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Volume 24,Issue 6,2001 Table of Contents

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    • 1  Quantifiable Technique for Product Definition
    CHEN Ya_hua ,  ZENG Li ,  LIU Wei ,  GUI Bai_wen ,  ZENG Li ,  FAN Jia_xiang
    2001, 24(6):1-4. DOI: 10.11835/j.issn.1000-582X.2001.06.001
    [Abstract](570) [HTML](0) [PDF 333.57 K](854)
    Abstract:
    Problems in the process of conversion from the Voice of Customer (VOC) to technical character of product using the House of Quality (HOQ) are analyzed, and a statistics-based quantifiable technique for product definition is developed to benefit adaptive design. With the underlying principles of HOQ, e.g. customer orientation and integration of marketing and engineering, this technique assures quality in concept design by means of various tools such as Design of Experiments (DOE) and Conjoint Analysis. The principles of the tools used are introduced briefly, and the realization process of the technique is discussed in detail with an example of the concept development of a minivan as its demonstration.
    2  A CAD System for Extrusion Aluminum-type Materials
    REN Guang_sheng ,  YIN Xiao_qing ,  TANG Wei
    2001, 24(6):5-8. DOI: 10.11835/j.issn.1000-582X.2001.06.002
    [Abstract](652) [HTML](0) [PDF 277.49 K](902)
    Abstract:
    A classifying_coding system in point of extrusion aluminum_type materials based on the statistics and analysis of large numbers of extrusion aluminum_type materials section drawings.According to the Group Technology principle,using the variant design technique,a CAD system has been developed and used in a extrusion aluminum_type materials factory.The system can not only greatly shorten the products design time and reduce the product cost,but also rapidly retrieve extrusion aluminum_type materials section drawings.
    3  Experimental Study on the Frictional Performance of Water Lubricated Plastic Alloy Bearings
    PENG Jin min ,  WANG Jia xu ,  YU Jiang bo ,  YANG Chen yun
    2001, 24(6):9. DOI: 10.11835/j.issn.1000-582X.2001.06.003
    [Abstract](750) [HTML](0) [PDF 246.53 K](973)
    Abstract:
    It's difficult to form hydrodynamic lubrication because of the low viscosity of water, but it is founded by experiment that there is low co-friction on water lubricated plastic alloy bearings working. The main factors that affect co friction are revs, loaded and clearance. Significance and effect of every factor that affect co friction is analyzed by variance analysis and orthogonal experiment. goaphs of every factor that affect co friction are list. From the goaphs, it is founded that there is elastic hydrodynamic because of elastic deformation in the plastic alloy.
    4  Speed Ratio Matching Strategies of Metal V-belt Type CVT System
    HU Jian jun ,  QIN Da tong ,  SHU Hong
    2001, 24(6):12-17. DOI: 10.11835/j.issn.1000-582X.2001.06.004
    [Abstract](745) [HTML](0) [PDF 446.39 K](1724)
    Abstract:
    The ratio control strategy and the relevant pulley clamping control strategy of the Metal Pushing V-belt Type CVT C Continuously Variable Transmission are key technology of CVT system matching. The engine output torque model and oil consumption model are given in numerical table by cubic spline interpolation to fit engine test result. Based on the engine speed feature, the speed ratio changing strategy of CVT in the numerical table are given to realize the optimal fuel economy and optimal performance mode within the ratio range of the CVT system.
    5  Knowledge Representation for Rotative Machine Fault Diagnosis Based on Semantic Net
    LI Tai fu ,  HUANG Mao lin ,  XIE Zhi jiang
    2001, 24(6):18-20. DOI: 10.11835/j.issn.1000-582X.2001.06.005
    [Abstract](451) [HTML](0) [PDF 258.52 K](185)
    Abstract:
    Aiming at knowledge representation problem of expert system for rotary machinery fault diagnosis, semantic net knowledge representation is discussed. Semantic net to represent expert knowledge of rotary machinery fault diagnosis is explored. Its realizing method is afforded in computer language, in addition, demostrating model is also developed in Visual C++. The result shows good validity of the knowledge representation.
