最新刊期
卷 ， 期 8 ， 1996
- 摘要：This paper introduces the function of amorphous state Al2O3 electron transmission film at the input of MCP in the imaging devices, expounds the selection, forming condition and method of the film,gives the relation between film forming and glow discharge of the gases. Some characteristics of the film and MCP with film are measured. Preliminary analysis and discussion about it are carried out.关键词：microchannel plate;electron transmission film;Ion backfeed;Intensifier2|121|26更新时间：2025-12-08
- 摘要：The general Y parameters and small signal equivalent circuits are established and the concept of frequency dependence resistance, frequency dependence capacitance and frequency dependence conductance are developed based on the general small signal transmission line model of superconducting field effect devices in the previous paper. It provides the strong base for the investigation of the high frequency characteristics and dynamics of superconducting field effect devices.关键词：General Y parameters;Small signal equivalent circuits;Circuit configuration2|39|0更新时间：2025-12-08
- 摘要：The defect spatial distributions on the wafer of IC’ s are studied. Based on the research of the spatial cluster effect of defect,a novel number-fractional dimension for describing the defect spatial distributions is proposed and a constructive fractal model is obtained. The defect spatial distributions and cluster are analysed in detail and simulated by means of the fractal model,and the correct results are given. The model can express the functional yield accurately and lay the foundation of design for manufacturability of IC’s.关键词：Defect spatial distributions;Cluster effect;Fractional dimension;Functional yiedl2|96|6更新时间：2025-12-08
- 摘要：The microstructures and micro-defects in laser-recrystallization SOI （Silicon on Insulator） with reflecting-stripe structure have been studied using plane-view and cross-section electron microscopy. The experimental results indicate that the silicon film laser-recrystallized under the normal processing conditions can be divided into three distinct regions:monocrystal with [100] orientation in the middle of the melted zone ,recrystallized large grains in the both sides of the monocrystal and polycrystal zone in the most outside side. When the processing is not proper, subgrain boundaries and large angle grain boundaries appear in "monocrystal region"; 180°microtwins arrayed regularly on both sides of the "monocrystal region" can be observed sometimes, and their twin planes are {111}. The orientations of the large grains are not regular. The polycrystal region consists of columnar grains with obvious texture. The cause of the defect formation is also discussed in this paper.关键词：Silicon-on-insulator;Laser-recrystallization;Microstructure;Micro-defects3|35|0更新时间：2025-12-08
- 摘要：A unified spectral analysis method using pulsed MOS C-t characteristics has been presented in the paper, which can be used to determine the minority carrier generation lifetime. This method is based on an idea that any kind of convergent relaxation process can be expressed as the damped exponential function. Here we put forward a new method with the difference sampling principle, from the transient capacitance difference spectroscopy, we can directly get the information about the minority carrier generation lifetime. We investigated some currently accepted models for the minority carrier generation lifetime, made a comparison with these different models, and found that their maximum difference is less than 10%.关键词：Minority carrier lifetime;Pulsed MOS structure;Difference sampling;Transient capacitance difference spectroscopy2|28|1更新时间：2025-12-08
- 摘要：At present, the context free grammar and the pushdown automaton are the usually used formal systems in research for context free languages, correspondently, the regular grammar and the finite automaton are usually used in research for regular languages. The correspondency between the symbols in regular grammar and the symbols in finite automaton is relatively evident. In other words,it is easier to transform one to the other between these two systems,and people may have a more accordant comprehension when they observe the characteristics of a language in these two systems. But the correspondency between context free grammar and pushdown automaton is not so evident as that between regular grammar and finite automaton. The infinite state automaton introduced in this paper is also a kind of recognizing system for context free languages, however, there is also an evident correspondency between context free grammar and infinite state automaton similar to that between regular grammar and finite antomaton, thus bringing the benefits to the research of context free languages.关键词：Regular grammar;Context free grammar;Finite automaton;pushdown automaton;Infinite state automaton;Generating system;Recognizing system3|462|20更新时间：2025-12-08
