最新刊期

    1 1983
    • 献计献策 开创电子科技事业新局面

      Issue 1, Pages: 1-6(1983)
      摘要:<正> 中国电子学会于1982年10月15~18日及20~23日相继召开了她的第三届学术年会和第二届理事会第二次会议。到会专家在党的十二大精神鼓舞下,就如何使电子科学技术适应我国四化建设需要这个主题,在他们的论文中或座谈讨论中,提出了许多富有启发性的见解与建议。为使我国电子学界广大科技工作者和技术指挥人员都来关心这件关系到新时期总任务如何实现的大事,本刊特摘编其中的一部分加以发表,以求集思广益。但由于本刊篇幅十分有限,以致未能将更多的内容介绍出来,编者特先致歉意。  
        
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    • 中国电子学会第二届理事会第二次会议记实

      Issue 1, Pages: 7-8(1983)
      摘要:<正> 中国电子学会第二届理事会第二次会议于1982年10月20日至23日在南京市召开。到会的理事共有132名。大会在常务理事会的领导下,由理事长刘寅,副理事长朱物华、蔡金涛、卢宗澄、孙俊人主持始终。  
        
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    • Issue 1, Pages: 9-12(1983)
      摘要:<正> 1982年10月15—18日,中国电子学会为了纪念她成立二十周年,在古城南京举行了第三届年会。这是三十个分支学科开展横向智力协作的一次盛会,是我国电子学界学习、宣传和贯彻党的十二大精神的动员大会。 会议期间共交流了264篇论文。在这些论文作者中,30~49岁的科技人员占总数的66%  
        
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    • Network Extension Theory and Feedback Circuit Analysis

      Zou Mou-yan
      Issue 1, Pages: 13-26(1983)
      摘要:The network extension theory and its applications for analysis of circuits are introduced. Developed just in recent years, the theory deals chiefly with the properties of networks when some changes in their construction take place, providing a new approach for circuit analysis. The approach is efficient especially for the treatment of modifications and connections of networks and for the generation of symbolic network functions of large scale networks. Some practical techniques are discussed in detail. Several examples of the approach are given to show its efficiency and simplicity.  
        
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    • 全国数字系统设计自动化学术交流会在明昆召开

      Issue 1, Pages: 26(1983)
      摘要:<正> 去年九月在昆明召开了全国数字系统设计自动化(DA)第二次学术交流会。收到论文102篇,内容涉及系统及DA数据库、各级模拟、故障诊断与测试、自动逻辑综合以及实体设计等DA领域的各个方面。来  
        
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    • Liang Chang-hong
      Issue 1, Pages: 27-35(1983)
      摘要:By using the method of equivalent magnetic current together with Bethe’s theory of small aperture coupling, a pratical method is presented to solve small aperture coupling between dissimilar regions. Simple generalized equivalent networks are given for several typical examples.By connecting any two of them, coupling between two corresponding regions can be formulated.  
        
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    • Advances in the Concept of Generalized Reflection Coefficient

      Tang Jia-ming
      Issue 1, Pages: 36-40(1983)
      摘要:This paper analysis the conjugate match circuit of the. two-port network and n-port generalized reflectometer by means of the pair of conjugate match network.The appropriate measurement methods have been established on the analysis results. The concept of the generalized reflection coefficient can be used to measure the intrinsic parameters and the circuit parameters of the one-port and two-port elements.  
        
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    • Small-Signal Theory of the Severed Injected-Beam Crossed-Field Amplifier

      Zhang Ke-qian
      Issue 1, Pages: 41-48(1983)
      摘要:A physical model and related formulas for the calculation of small-signal gain and phase shift in a severed injected-beam crossed-field amplifier are presented in this paper. The analysis is based on the linear theory of thin beam CFA with the space charge effect included. In the analysis the space charge effect as well as the circuit loss and the velocity difference between electrons and undisturbed waves are considered."Sever Drop"and "Sever Phase Shift" are introduced in formulas to represent the effect of the sever.The"Sever Drop"can be of a negative value due to the Diocotron effect in the sever. The influence of sever location on the gain is also analyzed based on a zero-length sever model.  
        
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    • H-Algorithm for Test Generation of Asynchronous Circuits

      Ruan Gen-hong
      Issue 1, Pages: 49-57(1983)
      摘要:On the basis of the six-valued logic system, an H-algorithm is suggested for the test generation of asynchronous sequential circuits. A comparison between the H-algorithm and the nine-valued algorithm is made. It is shown that the H-algorithm guarantees the validity of the obtained test sequence and keeps the sequence free from race condition.  
        
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    • Discussion on Decision Feedback-Feedforward Equalizers

      Chen Chi-wen
      Issue 1, Pages: 58-65(1983)
      摘要:A new conception of Decision Feedback-feedforward Equalizer (DFFE) is proposed. Two types of optimum receivers derived under MMSE criterion with and without ZF constraint are described, and their tap adjustment algorithms are also given. An upper bound on the error probability in DFFE with ZF constraint is derived. It is proved that either with or without ZF constraint, the error probability in DFFE is lower than in DFE. Computer simulation shows that the adaptive scheme is feasible.For simple implementation, the preequalizer may be omitted in DFFE. Convergence is then independent of channel parameters, and the number of its taps is reduced to a minimum.  
        