    6  Experimental Study about Activated Water Produced by the Method of Electro-hydraulic Impulse Improving the Mechanical Performance of Mortar
    ZHANG Shi jin ,  LIAO Zhen fang
    2001, 24(6):21-23. DOI: 10.11835/j.issn.1000-582X.2001.06.006
    [Abstract](564) [HTML](0) [PDF 244.13 K](174)
    Abstract:
    With the development of the technology and the production,more and more high performance concrete(HPC)and high performance mortar(HPM)are needed.In order to get all kinds of high performance concrete and high performance mortar,a lot of researches have been done.For example,many researchers used the methods of magnetized water and electricalwater to improve the mechanical performance of the mortar. With these methods,the strengthening effect is not so good,and the value is fluctuated.They are not accepted extensively because of that.However,a method called electro_hydraulic impulse method is described in this paper.With this method,the mechanical performance of the mortar is increased by 20%.It must be pinted out that different results are gotten when different parameters are chosen.Because of the limited experimental conditions,the most optimized parameters haven't been found.So it can be sure that some better results can be gotten with the most optimized parameters.Comparing with other methods,the method of electro hydraulic impulse is more simple,more useful.
    7  Surface Reconstruction and Application Based on Shape Constraints
    CHEN Lang ,  QIN Da tong
    2001, 24(6):24-27. DOI: 10.11835/j.issn.1000-582X.2001.06.007
    [Abstract](521) [HTML](0) [PDF 281.10 K](183)
    Abstract:
    On the base of the fairing of free-form surface reconstruction from 3D data points, this paper probes one method based on shape constraints. By making physical model as objective function and using geometric constraints, free form surface reconstruction is realized based on the idea of energy optimization. This method is not only beneficial to the connection of the reconstruction surface and CAD/CAM system, but also to the integration of design, manufacturing and inspection.
    8  Research on Current Situation and Trend of Control Strategies for Hybrid Electric Vehicles
    SHU Hong ,  QIN Da tong ,  HU Jian jun
    2001, 24(6):28-31. DOI: 10.11835/j.issn.1000-582X.2001.06.008
    [Abstract](1294) [HTML](0) [PDF 357.82 K](548)
    Abstract:
    The vehicle's driving performances is determined by the control strategies and constructions of hybrid electric vehicles (HEV). The constructions of HEV are classified according to the change of state of charge of battery pack, and a study on current situation and trend of control strategies for HEV is presented in this paper. The research indicated that the current control strategies for HEV are not perfect and need further optimization. The control strategies should realize the optimum match among engine, motor, battery and transmission according to the characteristics of each component and vehicle's driving conditions. Many aspects including the fuel economy, emission, the life of battery pack, drivability, the reliability of each component and HEV's manufacture cost should be considered in the control strategies. A study on the control strategies and its optimization that take account of the aspects mentioned above is a work emphasis in the future. This paper also points out the PHEV equipped with small motor, small engine and continuously variable transmission is an ideal system construction for getting optimal fuel economy, lower emissions, steady drivability, lower manufacture cost and HEV's mass.
    9  Opportunities and Challenge for Chinese MSW Industry Development Induced by WTO
    LI Dong ,  HE Ming
    2001, 24(6):32-35. DOI: 10.11835/j.issn.1000-582X.2001.06.009
    [Abstract](567) [HTML](0) [PDF 379.53 K](176)
    Abstract:
    Prerequisites of Chinese MSW industry development are discussed here,which include management,tipping fee,preferential policy and law guarantee.Meanwhile the possible adverse problems are also expatiated and principled countermeasures are given.It is true that chances and challenge exist at the same time.The only access to chance and success is to speed reform,establish effective inspirited mechanism and perfect law and regulations.
