reasoning, the optimized diagram reasoning is also pointed out. The development technology and method of sheep diseases curing system is expatiated.
    8  Forming process of asymmetric wall forging
    WANG Meng-han ZHOU Jie AI Bai-sheng
    2004, 27(8):31-34.
    [Abstract](633) [HTML](0) [PDF 436.47 K](1216)
    Abstract:
    Asymmetric wall products are widely used in the engineering. However, there are many limitations in the traditional forming processes employed to produce them. Oil pump stator has been studied as an instance to present the forming process of asymmetric wall products. First, a theoretical analysis of the forging's forming process has been made. Second, a rigid-visco-plastic finite element model of oil pump stator has been constructed and three dimensions FEM simulation and analyzing of extruding process have been taken by employing the simulation software. At last, parameters of the forming process have been optimized, the rule of forging's metal flow in the forming process has been analyzed and some distributions of stress and strain have been offered. These data can be use to direct the production of the other asymmetric wall forgings.
    9  Application of neural networks to the detection of pulse signals
    XU Fang-wei~ CAI Kun-bao~
    2004, 27(8):35-39.
    [Abstract](738) [HTML](0) [PDF 407.03 K](2349)
    Abstract:
    人工神经网络是在结构上模仿生物神经连接的连接型网络,经训练的网络可用来进行模式分类,信号处理与检测等.针对海洛因吸食者的脉象信号与正常人脉象信号的特征差异,成功地应用BP网络对15例海洛因吸食者和15例正常人的脉象信号进行了识别.为此,建立了一个40~20~1的二层BP网络模型,选取每一例脉象信号的一段特征信号作为网络的输入信号,采用了训练样本和加噪声的训练样本分别训练网络的方法.论文还比较了共轭梯度法与基本BP算法训练网络的快慢问题.实验结果除1例正常人被误判外,吸毒病人全被检测出来,网络达到了96.7%的识别率,其结果说明训练的网络对检测脉象信号是十分有效的.
    10  Application of liquid crystal display in the field of dynamic wave display
    LUO Le~
    2004, 27(8):40.
    [Abstract](621) [HTML](0) [PDF 343.37 K](1358)
    Abstract:
    It is a very important task that using a liquid crystal display module to replace the computer monitor and realizing the dynamic display of wave and data without dithering. The paper describes the way to process sampling data using synchronous technology, to transform data and to find unknowable coordinate. The transforming of address and the drawing of wave and the scrolling of wave are introduced. The dots link up with each other and the wave has no dithering. The dynamic wave and static parameter can coexist. The engineering application shows that the method is effective and economical.
    11  Examining brain oedema through brain electrical impedance topographic mapping
    LUO Ci-yong ZHANG Zhan-long HE Wei
    2004, 27(8):43-46.
    [Abstract](502) [HTML](0) [PDF 388.22 K](1320)
    Abstract:
    Change of Brain Electrical Impedance has great relations with brain oedema and brain block, a new method of Examining Brain Oedema through Brain Electrical Impedance Topographic Mapping(BEITM)is reviewed. Network topology structure that used in BEITM are also presented. According to topology, we discuss the drawing algorithm that based on triangle element. Some patients have been measured to make clinical data, according to this data Brain Electrical Impedance topographic come into being by computer at last, functional imaging has been implemented. Clinical case analysis compared with change state of an illness and repeatability of steady patient's data has proved the method is feasible.
    12  Reserarch advance on mechanism of arsenic trioxide on tumor
    GUO Li-xia WANG Yuan-liang XIN Juan nistry of Education College of Bioengineering Chongqing University Chongqing China)
    2004, 27(8):47-51.
    [Abstract](564) [HTML](0) [PDF 471.26 K](1100)
    Abstract:
    The article demonstrates the relative concepts of apoptosis and summarizes the effect of arsenic trioxide to the carcinoma, its possible principle included. Recent development of the reports about arsenic trioxide-induced apoptosis is referred and reviewed. Apoptosis is a natural mechanism and a common physiological death of cell, and its abnormity has great effect on cancer. Arsenic trioxide can induce apoptosis in APL cell and other cancer cells, and has been used in treating the patient with other kinds of malignant cancers. The mechanisms of arsenic trioxide-induced apoptosis are gradually becoming a hotspot, but still not lucid. With intensive study of arsenic trioxide, it can be a useful ways in treating cancer patients in the future.
