Volume 19,Issue 4,1996 Table of Contents

Lu Yiyin

1996, 19(4):1-5.

[Abstract](560) [HTML](0) [PDF 220.05 K](116)

Abstract:
In the paper,a new worm gearing,Ball worm gearing is presented,initiative discussion of its theory of the gearing and design have been done, made a junior advanced development.

2 An Elastic Steady State Security Region with Stochastic and Fuzzy Loads

Xie Yougsheng , Sun Hongbo , LuoChunlei , Xu Guoyu

1996, 19(4):11-15.

[Abstract](637) [HTML](0) [PDF 225.15 K](726)

Abstract:
Load uncertainty in power system is regarded as stochastic variable or fuzzy number in this paper. The concept of possibility-probability consistency is used to transform fuzzy number to stochastic variable. And the concept of confidence nitervals is used to calculate steadystate security regions under various load confidence levels. So,steady-state security regions are elastic. At last,a compunctional result about IEEE-30 system is given.

3 A Fault Location Algorithm for Transmission Lines in Circle Network

Han Yongguo , Zhong Minxiu

1996, 19(4):16-20.

[Abstract](485) [HTML](0) [PDF 168.10 K](811)

Abstract:
A fault location algorithm for transmission lines in circle network is presented.The algorithm uses local data. Its location accuracy is independent of power # flow, transient resistance and variation of remote system impedance. Simulation results are satisfactory.

4 Shunt Active Power Filiter for Harmonic Compensation in DC Side of HVDC Transmission System

Wen Cao , Wang Guanjie , Ren Zhen , Tang Zhuoyao

1996, 19(4):21-25.

[Abstract](578) [HTML](0) [PDF 235.24 K](828)

Abstract:
A shunt active power filiter(APF) used for harmonic treatment isintroduced in this paper. Basic circuit-theory and main configuration are analyzed. Control scheme and its realization are discussed. Computer simulation is used to verity theoretical analysis. It shows that APF is an interesting alternative for hasmonic treatment compared with conventional passive filter.

5 The Software Implementation of Neural Network Fuzzy Inference Cooperation System

Zou Xiaojia , Zang Anbang , ZouJiaqi

1996, 19(4):26-30.

[Abstract](502) [HTML](0) [PDF 295.27 K](965)

Abstract:
This poper sets up a new Neural Network Fuzzy inference Cooperation system which is based on fuzzy inference principle in Expert Systems,take advantage of the powerful learning function, the little sensitivity to input layer's samples,and the fast convergence and so on in FCBP and take advantage of the good sort property and good suit property to fuzzy value in MFART Network.

6 A kind of Expert Control Combined with the Supervisory Theory for Discrete Event Dynamic Systems

Lin Chen , Li Zushu

1996, 19(4):31-36.

[Abstract](430) [HTML](0) [PDF 252.90 K](748)

Abstract:
To overcome the shortages of the supervisory theory for Discrete Event Dynamic Systems,a kind of expert control combined with the supervisory theory is proposed,also a practical example is given to illustrate its effectiveness.

7 The Security Strategy and Security Controls and Techniques for the Enterprise Management Information System

Zeng Yi

1996, 19(4):37-43.

[Abstract](660) [HTML](0) [PDF 340.41 K](1087)

Abstract:
This paper attempts to present the security strategy and the security control and its implementation via the hierarchy of securitics used in an enterprise management information system based on unix and oracle. It describes the useful and critical techniques applied to every level of the hierarchy of securities,espcially the security control mechanism built in the applications. It also stresses and explains the impohance of the safety education and management.

8 Fuzzy Graphic Matroids

Wu Deyin

1996, 19(4):44-48.

[Abstract](759) [HTML](0) [PDF 194.96 K](902)

Abstract:
First,in this paper, the fuzzy cycle matroids are constructed from fuzzy graphs and their properties are discussed;Then,the fuzzy isomorphism of fuzzy matroids is defined. On the basis of a careful discussion of the fuzzy inomorphic properties,we generalize fuzzy cycle matroids to define fuzzy graphic matroids; At last, with the help of a good-cycle concept of fuzzy cycle matroids,a necessary and sufficient condition for a fuzzy matrids to be a fuzzy graphic matroids is given.

9 Wavelet Analysis Methods to the Signals with Infinite Energy

Zhang Shiqing , Liu Quan

1996, 19(4):53-59.

[Abstract](585) [HTML](0) [PDF 282.08 K](1068)

Abstract:
We study the spectrum analysis to the signals with infinite energy using continuous wavelet transform,the concept of time-frequency power spectrum is presented,and the relations between the time-frequency power spectrum and classical power and average power are studied,the wavelet transform of self-correlation function is also presented, and the relations between it and time-frequency power spectrum are also studied.

10 Existence Theorem of Upper Bound Constant of Multiplier for ELSP and An Improved Algorithm

Xiong Zhongkai , R.C.Leachman

1996, 19(4):60-65.

[Abstract](636) [HTML](0) [PDF 215.74 K](917)

Abstract:
In this paper we prove existence theorem of upper bound constant of multiplier for ELSP and propose an easily programmable algorithm for solving the problem of determining lot size for n items to be produced on a single machine based on the existence theorem. We give some interesting examples to show the bound constant is useful. In some cases we can find optimal solution immediately with the bound constant and it is difficult to find a feasible solution without this bound constant.

11 Numerical Simulation of Temperature Field during the Dissolution-Diffusion Bonding Process to Mending Iron Casting Defects

Cheng Xinming , Qian Hancheng

1996, 19(4):71-76.

[Abstract](631) [HTML](0) [PDF 296.49 K](111)

Abstract:
The common finite element method microcomputer software for simulation of the temperature field is developed by authors. It is used for calculating the temperature field duringthe mending process of iron casting defects by means of the dissolution-diffusion bonding technology. The correctness has been proved by testing results. This software has been used to analyse thecaused of hardness rising in heat effecting zone,and also find out the approach for solving the problem.