    10  Computation of Natural Frequencies of a Rotating Beam
    JIAN Kai lin ,  YING Xue gang
    2001, 24(6):36-39. DOI: 10.11835/j.issn.1000-582X.2001.06.010
    [Abstract](697) [HTML](0) [PDF 275.09 K](251)
    Abstract:
    On Kane's dynamic equation,the ordinary finite element dynamic equation of a rotating beam is developed,and the apparent three dimension element matrices are obtained. Finally the natural frequencies of a rotating beam are figured out and compared with those of ordinary method.
    11  Discussion of Reliability Analysis Methods of Slope Stability
    TAN Xiao hui
    2001, 24(6):40-44. DOI: 10.11835/j.issn.1000-582X.2001.06.011
    [Abstract](697) [HTML](0) [PDF 340.16 K](192)
    Abstract:
    在边坡稳定的可靠度分析中，导数的求解及可靠度分析方法的选择是十分重要的。笔者分析指出：可以用简单的差分法来求解导数；对于边坡稳定性分析中常用的瑞典条分法及Bishop法，当基本变量C、ψ属于正态分布时，极限状态函数也属于正态分布，因此可用中心点法（MFOSM）求解可靠指标及失效概率，它既简单又具有足够的精度。
    12  Analysis of Radial Forces on the Seal Block in a Compound Gear Pump with 3 Idle Gears
    ZHAO Lian chun ,  XU Xian liang ,  SUN Chang jing
    2001, 24(6):45-47. DOI: 10.11835/j.issn.1000-582X.2001.06.012
    [Abstract](709) [HTML](0) [PDF 197.72 K](196)
    Abstract:
    By analyzing the pressure distribution between gears and sealing blocks in compound gear pump with three idlers,the resultant hydraulic forces acting on seal blocks are obtained.The conclusion is the unbalanced resultant hydraulic forces are relatively small in magnitude.In the pump,the inner sealing edges are long and so it s Sealing effect is good,but the outer sealing effect is relatively poor because of its short sealing edges.The little unbalanced force pushes the sealing block to te pumping chamber,therefore it is advantageous to meliorating the pump's sealing effect,thereby to improving it's volumetric efficiency as well.
    13  Beamforming Technique of the Multi-aircrafts Management System
    FENG Wen jiang ,  YANG Shi zhong
    2001, 24(6):48-51. DOI: 10.11835/j.issn.1000-582X.2001.06.013
    [Abstract](670) [HTML](0) [PDF 239.69 K](198)
    Abstract:
    Under the operation mode of the multi-aircrafts , more aircrafts at the same time in the view area of one TT&C station. Obviously, it is unable to manage them for traditional methods. This paper proposes a new technique, which combines SDMA with spread spectrum CDMA. In SDMA, multi-beamforming is available by parallel data processing and one aircraft is tracked by one beam. Finally, simulation results of digital beamforming are provided.
    14  Inteligent Agricultural Information Network and Service System
    HE Li qing ,  HUANG Xi yue ,  CHAI Yi ,  TU Yun hua ,  WANG Dong hui
    2001, 24(6):52. DOI: 10.11835/j.issn.1000-582X.2001.06.014
    [Abstract](718) [HTML](0) [PDF 422.69 K](334)
    Abstract:
    The scheme and practice for construct of intelligent agricultural information network are descibed . With Internet form, we set up the computer network of Intelligent Information Technology of Agriculture in Demonstration Section of Chongqing, discussed the design method of expert system in agriculture, and studied 5 expert systems based on vegetable growth, such as tomato and so on. Some software modules are studied, such as the soil information systems on the network, expert system in the vegetable plant diseases and insect pests diagnostician and network on line selling and so on. The structure,function and work flow of information service system based network are introduced.
