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Volume 28,Issue 1,2005 Table of Contents

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    • 1  Application of Object-oriented Representation in the Motorcycle Designed Expert System
    FENG Hao ,  HE Yu-lin ,  MA Fang-lan ,  DU Jing
    2005, 28(1):1. DOI: 10.11835/j.issn.1000-582X.2005.01.001
    [Abstract](782) [HTML](0) [PDF 426.87 K](158)
    Abstract:
    Knowledge representation is one of the key technologies in the designed expert system.According to the requirement of total design of motorcycle, this paper researches the classificationof knowledgeand experienceof the motorcycle, analyses the points of knowledge representationmethod such as production rule, frameworkand object-oriented and so on, and puts forward the object-oriented knowledge representation method which is combined with abstraction, encapsulationand inheritanceof object-oriented technique. At last the authors realizes the knowledge representation of motorcycle designing under the language environmentof C++ and givesthe knowledge representationexamples of motorcyclebodywork designing.
    2  Current Status and Trend of Preparation of Nanometer Material
    TANG Yi-ke ,  XU Jing ,  WEI Li-fan
    2005, 28(1):5-10. DOI: 10.11835/j.issn.1000-582X.2005.01.002
    [Abstract](1085) [HTML](0) [PDF 660.38 K](164)
    Abstract:
    The characteristics of nanometer material are presented in brief.Referring many domesticand overseas passages or sources , different processes, characteristics and progress of preparation are summarized. These processes include gas reacting process, precipitation process, micro-emulsion mediated process, sol-gel process, thermal process of solvent, solid reacting process, SPD process, liquid process in ultrasonicfield, supercritical fluid drying process ,self-assembled process. At present, uniform nanocrystals with an average particle size of about 5 nm can be obtained. Growth of crystals can be controlled to a certain extent in some oversea laboratory. Hence special size, special shape and special structurecan be obtained by selecting different method and preparation condition. In addition, developmental trend of preparation for nanometer is presented.
    3  Knowledge-based ECG Automatic Diagnosis System
    ZHAO Ling ,  TANG Bao-ping ,  JIAO Zhi-feng ,  JI Zhong
    2005, 28(1):11-14. DOI: 10.11835/j.issn.1000-582X.2005.01.003
    [Abstract](712) [HTML](0) [PDF 348.84 K](125)
    Abstract:
    This paper presents the structure of a knowledge-based ECG automaticdiagnosis system and the key technologies applied in the system. Using database technology to store, the ECG knowledge-database is constituted of ECG knowledgeand a set of rules .The inference engine of the system simulates the real diagnosis of the experts and combines the forward reasoning with inexact reasoning. At the same time, complicated reasoning is avoided. Because the inference engine is independent of what is stored in the ECG knowledge-database, the system is suitable for expert system.
    4  Exhaust Muffler Design of Automotive Based on Acoustic Transfer Matrix
    HU Yu-mei ,  XU Xiang-lin ,  CHU Zhi-gang ,  LI Jing-yuan
    2005, 28(1):15. DOI: 10.11835/j.issn.1000-582X.2005.01.004
    [Abstract](835) [HTML](0) [PDF 430.84 K](237)
    Abstract:
    基于消声器声传递矩阵法,推导了几种非基本声学子结构的声传递矩阵,编制了消声器性能仿真计算及优化程序,利用该程序针对某实际汽车排气消声器进行了结构优化设计,并使该消声器满足该车车外加速噪声控制和实际空间布置要求.在此基础上,对改进的消声器进行了发动机台架插入损失和功率损失实验.结果表明,设计的消声器消声性能良好,其最大消声量达到22.9 dB(A),且内燃机的输出功率变化不大,满足该车对消声器提出的性能要求.
    5  Networked Optimal Cutting-stock System Based on Web Service
    ZHU Bo ,  YAN Chun-ping ,  LIU Fei ,  DENG Tai-lin ,  HE Li-mei
    2005, 28(1):19-23. DOI: 10.11835/j.issn.1000-582X.2005.01.005
    [Abstract](483) [HTML](0) [PDF 454.25 K](1030)
    Abstract:
    With the analysis of the problem in traditional optimal cutting-stock technology , this paper sets forth the significance of networked optimal cutting-stock . After that , a new kind of networked optimal cutting-stock system, based on Web Service technology , is presented .Then the constructing process , architecture and mechanism of this system are expatiated respectively. Centered onWeb Service , this system combines the networked multi-software optimal calculating model with cutting-stock system , by building updifferent granularity service and supporting multilayer service invocation .According to experiment , the system this paper discusses can effectively improve comprehensive optimal efficiency of cutting-stock.
