Volume 17,Issue 3,1994 Table of Contents

1 Composition Errors Correction Iechnioue for Manufacture of High Acceracy Grating

Chen Ji , Yang Shixiong , Gu Qingxiang , Yu Hong

1994, 17(3):7-12.

[Abstract](602) [HTML](0) [PDF 318.30 K](948)

Abstract:
在用线性系统和随机过程理论分析光刻机误差传递特性的基础上，采用时间序列分析法建立误差的数学模型，提出了综合误差修正的新方法，介绍了微机综合误差实时修正系统的电路结构与工作原理。其主要特点是，不仅能修正系统误差，而且能够根据对随机误差的预报来修正相关的动态误差。实验结果表明，系统修正精度达到±０．１μｍ。

2 A Fast One-Step Scanning Thinning Algorithm

Wu xiaoyun , Zhang Taiyi , Liu Pin

1994, 17(3):13-17.

[Abstract](543) [HTML](0) [PDF 205.64 K](1025)

Abstract:
A new quick thinning algorithm was presented in this paper,which assigneddifferent weights to different pixels near the skeleton pixels and rules out the im possible pixels in thethinning procedure. It needs neither iteration on pixel panel nor detection on every pixel such thatthe time consumed is greatly lessened. A filling algorithm is also offered for better results.Experiment on variety of binary patterns showed that it could get both a high speed and a goodskeleton shape compared with other algorithms,This new algorithm reaches perfect result.

3 The Evaluation to Heat Transfer Performance on Enhanced Heat Transfer Surface in Heat Exchang

Liao Qiang , Xin Mingdao

1994, 17(3):18-24.

[Abstract](566) [HTML](0) [PDF 313.70 K](1163)

Abstract:
以热力学第二定律为基础，在熵产分析的基础上提出了新的传热性能评价判据－强化传热性能因素。

4 The Unified Representation of Interface Conditionsof Electromagnetic Quantities Using Exterior Differential Forms

Yun Zhengqing , Tan Bangding

1994, 17(3):25-31.

[Abstract](509) [HTML](0) [PDF 240.51 K](881)

Abstract:
A continuity condition of p-forms across a p-dimensional submanifold isderived.The,various interface conditions of electromagnetic quantities are obtained through theapplication of the continuity condition to Minkowski manifold of space-time.

5 Behaviour of Reduction and Impoverishment of TiO2 in Molten Slag in Smelting Silico-titanium Ferroalloy Using Titanium-bearing slags by Electrosilicothermic Method

Li Zushu , Xu Chushao

1994, 17(3):32-38.

[Abstract](641) [HTML](0) [PDF 338.84 K](1464)

Abstract:
In this paper the mathematical model is established on the behaviour ofreduction and impoverishment of TiO2 in molten slag in smelting silico-titanium ferroalloy usingtitanium bearing slag by electrosilicotherinic procese under experimental conditions.It is studied thatthe influences of smelting conditions,such as smelting temperature,initial basicity of burden,quantity of reductant,smelting time and TiO2 content of slag on the reduction and impoverishmentof TiO2 in molten slag.

6 The Area Effect in Slit Island Method and the Essence of False Appearance on Fracture Fractal Dimension

He zongyan , Gao Zhihui

1994, 17(3):45-53.

[Abstract](504) [HTML](0) [PDF 463.52 K](165)

Abstract:
金属材料断口分维佯谬的实质在于Ｆｒａｃｔａｌ图形的面积效应。该效应可用周长与面积方根的比例参数描述，并以此说明了材料韧性与分维呈相反变化，分维随测量码尺而变化的原因，同时还给出了真实分维的计算方法和临界码尺的估计方法。

7 The Direction Characterisitic of Stress Gradient in Crack Structure and Three-Dimensional Line-type Element

Qing Jialong

1994, 17(3):54-59.