    13  Analysis of microstructure of as-cast ZK60 magnesium alloy
    MA Yan-long ZUO Ru-lin TANG Ai-tao ZHANG Jing PAN Fu-sheng
    2004, 27(8):52-56.
    [Abstract](823) [HTML](0) [PDF 493.04 K](1577)
    Abstract:
    作为高强度变形镁合金研究的基础工作,较系统研究了ZK60镁合金的铸态组织.光学显微分析表明,铸态组织中存在很明显的枝晶;有相当数量的共晶组织沿晶界或枝晶边界断续分布.差热分析(DSC)表明,在加热和冷却速度分别为15 K/min和10 K/min时共晶组织的熔化温度为345℃,凝固析出温度为328.7℃.x-衍射分析初步确定,在铸态ZK60镁合金中主要有α-Mg,MgZn,MgZn23种合金相.透射电子显微分析发现,共晶组织类型、组成和分布具有多样性,选区电子衍射花样标定共晶组织主要由α-Mg和MgZn两相构成.
    14  Comparison of three methods of removing protein from polysaccharide extract in the plant
    LI Zhi-min WANG Bo-chu ZHOU Jing PENG Liang nistry of Education College of Bioengineering Chongqing University Chongqing China)
    2004, 27(8):57-59.
    [Abstract](1871) [HTML](0) [PDF 294.76 K](554)
    Abstract:
    多糖对肿瘤、病毒、心血管等方面具有独特的生物活性,且细胞毒性很低,因此多糖的分离及纯化一直是一个很有意义的研究课题.实验以多糖损失率和脱蛋白率(r)为衡量指标,通过对几种脱蛋白方法的比较,优化出植物多糖提取液的脱蛋白方法,为多糖的纯化提供了一定的参考.选用了3种较为常见的方法:三氯乙酸法、盐酸法及沙维积法(Sevag 法)对植物多糖提取液进行脱蛋白处理.三氯乙酸法、盐酸法及Sevag法的脱蛋白率分别为46.1%、72.5%和42.3%,多糖损失率分别为6.1%、15.1%和14.3%.盐酸法脱蛋白率高,但它的多糖损失率较高;三氯乙酸法较温和,但除蛋白效率不高;Sevag法的脱蛋白效果不及前两种方法.
    15  Cloning of aspergillus niger F246 phytase gene and its a new type of expression vector construction
    HUO Dan-qun~
    2004, 27(8):60.
    [Abstract](837) [HTML](0) [PDF 479.08 K](252)
    Abstract:
    This research amplified the phytase gene of Aspergillus niger F246 by the polymerase chain reaction(PCR), which is selected and identified by ourselves.Then the product of PCR was inserted respectively into the lactobacillus expression vector pMG36e to construct the new type of expression vector pMG36e-phyA. The genomine DNA of the Aspergillus niger F246 strain is used as the template for PCR,and the PCR product was subcloned into pMD18T. After sequncing the coding region and analying the sequnce of amino acids, the product of PCR was cutted from pMD18T and subcloned into pMG36e for the engineering strain of Lactobacillus MG1363-pMG36e-phyA. The construction of new recombinant expression vector pMG36e-phyA for the phyA gene lays the base of the study on obtaining large and high active phytase and developing the new microbial ecologicalagent.
    16  Fault check & safeguard system of optical cable for communication based on GIS
    CHAI Yi TANG Ya LI Nan DAI Wen-zhou
    2004, 27(8):65-68.
    [Abstract](588) [HTML](0) [PDF 391.42 K](197)
    Abstract:
    Once fault occurs on the optical cable, it will seriously impair communication. In order to solve the terrible result caused by faults, the system implements the management of the spatial database of the optical cable and the information along it and location fault spots with celerity and legitimacy, according to the spatial and environmental characteristics on geographic distribution of the optical cable network and based on GIS, as it displays the multimedia information around the fault spot, such as landform and physiognomy. Combining the buffer with path analysis function of GIS, the system searches for the optimum path to the fault spot on the optical cable, and also gives emergency schemes to dispose the fault. This application has gained a satisfactory result for effectively managing communication optical cable resources, shortening the repair time, and diminishing the loss caused by faults.
    17  Principles and algorithm of semantic analysis based on term connections
    LI Liang-yan HE Zhong-shi YI Yong
    2004, 27(8):69-74.
