Volume 12,Issue 6,1989 Table of Contents

1 THE METHOD OF THE MEASUREMENT OF THE WORMWHEEL PROFILE ERROR WITH THE THREE-COORDINATE-MEASURE-MACHINE

1989, 12(6):1-6.

[Abstract](515) [HTML](0) [PDF 251.31 K](661)

Abstract:
In this paper we explain the method of the measurement of the wormwheel profile error with the three coordinate measuring machine. We first establish the wormwheel theoritical tooth profile equation according to the gear engage principle, then write the computing program and calculate the wormwheel theoritical profile, next analyse and calculate the error of the gage head interference. At last, we work out the measuring program and get the wormwheel profile measured with the three-coordinate measuring machine.

2 ANALYSIS AND PROGRAM FOR CHUNK AND STIFFENED SHELL STRUCTURES BY FINITE ELEMENT METHOD

Liu Chongde Qin Yi Wang Chongyou

1989, 12(6):7-14.

[Abstract](599) [HTML](0) [PDF 347.76 K](847)

Abstract:
The improved isoparametric shell element and the biased Isoparametric beam element are applied to the composite structures which consist of cubic chunks and stiffened shells. A flexible and practical method is found for this type of composite structure. The example shows that the theory and program are efficient.

3 EQUIVALENCE HEAT CONDUCTION COEFFICIENTS IN MULTIPHASE SOLIDS

Zhang Peiyuan Yan Bo

1989, 12(6):15-20.

[Abstract](756) [HTML](0) [PDF 233.29 K](979)

Abstract:
With the background of composite materials, this paper approaches the theory of the equivalencn heat conduction coefficients in multiphase solids and the method that concerns weth the prediction formula for design. The equivalence heat conduction coefficients of fiber reinforced and hollow sphere filled composite materials would be particularly proposed.

4 FAST ADAPTIVE FILTERING ( FAF ) FOR THE PROCESS DETECTION CONTROL SYSTEMS

Zhang Zhaohui Zhu Linzhang

1989, 12(6):21-27.

[Abstract](593) [HTML](0) [PDF 348.28 K](985)

Abstract:
The limitation of LMS adaptive noise cancelling (ANC ) is analyzed here. Based on the discussing of general signal and noise model of process detection control system, a fast adaptive filtering(FAF) is proposed on the basis of modelling the correlativity between the noise and it's correlative noise with the view of large noise. Fast transversal filtering ( FTF ) adaptive, algorithms is used to imitate the correlative modelling. Both simulation and experiments show that the method presented in this paper is suitable for the process detection control system , and it exhibts better results than the LMS noise cancelling method.

5 AN INEXACT REASONING INFORMATION MANAGEMENT SYSTEM

Wang Tingkai

1989, 12(6):28-32.

[Abstract](540) [HTML](0) [PDF 315.84 K](1140)

Abstract:
The author introduces some basic ideas and methods of artificial intelligence into an information management system,and therefore proposes a design for the information management system which has the ability of inexact reasoning based on the certainty knowledge. According to the design, the system can also be made with the flexibility of change and expansion, and good adaptability for application. This paper describles the design and its programing skill in detail.

6 CONDENSATION HEAT TRANSFER ON THE THREE-DIMENSIONAL EXTENDED SURFACE TUBE ATTACHED BY A POROUS DRAINAGE STRIP

Du Yang Xin Mindao

1989, 12(6):33-39.

[Abstract](468) [HTML](0) [PDF 348.34 K](690)

Abstract:
An experimental study was carried out for the condensation heat transfer on the three dimensional extended surface tube attached by a porous drainage strip. The results show that the combination of the three dimensional extended surface and the porous drainage strip is the effective method enhancing condensation heat tiansfer on the horizontal tube. The change of the shape arid depth of the axial grooves results in a 10% vaitation of condensation heal transfer coei ficienls. In the range of the experiments, for aocohol as the working fluid, the enhancement is up to 152%, and for water, 185% as compared with the horizontal low-finned tube.

7 REAL POWER ECONOMIC RE-DISPATCH WITH SECURITY CONSTRAINS OF POWER SYSTEM

Zhu Jizhong Xu Guoyu

1989, 12(6):40-47.