    15  Reliability Analysis of Human-Machine System in Continuous Industry
    MA Xiao xiao ,  HUANG Xi yue ,  HUANG Min ,  NI Lin
    2001, 24(6):56-59. DOI: 10.11835/j.issn.1000-582X.2001.06.015
    [Abstract](718) [HTML](0) [PDF 330.27 K](1547)
    Abstract:
    As the research objective changing from a small simple system to a large complex one, traditional reliability theory can not adapt to the requirement of the great transformation. Based on the specialty of continuous process industry, the necessity and urgency to study the reliability of this kind of system is stated out. The research structural model of the reliability of complex continuous industries is presented also which involved in the reliability of human, network, software and devices.
    16  Research on IN/Internet Interworking Based on Virtual Switch
    WANG Tian ,  CAO Chang xiu ,  WANG Ji feng
    2001, 24(6):60-63. DOI: 10.11835/j.issn.1000-582X.2001.06.016
    [Abstract](461) [HTML](0) [PDF 330.00 K](939)
    Abstract:
    A scheme of virtual switch based on the idea of softswitch is proposed to realize IN/Internet interworking,after analyzing the interface of IN/Internet interworking.Then the logic entities,signal functions,construction frame and services characteristics of virtual switch are presented in detail.Moreover as cited examples,virtual SSP and virtual SCP are constructed by virtual switch to realize IN/Internt interworking.
    17  Alarm of Blight in the Process of Vegetables Cultivaticn on the Bases of Rough Sets Theory
    YI Zheng jun ,  HUANG Han ming ,  HUANG Xi yue
    2001, 24(6):64-66. DOI: 10.11835/j.issn.1000-582X.2001.06.017
    [Abstract](526) [HTML](0) [PDF 237.69 K](662)
    Abstract:
    This essay applies rough sets theory into the alarm of blight in the process of cultivation of vegetables. One kind of the simplest knowledge extraction rules can be constructed, so that the quickest information fusion algorithms. can be got and thus a optimized alarm for the prevention of blight in vegetable cultivation is provided. This bears great significance to the spread of planting knowledge, the production of green vegetables, high yield and bumper harvest, and stabilizing the market.
    18  Improved Fuzzy Algorithm for Excavator''''s Elevating Controlling System
    HAN Li ,  YI Jiang neng ,  ZHOU Xiao feng
    2001, 24(6):67-70. DOI: 10.11835/j.issn.1000-582X.2001.06.018
    [Abstract](469) [HTML](0) [PDF 362.47 K](876)
    Abstract:
    In order to reduce the faults and enormous economic losses of mining excavator's elevating controlling system,the research of the system's fault diagnostic methods is very valuable. Based on functional fault description and fault arrangement, a new method is offered for the complicated controlling system . The improved fuzzy algorithm of the controlling fields is introduced into the fault diagnostic fields. A improved fuzzy diagnostic model for the voltage's minus-feedback circuit of WK-4 excavator's elevating controlling system is built up and compared in detail with the traditional fuzzy diagnostic model. The results show the effectiveness and advantage of the improved fuzzy diagnostic model. The method proposed can be widely applied to fault diagnosis of mining excavator's various controlling systems.
    19  Fault Diagnosis in Hydraulic Turbine Governor Based on BP Artificial Neural Network
    YU Xiao hui ,  DU Lin ,  CHEN Ming ying ,  CAI Hong ,  LIAO Rui jing
    2001, 24(6):71-74. DOI: 10.11835/j.issn.1000-582X.2001.06.019
    [Abstract](477) [HTML](0) [PDF 316.33 K](1065)
    Abstract:
    The governing system of hydraulic turbine generator plays an important role in power system. It is significant to find out the faults of governing system and remove them quickly. This paper sets up a new fault diagnosis model of the hydraulic turbine generator governing system with the advanced ANN (artificial neural net). This 17-in-13-out model consists of three layers. It is proved that this model can find the fault accurately.
