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Volume 20,Issue 1,1997 Table of Contents

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    • 1  The Experimental Study of Lubrication Mechanism of Double Enveloping Hourglass Worm Gearing
    He HuinongWei YunlongZhou YinshengFu LianhuaQuan Yongxin
    1997, 20(1):1-6.
    [Abstract](403) [HTML](0) [PDF 302.56 K](1010)
    Abstract:
    According to the characteristic of contact and lubrication of double enveloping hourglass worm gearing,a simplified contact model that can simulate the lubrication mechanism of coupling effect of squeezing effect and entraining effect of this worm gearing is presented.A simulating test set is designed.The lubrication mechanism of coupling effect of squeezing effect and entraining effect is studied experimently by using this set.And the influences of rotation speed,loading speed and depth of oil pocket on the forming of lubrication film and loading ability between contact surfaces are analyzed.Some beneficial conclusions are obtained.
    2  Some Problems about the Implementation of One dimensional Mallat Algorithm
    Xu Mintao Qin Shuren Chen Zhikui Yang Changqi
    1997, 20(1):7-13.
    [Abstract](553) [HTML](0) [PDF 226.67 K](810)
    Abstract:
    详细地研究了ｍ阶尺度函数，特别是Ｅ＾（Ｎ）ｍ，ｎ（ｔ）和信号的采样，零阶保持逼近。导出了信号初始近谱的计算方法。对信号的一维Ｍａｌｌａｔ算法的实施作了系统的讨论。
    3  A Three Valued Model of System Level Fault Diagnosis
    Yang Xiaofan He Zhongshi Chen Tinghuai
    1997, 20(1):14-20.
    [Abstract](551) [HTML](0) [PDF 280.51 K](841)
    Abstract:
    We propose a three valued model of system level fault diagonsis,define a class of diagnosable systems,give a characterization of them,and study their optimal design.
    4  Optimal Design of Aerostatic Bearing
    Chen Haibin Zhong Xianxin Cheng Xuemei
    1997, 20(1):21-26.
    [Abstract](576) [HTML](0) [PDF 238.47 K](1641)
    Abstract:
    A method using fuzzy sets theory and optimization method in designing aerostatic bearings has been presented,which has solved the multiobjective optimal designing problems of aerostatic bearings and has obtained rational structure parameters,raised the efficiency of designing.The automation of aerostatic bearing design has been realized.
    5  The Characteristics of Fiber Grating
    Jiang Yi Chen Weimin Huang Shanglian
    1997, 20(1):27-30.
    [Abstract](534) [HTML](0) [PDF 156.25 K](132)
    Abstract:
    Based on the mode coupling theory,the characteristics of fiber grating are analysed.The analogized charateristic curves are obtained which may take as a theoretical guide for making and using fiber grating.
    6  The Ultrafine Physical Structure Characteristics of Coal
    Xu Longjun Zhang Daijun Xian Xuefu
    1997, 20(1):31-37.
    [Abstract](565) [HTML](0) [PDF 398.76 K](108)
    Abstract:
    The amorphous structure characteristics of coal and their variation regularity are discussed.The pore structure features and models of coal have been reviewed in detail.
    7  Application of Matter Element Analysis in Assessment of Ambient Air Quality
    Lin Yan Gu Hengyue Sun Yang
    1997, 20(1):38-42.
    [Abstract](605) [HTML](0) [PDF 165.19 K](137)
    Abstract:
    A new method for assessment of ambient air quality is proposed by using matter element analysis.This model is simple and reasonable in assessment.The practical example is given,and compared with other methods.
    8  Dynamic Heat Transfer Models for Orthogonal Dry Cutting
    Kang Gewen Liu Fei Xu Zongjun Tong Qinmin
    1997, 20(1):43-49.
    [Abstract](507) [HTML](0) [PDF 240.20 K](101)
    Abstract:
    The models for dynamic heat transfer of chips and tools are developed based on analysing heat source distributions in orthogonal dry cutting process,and a procedure is proposed to compute the temperature distributions of chips and tools,and the heat partition coefficients between the tools and the chips.
    9  Nonlinearity in Torsional Oscillation of Three String Pendulum
    Xiang Yuming
    1997, 20(1):50-54.
    [Abstract](733) [HTML](0) [PDF 190.97 K](156)
    Abstract:
    The differnetial equation for three string pendulum in torsional oscillation is derived.Its nonlinear characters are studied.Exact solutions for the torsional oscillation equation and period are given.Influences of parameters (amptitude,length of string and diameter of disk) on period are discussed.Truncation of series expansion for exact solution reduces to the approximate solution.
    10  Power Flow Analysis of System with UPFC
    Luo ChunleiSun HongboXu GuoyuLi ShuangWang Jinggang
    1997, 20(1):55-59.
    [Abstract](629) [HTML](0) [PDF 222.37 K](88)
    Abstract:
    This paper first analyzes the working mechanism of the UPFC,and a practical method of power flow simulation is presented.The method can bring controlling of UPFC to accord with power flow simulation in the best,and can calculate the power flow with several UPFC.IEEE 5 nodes system and IEEE 30 nodes system are tested.
    11  Application of Fuzzy Variable StructureControl in Generator Excitation System
    Gao Feng Zhang Li
    1997, 20(1):60-65.
    [Abstract](557) [HTML](0) [PDF 261.65 K](108)
    Abstract:
    In order to solve the problem of the high frequency shiver,a novel fuzzy variable structure control approach is presented by combining the fuzzy control with the variable structure.The proposed approach is successfully applied to the generator excitation control.The digital simulation results show that the proposed approach is very effective.
