最新刊期
卷 ， 期 2 ， 1992
- 摘要：In this paper, we present a new placement algorithm with multiple target shapes. It includes the creation of the clustering tree, the generation of the multiple target shapes, the selection for the objective functions, the placement scheme and its contribution to BBL （building block layout） placement. The approach was programmed by C language on SUN, HP, GPX and VAX in 1989. It is a sub-system of PANDA. Some examples （total 33） from industrial and our benchmark are tested. The solutions are very encouraging in comparison with the ones of BEAR developed by U.C. Berkeley.关键词：VLSI and ULSI;Layout design automation;Placement and routing;Clustering with selectable target shapes;Building Block Layout;Slicing structure2|28|3更新时间：2025-12-08
- 摘要：We have studied the problem of election and fuzzy quantification of the performance measure sets of a fuzzy control system. But the self-assumption of the control rules is still a question. This paper presents a new algorithm with regulating the control rules directly from the control decision table. This algorithm can solve the problem of self-modification and self-generation of the fuzzy control rules. It is shown that the algorithm is simple and applicable from software simulation.关键词：fuzzy;Control rules;Self-organizing;decision table;Performace measurement2|95|6更新时间：2025-12-08
- 摘要：<正> 清华大学微电子所已初步建成了国内第一条1—1.5微米CMOS VLSI电路（超大规模集成电路）芯片工艺研制线,独立地开发成功了1.5微米设计规范的CMOS VLSI电路成套工艺技术。这一套工艺在研制1兆位汉字只读存贮器中得到了充分的验证。 成套工艺技术包括各项工艺条件摸索,工艺流程的设计和检测方法的确定。突破主要关键工艺包括微细线条曝光,显影,全正胶刻蚀,图形形貌的精度控制,细线条测量,高质量薄栅氧形成,离子注入技术,线结低温工艺,铝硅铜溅射工艺,硼磷硅玻璃等。2|26|0更新时间：2025-12-08
- 摘要：In this paper, the principle of the electromagnetic simulation is outlined, a direct-picking method is presented for determining the circuit characteristics, and two kinds of matrix-order-reduced approach are studied. All of these resulted in a fast electromagnetic simulation technique for MMIC’s, which can reduce computing time by about one order of magnitude. Two simulation examples show that the technique is very effective.关键词：Monolithic Microwave Integrated Circuit（MMIC）;Electromagnetic simulation2|57|1更新时间：2025-12-08
- 摘要：<正> 七十年代以来,由集成运算放大器构成的RC有源滤波器得到了广泛的应用,但其精度和稳定性不理想,而且调试麻烦。近年来发展起来的集成开关电容滤波器体积小、重量轻、精度高、稳定性好,而且使用方便。由清华大学微电子所正向设计并研制成功的专用集成电路CFBP3就具有上述的优点。它的另一突出优点是改变输入时钟频率就可以改变带通滤波器的中心频率,无需进行元器件的调整,这给使用带来了很大的方便。2|51|0更新时间：2025-12-08
- 摘要：Field-enhanced a-Si:H photoemitter is designed. The device is a SnO2--n-p a-Si:H--Al:Cs:O structure which incorporates a low work-function surface in n-p a-Si:H with charge amplification effect to give an increased photoelectron yield. Experimental demostration of photoemission from a-Si:H in this mode is reported. The photoelectron yield is 2.1% at 0.56μm wavelength and the long-wavelength cutoff is 0.82μm. Problems in the experiment and the method of obtaining high quantum efficiency are discussed.关键词：Photemitter;Amorphous silicon;Drift electric field;Demountable vacuum system;Quantum efficiency2|31|1更新时间：2025-12-08
- 摘要：A new type of titration system, ISFET--coulometric titration system, is proposed. The basic performances of the system have been tested and evaluated. The experimental results have shown the excellent stability and repeatability of the new system. The equivalent average drift of the measuring system is about 2 orders less than that of the best pH-ISFET. The applicability and adaptability of the pH-ISFET in the system as well as the miniaturization of the reference electrode are also discussed.关键词：ISFET;Coulometric titration2|25|0更新时间：2025-12-08
- 摘要：We have developed a Ti/TiW/Au gate metallization technique, which can be used for the compatible co-integration of GaAs IC and Si IC. By utilizing Ti/TiW/Au gate metallization, we have obtained good MESFET’s and IC’s performances of GaAs grown on-Si substrate by molecular beam epitaxy.关键词：GaAs/Si compatibility;Ti/TiW/Au contact and interconnect;MBE hetero epitaxy2|49|0更新时间：2025-12-08
- 摘要：A new structure of gas sensor is presented in this paper. The new type of gas sensor is composed of gas sensing part and a special load resistance as a whole element. Thus, the output of this element can be obtained easily without outer sample resistance. The thermal stability of existing gas sensors and new type of gas sensors are analysed theoretically and experimentally. The results show that the new type of structure element has better thermal stability. Here, only the results of ethanol sensors are reported, but this structure is applicable to other kinds of semiconductor gas sensors.关键词：Gas sensor;thermal stability;optimum design4|33|3更新时间：2025-12-08
