最新刊期
卷 ， 期 4 ， 1984
- 摘要：Starting from the hardware configuration of the computer, a variety of hierarchies of control information at the microprogramming level is considered, the formal definition of microoperations is developed, and the microinstructions are organized based on the physical parallelism between microoperations. Such microinstructions are complete and full to describe the computer inherent parallelism. Therefore, they can be used as microprogram computing resources by microprogramers and are integrated. Two types of parallelism, physical and logical, are distinguished. The identification of the physical parallelism and the detection of resource conflicts not at the microprogram level but at the microinstruction level are useful to increase the flexibility in microprogramming and the efficiency of microprograms, and to realize the project of high level microprogramming languages.2|20|0更新时间：2025-12-08
- 摘要：The accurate formula of the characteristic impedance of the transmission-line with elliptic outer conductor and microstrip inner conductor was obtained by conformal transformation, in which some shape and position of the microstrip are included.2|39|4更新时间：2025-12-08
- 摘要：The equivalence between a narrow conducting strip and a thin conducting wire is investigated by means of an analytic method. If the wire radius is 1/4 of the strip width the equivalence is applicable to both the induced currents and the reactions in both two-dimensional and three-dimensional cases. It follows that the great amount of data, curves and computer programs available for the thin wire case can be employed in the calculation for narrow slots and strips.2|14|3更新时间：2025-12-08
- 摘要：A new diagnosis method for analog circuits-tearing method is presented. Anindirect measurement terminal equation is developed. The subcircuit terminal is said to be measurable if m≥m2, and the faulty branch’s parameter is said to be calculable if m = b1+l. Several techniques and formulas for fault location are proposed based on consideration of the tolerances of the nonfaulty elements. This method is capable of fault diagnosis in parallel branches at a single test frequency. Fault diagnosis in ladder circuits are also discussed.2|96|11更新时间：2025-12-08
- 摘要：G. Bruun’s new FFT algorithm with a minimum of complex coefficients is studied. A formula for the real coefficients’ recurrence is derived, and an output-indexing method is proposed. The algorithm is programmed and computer-simulated, and the effects of finite register length for the algorithm’s realization is analyzed.2|32|0更新时间：2025-12-08
- 摘要：<正> 科学院半导体研究所利用国产的分子束外延（MBE）设备,继制备成功具有国际水平的高纯N型GaAs单晶薄膜之后,新近,又研制出高迁移率的选择掺杂AlGaAs/GaAs异质结,并对这种异质结的二维电子气物理性质进行了研究,观测到了它在4.2K下著名的Shubnikov-de-Hass振荡和量子化霍尔“平台”效应。2|57|0更新时间：2025-12-08
- 摘要：The two dimentional problems of the diffraction of the electromagnetic wave by a perfect arbitrary form conductor inbedded in the electromagnetic field are discussed in detail. A general method to solve the diffraction’s wave field is presented. The General analytic formulas calculating the distribution of the electric current on the conductor surface are given.2|143|2更新时间：2025-12-08
- 摘要：The problem of estimating the precision （or variance） of a product under development testing is considered from a Bayesian approach m sets of precision trials are performed under conditions which lead to an ordering of precisions h1<h2<…<hm. The parameter of interest is hm, the final underlying precision of the product. The marginal posterior probability density function for hm is obtained when the conjugated type prior distribution without prior knowledge is assumed. An approximate solution is derived to meet the practical engineering needs, and the method is illustrated2|45|12更新时间：2025-12-08
