Volume 18,Issue 2,1995 Table of Contents

1 The Application of the Theory of 40 Hz EEG in the Stady of Chaotic States of EEG Signals

Wang Guilan , Zhou Shouchang , Yang Hao

1995, 18(2):16-20.

[Abstract](492) [HTML](0) [PDF 236.34 K](1029)

Abstract:
In this paper,the theory of 40 Hz EEG bursts is firstly used to judge whether thesubjects cooperate with us or not,and to determine the segments which can be processed for the studyof chaotic states of EEG signals.The theory,the realization of detecting method and the practiceapplication of 40 Hz EEG bursts are studied.

2 The Maximum Connectivity of the Line Graph over Quasi-regular Graphs and Its Application

He Zhongshi , Yang Xiaofan , Chen Siqing

1995, 18(2):21-26.

[Abstract](750) [HTML](0) [PDF 244.68 K](1081)

Abstract:
引入了则（ｐ，ｑ）图的最大线图连通度Ｒ（ｐ，ｑ），得到上、下界至多相差１的Ｒ（ｐ，ｑ）的取值范围：２ｍ－２≤Ｒ（ｐ，ｑ）≤２ｍ－２＋［２ｍｒ＋ｒ／ｍｐ＋ｒ］，其中ｍ＝［２ｑ／ｐ］，ｒ＝（２ｑ）ｍｏｄｐ。将此结果应用于容错多总线系统的最优设计，提出了两类最优容错设计，推广了已有结果，并揭示出处理机个数相对于总线条数较大时最优容错设计的广泛存在性。

3 Study of Multivariable Adaptive Fuzzy Control Algorithm With Hierarchical Structure

Bai Li , Yang Yongzhen

1995, 18(2):27-32.

[Abstract](594) [HTML](0) [PDF 255.66 K](1024)

Abstract:
In this paper a class of multivariable fuzzy adaptive con trol algorithm withdecoupling design is propoed,The proposed simplification controller is based on the decompositiontheorem of muItivarinble fuzzy conditional statement andhierarchical multirules structure,Thefuzzy modification of controller's rule is achieved by looking for a medifiable coefficient table forrestraining disturbance.Simulation results demonstrate the effectiveness of the controller.

4 Theoretical Research on Characteristics of Polarization Controller Basedon a Fiber Recirculating Delay Line with a Twisting-Fiber Device Introduced

Pan Yingiun , Gu Yuan , Huang Shanglian

1995, 18(2):33-37.

[Abstract](651) [HTML](0) [PDF 216.03 K](893)

Abstract:
The transformation characteristics of the controller based on a fiber-recirculating delay line in which the twisting-fiber device is introduced are analyzed by the useof coupled-mode and matrix optics theory,the Jones matrix representing this controller is obtained,and the effect of twisting fiber ori the polarizdtion characteristics of this controller is analyzedtheoretictically.

5 An Estimating Method of Ultimate Gain and Ultimate Period

Sun Dihua , Liu Weining

1995, 18(2):38-42.

[Abstract](889) [HTML](0) [PDF 221.43 K](1482)

Abstract:
At tuning PID controller,ultimate gain Ku and ultimate period Tu of the proceseare usually the desired parameters.To lessen disturbance of tuning action and av oid to drive thesvstem to the verge of instability,a new estimating methed of Ku and Tu is developed,which based onthe charactristic areas of the u nit step response of the procase,By this method,it is easy forauto-tuning PID controller with Ziegler-Nichols like tuning formula. Results of digital simulationshow that this method is effective.

6 A New Rectifying Technique of Discrete Spectrum Analysis

Xie Ming , Ding Kang

1995, 18(2):48-54.

[Abstract](723) [HTML](0) [PDF 248.74 K](1024)

Abstract:
提出了一种对幅值谱进行校正的新方法，用以解决离散频谱当谱峰没有对正峰顶，有能量泄漏所带来的误差，并讨论了矩形窗、汉字窗、海明窗和高斯窗四种窗函数的修正方法，校正的频率、幅值和相位的精度可达细化１００倍上的效果。

7 A Kind of Directing Operation Expert Systems Based on Self-adaptive Predictor

Huang Xiyue , Chai Yi , Deng Renming

1995, 18(2):55-58.