[Abstract](487) [HTML](0) [PDF 282.62 K](180)

Abstract:
Analysis is given to the direction characteristic of stress gradient in crackstructure by using three-dimensional line-type element,The purpose is considerably to reduce theoperation of computation and improve the computation precision in finite element analysis.

8 Stability Research on D. C Voltage Close Loop Control for an Active Power Filter

Lou Shiguo , Hou zhencheng

1994, 17(3):60-68.

[Abstract](692) [HTML](0) [PDF 385.13 K](164)

Abstract:
分析了三相系统中无功电流和谐波电流瞬时功率的性质。从有源电力滤波器交直流侧瞬时功率平衡方程的角度出发，推导了关于小信号扰动的近似等效的数学模型，获得了在此例控制和比例积分控制下的稳定性判据。最后用计算机仿真验证了理论分析的正确性。

9 The Theoretical Investigation on Shear Property ofAnisotropic Discontinuity under Three-dimensional Stress State

Li Tonglin , Wang Yanhui , Liu Chuanwei , Du Yungui , Liu Hongzhou

1994, 17(3):69-74.

[Abstract](529) [HTML](0) [PDF 309.71 K](174)

Abstract:
Based on the original characteristics of discon tinuity in crustal stress field,considering the spatial shape of Jagged discontinuity and its velation with stress field,these formulasof shear motion direction,the anisotropic dilatancy(normal and widespread)and strength proportyof discontinuitv in three-dimensional stress field are derived under two different boundary conditionsof free and restraining displacement, and the widespread stress in crement under the displacementbeing restrained can be calculated.Pinally the anisotropic rules of discontinuity in three-dimensionalstress field are also confirmed by experimental data.

10 Colourful Electrolysis of Aluminium

Fu Biaohong , Zhang Zhicheng , Ren Shaoguang

1994, 17(3):75-79.

[Abstract](502) [HTML](0) [PDF 251.39 K](190)

Abstract:
The technological conditions through rhombic tests were put forward in theresearch.On the basis of anodizing in sulphuric acid, phosphoric acid is used twice for anodictreatment. And then electrolytic colouring with Nickel Sulphate is completed.Finally,brighter andmore colourful films are produced by sulphosalicylic acid electrolysis. The property of colouful filmswas measured and evaluated. Morever.the composition and structure of the films was determined with x-ray-diffraction and SEM.The mechanism of colouring has been discussed in this paper.

11 Metapositive Definite Problem in Both Kronecker Product and Hadamard Product of Metafositive Definit Matrices

LiXing

1994, 17(3):92-94.

[Abstract](1152) [HTML](0) [PDF 116.96 K](280)

Abstract:
In this paper,a lass of particular metapositive difinite matrices has beendissussed,and two different sufficet conditions under which Hadamard self-multiplications andKronecker self-multiplications of a metapositive difinite matrix are also metapositive difinitematrices have been given.

12 Temperature-DifferentiaI Drawing of Austenite Stainless Steel

Qiu zhongyi , Sun Lunbao , Ai Baisheng

1994, 17(3):95-98.

[Abstract](693) [HTML](0) [PDF 250.66 K](218)

Abstract:
A temperature-differential drawing process is adopted on the basis of structuredeformation characteristics of austenite stainless steel.With this process,the degree of strainhardening,can be effectively controlled.aging crack be prevented and drawing limit be enhanced,thus the number of drawing operations can be reduced.and intermediate annealing and picklingoperations be eliminated. Therefore,an economic benifit is prominent.

13 The Theoretical Expression of Carbon Potential for Carburizing Atmosphere and Its Exact Measurement

Zhang Dinfei , Yang Zhenxing , Wu Enling , Chen Yu

1994, 17(3):99-104.

[Abstract](555) [HTML](0) [PDF 271.03 K](1495)

Abstract:
The paper deals with the signification of carbon potential and its influencefactors. The exact expression of carbon potential has been deduced on the basis of reactionthermodynamics and masstransfer kinetics for carburization,and according to these a new methodto measure carbon potential quickly and exactly has been suggested.