- 摘要：A max-min criterion for design of bidirectional associative memory, which requires the smallest domain of attraction to be maximized, is proposed in this paper. A quick learning algorithm is first given, by which the designed connection weights are 1,0 or -1. Further, a constrained perceptron optimization algorithm is presented, which takes the weights obtained by quick algorithm as initial iteration value. Computer experimental results confirm the advantages of the proposed algorithms.关键词：Bidirectional associative memory;Max-Min criterion;Quick learning algorithm;Constrained perceptron optimization algorithm2|58|1更新时间：2025-12-08
- 摘要：A new texture segmentation method based on visual perception and phase feature is proposed. The algorithm is composed of three main parts : orientational filter designing,local unwrapped phase extracting and variable pyramid segmentation. Some typical simulating experiments are given to show the correctness and validity of the method.关键词：texture;segmentation;Orientational filtering;Phase wrapping;phase unwrapping;Pyramid2|123|6更新时间：2025-12-08
- 摘要：Based on the carrier transportation equations of each subcell and equivalent series connection theory ,a method of modeling the J-V. characteristics of multijunction solar cells is presented. With the computed results ,the effects of P/I interface state and band-gap gradient of P/I buffer layer on the photoelectronic performance of Glass/TCO/a-Si/a-Si/Al tandem cells are analysed. The estimated performance and advantages of Glass/TCO/a-Si/a-Si/a-SiGe/Al triple cells are also presented.关键词：多结太阳电池;模拟分析;界面态;带隙梯度;光电特性2|115|0更新时间：2025-12-08
- 摘要：The optical processes of alkali antimonide photocathodes are investigated. Based on the similarity of structure between the antifluoride and alkali antimonide, the possible transitions taking place in the Brillouin zone corresponding to the structure in the optical spectra are identified for Na2KSb（Cs）,Css3Sb and K2CsSb cathode. It is found that the optical transition of Na2KSb（Cs） is similar to that of crystalline film and Cs3Sb and K2CsSb are similar to amorphous film. The peak arising from the contribution of Δ and Σ direction in Na2KSb（Cs） isn’t observed in Cs3Sb and K2CsSb. We explain the transformation from nondirect transition to direct transition which takes place in alkali antimonides and draw a conclusion that nondirect transition in which momentum K conservation doesn’t play an important rule in optical transition due to disorder remains in the polycrystalline film with some degree of disorder. The multialkali effect is also explained.关键词：Amorphouslike model;Alkali antimonide photocathodes;Multialkali effect;Nondirect transition2|45|0更新时间：2025-12-08
- 摘要：The transmission characteristics of DBR structure on LiNbO3 optical waveguide having loss are analysed by means of equivalent waveguide grating’s F-p cavity method. The design of electro-optic intensity modulator and electrical tunable frequency demultiplexer is presented by using this structure.关键词：Optical waveguide;Electrical modulation;Frequency demultiplexer2|42|0更新时间：2025-12-08
- 摘要：This paper presents a two-dimensional numerical analysis method and program for self-aligned GaAs MESFET.by using finite-differential method. For different n￣+depth, the distributions of potential, electric field and carrier concentration along the channel and the current-voltage characteristic curve are studied. The results show that the deeper the n￣+ implanted depth, the bigger will the domain be. Reasonable Lgs and Lgd will improve the device breakdown voltage.关键词：Device modelling;Self-aligned GaAs FET’s2|31|0更新时间：2025-12-08
- 摘要：Based on the detailed analysis of low temperature bipolar device and its parameters,D.C. and transient characteristics of low temperature ECL circuit are studied theoretically and experimentally. Then the optimization for such circuit is suggested.关键词：ECL circuit;,Low temperature;D.C.;Transient;optimization2|32|0更新时间：2025-12-08
- 摘要：This thesis breaks up the traditional constraints of Channel Model,builds a new layout model-superplane model. The new model can explore the nature of multilayer layout better than ever. Based on this new nodel,the routing has been studied emphatically and the superplane routing algorithm has been created simultaneously. The "rode" technique has been proposed for solving the net order very successfully and all nets can be routed parallely. By directly aiming at the minimum number of routing layer and via dynamically distinguishing the related position of nets,and with global view of releasing the unreasonable resources owned by net, iteration has been avoided in the routing and precise results have been obtained efficiently.关键词：Superplane routing;routing;Layout ICCAD2|20|0更新时间：2025-12-08