    20  Properties of Temperature Difference Self-power Adjusting Valve Used in Blast Furnace
    ZOU De yu ,  HE Sheng ping ,  WU Cheng bo ,  CHEN Deng fu ,  ZHOU Nan fu
    2001, 24(6):75-77. DOI: 10.11835/j.issn.1000-582X.2001.06.020
    [Abstract](668) [HTML](0) [PDF 226.42 K](833)
    Abstract:
    Blast furnace campaign life has a great effect on technical and economical indexes of ironmaking production. Cooling condition and life-span of cooling apparatus have a great influence on campaign life of blast furnace. Owing to constant flux water supply used for blast furnace cooling at present, cooling intensity doesn't meet the demand of heat load in peak value, concurrently, cooling water supply lacks equilibrium and stability, which will cause burnout of cooling apparatus and diminution of blast furnace campaign life. So temperature difference self-power adjusting valve is introduced to make BF cooling apparatus change constant flux water supply mode to constant temperature difference water supply mode in order to satisfy the need of cooling intensity when heat load wis in peak value.Principle, structure ,properties and function of temperature difference self-power adjusting valve are explained. The flux in different temperature is measured.
    21  Effect of Vanadium Content on VC Precipitation in PD3 Steel
    LIU Tian mo ,  ZHOU Shou ze ,  ZUO Ru lin ,  MEI Dong sheng ,  DENG Jian hui
    2001, 24(6):78-81. DOI: 10.11835/j.issn.1000-582X.2001.06.021
    [Abstract](840) [HTML](0) [PDF 328.92 K](1152)
    Abstract:
    In order to identify the affect of vanadium in pearlite transformation and the regularity of the precipitation, the effect of vanadium content on VC precipitation in PD3 steel has been studied by electrochemical extraction and TEM. The results show that the solid solubility limit of vanadium in the ferrite and Fe 3C is 0.09% and 0.23% respectively, that vanadium exist mainly as solid solution and a few VC particles are precipitated in disordered way in case of the vanadium content being below 0.21%, that VC particles are precipitated in excess of saturated solubility, and that a lot of VC particles are precipitated in disordered and "interphase precipitated" way in case of the vanadium content being above 0.21% and arrive at 0.33%.
    22  Optimization and Treatment on Electrolyze Aluminum Anode Carbon Lump
    JIANG Han_xiang ,  ZHU Zi_zong ,  CHEN Peng_ju
    2001, 24(6):82-84. DOI: 10.11835/j.issn.1000-582X.2001.06.022
    [Abstract](586) [HTML](0) [PDF 208.86 K](1115)
    Abstract:
    阳极炭块优化处理的目的是降低炭块孔隙率，提高其抗氧化性能，降低极消耗；提高阳极炭块的导电率，降低电耗，提高经济效益和改善环境质量。溶液浸渍处理法：阳极炭块先用AlCl3溶液浸渍，再用氨水浸渍，然后在950℃进行焙烧处理。研究表明：影响阳极炭块优化处理质量的主要因素是焙烧时间、溶液浓度和浸渍时间。采用AⅡBⅡCⅢ条件优化处理的阳极炭块与空白阳极炭块相比，填充率达到19．06％，电阻率降低幅度高达34．24％。
    23  Pretreatment of Coke Oven Waste Water with Blast Furnace Sludge Method and Blast Furnace Sludge Plus Scrap Iron Method
    TANG Guang_lin ,  XU Chu_shao ,  DONG Ling_yan ,  CHEN Jian kai ,  BI Min
    2001, 24(6):85-87. DOI: 10.11835/j.issn.1000-582X.2001.06.023
    [Abstract](684) [HTML](0) [PDF 239.69 K](1213)
    Abstract:
    Coke oven waste water is respectively pretreated by blast furnace sludge method and blast furnace sludge plus iron scrap method, the effects of pH and the quantity of materials and treatment time on the removal efficiency of COD are analyzed. The results indicate that blast furnace sludge plus iron scrap method is superior to blast furnace sludge method .The treatment time and pH can greatly affect on the removal efficiency of COD using blast furnace sludge plus iron scrap method. The treatment time after 30 minutes and pH have no remarkable effects the removal efficiency of COD using blast furnace sludge method. The removal efficiency of COD increases with the increase of blast furnace sludge and iron scrap, but the increase rate decreases gradually.