[Abstract](638) [HTML](0) [PDF 412.84 K](175)

Abstract:
This paper reports on application of network flow programming to the real power economic redispatch with security constraints. For the contingency state which violates the line security constraints , the re-dispatching is performed by eliminating the curtailment of real loads. The network flow model is incremental, and is solved by OKA. Therefore, it is very simple, fast and accurate. The model and its solution algorithm are tested on JEEE 30 bus system and the encouraging results are obtained.

8 STUDY OF SURFACE AC FLASHING PROCESS OF ICED INSQLATORS

Sun Caixin Zhang Jianhui Chen Mingying Gu Leguan Jiang Xingliang

1989, 12(6):48-54.

[Abstract](527) [HTML](0) [PDF 418.82 K](163)

Abstract:
From the testing results in the artificial climate room in Chongqing University, this paper discribes the AC flashover process of cylindoric insulators and suspensive ones, and presents the relations between iced insulators AC flashover processes and its leakage current.

9 THE K-WEAK MINIMAL CUT SET OF NETWORKS AND FAST SEARCHING ALGORITHM

Chen Hua Zhou Jiaqi

1989, 12(6):55-61.

[Abstract](696) [HTML](0) [PDF 339.76 K](241)

Abstract:
A new concept dafincd as k-weak minimal cut set, which, is used to characterize the weakness of the weak link set, is established in this paper. Based on this concept, a fast algcrithm or searching k-weak minimal cut set in large scale networks is proposed. From the analysis of computation complexity, it is shown that the frequency count of the algorithm is much lower and the algorithm is powerful to adequacy evaluation of the transmission capacity in large scale networks.

10 VALENT ANELYS1S OF VANADIUM IN VANADIUM''''S SLAG TREATED WITH SODIUM

Dai Dayu Guo Mingmo Xu Mingxi Luo Yongjie Yi Guihua

1989, 12(6):62-29.

[Abstract](717) [HTML](0) [PDF 392.89 K](175)

Abstract:
钠化钒渣是含Fe(Ⅱ、Ⅲ)、V(Ⅲ、Ⅳ、Ⅴ)、Ti(Ⅲ、Ⅳ)等多种元素多种价态的试样。本文拟定了这种复杂试样中钒的价态分离与测定的程序和方法,获得了满意的结果。

11 THE X-RAY DIFFRACTION ANALYSIS OF PURE IRON AGED AFTER ION-NITRIDING

Zhou Shangqi Zhang Jin

1989, 12(6):70-74.

[Abstract](506) [HTML](0) [PDF 246.47 K](141)

Abstract:
用x射线衍射发现,工业纯铁氮化后时效将引起ε→α″→γ′转变,ε相具有调幅结构。该结果为化合物层时效强化找到了理论依据。

12 INVESTIGATION OF COLOR CENTERS IN Nd~(3+): YAG CRYSTALS GROWING IN GRAPHITE RESISTANCE FURNACES

Zhou Shangzhang Xu Zhongmin

1989, 12(6):75-80.

[Abstract](678) [HTML](0) [PDF 335.55 K](119)

Abstract:
BY impurity analysis of crystal materials, and with systematiacl experiments of optical absorption, annealing treatment and ultraviolet light irradiation of the crystals, the mechanism of color centers in Nd3+:YAG crystals growing in graphite resistance furnace is investigated.

13 APPROXIMATION OF INVOLUTE PROFILE BY PEACH-SHAPED RING SECTION

ZhaoXuejun LiPingyuan

1989, 12(6):81-87.

[Abstract](536) [HTML](0) [PDF 141.13 K](148)

Abstract:
By using the least pth min-max method, we find the best approximation of involute ptofile by peach-shaped ring section. The error of approximation is less than that of [ 1 ] and [2]. Thus we provide a new direction for dressing of a wheel for involute gear forming-grinding. In order to simplify calculation, we define the error function according to implicit equation of curve and as a result its rationalization is proved.

14 THE GENERALIZED NEWTON ITERATIVE PROCEDURE

Yang To

1989, 12(6):96-102.

[Abstract](383) [HTML](0) [PDF 213.26 K](678)

Abstract:
We suggest a class of generalized Newton method in this paper. As special exampls, it contains the usual Chebyshev method, tangent-hypobolic method and steepest descent method.

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