    [Abstract](799) [HTML](0) [PDF 464.32 K](162)
    Abstract:
    The present natural language processing (NLP) methods mainly employ bottom-up language analysis ways, which have only limited semantic analysis capabilities. Therefore it is impossible to carry out semantic processing for large amounts of real texts. This paper presents a semantic analysis approach and corresponding algorithms based on term connections. The approach has rooted in semantics based on term connections and taken a major sentence cut-in, bottom-up semantic analyzing process. The main algorithm is to find the optimal sentence tree based on the semantic meaning conformity of term connections. So far, this approach has been applied in project CAPC (Computer Aided Poetry Composing) funded by the Chinese Natural Science Foundation.
    18  Diagnosis approach based on failure mode importance of causality diagram
    LIANG Xin-yuan~
    2004, 27(8):75-78.
    [Abstract](618) [HTML](0) [PDF 361.63 K](150)
    Abstract:
    Causality diagram methodology is a probabilistic reasoning, which can be applied to fault analysis. However, it lacks analysis on the importance of failure mode. The importance of failure mode is introduced to develop causality diagram methodology, which is successfully applied in fault analysis of gas explosion in colliery. The study shows that causality diagram based on importance of failure mode is an effective qualitative and quantitative method to analyse faulty, evaluate system safety and provide feasible countermeasures to prevent accidents.
    19  Error measure of filter used in optical wavelet transform for image data compression
    CHEN Xiu-jian~
    2004, 27(8):79-82.
    [Abstract](572) [HTML](0) [PDF 342.79 K](183)
    Abstract:
    This paper analyzs the error measure of filter used in optical wavelet transform for image data compression, designs a measure system for filter's error and implements it by using matlab platform, meanwhile, it indicat and overcom the shortage of Photoshop in image statistical characteristic analysis. The batch operation and the precision of histogram information. Experiment results have proven its correctness.
    20  Short-time fourier transform analysis of the phonocardiogram signal
    ZHU Bing-lian YANG Lei
    2004, 27(8):83-85104.
    [Abstract](1090) [HTML](0) [PDF 405.61 K](255)
    Abstract:
    Heart sound is a highly nonstationary signal, and the Short-time Fourier Transform ation(STFT) is an effective method for this kind of signal to be analysed. Because of the nonstationarity of the phonocardiogram, it is important to maintain an analysing time window as short as possible to guaranty the stationarity hypothesis over small analysed segments. This will reduce the frequency resolution of the resulting spectrogram. However by adjusting the sliding time window, we can reach an acceptable result. The spectrogram is caculated by using first, short length sliding window to generate a temporal representation of the PCG, then longer length sliding window in order to generate a spectral representation of the PCG power. The resolution in such representations depend directly on the sliding window length. The temporal representation allows heart sounds and cardiac cycle durations to be measured. Whereas the spectrum, assuming a good frequency resolution, allows spectral characterization of each heart sound. The results we obtained on normal PCG signal show that the STFT analysis with different scale basis provides a clear comprehension of the cardiac events in both time and frequency domain.
    21  Fractional brownian motion and binary market models
    CHEN Yao-hui~
    2004, 27(8):86-91.
    [Abstract](524) [HTML](0) [PDF 404.35 K](269)
    Abstract:
    We prove a Donsker type approximation theorem for the fractional Brownian motion in the case of the Hurst index greater than one half. With this approximation we construct an elementary market model that converges weakly to the fractional analogue of the Black Scholes model. We show that there exist arbitrage opportunities in this model.
    22  Parallel algorithm for association rules in cluster
    WANG Hua-qiu~
    2004, 27(8):92-95.
    [Abstract](509) [HTML](0) [PDF 344.31 K](138)
    Abstract:
    Based on comparing with the existing parallel algorithms for mining association rules, the paper analyzes CD,FDM,DDM algorithm in details. To overcome problems existing in efficiency of candidate sets pruning and execution time of these algorithms, the paper proposes parallel process algorithm with an improved parallel association rules. Finally the result of test on share-nothing cluster of workstation show that after adopting the improved algorithm, execution performance and efficiency are higher than others. This result indicates that the algorithm has achieved algorithm optimization.
    23  Approximate reasoning algorithm based on the causality diagram
    WANG Hong-chun~
    2004, 27(8):96-99.