12 The Study on Heat Transfer Through Flux Film in the Continuous Casting Mold

Zhang Ping , Wei Qingchen , Hu Jianjun

1996, 19(4):77-81.

[Abstract](491) [HTML](0) [PDF 247.47 K](89)

Abstract:
用自制的一台模拟试验装置研究了连铸结晶器中渣膜的热传导行为。测定了结晶器与凝固坯壳之间渣膜的有效导热系数及界面的接触热阻；高温下渣膜的有效导热系数大致为４￣５Ｗ·ｍ＾－１·Ｋ＾－１，结晶器与渣膜层界面存在的热阻相当于９４￣１４９μｍ的空气间隙。

13 The Study on Smelting Ti-Si Ferroalloy by DC Electrothermal Process Using PISC Blast Furnace Titaniferous Slag

Li Zushu , Xu Chushao , Li Zaimiao , Zhou Youquan

1996, 19(4):82-86.

[Abstract](803) [HTML](0) [PDF 257.52 K](142)

Abstract:
The new process for semiting Ti-Si ferroalloy using Panzhihua Iron & Steel Company (PISC) blast furnace titaniferous slag is introduced. The reduction and impoverishment law of TiO2 in slag and the effects of DC on smelting Ti-Si ferroalloy are studied when smelting Ti-Si ferroalloy by electrosilicothermal method,Ti-Si ferroalloy containing about 20% Ti can be produced by electrosilicothermal method. and Ti recovery rate is less than 60 %. And then, electrosilicoaluminothermal method is developed, by which Ti-Si ferroalloy containing Ti more than 30% and Si less than 35 % can be produced, and Ti recovery rate is higher than 80%. Ti-Si ferroalloy can replace TiFe martially in steelmaking,and residue slag can be used to make cement.

14 The Experimental Research on Premixed Flame of Natural Gas in Electric Lamp Industry

Wang Yong , Wang Zhijun , Lu Xiaofeng

1996, 19(4):87-91.

[Abstract](529) [HTML](0) [PDF 263.51 K](117)

Abstract:
In this paper,the problems of feature and stability of the premixed flame are studied after Natural Gas / Oxgygen is changed by Natural Gas / Air containing rich oxygen in Electric Lamp Industry. The result shows that it is feasible that the mixture in which part of oxygen is steady by air containing rich oxygen and natural gas for premixing and combusting.

15 The Optimization of Complex High-dipping Mine-out Area Parameter

Xu Yingfu , Kang Huiming

1996, 19(4):92-96.

[Abstract](528) [HTML](0) [PDF 209.73 K](193)

Abstract:
The high-dipping, multi-seam coal, short distance, much damage and complex mine,the major unit of minins is working areas. The optimization of mine-out areas' parameter is complex,that is seldom studied in the world,it includes coal-mining method, the choice of working areas' cquipments of machine-electricity,layoat of roadways in working areas and the choice of parameter. Through the amprehensive andlysis,erecting all kinds of costs which are divided into the economic mathematical model of the least costs per ton-of-coal,using 18 standards of synthesis and the result of calculating by computer,this thesis chooses the complex high-dipping mine-out areas'parameter which is optimized. It is based on the example of Zhong Liang Shan mine.

16 Analysis of the Modulation Phenomenon of Complex Vibration in Gearbox Fault Diagnosis

Wang Zhijie , Ding Kang

1996, 19(4):97-102.

[Abstract](1015) [HTML](0) [PDF 283.47 K](135)

Abstract:
This paper presents a modulation phenomenon of complex vibration which occured when gear teeth broke or shaft seriously bent in gearbox. Based on the mechanism of gear vibration and modulation sideband,the peper analyzes this complex modulation phenomenon.

17 Orthogonal Back-Propagation Algorithm of Generalized Inverse of a Matrix

Zhang Bangli , Ye Zhongquan , Cao Changxiu , Liu Yiwu , Li Yingguo

1996, 19(4):103-106.

[Abstract](544) [HTML](0) [PDF 159.65 K](133)

Abstract:
Calculating generalized inverse of a matrix is a basic algorithm for inverstigating linear equations and optimization problems. In this paper we investigate the algorithm of generalized inversion of a matrix by using Orthogonalized Back-Propagation Algorithm (OBPA). There is no problem for convergence in OBPA. It is shown how OBPA avoids some of the difficulties posed by the Back-Propagation(BP)algorithm.

18 Study on Hydrokinetics of the Unsubmerged Premixed Abrasive Water Jet

Yang Qingwen , Liao Zhengfang , Liu Benli

1996, 19(4):107-110.

[Abstract](531) [HTML](0) [PDF 174.32 K](114)

Abstract:
A mono-liquid model is established according to formative character of the premixed abrasive water jet. The hydraulic structure is analyzed by the model. The relationship that is obtained between the axial shaft line velocity and the forget distance by the law of conservation of momentum is verified with the experiment.

19 A Study on the Social Sateguard System for Centralized Processing the Flammable Wastes as Substitute Fuel in Cementklin

Hong Wei , Chen WanzhiXiong Wengqiang , Yang Guang , Zhang Hong

1996, 19(4):111-116.

[Abstract](568) [HTML](0) [PDF 301.59 K](112)

Abstract:
The paper proposes to use the synthesis effect of commercial,technical and eraluational subsystems to establish the operational model of centralized process of flammable harmful wastes as substitute fuel in cementklin,and points out the method to establish social safeguard system on the basis of developing, maituining, protesting functions, and provide demonstration, conception and design for converting harmful wastes into harmless and resourceful sources in proctice.

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