    12  The Thermodynamic Analysis and Optimization of the Flow and Heat Transfer Process across the Wedge Shaped Structure
    Wu Shuangying Li Yourong
    1997, 20(1):66-71.
    [Abstract](640) [HTML](0) [PDF 253.53 K](122)
    Abstract:
    从热力学第一定律及第二定律出发，分析绕楔形体的流动为层流量，其流动与传热过程的熵产，从而建立流动与传热过程的熵产率关系式，并引入无因次熵产数以讨论楔角，特征长度以及雷诺数对流动与传热性能的影响，找出其优化的过程参数。
    13  Mechanism of Multipeaks Feature forVanadium titanium containing Magnetite in Smelting Reduction
    Liu Qingcai
    1997, 20(1):72-75.
    [Abstract](544) [HTML](0) [PDF 221.82 K](115)
    Abstract:
    The mechanism of multipeaks of reduction rate for vanadium titanium containing magnetite in the process of smelting reduction has been studied.The structure feature of vanadium titanium containing magnetite and changing character of slag structure as well as the kinetic feature of vanadium titanium containing magnetite in smelting reduction process were also analysed in this paper.
    14  Deep Drawing of Complicate Parts by Hydroforming
    He Dajun Wang Min Yang Tezhi
    1997, 20(1):76-81.
    [Abstract](603) [HTML](0) [PDF 232.33 K](106)
    Abstract:
    The process of deep drawing of complicate parts using hydroforming is described.The mechanical analysis and how to improve the forming quality are also discussed.
    15  Study on the Development of Wavelet Theory by Analysing References of Wavelet
    Li Jianping Chen Tinghuai Xu Wenzi Zhang Wanping
    1997, 20(1):82-87.
    [Abstract](569) [HTML](0) [PDF 279.62 K](1178)
    Abstract:
    By CD ROM and Internet Service System,lots of references on wavelet are searched.These references are analysed in the paper,a new viewpoint is put forward by the authors.Recent studies by the authors on wavelets are also introduced.
    16  Study on Nonlinear Dynamical Method for EEG Signal Processing
    Pan Jun Zhou Shouchang Huang Shanglian
    1997, 20(1):88-91.
    [Abstract](695) [HTML](0) [PDF 221.61 K](1310)
    Abstract:
    After studying the meaning of EEG signal processing using systems theory,the basic difficulties of the research on the EEG system and signal analysis are given,showing that it is hard to build model of the EEG system and signal.Hence,we introuduce the method of reconstructing the attractor in state spaces.Through the analysis of some experiments,the meaning of the presented method has been discussed.
    17  A Study on the Practical Algorithm for One Dimensional Equal Stock Cutting Problem
    Gong Jian Liu Fei Xu Zhongjun
    1997, 20(1):92-97.
    [Abstract](676) [HTML](0) [PDF 242.62 K](1177)
    Abstract:
    Based on alalysing the mathematical models for one dimensional equal stock cutting problem,a knapsack column generation algorithm has been constructed,which is a successive approximate algorithm for the practical engineering.In the end of this paper,some computational examples have been presented,which show that the convergence and optimum results of the algorithm are quite good.
    18  Optimization of Structure Parameters for Self Recirculation Burner
    Liu Chengquan Wen Liangying Chen Min
    1997, 20(1):98-103.
    [Abstract](518) [HTML](0) [PDF 124.70 K](1007)
    Abstract:
    In the paper,the relationship between the structure parameters and P V characteristics and recirculation ratio of the burner are studied by the simulated experiment of a self recirculation burner.The optimum structure parameters of the burner are analysed and tested in the cases that the produced recirculation amaunt of optimal controlled NO x consumpting the lowest energy can be ensured.
    19  Study on Modeling for Pretreatment and Cyclic Control Stream
    Peng Donglin Dai Zhengyuan Zheng Lianqin
    1997, 20(1):104-108.
    [Abstract](330) [HTML](0) [PDF 270.67 K](926)
    Abstract:
    The characteristics of pretreatment and cyclic control stream are analysed:the form of cyclic embedded hardware circuit,the idea for designing the pretreatment program.The chart model of the system is established preliminarily.
    20  A Kinetic Model of Saccharification Reaction Enzyme catalysed in Corn Starch
    Liu Sheji Tan Huiling
    1997, 20(1):109-111.
    [Abstract](512) [HTML](0) [PDF 133.71 K](1208)
    Abstract:
    The results of this paper show that a three state enzyme catalysis model can fit the saccharifying of corn starch by diastase.In addition,this reaction has characteristics of single substrate reaction kinetics.Experimental data are better accordant with the results calculated by the model.
    21  A DSS Based on Using the Fuzzy Comprehensive Evaluation Model for Selecting Distinguished Persons
    Du Xiaoping Bai Qinghua
    1997, 20(1):112-116.
    [Abstract](524) [HTML](0) [PDF 202.21 K](1866)
    Abstract:
    The Decision Supporting System(DSS) is used to the selection of the qualified personnel in this paper.The fuzzy comprehensive evaluation method is applied to evaluate the gualification of the teaching and research staffs in colleges and universities,and also to analyze the appraise of the evaluating experts.The results,which are useful to the consultation of the leaders,are obtained.
    22  Design and Implementation of System Platform for Client/Server
    Zhang Jinchuan Li Hua
    1997, 20(1):117-120.
    [Abstract](546) [HTML](0) [PDF 236.10 K](1010)
    Abstract:
    The paper presents the systematical structure with client/server taking the information management system of Chongqing Science and Technology Commitee background.Discuss the design and implementation of the system platform wth client/server based on Novell Local Area Network (LAN) and Sybase Database Management System(DBMS).

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