    6  Feature Recognition Based on Vector Picture
    WANG Tong-qing ,  HUA Jin ,  LU Jun ,  NI Shui-ping
    2005, 28(1):24-27. DOI: 10.11835/j.issn.1000-582X.2005.01.006
    [Abstract](698) [HTML](0) [PDF 367.79 K](1298)
    Abstract:
    The technologyof recognition and understanding architecture engineering drawings by computer is a study hotspot in the field that computer isapplied in engineering research. Based on the characteristicof architectural ichnographyand criterionof architectural design fires prevention, the recognizing identification method and main program based on DXF format is proposed. Experimental results show that it has a preferableautomatic recognition results on the architecture ichnography,and effectivelyimproves the work efficiency.
    7  MPEG Layer Ⅲ Decoder Design Based on DSP
    LUO Jun ,  FU Li
    2005, 28(1):28-31. DOI: 10.11835/j.issn.1000-582X.2005.01.007
    [Abstract](774) [HTML](0) [PDF 318.22 K](1365)
    Abstract:
    The design of MP3 decode system based on DSP is introduced. TLV320AIC23, a high performance and stereo codec chip, is selected as a D/A converter in the system. Two McBSPs ofDSP are connected to TLV320AIC23, one of them acts as configuration interface, the other ,the audio digital interface. Configuration interfacemode is SPI. The MP3 audio bitstreamtransmissionbetween the PC and DSP isrealized through the USB1.1 interface. So it is convenientto access MP3 audio bitstream. A large capacitymemory device, Compact Flash Card , is a storage media accessing MP3 bitstream.a programmable logical device, CPLD, controls reading, writing and chip selection of USB and Compact Flash Card. Some experiments show the systemcan well accomplish MP3 decodingand playing.
    8  Temporal-spatial Filtering in the Preprocessing of Clinical EEG Signals
    MIAO Xiao-bo ,  HE Wei ,  YANG Hao ,  LU Shan ,  DONG Wei-wei
    2005, 28(1):32. DOI: 10.11835/j.issn.1000-582X.2005.01.008
    [Abstract](684) [HTML](0) [PDF 526.75 K](1108)
    Abstract:
    EEG spot-recording for clinical patients in the bed is always advocated due to easing patients and making them comfortable. But EEG signals recorded in the ward exposed to various noisesand interference is less effective in the EEG analysis. Atemporal-spatial filter is designed for noise removing of clinical EEG signals, the first filtering is temporal filtering using band-pass filter, and the second filtering is spatial filtering with ICA-based spatial filter. Experimental results indicate that various noises and interferences, such as power interference, blinking, eyes movements, muscle moments, ECG artifacts, etc., are removed effectively, individually or simultaneously.
    9  Environment Friendly Dielectric Fluid Refined from Vegetable Oil
    CHEN G ,  LI Xiao-hu ,  LI Jian ,  SUN Cai-xin ,  DU Jun ,  CHEN G
    2005, 28(1):36-41. DOI: 10.11835/j.issn.1000-582X.2005.01.009
    [Abstract](697) [HTML](0) [PDF 519.02 K](1578)
    Abstract:
    开发环保型液体绝缘材料是目前国内外研究的重点和热点课题.植物油具有较高的燃点和闪点,几乎可以完全生物降解,其电气性能与矿物油相当,有较强的吸水性,有利于延缓绝缘纸老化速度.通过纳米、微胶囊及复配等技术可增强降凝剂和抗氧化剂的性能,提高植物绝缘油的稳定性和适用性.通过对植物绝缘油纸绝缘模型电气及老化性能的研究,可为设计和制造植物油配电变压器及大型油浸式电力变压器提供理论依据.结合国外近年来的研究成果,分析总结了目前植物油的优点及存在的不足,并提出了相应的对策.