- 摘要：A concept of circuit functional level test generation within stuck-at fault model and a method of functional level test generation with Critical Binary Tree（CBT） are described. A novel method about critical input dynamic identification is presented. So we may obtain smaller CBT and accelerate the process of test generation.关键词：Critical binary tree;combinational circuit;Functional level test generation2|24|0更新时间：2025-12-08
- 摘要：An optimization-based synthesis method for analog circuits is proposed. The simulated annealing algorithm（SA） is employed to do topology selection and device sizing simultaneously,which overcomes the shortage of the traditional two-step synthesis mode. Moreover,an iteration strategy is composed to reduce the computational cost of SA. Taking this methodology,a synthesizer is developed which performs well in synthesizing many analog cells, such as simple amplifiers, current mirrors, operational amplifiers, analog multipliers and switched-power controllers, etc.关键词：Design automation for analog IC;IC CAD;optimization3|46|3更新时间：2025-12-08
- 摘要：A kind of real-time processing algorithm for RLS（Recusive Least-Squares） adaptive filter is proposed which is very suitable for VLSI implementation. All the operations needed in the algorithm are mapped into a systolic array which is constituted by only CORDIC units. The least-square residue can be directily deduced from the array without solving the complex weights.And a full-custom 90,000 transistor ASIC for this array has been designed and manufactured with 1.2μm CMOS technology, with which a adaptive filter can be built with data sample rate of 2MHz.关键词：数字信号处理;自适应滤波;递推最小二乘算法;超大规模集成电路;脉动阵列;CORDIC2|141|5更新时间：2025-12-08
- 摘要：This paper applies the fuzzy control theory to high resolution spatial spectrum estimation direction-finding（DF） , presents an improvement method of the MUSIC algorithm,called Fuzzy-MUSIC algorithm to slove high resolution DF problem in the environment of short data and low SNR. The simulated results with the system developed on the simulator TMS 320C30.关键词：High resolution spatial spectrum estimation;fuzzy control;Direction-Finding2|158|1更新时间：2025-12-08
- 摘要：The convergence, robustness, optimum and computing speed of Hopfield-Tank are analyzed, then, on the basis of external penalty function, a new algorithm-variant parameter neural network algorithm based on Hopfield-Tank model is proposed.The TSP’s energy function is also improved, and according to the numerical experiment for the TSP Of 31 cities of our country,the shortest route（15640km） is obtained.In the aspects of convergence, robustness, optimum and computing speed, the algorithm is satisfactory.关键词：Hopfield-Tank model;External penalty function method;TSP2|92|13更新时间：2025-12-08
- 摘要：In this paper,a kind of symbolic neural network structure is presented according to the research of neuron structure is presented according to the research of neuron science and cognitive science and a learning algorithm of symbolic neural network is researched. This algorithm the combines the BP learning algorithm of neural network with the learning algorithm of symbolic mechanism. At last,the efficiency and advantage of the learning algorithm is proved through experiments.关键词：artificial intelligence;neural network;learning algorithm;hybrid system2|63|3更新时间：2025-12-08
- 摘要：For a robot equipped with various sensors,the control system should be capable of integrating data from different sensors into a precise representation of expected objects,With the data processing architecture for sensor-fusion being analysed ,a two-level-fusion system is presented and its experiment for object identification is described.关键词：multi-sensor;Information fusion;robot2|248|40更新时间：2025-12-08
- 摘要：ＭＲＱ－ＭＣＢＷＢ──一种改善ＤＱＤＢ协议公平性的新方法温燕红，王耀中（上海交通大学图像所，上海２０００３０）分布式排队双总线（ＤＱＤＢ）协议已被ＩＥＥＥ８０２委员会采纳作为ＩＥＥＥ８０２．６城域网媒质接入控制协议的标准，其主要特点是媒质接入控制机制...2|18|0更新时间：2025-12-08
- 摘要：This paper presents a general algorithm for multi-way digital circuit partitioning.It can be applied to different optimizatiom functions. Based on the general net cut model. a well designed discrete penalty function is incorporated into the original cost functions to take consideration of the potential interaction between free cell’s exchange. Experimental results show that not only the proposed algorithm outperforms the multi-way version of F-M’s slgorithm,but also the erratic defect of F-M’s algorithm is reduced in part. Since we adopt the improved bucket sorting techniques,the algorithm remains the linear time complexity that F-M’s algorithm had achieved and thus can be applied to partition VLSI and ULSI circuits.关键词：Cost function;Potential gain;Min-cut;NP-complete2|39|4更新时间：2025-12-08
