Volume 18,Issue 3,1995 Table of Contents

1 Study on ZK Worm Gearing with the Property of Controllable Mismatched Contact

Qin Datong , Zhang Guanghui , Kato Masana

1995, 18(3):1-7.

[Abstract](517) [HTML](0) [PDF 283.66 K](644)

Abstract:
A methed to modify the cone-generated cylindric worm gearing(ZK-Wormgearing)with the proprty of controllable mismatched contact has been proposed.The basic principleof the modification has been analysed.The contact state of the worm gearing could be modified bychanging the contact position and the curvature modification amount,which could be realized conveniently by changing the geometric parameter and the setting parameter of the grind wheel in wormmachining.

2 Desiqn Parameter Related to the Sensibility of Torsion Vibration Natural Frequency on 2300 Rolling Mill Main Transmission System

Zhu Caicao , Tang Zhougyi , Zhou Yonghong

1995, 18(3):8-13.

[Abstract](686) [HTML](0) [PDF 210.56 K](910)

Abstract:
Based on the study of effec t of torsion vibration natrual frequency on rollingmill main transmission system , the sensibility formula of natural frequency related to design parameter is given,By the means of programming, analysis and calculation have been carried out on 2300rolling mill main transmission system,It provides theoretical asis for dynamic optimizing transmis sion svstems.

3 A Study on the Method of Extraction for 40 Hz EEG Bursts

Xiao Di , Zhou Shouchang , Yang Hao

1995, 18(3):14-19.

[Abstract](784) [HTML](0) [PDF 314.91 K](1201)

Abstract:
The bursts of 40HzEEG are a reliable indicator of the " focused arousal ". It hasan active significance in diagnosis of cognitive dysfunction.But, the bursts of 40 Hz EEG are seriously interfered by the high amplitude broad-band EMG signals from the scalp. It causes the difficulty of detection, This paper give a new method uf the combination of threshold extraction in frequency domain and neural network pattern recognition to realize the effective detection of 40 Hz EEGbursts , and reports the mean peak power of the 40 HZ EEG bursts for 11 subjects and analyses theirthinking states, The reaults indicate that the method given in this paper can be used feasibly and support the theory given by D,E, Sheer.

4 Fracture Geometry and Pressure Distribution in Fracture for Hydrofracturing

Yang Youkui , Xiao Changfu , Qiu Xiande , Wu Gang

1995, 18(3):20-26.

[Abstract](1110) [HTML](0) [PDF 310.93 K](1370)

Abstract:
It is proved first that hydrofracture has a self-similar elliptic extending characteristic which is independent of the praseure distribution in fractures by the theory of fracture me-chanics in this paper.Based on this theory ,the approximative analytic solutions of pressure distribution in fractures have been put forward by fracture mechanics coupled with fluid mechanics.

5 Study on the Factors Affecting Gas Permeability of Coal

Zhang Guangyang , Hu Yaohua , Jiang Deyi

1995, 18(3):27-30.

[Abstract](878) [HTML](0) [PDF 190.59 K](1073)

Abstract:
In this paper,the permeability of coal from Nantong colliery is studied in a labo-ratory. The effects of desorbed gas temperature and water content on gas permeability were investi-gated. The results of experiments indieatd that decreasing gas pressure without desorption , the permeability of coal decreases, However, below the desorption pressure, the permeability of coal formethane increases, The reaults suggest that the logarithm of permeability of coal is a linear functionof the temperature and the permeability of coal saturated with water is lass than the permeability ofdry coal; with the increase of water content, the permeability of coal for methane is increasing.

6 Identification Method of Acoustic Information Flow of Gear State

Yu Chengbo , Liang Depei , Liang Xichang

1995, 18(3):31-35.

[Abstract](654) [HTML](0) [PDF 250.59 K](1007)

Abstract:
According to the transmission way of information flow of gear noise ,we presentthe method of solid state acoustic detection, Noticeing transmission characteristic of the acoustic information flow, we develop and deduce the time domain seperating method. The experimental resultshows that the method can identify gear failure and also can extract the acoustie information flow ofwhich can correctly reflect,the gear moving characteristic , It is very useful to monitor the gear statecharacteristic.

7 Study on Temprature Charcter of Water Heat Pipe

Ke Ling , Chen Yuanguo , Xie Huande

1995, 18(3):36-41.