    10  BP Neural Networks and Its Application in Lung Cancer Intelligent Diagnosis System
    HUANG Xue-mei ,  TANG Zhi-de ,  ZHAO Yi-fan ,  SHU Zhi-qiang
    2005, 28(1):42-44. DOI: 10.11835/j.issn.1000-582X.2005.01.010
    [Abstract](587) [HTML](0) [PDF 318.25 K](911)
    Abstract:
    The learning algorithm of networks is discussed. The programming example of 3 layer BP networks is given with Visual C++6.0 program langue. Based on this model, a lung cancer intelligent diagnosis system is successfully implemented. Furthermore, the paper introduces network's structure design, preferencesand the source of stylebookdatum in factual applications. The ameliorative arithmetic is applied to the study of networks and BP dynamic evolving process is designed. The experiments indicatecell images are recognized and classified by the trained neural network. The study illustrates the system has feasibility and clinical value in lung cancer diagnosis.
    11  Unit Commitment fo Considering Bidding Units Integer Characteristic in Electricity Market Environment
    ZHOU Ping ,  CHEN Qi ,  ZHOU Jia-qi ,  MA Ling ,  XU Ming
    2005, 28(1):45-48. DOI: 10.11835/j.issn.1000-582X.2005.01.011
    [Abstract](470) [HTML](0) [PDF 371.67 K](890)
    Abstract:
    以价值工程和电力系统可靠性理论为指导,针对目前发电市场中机组组合问题研究存在的未充分协调机组经济性和可靠性不足,提出了一种基于竞价机组运行价值的新模型,该模型以系统竞价机组的运行价值之和最大为优化目标,兼顾了各竞价机组运行的经济性和可靠性,其结果可为公平合理的发电计划制定,提供量化决策依据.通过算例分析,表明文中提出的方法比其他方法更全面、更合理.
    12  Summary of On-line Monitoring and Fault Diagnosis Technique for Induction Motor Basede on Mcsa
    ZHOU Feng ,  WANG Ming-yu ,  DU Yan-wei
    2005, 28(1):49-52. DOI: 10.11835/j.issn.1000-582X.2005.01.012
    [Abstract](566) [HTML](0) [PDF 368.92 K](1162)
    Abstract:
    异步电动机的典型故障包括轴承故障、转子气隙偏心、断条故障等.对异步电动机主要常见故障的成因和表现特征进行分析和总结.针对上述各种故障,对基于MCSA(Motor Current Signature Analysis)的故障监测和诊断方法作了全面的介绍,较为详细地介绍了各种方法的原理,并讨论了其优缺点.并指出了今后的发展趋势及工作重点.
    13  Structure Refining Effect of Die Casting on the Hypoeutectic Al-11Si-1.8Cu Alloy
    YANG Ming-bo ,  PAN Fu-sheng ,  PENG Xiao-dong ,  ZHAO Wei-lin
    2005, 28(1):53. DOI: 10.11835/j.issn.1000-582X.2005.01.013
    [Abstract](696) [HTML](0) [PDF 508.85 K](121)
    Abstract:
    On the basis of different casting conditions such as normal gravity casting and high pressure die casting, the structure refining effect of die casting on the hypoeutectic Al-11Si-1.8Cu alloy is investigated by structure analysis. The research results indicate that compared with normal gravity casting, die casting can obviously refine the primary a-Al and eutectic Si phase of Al-11Si-1.8Cu alloy, and the morphology of primary a-Al changed from dendrite shape to spherical shape. Furthermore, under the condition of high pressure die casting, with the casting pressure increasing, the spherical morphology and size of primary a-Al are more round and small respectively, and the precipitaion of eutectic Si phase is suppressed simultaneously.
    14  Visualization Experiment of Saturated Steam Transient Condensation on Subcooled Liquid Surface
    ZHAO Jian-gang ,  TONG Ming-wei ,  LI Kui-ning
    2005, 28(1):56-59. DOI: 10.11835/j.issn.1000-582X.2005.01.014
    [Abstract](673) [HTML](0) [PDF 358.59 K](153)
    Abstract:
    为了研究饱和蒸汽射入水中和在过冷液面的凝结特性,实验采用S270A型红外热成像仪取代了前期实验的热电偶,精确测出了CMT内蒸汽凝结过程的温度变化.根据实验结果发现热水层的再分层现象,并揭示热水层随时间的变化趋势.最后计算出有、无遮流板时的瞬态凝结换热系数;加遮流板时压力平衡前的凝结换热量占了总换热量的62%～76%,无遮流板时体换热系数最大达到了约70 000 W/(m3·℃).