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    • Coupling-Wave Theory on Latching Variable Polarizers

      Jiang Ren-pei, Wei Ke-zhu, Li Shi-gen
      Issue 1, Pages: 66-72(1983)
      摘要:Both nonreciprocal birefringent effect and variable polarization effect of microwave ferrite in the symmetrical four-pole magnetized field are discussed in the light of coupling-wave theory. A concept of the tensor permeability in the multicenter-magnetized inho-mogeneous magnetized systems in a latching state is proposed. Two methods of variable polarization are discussed, and some formulae for wave-mode differential phase, nonreciprocal phase and variable polarization coefficient are deduced. The experimental results are in good agreement with the theoretical calculations.  
        
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    • General Transmission Matrix

      Lin Shou-yuan
      Issue 1, Pages: 73-78(1983)
      摘要:Based on the generalized inverse matrix, a group of definitions are given for general transmission matrix. It is pointed out that the general transmission matrix has itsadvantages and limitations in analyzing the cascade of conventional multiport--non-2m-port--networks.  
        
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    • A Study of the Formation of Swirl Defects in P-type CZ Si Crystal

      Sheng Zhen-ming, Qin Fu, Wan Qun
      Issue 1, Pages: 79-83(1983)
      摘要:The factors which may have influence upon the formation of swirl defects in P-type <100>, <111> CZ Si crystal were studied. It was found that the cooling rate of the grown crystals is critical for the formation of swirl defects. The oxygen content in the range of 0.5-1.7×10(18)/cm3, and the carbon content in the range of 0.2-1.9×10(17)cm3 have no obvious effect on the formation of swirl defects. Though serious remelt had been observed when the distance between crystal axis and crucible axis became 8mm, yet it is still possible to obtain swirlfree crystals by adopting proper cooling rate.  
        
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    • 第二届全国三束及超精细加工年会在常州召开

      Issue 1, Pages: 83(1983)
      摘要:<正> 由中国电子学会生产技术学会、半导体与集成技术学会联合召开的第二届全国电子束、离子束、光子束及超精细加工学术年会于1982年10月27日至11月1日在常州举行。来自全国各地95个单位的282名代表参加了这次会议。会上共有174篇论文分别在6个专业组上宣读,另有51篇论文进行书面交流。美国橡树岭国家实验室B.R.Applton博士应邀到会作了半导体离子注入及激光退火的专题报告。  
        
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    • Wang En-ju
      Issue 1, Pages: 84-90(1983)
      摘要:The decision-making method for product development based on statistico-analysis of historical data is discussed. It consists of identifying the main factors influencing the results of product development, calculating the probabilities of those influences on product development and by way of weighted assessment, deriving the minimum development decision value for the genus of products and determining the actual decision value of the product in question belonging to the genus. If the value of the product under consideration is found to be greater than the minimum value required for its genus, the product can be developed. For products without historical data, this paper gives the minimum decision values based on normal distribution law and practical experience. This method has proved very useful in the development of consumer electronic products.  
        
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    • An Introduction to program Transformations

      Fan Zhe-min
      Issue 1, Pages: 91-103(1983)
      摘要:This paper reviews the evolution of programming notions, gives a systematic and comprehensive description of basic concepts, principles and techniques of program transformations, and puts forward some suggestions for the implementation of a program trans-ormation system.  
        
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    • 建议大力发展电子敏感元件

      Issue 1, Pages: 103(1983)
      摘要:<正> 一九八二年十二月二日至五日,电子工业部科学技术委员会元件组在北京召开了“敏感元件发展建议咨询会议”,来自46个单位的56名代表出席了会议。中国电子学会电子元件学会主任委员、电子工业部科学技术委员会元件组组长陈克恭同志组织和领导了这次会议的筹备工作。  
        
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    • CW CO2 Laser Alloying of Au-Ge-Ni Ohmic Contacts on n-GaAs

      Zou Shi-chang, Wang Wei-yuan, Lin Cheng-lu, Xia Guan-qun
      Issue 1, Pages: 104-106(1983)
      摘要:Backside irradiation through the substrate with a CW CO2 laser has been used to produce Au-Ge-Ni ohmic contacts on n-GaAs with different doping concentrations(6×10(14)-7×10(17)cm-3).The laser alloyed contacts show better ohmic behavior and a contact resistance lower than that of furnace alloyed contacts by approximately an order of magnitude for low bulk concentrations(5×10(18)cm-3).The formation of a Ge-enri-ched n-type GaAs layer after laser alloying, as shown by the results of AES analysis, is helpful to improve the interface properties of the contacts.  
        
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    • An Approach for Distinguish the Mode of Dielectric Waveguide

      Zhang Xue-xia
      Issue 1, Pages: 107-108(1983)
      摘要:An approach to distinguish the modes of dielectric waveguides with various cross sections is described.  
        
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    • On Analysing the Transient Process in LC Sinusoidal Oscillator

      Huang Bing-hua
      Issue 1, Pages: 109-112(1983)
      摘要:It is usually observed that the conditions of self-excitation of LC sinusoidal oscillator are: (l)arg KF=±2nπ, (2)k =|KF|=(βM/rbcCR)≥1. Tnis paper points out that the above conclusion is not totally right.  
        
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