[Abstract](526) [HTML](0) [PDF 252.33 K](1235)

Abstract:
比较了几种工质在近室温范围的性能并对20～60℃的水热管特性进行了研究，认为在该温度区间水仍为较合理工质，实验测得了20～60℃水热管的换热系数及最大热流密度，并整理出该研究范围的热管蒸发段和冷凝段换热特性的关联式。

8 The Mechanism of the Moisture Evaporation Inside the PorousCapillary Material in the Decreasing Rate Period of Drying

Li Yourong , Jin Mingcong , Tan Jingwen

1995, 18(3):42-46.

[Abstract](869) [HTML](0) [PDF 234.21 K](161)

Abstract:
The evaporation region medel,based on the characteristic of the moisture evaploration inside a capillary tube and the pore distribution,is presented for analyzing the moisture evaporation inside the porous capillary material in the decraseing rate period of drying. The differential equation describing the moisture evaporation region is established and the general expression calculating the evaporation intersity is obtained, Then,the influences of the pore distribution on the evaporation region and the evaporation intensity are alse discussed.

9 An AnalytiCal Method for Solving ReactiVe Planning optimization in Power Systems

Wang Zhuding , Feng Xishan , Hang Zexiu , Deng Enhong , Deng Zhongyu

1995, 18(3):47-51.

[Abstract](583) [HTML](0) [PDF 208.72 K](116)

Abstract:
基于解耦方法，以各支路无功潮流为规划变量，并考虑了支路无功损耗的影响，构造了无功优化的非增量2次规划模型，其目标为因为无功补偿使有功网损减小获得的收益并扣除补偿费用后的净化现值最大。采用可完全消除增量变量迭代收敛性问题的拉格朗日乘子法和处理不等式约束的“违限取限”法，求解具有环网的电力网无功优化问题并附有算例，模型适用于35～110kV电力系统的无功优化。

10 The Multi-objective Fuzzy Optimal Power Flow Model and its Neural Network Algorithm

SunHongbo , XuCuoyu , Qin Yihong

1995, 18(3):52-58.

[Abstract](674) [HTML](0) [PDF 276.61 K](157)

Abstract:
This paper has presented a multi-objective fuzzy optimal power flow medel.Inthe model , the multiple objectives, such as the minimum generation cost and the minimum powerloss, have been considered simultaneously, A new algorithm based on neural network models is aisopresented,in which the neural networks are employed to express, the membership function of fuzzysets and solve the optimization problems. The validity of model and algorithm is verified with numerical examples.

11 The Study on the Branched Feedforward Neural Network

WuNing , LiRenqiang

1995, 18(3):59-63.

[Abstract](784) [HTML](0) [PDF 232.14 K](121)

Abstract:
Based on the BP algorithm,the Branched Feedforward Neural Network,one ofthe artificial neural network medel used for pattern classification is proposed in this paper, and therelated algorithm is also offered here, Several typical examples of pattern classification are studiedwith computer simulation, The simulation results show that the training time of Branched Feedforward Neural Network is obviously reduced and the classifying effect is much better as compared withgeneral BP Network.

12 The Inherent Fault Tolerance of Multi-Layer Neural Networks

YangXiaofan , Chen Tinghuai , Wang Xueqin

1995, 18(3):69-75.

[Abstract](1016) [HTML](0) [PDF 285.88 K](209)

Abstract:
The inherent fault tolerance of multilayer neural networks (MLNs) is due to thedistributed properties of information processing and information storage in an MLN , and the inher-ent fault-masking capability of every neuron. Also,the concept of inherent fault tolerance of MLNsis formalized, Finally, perceptrons and three-layer nets are shown inherently fault tolerant underreasonable statistical conditions,respectively.

13 The Kinetic Study of Adsorption of Methane on Anthracite and Its Char

Chen Changguo , Xian Xiaohong , Zhang Daijun , Xian Xuefu

1995, 18(3):76-79.

[Abstract](688) [HTML](0) [PDF 166.92 K](115)

Abstract:
The adsorption quantities of methane on anthracite and its char at different tem-perature and time were measured by using volumetric niethod. The corresponding adsorption formula-is presented. The experimental results have shown that the diffusion acti-vation energies of methane in the anthracite and its char are 14.3 kJ/mol and 26. 3 kJ/mol.It issuggested that the diffusion process of methane could be the flow through the micropores in the an-thracite and its char.

14 Investigation of Surface Viscosity of BF Slag Bearing High Titania

Bai Chenguang , Wen G uangyuan , ZhuQunhua , Zhou Peitu , Pei Henian , Yang Xiaoyuan

1995, 18(3):80-85.