    15  Operation Optimization of Ball Type Pulverizer Based on System Identification
    LUO Zi-zhan ,  HE Zu-wei
    2005, 28(1):60-64. DOI: 10.11835/j.issn.1000-582X.2005.01.015
    [Abstract](581) [HTML](0) [PDF 384.89 K](123)
    Abstract:
    The ball type pulverizer system is widely used in power plant in China because of its better coal adaptability, easy maintenanceand high reliability. However, its primary disadvantageis high power consumption. Itis not only the big consumer of power plant ,but also thebig latenteconomizer. Some existentresearches mostly focus on pulverizer, not on the ball type pulverizer system. An operation optimization method is presented in the disquisitionbased on the system identification. By selecting data upon orthogonal norm , acquiring the system model through Least Squares method, and according to the theory of optimization, the authors obtain the optimal values of controlledparameters.This method can avoid disadvantageboth of searching for the input-output specialty through mechanismmodeling and big data sample space for Manual Neural Network. It is valuable in practice for the ball type pulverizer system operation optimization and economizing energy in power plant.
    16  Affection of Piercing Process Factors to the Shell''''s Outer Fold of Continuous Casting Billets
    ZHANG Cai-an ,  LU Zhi-wen
    2005, 28(1):65-67. DOI: 10.11835/j.issn.1000-582X.2005.01.016
    [Abstract](544) [HTML](0) [PDF 276.43 K](85)
    Abstract:
    随着连铸技术的发展,无缝钢管生产广泛采用水平连铸坯直接穿孔.但是,水平连铸坯的应用,使毛管的内外折缺陷数量也明显增加,其中,又以外折最为严重,以成都某钢管厂为例,外折约占毛管缺陷总量的93.3%,年经济损失近320万元.研究了穿孔调整参数和管坯加热制度对连铸坯毛管外折的影响.适当减小导板距,增大轧辊距,减小穿孔椭圆度;适当提高管坯加热温度和延长加热时间,均能显著减少穿孔毛管的外折缺陷,提高金属收得率.生产实践证明,按照提出的工艺方案,外折数量可减少40.75%,经济效益显著.
    17  Encryption Algorithm Based on RSA
    WANG Qian ,  NI Jian-wei
    2005, 28(1):68-72. DOI: 10.11835/j.issn.1000-582X.2005.01.017
    [Abstract](849) [HTML](0) [PDF 445.80 K](160)
    Abstract:
    RSA加密算法是第一个较为完善的公开密钥算法,它的安全性主要依赖于大数分解的难度.在分析了RSA公钥加密系统和背包公钥密码系统存在的安全问题的基础上,将背包公钥密码的思想与RSA算法相结合,形成了一种新的加密算法,它不仅消除了RSA的安全性完全依赖于大数因式分解难度的特性,并且在加密信息的同时,实现了用户身份的验证,有效地防止了中间人攻击.最后,对该算法在智能卡上的应用做了简要介绍.
    18  The Research of Using BP Neural Network in Prediction of Woods Fire Insurance Grade
    ZENG Xiao-ping ,  LIU Jin ,  LIU De ,  LI Yong-hua ,  PU Xiu-juan
    2005, 28(1):73-76. DOI: 10.11835/j.issn.1000-582X.2005.01.018
    [Abstract](1064) [HTML](0) [PDF 396.78 K](142)
    Abstract:
    The relation between circumfluence index and woods fire.index is described. BP neural network is trained by the known circumfluence index and woods fire index. The restricted feedback and stimulant feed forwardcalculation are to realize self-organizational learningof BP Network.Thereby the nonlinear mapping between circumfluence index and woods fire.index isperformed. With this network, characteristic choice can be carriedout and the accurate prediction of woods fire insurance grade can be given. Its accurate prediction rate is 89%in spring and 82%in summer. The correctnessand feasibilityare illustratedwith the simulate results.
    19  Wavelet Analysis of Electrically Evoked Surface Electromyography Signals During Muscle Fatigue
    YAN Fang ,  ZENG Xiao-ping ,  HE Qing-hua ,  SONG Yan-yi
    2005, 28(1):77-81. DOI: 10.11835/j.issn.1000-582X.2005.01.019
    [Abstract](761) [HTML](0) [PDF 436.34 K](153)
    Abstract:
    By analysis of electricallyevoked surface electromyogram(SEMG) to suralmuscle, study the characteristics of SEMG signal during muscle fatigue. The time stretchingof two semi-ave of M-wave are analyzed respectively by wavelet method choosing wavelet function matching to M-wave. Indexes of muscle fatigue are educed accordingto the scale of wavelet transform, are the quantitative analysis is realized during muscle fatigue. This method overcomes the limitation of Fourier Transform that it has no resolution in time domain, find indicators of SEMG which are correct, reliable and easy to interpret, and try to providetheoretic referencefor the applicationsof these indicators.