    24  Dtermination of The Suppression Faction of Chen''''s Model in Flow Boiling
    ZHOU Jie ,  XIN Ming_dao
    2001, 24(6):88-91. DOI: 10.11835/j.issn.1000-582X.2001.06.024
    [Abstract](772) [HTML](0) [PDF 299.49 K](1328)
    Abstract:
    In present paper, the suppression factor of Chen's model is determined, based on the force and heat balance on a vapour bubble and Clausius-Clapeyron equation, the active nucleate cavity size of flow boiling surface and its disperse characteristic. Furthermore, the correlation is attained using Chen' model and the present suppression factor from the experimental data of R134a and R22 for a smooth tube. The correlation agrees well with the experimental data. It demonstrates the present suppression factor is able to promote the accurate which predicts the heat transfer coefficient of flow boiling in Chen's model.
    25  EMH of Stock Market by the Method of R/S
    RAN Mao sheng ,  ZHANG Zong yi ,  CHEN Rong
    2001, 24(6):92-95. DOI: 10.11835/j.issn.1000-582X.2001.06.025
    [Abstract](762) [HTML](0) [PDF 292.35 K](255)
    Abstract:
    First,we comment on the theory of stock market validity of China. Basing on the analysis of the actuality of stock market validity of China, the market validity by R/S method empirically is studied also, and the conclusion is given that china's stock market is in vice-effective.
    26  Game Analysis on the Efficiency of Chinese Security Market
    LIU Xing ,  WANG Xiao long ,  ZHANG Guo lin
    2001, 24(6):97-99. DOI: 10.11835/j.issn.1000-582X.2001.06.026
    [Abstract](546) [HTML](0) [PDF 265.84 K](336)
    Abstract:
    According to earnings information of annuals and grade regulation,50 low_grade and 50 high_grade Chinese listed corporation are chosen,through building model and calculating the excess yield.This article educes demonstration result,which is analyzed by game theory.
    27  Power Spectrum Verification of Shenzhen Share Price Index
    MENG Wei dong ,  WANG Zong li ,  XIONG Hu
    2001, 24(6):100-103. DOI: 10.11835/j.issn.1000-582X.2001.06.027
    [Abstract](713) [HTML](0) [PDF 274.72 K](231)
    Abstract:
    The non tendency processing has ben gone on to share price index,afterwards the power spectrum of share price index processed by non tendency method has been verified in order to calculate the correlation dimension and Lyapunov exponent later,and then forecast and study stock market effectively.
    28  Stochastic Evolution System under Perturbations of Unbounded Operators
    HUANG Wei
    2001, 24(6):104-107. DOI: 10.11835/j.issn.1000-582X.2001.06.028
    [Abstract](700) [HTML](0) [PDF 268.63 K](194)
    Abstract:
    柱布朗运动是布朗运动在无穷维空间上的一种重要实现。考虑一类实可分Hilbert空间上被无界算子扰动的关于柱布朗运动的随机发展系统的稳定性问题。运用线性算子半群理论给出了分别使得此系统稳定、使其L^2－连续发展解指数稳定及使其发展解指数稳定的状态反馈控制律，且稳定关于无界扰动算子族是一致的。
    29  Development of Movement Control System of Shoe Leather Lumen CT Instrument
    YE Jun yong ,  WANG Tong qing ,  YANG Bo ,  PENG Jian ,  XIAN Wu
    2001, 24(6):108-112123. DOI: 10.11835/j.issn.1000-582X.2001.06.029
    [Abstract](598) [HTML](0) [PDF 449.20 K](216)
    Abstract:
    A method of solving the problem of shoe leather lumen measurement in shoe CAD/CAM by industrial CT technology is introduced,X ray industrial CT technology is studied. The paper gives a rational scheme of system dispose. This scheme can be not only meet the need of shoe leather lumen measurement, but also achieve ordinary measurement. An uncomplicated and practicable movement control system are proposed also. This scheme achieves high precision of movement position without expensive direct current servo-control. A new simple method measurement is developed and accurate control of position in movement of detector data insert is achieved. The image resolving power can meet shoe leather lumen measurement.