[Abstract](529) [HTML](0) [PDF 214.68 K](167)

Abstract:
In the general directing-operation expert systems.the information of directingoperation is often shown after the subprocess has finished,The aim of the thesis is to enhance thefunction of directing-operation,and suggest that we add the self-tuning predictor in the expertsystems and use it to direct the present operation.We have shown the case oftemperature-predicting experiment made in the small wine distillatorv so that we can illustrate thatit is feasible to use the predictor to direct the operation.

8 The Application of Fractal to Submicron Particle Sizing

Guo Yongcai , He Zhengjang , Xie Lili , Yang Guanling

1995, 18(2):59-62.

[Abstract](720) [HTML](0) [PDF 209.08 K](312)

Abstract:
Brownian Motion is one of the important characteristics of submicron particles.On the basis of observatiorl for Brownian motion of particles,the authors present a medel to describethis physieal process by usin g fractal theory a nd this medel is proved to be valid in theory.Throughfurther an alyzing,we establish the relationship between fractal characteristics and particle sizeparameters.Combining image signal processing technique,particle size information can be obtainedby computing fractal dimension values,and then a new method for particle sking will be developedinfuture.

9 The Influence of Sweep Angle on the Forced Convection of oil in a Tube with Flag-type Insert

Xiang Dong , Chen Li , Chen Qing Hua

1995, 18(2):68-73.

[Abstract](649) [HTML](0) [PDF 263.25 K](186)

Abstract:
实验研究了水平圆管内插入旗形件时其后掠角对３０＃透平油的对流传热及流阻特性的影响。实验圆管为φ２４ｍｍ×２ｍｍ×７００ｍｍ的紫铜圆管，后掠角为８６°，８１°，７６°，７０°，６５°五种。其它参数范围为：１４６≤Ｐｒ≤２０６，１０６７≤Ｒｅ≤６８５７，０．０７＜ｃｏｓ＜０．４２。实验范围内，换热系数首先随后掠角的增大而上升，然后又下降，在后掠角７６°左右呈现出最佳值，阻力则随后掠角的增加而增加。

10 On the Noise Analysing and Reducing for Refrigeratory compressors

Jiang Guoqing , Chen Yangle , Xu Daolian , Liao Nianzhao , Ze ng YouZhang

1995, 18(2):74-80.

[Abstract](846) [HTML](0) [PDF 310.40 K](219)

Abstract:
This paper propose an approach to reduce the regular pulse noise from ofQD55A air flow refrigerator compressor.The Rource is analysed by spectral a nalyeis techiques.Thenoise level is droped 4dB via massive preduction testing verification,and a desirable result on noise reduction has been obtained.

11 Unicity Theorem of Meromorphic Functions

Qiao Jin , Gu Yongxing

1995, 18(2):81-85.

[Abstract](804) [HTML](0) [PDF 170.99 K](210)

Abstract:
ln this paper,we firstly in vestigated the un icity properties of meromorphic functions with three common values,extended the results of H. Ueda,Yi Hongxun.Moreover,wealso improved the results of K,Shibazaki,Yi Hongxun and C,C,Yang,Hua xinhou and some others

12 A Reactive Power Optimization of Classic Method Combined with Lincar Programming

Zhao Youxin , Liu Longrui

1995, 18(2):86-91.

[Abstract](693) [HTML](0) [PDF 254.74 K](145)

Abstract:
A tow-stage VAR optimization model is presented in this paper.First.the optimal solution is quickly solved by VAR classic method,which only considers the limitaryconditions of Reactive Power and reactiue power equation and yet linear increment model based onsensitivity is set up and linear programnung is employed to correct the overlimit varlables,Theoptimal resnlts in the tirst stdge are corrected to be feasible.The proposed method has beensuccessful in the sample systems and reai systems.