    20  Encryption Algorithm Based on Chaotic Sequences and Its CPLD Implementation
    LI Qiang ,  YANG Xin ,  HUANG Xi-yue
    2005, 28(1):82-85. DOI: 10.11835/j.issn.1000-582X.2005.01.020
    [Abstract](493) [HTML](0) [PDF 405.86 K](966)
    Abstract:
    Encryption algorithm based on chaotic sequenceshave become an often-used encryption method, owing to its ease of generation, sensitive to its initial condition, complex pseudo-random. The authors discuss an encryption algorithm based on chaotic sequences. The algorithm needs to generate two chaotic sequencesand uses m-sequencesas the perturbation sequencein order to enhance security. According to the algorithm mentioned above, they design the encryption and decryptionchip using AHDL(Altera Hardware Description Language)and implement it with CPLD.
    21  Shift Control for Automated Mechanical Transmission
    HUANG Jian-ming ,  CAO Chang-xiu ,  SU Yu-gang
    2005, 28(1):86-89. DOI: 10.11835/j.issn.1000-582X.2005.01.021
    [Abstract](1086) [HTML](0) [PDF 394.90 K](1384)
    Abstract:
    The gearshift of an automated mechanical transmission is performed by cutting off the power.The key to the gearshift of AMT is shift quality.Theinfluence of the control stategy during shifting processon shift quality is analysed.While resuming the power,the derivative of the speed differencebetween the clutch active disc and the clutch slave disc time instant is in direct proportion tothe discontinuity of the vehicle acceleration at the lock-up time instant.The large discontinuity of the vehicle acceleration will result in the jerk and the oscillation of vehicle that make passengers uncomfortable.A control stategy is proposed,that make small the derivative of the speed differencebetween the clutch active disc and the clutch slave disc by the integrated control of engine and clutch.The road test shows that the control stategy improves the shift quality.
    22  Design of Automobile-inertia-brake-testing-system Based on Electrical-inertia
    SHENG Chao-qiang ,  XIE Zhao-li
    2005, 28(1):90-92101. DOI: 10.11835/j.issn.1000-582X.2005.01.022
    [Abstract](698) [HTML](0) [PDF 332.75 K](1278)
    Abstract:
    The traditional Automobile-inertia -brake-testing-system adopts the Mechanical Inertia pan to imitate automobile the Moving Inertia. This kind of system volume is bigger than new one, more difficult in inertia adjusting, and lower in automation degree. Aiming at the problems, this paper puts forward the innovative design of Automobile-inertia-brake-testing-system based on electrical inertia. The mathematic model of the Mechanical Inertia is analyzed. To use the algorithm to control motor, the authors make the output inertia generated by the controlled motor can imitate the Mechanical Inertia, then apply electrical inertia to replace Mechanical Inertia .The simulation result shows that the design idea is correct and feasible, stronger in system rubustness, lower in cost, more accurate in control quality, and higher in automation level.
    23  Empirical Analysis on Return Distribution and Price-volume of SZCI
    CHEN Wei-yun ,  HUANG Man-hui ,  WU Yong
    2005, 28(1):93-96. DOI: 10.11835/j.issn.1000-582X.2005.01.023
    [Abstract](587) [HTML](0) [PDF 327.51 K](820)
    Abstract:
    This paper focuses on the day-of-the-week effect and contingency/persistency of the return rate series and the volatility in shenzhen stock index.It argues that there is not the day-of-the-week effect in return rate series but one to two weeks of contingency, while there is the day-of-the-week effect and persistency in volatility, and the trading volume is helpful to interpret the volatility.
    24  Income Smoothing Incentives from Voluntary Accounting Changes
    LIU Bin ,  XU Jia ,  LIU Ren
    2005, 28(1):97-101. DOI: 10.11835/j.issn.1000-582X.2005.01.024
    [Abstract](617) [HTML](0) [PDF 424.44 K](1106)
    Abstract:
    listed companies which had income smoothingwith voluntary accounting policy changes during 1998-2002 were chosen as sample. The authors studied on the incentives of the income smoothing of listed companies by the paired match of sample firms and the control sample firms, and then thngh the mean test, Wilcoxon sign rank test and Logistic regression models. The results show that the income smoothing has a positive correlation with the firm size, price restriction and compensation contracts. It is also characterized by income increase.