    30  Application and Prospect of Computer-Aided Engineering
    LIU Jian hua ,  GUO Gang ,  XU Zong jun ,  JIAN Kai lin ,  ZHANG Li
    2001, 24(6):113-116. DOI: 10.11835/j.issn.1000-582X.2001.06.030
    [Abstract](609) [HTML](0) [PDF 350.98 K](235)
    Abstract:
    This article concentrates mostly on the dependence between CAE and CAT, and that of CAE and theoretical research, on the base of analyzing the features of today's mainstream software on CAE. It points out the organizational structure and the trend of development on CAE. At last, this article puts forward the development of CAE is a long and systematical engineering.
    31  Density Functional Theory Compute on Electronegativities to Superconductivity of Oxides
    HONG Quan
    2001, 24(6):117-119. DOI: 10.11835/j.issn.1000-582X.2001.06.031
    [Abstract](627) [HTML](0) [PDF 235.64 K](213)
    Abstract:
    In this article we have worked out the correlation between electronegativity and high temperature superconductivity for oxide. It is suggested the equalized electronegativity, X cq , can be used as a empirical criterion for superconductivities of oxides. For determining the X cq , a new formula for the calculation of X cq values has been obtained The X cq values of 230 oxide superconductors have been calculated. The result shows that the X cq values of all the oxide superconductors concentrate in a narrow range from 5.00 to 5.63 and that the oxides with values out side this region would be non-superconductive. This criterion can be applied to almost all the oxide superconductors. It is clearly that this result is able to benefit further inquiries about the mechanism of superconductivity.
    32  Component Object Programming and Component Standard
    YANG Xiao hong ,  ZHU Qing sheng
    2001, 24(6):120-123. DOI: 10.11835/j.issn.1000-582X.2001.06.032
    [Abstract](939) [HTML](0) [PDF 323.40 K](206)
    Abstract:
    With the development of software technology, especially for the requirment of distributing computing, Component Object Programming has been developed very quickly. This technique allows any two component to cmmunicate between different courses, different computer, different computer language and different operating system. Component Object Model(COM)is a network standard set up by Microsoft. COM is a recognized standard too. This paper starts with analyzing traditional methods of software development, and introduces the idea of Component Object Programming and component standard.
    33  A Kind of Synthetical Fuzzy Control System of Carburization
    HUANG Min ,  HUANG Xi yue ,  CHEN Fang
    2001, 24(6):124-126130. DOI: 10.11835/j.issn.1000-582X.2001.06.033
    [Abstract](765) [HTML](0) [PDF 271.92 K](191)
    Abstract:
    Carburization is a complex manufacturing process with serious disturbance and time delay,which is multi-variable and uncertain.It is difficult to set up an exact mathematic model.Moreover,by means of conventional control methods and experience,satisfying control result can't be obtained.In this paper,according to the characteristic of controlled-object,Fuzzy control method has been chosen to design a Fuzzy-PI controller and a mixed-PID Fuzzy controller.The result of simulation shows that the robust performance and control result of the new Fuzzy controllers is better than the conventional PID controller.The overshoot is smaller.It is helpful to improve the quality of carburizing workpieces.
    34  The Optimal Method of Calculation of Earthwork Volume of Transformer Substation
    LIU Lin ,  YU Ji hui
    2001, 24(6):127-130. DOI: 10.11835/j.issn.1000-582X.2001.06.034
    [Abstract](760) [HTML](0) [PDF 279.87 K](246)
    Abstract:
    With the development of electric power industry, more and more projects of building transformer substation need a great deal of fund. More exact evalution of projects becomes more important.In evalution of projects, calculation of earthwork volume may be a very important part.According to the requirement of most projects and on the basis of traditional method , we have created a new method of optimal calculating earthwork and auto-balance. Minute-dividing technology and interpolating way are used to enhance the simulation of Grids.The new method can better simulate the landform and more effectively promote the precision and speed of calculation of earthwork .Auto-Balance can do what can't be reached by manual work.