- 摘要：This paper discusses an efficient parallel algorithm of Winograd Fourier transform which is implemented on Transputer Multiprocessor system. It is characterized by high efficiency of parallel computing and good load balance between processors.关键词：parallel algorithm;Winograd Fourier transform;load balance2|88|0更新时间：2025-12-08
- 摘要：In this paper, a MIMD parallel algorithm for computing one-dimensional Walsh transform as given. It has N1/2 times speed-up over fast serial algorithm and 100% processor efficiency when transform length is N and N1/2 processors are available.关键词：Image encoding;Walsh transform;parallel algorithm4|22|3更新时间：2025-12-08
- 摘要：The paper analyses some task scheduling strategies in distributed computer systems in the world, and describes the heuristic dynamic task scheduling algorithm used in Cube Distributed Computer Operating System （CDCOS）. The operation of the scheduling algorithm and CDCOS is successful.关键词：概率计算法;梯度招标法;上下门槛2|37|1更新时间：2025-12-08
- 摘要：A new algorithm for optical flow computation is presented using neural networks. The computation procedure consists of three stages: estimation of the parameters of the neural network model, dynamic measurement of the perpendicular velocity components of the contour and optical flow computation. The parameters are estimated by comparing the energy function of the neural network with a constrained error function of motion. The nonlinear optical flow computation method is then carried out iteratively by using a dynamic algorithm to minimize the energy function simultaneously with the dynamic measurement of the perpendicular velocity components by a dynamic procedure. Some factors affecting the convergence property of the neural network are discussed through the simulation results.关键词：neural network;optical flow;Visual motion2|70|0更新时间：2025-12-08
- 摘要：<正> 由西安电子科技大学承担的国防科工委“七·五”科技应用基础研究重点项目——“人机界面信息技术研究”于1991年5月在西安电子科技大学通过了由机械电子工业部组织的鉴定。这项研究成果得到了与会专家的高度评价。 该项目的研究在国内是首次开展,不仅对提高各种电子武器系统中人机界面视觉信息交互功能具有重要意义,而且在计算视觉理论研究和工业自动化新领域的应用也有着明显的价值。西安电子科技2|18|0更新时间：2025-12-08
- 摘要：In this paper, we have shown that for one-dimensional finite length real sequence, input x（n） and unit impulse response y（n） can be almost uniquely defined by the magnitude spectrum of x（n） （or y（n）） and output z（n）. We have also shown that using given multichannel recording, z1, x（n） and y1（n） can also be almost uniquely reconstructed. Four theorems on the uniqueness of semi-blind deconvolution are given.关键词：Semi-blined deconvolution;Finite energy sequence;Magnitude spectrum;Multichannel2|27|1更新时间：2025-12-08
- 摘要：This paper describes the structure and design principles of a pulse Gunn diode, a microwave circuit and a pulse modulator. The results of research on pulse Gunn oscillator are given: the maximum pulse power of 5.7W, highest efficiency of 5%, pulse duration ratio of 1% over 1315GHz band.关键词：Ku-band;Pulse Gunn diode;oscillator;microwave circuit;modulator2|31|1更新时间：2025-12-08
- 摘要：In this paper, an optimal method to control numerical oscillation in streamlne direction is proposed, which exhibits better properties in preclusion of numerical oscillation and crosswind effects in comparison with the classical Scharfetter-Gummel method and SUPG method.关键词：Numerical oscillation;Crosswind effect;control;Convection-diffusion equation2|25|0更新时间：2025-12-08
- 摘要：A regular carry look-ahead adder is presented in this paper. It gains very short delay proportional to logarithm of the bandwidth of the adder, regular architecture, simple logic and localized in-terconnectivity. SPICE simulation results show that for a 16-bit RCLA employing 2UUUUUUUUUm CMOS technology the addition time is 5.4ns in the worst case, and doubling the bandwidth only takes 1.2ns more delay. It can conveniently be implemented by various VLSI design styles, e. g. full-custom, cell based or gate array.关键词：adder;MFCC;CLA2|106|0更新时间：2025-12-08
- 摘要：An optimum design for the temperature-sensitive probe is proposed, based on the analyses of the principle of the modified cladding fiber optic sensor and the constitution of the sensing head. With the introduction of microprocessor for signal processing, the temperature sensitivity, automatic display and control performances of the system are greatly improved.关键词：Microprocessed;Fiber-optic thermometer.2|48|0更新时间：2025-12-08
- 摘要：<正> 电子科技大学在研制的三毫米、八毫米谐波混频器和八毫米倍频器等关键部件的基础上,建立了三毫米和八毫米波测频、测谱（相噪）和标量网络分析系统。这项成果于91年6月15日通过了机械电子工业部电子科学研究院组织的鉴定。 “毫米波测频、测谱（相噪）系统”成功地解决了部分毫米波电子对抗——前端电路测试的主要问题。为开展我国毫米波频段的研究和开发工作提供2|17|0更新时间：2025-12-08
- 摘要：In this paper, the topological formulation of network sensitivity is derived. A computerprogrom has been compiled and used to find the sensitivity of active network. It is proved that K-Tree Term method is a multinomial time complexity algorithm.关键词：sensitivity;K-tree term;time complexity2|63|1更新时间：2025-12-08
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