    25  IPOs Underpricing and Demand-to-offer Ratio: a Model of Signaling Games
    ZHOU Xao-hua ,  DU Jun-tao ,  YANG Xiu-tai
    2005, 28(1):102-104. DOI: 10.11835/j.issn.1000-582X.2005.01.025
    [Abstract](569) [HTML](0) [PDF 308.84 K](1114)
    Abstract:
    在假定承销商比投资者拥有更多信息,并将投资者分成有信息者和无信息者两大类的基础上,建立信号传递博弈模型以及实证分析,认为在中国新股发行过程中,中签率的确可以作为IPOs内在质量的信号传递给投资者.不考虑完全包销的情况下,中签率越高的IPO公司初始报酬率就越低,相反中签率越低的公司,待其上市时会获得更高的初始回报.
    26  Strategic Decision Model of Green Supply Chain Management
    LUO Bing ,  ZHAO Li-juan ,  LU Na
    2005, 28(1):105-109. DOI: 10.11835/j.issn.1000-582X.2005.01.026
    [Abstract](688) [HTML](0) [PDF 451.19 K](101)
    Abstract:
    With increased emphasis on the natural environment by stakeholders, the need for explicit consideration and incorporation of environmental strategy has been critical within organization strategic plans and their operations. While in the scope of green supply chain management strategy decision is more important. The authors study the components and elements of green supply chain management and how they serve as a foundation for the decision framework. The structure of framework is network hierarchy, so the authors apply analytic network process (ANP) tool which was first introduced by Saaty. An illustrative example is used to explore the application of the ANP technique to this problem.
    27  Handicap to Banking''''s Reform by Scarcity of Credit Culture
    WU Rui-fan ,  SHI Xiu-ling
    2005, 28(1):110-112. DOI: 10.11835/j.issn.1000-582X.2005.01.027
    [Abstract](510) [HTML](0) [PDF 250.41 K](90)
    Abstract:
    This paper demonstrates that if the credit culture of the public product does not have a ownership of exclusiveness,the credit of the whole society will be explo ited excessively. That leads the whole societyforfeits sincerity. The authors use an example for guiding, expands foreign capitals bank to the recessive crisis in the whole society of China, and points out the importance of sincere construction.
    28  Analysis of Adverse Selection in the Credit Market and the Impact of Mortgage Means
    ZHOU Xun-qian ,  TAN Jin ,  SUN Yue-fang
    2005, 28(1):113-116. DOI: 10.11835/j.issn.1000-582X.2005.01.028
    [Abstract](783) [HTML](0) [PDF 346.11 K](242)
    Abstract:
    From the impact of mortgage loan on the degreeof investment risk and the expected profit of bank,the authors draw the conclusion that the risk of mortgage loan is larger than the risk of credit loan when the gage is not enough by comparing mortgage loan with credit loan. And they also analyse the relation of the gage, loan rate, and adverse selection. The gage and loan rate are presented which can be use as themeans of examining information for the bank.
    29  Economy Benefits Analysis for Construction Informatization
    WANG Yan ,  ZHANG Li ,  LIU Jian
    2005, 28(1):117-120. DOI: 10.11835/j.issn.1000-582X.2005.01.029
    [Abstract](560) [HTML](0) [PDF 316.61 K](199)
    Abstract:
    Focused on the characteristics of construction industry, referencing the Cobb-Douglas Function, the authors bring forward the theoreticcalculation formula, whichreflects the contribution of IT to construction enterprise production. And based on this,by referencing the NPV function, the authors propose the economy benefitcalculation formulafor calculating the application of IT. These can be used to value the application of IT for contractors, and help the contractors make a strategic decision for enterprise informatization.