    35  Harm of Offgas from Wastewater Treatment Facilities and Its Controlling
    LUO Gu yuan ,  SUN Yong li ,  JI Fang ying ,  XU Xiao yi ,  LUO Ning
    2001, 24(6):131-133145. DOI: 10.11835/j.issn.1000-582X.2001.06.035
    [Abstract](725) [HTML](0) [PDF 350.56 K](1240)
    Abstract:
    Offgas problem of wastewater treatment systems is becoming an increasing problem, as the public's living standard and awareness of environmental issues increases. This article puts forward the necessity of cleaning the offgas from wastewater treatment facility, introduces the harms of odorous portion of offgas to public and concrete construction, brings forward the main object of offgas emitted from wastewater treatment plant. The way of restraining the generation and escaping of gases, the containment structure of facilities and decontaminate of offgas after it emit, and the virtues and shortcomings of each method are discussed in this article to give advices for the selection of controlling ways.
    36  State and Prospects of Diesel Engine Fault Diagnosis Technique
    CAO Long han ,  CAO Chang xiu ,  SUN Ying kai ,  JING You quan ,  GUO Zhen
    2001, 24(6):134-138. DOI: 10.11835/j.issn.1000-582X.2001.06.036
    [Abstract](991) [HTML](0) [PDF 528.57 K](2350)
    Abstract:
    As a kind of complex power machinery, diesel engine is being paid more and more attention to its condition monitoring and fault diagnosis technology. In the fault diagnosis field of diesel engine, the technique of signal process, character abstraction and identification method have formed a system, but there is a certain distance away from practical. This paper analyzes the common faults and influencing factor of diesel engine. The principle, characteristic and disadvantage of modern fault diagnosis technology, such as various time-frequency methods based on vibration signal, speed fluctuation method, iron content and spectrometry, grey system theoretical diagnosis method, artificial neural network and expert system fault diagnosis method, were reviewed. The difficulties and the development direction of diesel engine fault diagnosis were put forward in the end.
    37  Research Status of Dyeing Wastewater Treatment
    HUANG Chuan ,  LIU Yuan yuan ,  LUO Yu ,  LOU Xiao peng
    2001, 24(6):139-142. DOI: 10.11835/j.issn.1000-582X.2001.06.037
    [Abstract](1100) [HTML](0) [PDF 337.22 K](1736)
    Abstract:
    Wastewater of dyeing industry has complicated constituents, and usually contains many kinds of dyes. It has deep tinct and strong toxicity, and it is difficult to decompose it. Its pH value fluctuates widely, and it has high concentration and large water quantity.The development status of the dyeing wastewater treatment inside and outside China is introduced, and the physics method, chemical method, physical chemistry method and biological method are stated in detail. The applicable conditions and treating effect of the four methods are listed and the advantages and disadvantages are concluded.
    38  Technology for Synthesis of Polymeric Aluminum Chloride Utilize Waste Alfoil
    GAN Meng yu ,  MA Li
    2001, 24(6):143-145. DOI: 10.11835/j.issn.1000-582X.2001.06.038
    [Abstract](531) [HTML](0) [PDF 183.71 K](1441)
    Abstract:
    The technology for synthesis of polymeric aluminum chloride (PAC)utilizing waste alfoil is presented, the factors affecting the property of PAC such as the ratio of alfoil to hydrochloric acid to water, the reaction temperature, ripening time and the sequence of feed in raw materials are discussed, and the technology conditions of prepare PAC are determined. The technological process is simple, and the product qualities accord with the demands of GB15892-95.

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