[Abstract](527) [HTML](0) [PDF 231.48 K](225)

Abstract:
In this paper the surface viseosity of BF slags bearing high titania has been mea-sured by an experimental device called LASVIM(Laser Surface Viscositymeter)which is designedby authors,and the comparision of the results with the previous works of the authors shows that thesurface visccoity of BF slag containning high titania is depending on its foaming property, Severalfactors on the surface viscosity are also investigated.

15 A Stolving method for a group of differential equations and the solution of circular plate thermo-bending

Yin Yihui , Chen Yuze

1995, 18(3):91-96.

[Abstract](571) [HTML](0) [PDF 225.15 K](115)

Abstract:
A theorem solving a group of non-homogeneous linear differential equations tlirough integrating its basic solutions is putforward and proved,the mothematical play and physical natrue of the theorem is expouded, As an example,the theorem is applied to solving the question of thermo-bending of circular plate irradiated by laser.

16 Application of the Method of Ordinary DifferentialEquations in Multiobjective Programming

Zhou Zongfang , Duan Yurong

1995, 18(3):97-100.

[Abstract](566) [HTML](0) [PDF 192.57 K](806)

Abstract:
In the author's previous works,a methed of ordinary differential equations forsolving multiobjective programming problem had been presented. In this paper, we further use ordi-nary differential equatfons to discuss the general multiobjective programming Problem and its con-straints more deeply. Under certain conditions, starting from some neibourhood of any feasible solu-tion of multiobjective programming problem, along the trajectory of the established system of ordi-nary differential equations,the solution is always conversent to the(weak)efficient solution of theoriginal multiobjective programming problem with respect to partial arguments.

17 A New Method for Dynamic Measurement of High-Accuracy Linear Grating

Gao Chao , Yang Shixiong , Gu Qingxiang

1995, 18(3):101-105.

[Abstract](560) [HTML](0) [PDF 220.08 K](1003)

Abstract:
Based on the principle of double frequency laser interference measurement ofhigh accuracy linear grating. This technique is discussed in detail from two aspots:totol lenth cumu-lative error measurement and Morie fringe signal quality analysis of linear grating.It includes lasersignal processing tochnique, signal sampling,computer interface circuit and related algorithm. withthis methed, we can not only get its accuracy parameter of a linear grating, but aiso analyze the er-ror factors which would affect the accuracy of a linear grating in graving process. In addition,it cancny out dynamic measuremtns for other length metrological elements.

18 An Introduction to an Application Software Frarpe Work for Object-Oriented Client /Server

Xu Shourong , Zhang Bangli

1995, 18(3):106-109.

[Abstract](631) [HTML](0) [PDF 205.15 K](1043)

Abstract:
This paper presents the lately released frame work for Client / Server applica-tions software development, stressing on the characteristics of its OOP and Multi-DataBase supports.

19 The Analysis of Trend of Development of Technology of Reusing Solid Waste in Our Country

Xiong Wengqiang , Yang Guang , Li Shuqing , Chen Wanzhi , Chen Demin

1995, 18(3):110-116.

[Abstract](894) [HTML](0) [PDF 373.02 K](1048)

Abstract:
To analyse the situation of industrial solid waste in our country,tracking thetrend of development of technolog of reusing solid waste in outer country,connecting with researchof statement ,we can point out standing on comprehensive utilization ,breaking through key technolco-gy, improving utilization factor, keeping at popelaration,it is in vitably trend to advamce the devel-opment of technology of reusing solid waste in our country.

20 New Approach for Electron Affinity of Polyvalent Ions

Wang Yuanliang , Du Huiqin , Se Xin

1995, 18(3):117-118.

[Abstract](734) [HTML](0) [PDF 95.19 K](914)

Abstract:
A new calculating model was derived from the relation of absolute hardness tothe radii of polyvalent ions. The computational results with this model are very well consistent withthe experimental values.

21 Fertilizing Model

Ren Yuzhi , ZhaoHongyu , YuYan , Ren Shangqiang

1995, 18(3):119-124.

[Abstract](842) [HTML](0) [PDF 235.68 K](620)

Abstract:
根据给定的施肥量与产量关系的实验数据，通过必要的假设和合理性分析之后，用二次函数去拟合氮肥的作用模型，而用威布尔生长模型去拟合磷、钾肥作用模型。同时，引入修正量△Y对模型进行修正，并从实用价值角度对模型进行讨论中得到了最大产量的范围，还讨论了施肥为0时产量值不为0的原因，最后讨论了模型的优缺点。

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