    30  Effect of the Influent Concentration of COD on Denitrifying Phosphorus Removal in the Spiral Up-flow Reactor System
    LUO Gu-yuan ,  ZHANG Rui-xue ,  WANG Dan-yun ,  JI Tie-jun
    2005, 28(1):121-125. DOI: 10.11835/j.issn.1000-582X.2005.01.030
    [Abstract](620) [HTML](0) [PDF 407.39 K](287)
    Abstract:
    对螺旋升流式反应器(Spiral Up-Flow Reactor, SUFR)中进水COD浓度对反硝化吸磷的影响进行了深入的研究,通过分析发现:1)缺氧反应器内出现了明显的反硝化吸磷现象,且当COD浓度在250～450 mg/L时效果显著;2)当进水COD浓度在400 mg/L左右时,厌氧释磷量和缺氧吸磷量均达到最大值,并且缺氧吸磷效率也最高;3)对不同COD负荷下厌氧释磷速率、缺氧反硝化吸磷速率以及PHB之间的关系进行分析.
    31  Application of Multi-vertical-line-element Model of RC Walls and Discussion on IT
    WEI Feng ,  YANG Hong ,  BAI Shao-liang
    2005, 28(1):126-130. DOI: 10.11835/j.issn.1000-582X.2005.01.031
    [Abstract](714) [HTML](0) [PDF 481.75 K](122)
    Abstract:
    The inelastic dynamic response analysis program for frame-shear wall structures developed by the authors is introduced firstly, in which the multi-vertical-line-element model was adopted for shear walls and the refined single-component model was used for beams and columns in frame.By analyzing three-story structural models tested in shaking-table in a famous foreign research institute, the validity of the modeling of shear wall in the program was verified. The analytical results indicate that the inelastic dynamic responseof shear walls under random ground motion input can be predicted effectively withthe program. Finally, with the preliminary discussion of some key points in modeling of shear wall, some suggestions areput forward for further improving and refining the multi-vertical-line-element model.
    32  Practice of Convergence Displacement Measurement of Surrounding Rock in Tongyu Tunnel
    LI Xiao-hong ,  XIA Bin-wei ,  KANG Yong ,  ZHANG Jian-yu
    2005, 28(1):131-134. DOI: 10.11835/j.issn.1000-582X.2005.01.032
    [Abstract](797) [HTML](0) [PDF 377.70 K](177)
    Abstract:
    Tongyu tunnel has the following characteristicsuch as complex geological condition, deep depth, frequent water in flow, rock burst , high stress, etc., which seriously threaten the construction safety. In the tunnel construction, monitoring measurement is adopted strictly, especially for the convergence displacement measurement, and these data is processed in time to be turn back to the construction, then the stabilizationof the surroundingrock after being opened is known and the right measurement will be taken. The authors mainly introduce convergencedisplacementmeasurement technologyof the surrounding rocksand the theoryof data regression analysein the Tongyu Tunnel. the measurement result in Tongyu tunnel is shown, and it is expected to be reference to the similar engineer in future.
    33  Numerical Simulation on Drying Characteristics of a Combined Microwave-convection Process
    YU Li ,  MING Xiao ,  JIANG Yan-long
    2005, 28(1):135-139. DOI: 10.11835/j.issn.1000-582X.2005.01.033
    [Abstract](843) [HTML](0) [PDF 381.25 K](120)
    Abstract:
    Combined microwave-convection drying characteristics are investigated by numerical simulation. Combined microwave-convection drying has advantage of swift drying and sterilization. Based on qualitative analyses on the mechanism of combined microwave-convection drying, the differential equations are established and the numerical simulation method is described. The humidity, vapor pressure and temperature, along the radius in a spherical pill, are calculated by the numerical simulation during drying process. The calculation results show the relationship between humidity, vapor pressure, temperature and drying time, and that drying process is greatly influenced by input microwave power. The calculation results are good consistent with the experimental datum.
    34  FEM Dynamical Analysis of the Reinforced Concrete Beam with Bonding Steel Plate
    LIU Min ,  YIN Xue-gang
    2005, 28(1):140-142146. DOI: 10.11835/j.issn.1000-582X.2005.01.034
    [Abstract](769) [HTML](0) [PDF 169.14 K](172)
    Abstract:
    In order to researchmechanical capability of the reinforced concrete beam with bonding steel plate, adopting separatemethod to establish finite element model of the reinforced concrete beam with bonding steel plate, using FEM to study dynamical characteristics of the model, have got good results which can not be easily got using traditional resolution method, which can give referenceto study dynamical characteristics of the reinforced concrete beam with bonding steel plate.