    [Abstract](765) [HTML](0) [PDF 225.82 K](169)
    Abstract:
    The Causality Diagram, which adopts graphical expression of knowledge and direct causal intensity of causality, overcomes some shortages in Belief Network and has evolved into a mixed causality diagram methodology coped with discrete and continuous variable. But the Causality Diagram's reasoning calculation is a NP problem. It is inconvenient its popularize and application. This paper presents an approximate reasoning algorithm, and it cuts down the Causality Diagram's steps and harsh condition, it makes the complexity of the algorithm the same order of the joint events. A reasoing example justifies our algorithm.
    24  FEM analysis on the earth pressure behind the panel of post-panel retaining wall
    ZHOU Shi-liang~
    2004, 27(8):100-104.
    [Abstract](624) [HTML](0) [PDF 406.16 K](1131)
    Abstract:
    the distribution of earth pressure behind the panel of post-panel retaining wall is analyzed with 3-D FEM. Eight-crunode isoparametric element is adopted, concrete is regarded as linear elastic object, soil is regarded as elastic-plastic object, an interface model is introduced to simulate the interaction between concrete and soil.It is demonstrated that the earth pressure behind the panel of post-panel retaining wall is greatly different from the classical earth pressure theory, its distribution is close to a parabola. Based on FEM analysis, a modified formula is induced to calculate the earth pressure behind the panel of post-panel retaining wall, the engineering design by this modified formula will be more economical and reasonable.
    25  2-D water quality numerical simulation of the river by using stream tube-FVM
    ZHAO Wan-xing CHEN Jing-qiu
    2004, 27(8):105-108.
    [Abstract](735) [HTML](0) [PDF 316.42 K](1104)
    Abstract:
    The contamination transplant-diffuse mechanism in shallow river is analysed. FVM is applied to the stream tubes, according to mass conservation principle and established the 2-D finite volume model in the contamination concentration field (CCF). This method is applied to simulate water quality of some section of Yangtze River and Jialing River around Chongqing city, which is simple and effective.
    26  Surface structure of the flow field of the jet with diamond orifice in a supersonic flow
    FAN Huai-guo
    2004, 27(8):109-112.
    [Abstract](584) [HTML](0) [PDF 390.16 K](1332)
    Abstract:
    在不同射流角(10°,27.5°,45°,90°)和射流总压下(0.1 MPa,0.46 MPa)对音速射流通过15.半角菱形口喷射到马赫5横穿主流的实验及圆形喷射器的对比实验,研究了具有菱形喷口的射流用于超音主流的相互作用流场.通过表面油流动可视化和表面压力敏感涂料的方法,得到了流场的表面结构.结果表明相互作用激波的状态(附着与离体)基于射流入射角和喷射压力,在高射流角和低喷射压力下相互作用激波保持附着,前沿相互作用激波角随射流角增加而增加.对离体激波情况,马蹄涡延展到上游,最高表面压力与马蹄涡相关,上游峰值压力随喷射压力的增加而增加.90.圆形喷射器与90.菱形喷射器有类似表面结构,但在给定的射流总压下其峰值压力较后者高,而且激波分离距离较大.
    27  Experiments on the eutectic salt used as low temperature cool storage material
    LI Xin-ren TONG Ming-wei WU Bi-rong
    2004, 27(8):113-115120.
    [Abstract](796) [HTML](0) [PDF 396.12 K](2136)
    Abstract:
    Binary eutectic salt is fit for low temperature cool storage in industry based on the theory of thermodynamics. Two sorts of binary eutectic salt were found by the experiments of freezing and melting. The thermophysical properties including freezing point, melting point, super-cooling degree and thermal stability during phase change process were investigated. The results show that these two sorts of binary eutectic salt are hope to be suitable for low temperature cool storage.
    28  Research on quantitative correlation between chemical enthalpy of wastewater pollutants and their traditional water qulity indexes
    GAO Xu GUO Jin-song FANG Fang Ministry of Education Chongqing University Chongqing China .Faculty of Urban Construction Environmental Engineering Chongqing University Chongqing China)
    2004, 27(8):116-120.
    [Abstract](624) [HTML](0) [PDF 404.78 K](1223)
    Abstract:
    Thermodynamic approach is applied to energy utility of wasterater treatment process, definition and calculation of pollutants' chemical energy would be primary. According to the First Law of Thermodynamics, the concept of pollutants' chemical enthalpy advanced, and criterion for calculating chemical enthalpy is integrated, and enthalpy calculation method of complex organic substances established too in this paper. Then enthalpy was coulped with traditional water quality index-COD. Energy analysis conclusions of various processes in wastewater treatment and different classification energy can be comparable through the study, energy index becomes easy to be linked up with traditonal water quality mensuration.