13 A Feasible Method of Improving the Judging Matrix

Zhang Wenliang

1995, 18(2):92-96.

[Abstract](640) [HTML](0) [PDF 170.89 K](167)

Abstract:
By Uusing the data of the source judging matrix,and based on the optimalprinciple of logarithmic minimum squares a media judging matrix is firstly proposed to meet thedemand of consistance,Then,based upon the matrix,a new judging matrix is suggtsted with themethod of intergrating functions to meet the demands of the consistance exam and having a practical use.By calcaulating a large amount of real examples,the method is proved to be feasible and valid.

14 Research and Application of Kiln Furniture with High Performance

Chen Bei , Wei Ruihang , Ao Mingchen

1995, 18(2):97-101.

[Abstract](533) [HTML](0) [PDF 226.23 K](131)

Abstract:
介绍了一种用磷酸盐作粘结剂，粘土熟料、矾土熟料为骨料，用适量添加剂，经低温处理得到的托板材料。该材料耐压强度＞５０ＭＰａ，导热系数＜０．６Ｗ／ｍ．ｋ，抗热震性＞１５０次，成本约为目前窑具材料的１／２。

15 Application of Linear Programming in the Steady-State Real Power Security Region

Fan Rongquan , Zhu Jizhong , Xu Guovu

1995, 18(2):102-108.

[Abstract](601) [HTML](0) [PDF 308.55 K](156)

Abstract:
This paper presents a new rnethod for analysis and computation of steady-statereal power security region by linear programming.In this method based on the D.C load flow,theupper and lower bounds of the hyper-cuboid explicit steady-state security region are chosen asunknown variables.The objective function is the total amount of the adjustable generations withweighting factors.The model of the steady-state real power security region is changed in to the proposed linearprogramming methed for ealculation.The numerieal exarnples are tested on IEEE 6-bus and 30-bussample systems.The computational resuIts showed the proposed model a nd algorithm feasible andeffective.

16 Mathematical Model of Oxygen Blast Furnace with Preheating Gas Injection into Upper Shaft

TanXim , XuChuShao

1995, 18(2):109-115.

[Abstract](531) [HTML](0) [PDF 312.17 K](1316)

Abstract:
An One-dimensional mathematical model,based on oxygen blast furnace with preheating gas injection into upper shaft,has been developed to describe the variation of innerdiameter of blast furnace,13 chemical reactions,the heat losses through the furnace wall,the heatexchange and pressure losses between gas phase and solid phase.The characters of oxygen blastfurnace are discussed,The simulated results indicate that the tem perature of burden in creasesthroughout the upper shaft with the incrcasement of the flow and the temperature of preheating gasinjected,and that the effect of the heating-up of burden is not so large when the com positions ofpreheatin8 gas injeetion are changed.The model is contributed to obtain a deeper understanding ofthe oxygen blast furnace process.

17 Study on the Model for Accounting the Cost of Discarded Iron

Ren YuLong , PuYouJiaw , WangYu

1995, 18(2):116-121.

[Abstract](680) [HTML](0) [PDF 278.92 K](1102)

Abstract:
Starting with the view of wealth taking advantage of the method of in put-output analysis,paying attention to both the labor value com prehended in discarded iron and thevaiue of raw natural resource in it,this paper presents a general model to accou nt the cost ofdiscarded iron,As an example of our country.the model of accounting the cost of the discarded ironhas been stueied carefully and the cost of discarded iron is calculated. the resuIt of calculationindicates the practieality of this model.

18 The Preliminary Study of the Automobile Steering-gear Performance Test Theory and Its Test System

Zhou Yi , Zhu Minjun

1995, 18(2):122-124.

[Abstract](624) [HTML](0) [PDF 123.44 K](768)

Abstract:
This paper presents a new steering-gear performance test calculation formula,and set up a corresponding test system on this basis,and obtain a preliminary test result.

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