    35  Stability Theorems of Certain Nonlinear Operators in Banach Space
    YANG Yong-qin
    2005, 28(1):143-146. DOI: 10.11835/j.issn.1000-582X.2005.01.035
    [Abstract](672) [HTML](0) [PDF 240.56 K](115)
    Abstract:
    设X是任意Banach空间,T:X→X是Lipschitz强半压缩算子.在没有条件limn→∞αn=limn→∞βn=0之下,证明了具有混合误差迭代程序的稳定性,并提供了这类迭代程序的收敛率估计.
    36  A Class of Nonlinear Burgers Equation Turning Point Problem
    WANG Geng
    2005, 28(1):147-148. DOI: 10.11835/j.issn.1000-582X.2005.01.036
    [Abstract](628) [HTML](0) [PDF 119.78 K](651)
    Abstract:
    讨论了一类二阶非线性广义Burgers方程形如ε(d2x)/(dt2) (A-Bx)(dx)/(dt)=0,t∈(0,1)的转向点问题(其中ε为正的小参数,A、B为实数且B≠0).在适当的条件下,用一种较简便的方法研究了转向点的所处位置,以及问题解的渐近性态.
    37  Experimental Studies on Electrolyte-gated Carbon Nanotube Field Effect Transitors
    LU Jian-wei ,  WANG Wan-lu ,  LIAO Ke-jun ,  WANG Yong-tian ,  WAN Bu-yong ,  KONG Ji-lan
    2005, 28(1):149-152. DOI: 10.11835/j.issn.1000-582X.2005.01.037
    [Abstract](1059) [HTML](0) [PDF 373.96 K](1186)
    Abstract:
    Owing to unique structure and characteristic of carbon nanotubes, much more are attractions, especially in molecular elements, including field effect transitorsmade of carbon nanotubes. Carbon nanotube field effect transitors with electrolyte-gated are investgated. Carbon nanotubes on glass substrate in this study are fabricated by hot filament vapor deposition using Fe / Ni as catalyst. Optimized multi-walled carbon nanobute transistors are made with Ag contact electrodes, and the KCl solution is used as a gate. Experimental results show that the electrolyte-gated carbon nanotube transitors exhibited a good voltage-current characteristic. The transconductance is about 0.5 mA/V at 2 V. The results obtained are discussed.
    38  Measuring of Quantity of Matter-mass and the Measuring of Inertia of Matter-momentclm
    DENG Zhao-jing
    2005, 28(1):153-156. DOI: 10.11835/j.issn.1000-582X.2005.01.038
    [Abstract](705) [HTML](0) [PDF 349.82 K](965)
    Abstract:
    A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed.
    39  Recent Development of Scientific Researches on Arsenics
    XIN Juan ,  WANG Yuan-liang ,  GUO Li-xia ,  ZHU Jiu-jin
    2005, 28(1):157-161. DOI: 10.11835/j.issn.1000-582X.2005.01.039
    [Abstract](963) [HTML](0) [PDF 462.70 K](1460)
    Abstract:
    In recent yuars,environmental arsenic contamination is a major problem in many parts of the world. There are many reports from many nations on human exposure to arsenic in drinking water has been linkedto various diseases and chronic arsenic poisoning symptoms . Though arsenic has been known as a poison for thousands of years, there have long been reports of benfical effects.Chinese medicine has used arsenic as a medicinal for thousands of years,especially studies have identified arsenic trioxide as a powerful and dramatic therapy for acute promyelocytic leukaemia(APL),which suggested many scholor use this drug to cure various tumors.
    40  Effect of Mechanical Stress on Cellular Signal Transduction and Gene Expression
    SHANG Juan-fang ,  WANG Yuan-liang ,  TANG Li-ling ,  NIU Xu-feng
    2005, 28(1):162-165. DOI: 10.11835/j.issn.1000-582X.2005.01.040
    [Abstract](834) [HTML](0) [PDF 393.22 K](1176)
    Abstract:
    The close relationship between stress and cell is summarized. Literatures at home and abroad are inspected. Biochemical reaction cause for stress acting on cell and changes of cytoskeleton signal transduction, correlation gene expression,are reviewed. Then, some gene expression changes induced by stress is systematically enumerated, such as immediate gene productions, cellular factors, enzymes, extracellular matrix molecules,etc. Finally, aiming at cellular stress response, some problems in the area are put forwarded, the molecular mechanism of stress and cellular response is expected to gain a step progress, and thoughts are offered to settle the physio-pathology changes of organism caused by stress.

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