14 Erosion of Smelting Reduction Melt on Refractory Lining

Liu Qingcai , Zhang Binhuai , Zhang Tao , Zhou Deyu , Yu Mouhua

1994, 17(3):105-111.

[Abstract](795) [HTML](0) [PDF 394.68 K](913)

Abstract:
The melt of smelting reduction with iron bath Possessed high oxidizability andlow basicity. This paper studied the erosion rate and extent of molten slag and iron on different kindsrefractories and the micro-structure changing.It was shown that the main factor of corrosion liningwas the reaction between melt and oxide existing in lining.The serious zone was the interfacebetween slag and iron bath and slag surface. The greater the concentration of iron oxide,the higherthe erosion rate is.So is the temperature.

15 Effects of Unburnt Pulverized Coal on the Degree of Graphitization of Coke

Zhu Zizong , Zou Deyu , Zhang Binghuai , Sheng Yongling

1994, 17(3):112-116.

[Abstract](617) [HTML](0) [PDF 220.82 K](930)

Abstract:
In order to clarify the effect of unburnt pulverized coal(UPC)on the degree ofgraphitization of coke,the experiments were carried out.Pure coke was in a laboratory heated atconstant temperature for an hour,and then gasified for another hour. Next,UPC was injected intothe coke and gasification was continued for one more hour.

16 Experiments on Forced Convective Heat Transfer Performance in Rectangular Microchannels

Xin Mingdao , Shi Jinsheng

1994, 17(3):117-122.

[Abstract](713) [HTML](0) [PDF 252.67 K](983)

Abstract:
对６种不同结构尺寸的微矩形槽道内的受迫流动阻力与换热性能进行了实验。结果表明，试验条件下微槽内水流动中从层流向湍流转变的临界雷诺数Ｒｅｃ＝１４００－１８００．揭示出微槽结构尺寸对流动与换热的影响，并由实验给出了层流区流动阻力与换热的经验关系式。

17 Effects and Significance of a Traditional Medical-tea on the Hemorheology of Coronary Heart Disease Patients

Xiao Jun , Ouyang Keqing , Cai Shiaoxi , Quan Xuejun

1994, 17(3):123-126.

[Abstract](607) [HTML](0) [PDF 201.25 K](773)

Abstract:
With hemorheological methods. a new traditional chinese medical-tea(TCMT)and its effects on the coronary heart disease(CHD)has been studied.A series of data from the CHDPatients before and after taking TCMT,including apparent viscosity,viscoelasticity, theconcentration of fibrinogen and other clinical indexes,showed that the TCMT could promotedisintegration of RBC aggregation,reduce the concentration of fibrinogen and the plasma viscosityand cut down the resistance of microcirculation therefore improve the human circulation, Nontoxiceffects was found in the clinical experiments.It can be expected that the TCMT as a usual drink is beneficial to the CHD.

18 The Proof of a Conjecture for the Formula of Expected Inspection of Multiple Pooled Sample Test

Huang Wei

1994, 17(3):127-130.

[Abstract](519) [HTML](0) [PDF 148.68 K](796)

Abstract:
The double sample test was proposed first but no proof by Wen Qiyu. This test ismore saving than the simple pooled sample test.The paper[1] also gave a conjecture for the formulaof expected inspection number of n-fold pooled sample test.This paper first gives a simple proof ofthe conjecture by probabilistic methods and obtains another form of the conjecture independently andproves the two Conjectures are eqLlivalent.

19 Analysis of the Strength and Stability of Type CYM Hydraulic Anchor Station

Lai Yunin , Gao Tianin

1994, 17(3):135-140.

[Abstract](363) [HTML](0) [PDF 355.67 K](644)

Abstract:
The structure of type CYM hydraulic anchor station and its principle ofoperation are briefly introduccd,and its strength and stability are analyzed.

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