    29  Experimental research on dynamical characterristics of rock in fei xianguan northeast in sichuan
    YIN Guang-zhi SUN Guo-wen ZHANG Dong-ming
    2004, 27(8):121-123127.
    [Abstract](966) [HTML](0) [PDF 331.37 K](1427)
    Abstract:
    Rock(sandstone, ash stone) in fei xian guan northeast Sichuan was used as rock sample,Experimental research on elasticity wave in room was done by testing technology of sound wave. The speed of elasticity wave and the dynamical elasticity parameter is calculated by the experiment. After the experiment, the physics mechanic character of rock is analyzed by experiment data.
    30  Process control for block erection of towering structures by bliding
    CUI Bi-hai ZHENG Zhou-lian ZHAO Chang-rong
    2004, 27(8):124-127.
    [Abstract](512) [HTML](0) [PDF 327.12 K](1119)
    Abstract:
    Towering structures are usually of imposing height, heavy weight and poor bending and torsional rigidities. Hence, their block erection is a technology-intensive cours. Traditional manual control can hardly meet the requirements of the overall process and guarantee its safety. The combination of computer technology with conventional hoisting techniques is applied to the block erection process of towering structures to do the process study of the hoisting system first of all, and to acquire data with instruments and devices according to the process study so as to aid the decision-making and process control of block erection, to realize automatic execution of emergency measures and to guarantee the safety in the course of hoisting.
    31  Laboratory similar model test investigation of prestressed anchor rope strengthened slope fractured rock mass
    ZENG Xiang-yong~
    2004, 27(8):128-131135.
    [Abstract](614) [HTML](0) [PDF 414.13 K](1081)
    Abstract:
    Now in the highway construction of the mountain area, fractured rock mass slope always strengthened by the anchor rope. In order to investigate the strengthen effect of the slope fractured rock mass strengthened by the prestressed anchor rope, laboratory similar model test was designed and preceded. By the self-made facilities, a new method of modeling prestressed anchor rope was used in the test. Nylon ropes and the aluminum flakes were used to model the anchor rope and discrete rock mass joints. Gypsum based mix material was used to model rock. According to the real slope engineering site circumstances, six sorts of different disposed prestressed nylon rope strengthened model specimens and the specimens without prestressed nylon rope were made by the similar theory. With the test results, the strength and deformation properties of different model specimens were investigated. Comparison to different anchor effects of the different model specimens was made. The final analysis shows that in order to make full use of the anchor rope's strengthen ability, anchor rope should be disposed perpendicularly to the fracture structure rock mass's main joint direction and should be placed in the upper or top area of the fractured rock mass slope.
    32  Path planning in 3-D space for robot based on ant colony algorithm
    HU Xiao-bing~
    2004, 27(8):132-135.
    [Abstract](884) [HTML](0) [PDF 318.09 K](1051)
    Abstract:
    In this paper the ant colony algorithm is applied to path planning problem in 3-D space for robot. First of all, the space between the origin where the robot is located and destination was divided into a three dimensional grid, at the same time the valid path from origin to destination is defined, then all the ants will leave from the origin, selecting next vertex independently in three dimensional grid, to the destination on a valid path. The simulated experiment shows that the algorithm is efficient and has a great convergence rate.
    33  The existence of limit cycles of some non-linear differential equations
    ZHANG Mou WEI Shu-guang
    2004, 27(8):136-138.
    [Abstract](571) [HTML](0) [PDF 165.68 K](1232)
    Abstract:
    The existence of limit cycles for the nonlinear oscillation equation is discussed, in which some hypothesis is omitted. The results of theorem 1 generalized the corresponding results for\.
    34  Conversion ratio model of the convertible bond
    MENG Wei-dong QI Xiao-jun WANG Lei
    2004, 27(8):139-141155.
    [Abstract](710) [HTML](0) [PDF 282.35 K](178)
    Abstract:
    将可转换债券看作内嵌期权和内含债券的组合物,从投资者一般投资心理考虑问题,即投资者是否投资取决于投资收益率大于其事先设定的投资收益率底线的可能性,得到可转换债券转换比率模型.通过模型的解发现:可转换债券转换比率仅仅与可转换债券内嵌期权和内含债券两者收益率均值、方差以及两者的相关系数有关,转换比率是内生变量.模型提供了客观确定可转换债券转换比率的方法和理论指导.