- 摘要：This paper discusses issues in the design and implementation of a language named DC++（distributed C++）. The language is upward-compatible to C++,and its basic building block is process,a class with its own thread of control. DC++ supports both the synchronous and asynchronous communication models and provides the programmer with various facilities for process communication purposes. The group concept allows the programmer to consider a collection of processes as a unique entity,and provides an interface between them and the outside world.关键词：Distributed computer system;Object-oriented program design;Process class2|32|2更新时间：2025-12-08
- 摘要：A new self-organizing controller using fuzzy neural networks and fast Kalman learning algorithm are presented. The simulation results and temperature control show that the new intelligent controller gives more significant performance and robustness than conventional fuzzy approaches.关键词：fuzzy neural network;learning algorithm;intelligent control2|136|14更新时间：2025-12-08
- 摘要：As the development of VLSI design, the target of the technology mapping has been changed into minimizing area under delay constraint from area optimization. However,there exist only near optimal algorithms for the target up to now. This paper presents a theoretical breakthrough showing that the technology mapping problem for Area Optimization under Delay Constraint can be solved optimally by our algorithm.关键词：Electronic CAD;technology mapping;Timing analysis2|23|2更新时间：2025-12-08
- 摘要：The physical mechanism of g-r noise induced by deep-level defects in the emitter space-charge region for bipolar transistors is analyzed quantitatively and a new model on g-r noise in bipolar transistors is developed. The experimental dependence of g-r noise on the bias voltage is explained from the model. Based on the model,the deep-level parameters in bipolar devices are determined by means of g-r noise measurement.关键词：g-r noise;Bipolar transistor;Deep-level2|73|2更新时间：2025-12-08
- 摘要：Based on silicon direct bonding（SDB） technology, a self-sealed micro diode with low vacuum is fabricated for the first time. The experiments show that the starting voltage of the diode is about 5 Volts,and the total emission current may reach 10￣（-4） A at about 25 V. The formation mechanisms of vacuum within the sealed cavity are also analyzed in detail.关键词：Vacuum microelectronics;Self-sealed diode;Silicon direct bonding2|35|2更新时间：2025-12-08
- 摘要：The inverse operator method（IOM） is a new nonnumerical method for solving the strongly nonlinear problems. It is used to analyze linearly graded p-n junctions. The analysis problems are formulated as one-dimensional nonlinear Poisson’ s equations, and the IOM is used to solve these strongly nonlinear ordinary differential equations. By using the symbolic calculus software （Mathematica）,the approximate analytic solutions are calculated. Also ,the error analysis for these approximate solutions is carried out. The simulated results are accurate and reliable,which has realized the quantitative analysis of linearly graded p-n junctions and will contribute to making a thorough study of p-n junctions. Our research results indicate that the IOM has some advantages,and that it will open up a new way for the numerical analysis of semiconductor devices.关键词：Inverse operator method;Linearly graded p-n junction;One-dimensional nonlinear Poisson’s equation;analysis2|57|1更新时间：2025-12-08
- 摘要：An equivalent time-domain linear network model is obtained for multiconductor transmission lines with nonzero initial voltage and current distributions by combining Fourier and Laplace transforms. The transmission lines may be lossy non-uniform ones. The model can be embedded in a circuit simulator such as SPICE, so nonlinear terminal loads can be treated. One example of transient analysis using the model is given.关键词：Transmission line model;Nonzero initial distributions;Equivalent current sources2|114|5更新时间：2025-12-08
- 摘要：Ｘ、Ｌ波段低噪声参考源陈捷平，段泽群，朱君范（成都电子科技大学微波中心，成都６１００５４）一、引言由于低相噪频率源在雷达、导航、通信以及测试仪器中的广泛用途，凡是研制、生产微波频率源的单位都把降低信号源的相位噪声作为首要攻克的难题．我们利用自己研制的...2|39|0更新时间：2025-12-08
- 摘要：基于新型电流模式积分器的全集成滤波器ＦｕｌｌｙＩｎｔｅｇｒａｔｅｄＦｉｌｔｅｒｓＢａｓｅｄｏｎＡＮｏｖｅｌＣｕｒｒｅｎｔＭｏｄｅＩｎｔｅｇｒａｔｏｒ￥／／赵录怀，邱关源（西安交通大学电气工程学院，西安７１００４９）积分器电路如图１所示，图中ｉｐ和ｉｎ...6|56|1更新时间：2025-12-08
- 摘要：低损耗宽带高通滤波器ＢｒｏａｄｂａｎｄＨｉｇｈｐａｓｓＦｉｌｔｅｒｗｉｔｈＥｘｔｒａＬｏｗＬｏｓｓ￥／／赵清明，张青（西南电子电信技术研究所，成都６１００４１）在某些微波信号接收设备中为了抑制干扰信号，需要在天线馈源后面接一高通滤波器，这就要求该滤波...2|202|2更新时间：2025-12-08
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