    35  Synthetic incentive mechanism
    ZHANG Chao-xiao~ PU Yong-jian~
    2004, 27(8):142-147.
    [Abstract](697) [HTML](0) [PDF 492.56 K](147)
    Abstract:
    Economic incentives are divided into three forms of incentive means, such as fixed wage, piece rates wage and promotion prize. Relationship between the three means is analyzed, and the notion of synthetic incentive is put forward. An enterprise should apply the three paying means synthetically to stimulate its workers to work hard. How the factors such as the level of ability, risk aversion, product error and difference of prize influence the optimum piece rates, and how these factors and the market price influencing the activities of the workers are studied. The incentive effect of pyramid-stylized wage structure and the internal mechanism that workers are divided into different kinds according to their ability level are analyzed.
    36  A game analysis on the personal behavior modes under governmental regulation
    LIAO Cheng-lin QIAO Xian-mu JIN Jun
    2004, 27(8):148-150.
    [Abstract](730) [HTML](0) [PDF 318.82 K](217)
    Abstract:
    Market economy is the credit economy and principal of credibility is the foundation of market mechanism. With the development of economic reform, it is well concerned that discredit order of the society has become one of serious social problems which enhance the transaction cost of society. By using games analysis, reasons of discredit are studied based on personal behavior models under governmental regulation. According to the result that discredit is the result of personal choice under the existed institution, we should establish social credit management system to deal with the discredit based on credit information supplied by the independent third-part organization.
    37  Review on the measurement theories of enterprise knowledge management during the past three years in China
    ZHENG Jing-li SI You-he XIONG Zheng-fang
    2004, 27(8):151-155.
    [Abstract](579) [HTML](0) [PDF 429.27 K](151)
    Abstract:
    The implement of enterprise knowledge management gives rise to extensive research on its measurement. Based on the existing measurement theories and evaluation index systems of enterprise knowledge management during the past three years in China, this paper analyzes the problems in measuring target and designing the evaluation index system in the existing research findings, and explains detailedly why measurement target of enterprise knowledge management should be "level evaluation" instead of "performance evaluation", and definitely points out the meanings of enterprise knowledge management level and significance of its evaluation. This paper also indicates that the design of the evaluation index system should be complete, reasonable, proper and operable.
    38  Contracts of risk sharing of the enterprise, the employee and the dealer
    TAN Jian-chun
    2004, 27(8):156-159.
    [Abstract](459) [HTML](0) [PDF 312.45 K](128)
    Abstract:
    The output of the enterprise changes with the change of natural states, therefore it brings relatively great risk to enterprise. The enterprise hopes to reduce the same kind of risk through more contracts than one kind of contract of risk sharing. This paper presents a new method to disperse the same kind of risk in two kinds of ways. Basing on principal-agent theory, through the optimum contract of risk sharing, the Pareto-optimum solving is solved-the optimum contract of risk sharing. The employee shares some risks through the optimum contract of risk sharing between the enterprise and the employee-when the output is high, the employee's income increases; when the output is low, the income decreases. In order to reduce the risk of the enterprise further, the dealer also shares the risk. To maximize the utility of the enterprise, the Pareto optimum solving is given-another optimum contract of risk. The dealer offers following contract of risk sharing to the enterprise-when the output is high, the dealer receives the repayment; when the output is low, the enterprise is compensated. The enterprise, the employee and the dealer share the risk together, thus the risk of the enterprise is reduced to relatively great degree.
    39  Validitv of the information sharing in cyber supply Chain
    WU Xuan-hong CHEN Sa
    2004, 27(8):160-163.
    [Abstract](635) [HTML](0) [PDF 332.12 K](159)
    Abstract:
    The application of supply chain bring us some questions which need to be solved immediately. Bullwhip effect is one of these. We can lighten bullwhip effect through information sharing. The enterprises in SC need long, balance relationship. From Game Theory, the relationship could get. Through the stock information sharing cost analysis of two-stage SC against no sharing, the information sharing is not only need but also efficiency. The core enterprise in SC should use the Principal-agent theory to pursue information sharing with other enterprises.
    40  Comprehensive measure of human resource in journal society
    CHEN Yi-feng
    2004, 27(8):164-166.
    [Abstract](525) [HTML](0) [PDF 278.73 K](270)
    Abstract:
    Human resource is the most important resource. The status quo is evaluated with material measure, gross capital, cultural structure, and title structure,etc. The solution of human resource development and management is given.

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