- 摘要：Type S and type M impregnated dispenser cathodes were investigated using home-made soft X-ray appearance potential spectrometer （SXAPS）, commercial X-ray photo-electron spectroscopy （XPS） and Auger electron spectroscopy （AES）. The results indicate the presence of considerable difference between type S and type M cathodes. It was found that in activated type M cathode the barium and oxygen were coadsorbed on surface, while in activated type S cathode the surface contained both barium and barium oxide. A new Auger parameter was recommended as a characteristic parameter in determination of the chemical state of barium, including activated dispenser cathodes. The substrate surface of type M cathodes appears to consist of Os/Ru covered with W which has migrated out of the pores. A model surface of monolayer barium on W was used to examine the destructive effect of beam current used in SXAPS. No evident destructive effect was observed.2|23|2更新时间：2025-12-08
- 摘要：A new injector, made of oxidized TiSi2 film and suitable for low voltages （6-10V）, is introduced. Its characteristics are measured. Experiments show that, with this structure, more electrons are injected into the SiO2 under a low electric field. The RBS spectra. X-ray diffration and SEM microphotographs are employed to study the microstructures of the various samples.2|13|0更新时间：2025-12-08
- 摘要：The dispersion characteristics of thick strip meander line periodic slow-wave structures, one on a dielectric plate and the other supported by dielectric bars, are analysed, using simplified model’s method to find the characteristic admittance within the unit cell of the periodic structures and using multiconductor transmission line theory to determine the dispersion equation of the meander lines, the computed dispersion curves agree well with the experimental results.2|103|11更新时间：2025-12-08
- 摘要：<正> 中国电子学会电子线路与系统专业学会第五届年会于1984年5月24日～28日在西安举行。这次学术交流会是我国电路与系统学科领域中的一次盛会。 这届年会共收到论文258篇,录取了111篇在会上宣读,以摘要形式收入论文集的有41篇。这些论文涉及到电路与系统理论、计算机辅助电路设计、固体电路、数字信号处理、非线性2|9|0更新时间：2025-12-08
- 摘要：There are three different types of down-looking airborne early warning radar being used at present: low pulse repetition frequency radar, medium pulse repetition frequency radar and high pulse repetition frequency radar. Their differences, advantages and disadvantages, some of their technical problems to be solved, and the different ground features and clutters that they are designed for, are discussed. So the best trade-off solution can be made according to different situations and conditions.3|134|2更新时间：2025-12-08
- 摘要：Characterisiics and recent developments in acoustic microscopes especially those with mechanical scanning are reviewed Main references on this topic are listed as a guide for further understanding.2|80|7更新时间：2025-12-08
- 摘要：<正> 这次会议于1984年5月7日至13日在安徽省旌德县召开。来自全国61个单位97名代表参加了会议,经审评选出78篇（46篇宣读、其余书面交流）论文。这些论文涉及面广,不仅在理论探讨上有所进展而在实际应用方面的成果也大为增多,因此,在一定程度上反映了我国近几年来在线天线、电小天线理论与实践方面的提高和发展。2|34|0更新时间：2025-12-08
- 摘要：A unified broadband parametric amplifier has been developed by means of circulator-para-metirc amplifier integration. Experimental results show that the integrated design can effectively and easily obtain broadband response and decease insertion loss and noise figure as well.2|28|0更新时间：2025-12-08
- 摘要：Serial numbers are given to 3129 different Chinese characters according to their frequency of occurrence in chinese scientific publications amounting to 1 million characters. The result is, with small serial number n, the frequency of occurrence is approximately Zipf distribution, while with big n the distribution approaches exponential. The frist order entropy and the average code length of the optimum code of the Chinese characters are evaluated. The multiple order entropy and the phonetic entropy of the chinese characters are also evaluated, and an input scheme is analyzed.2|136|8更新时间：2025-12-08
- 摘要：A method of quasi-bell transform pseudo-color coding used in TV is described. With this method one can make the pseudo colors vary continuously as well as make the pseudo-color, corresponding any given gray level, change abruptly as to be a specially strong color.2|22|1更新时间：2025-12-08
- 摘要：An optimization criterion on the basis of analysing the power ratio between the carrier and the various subcarriers in the narrowband phase-modulated system is derived with or without a spuare-wave and K sinusoidal subcarriers. This method has been applied to the astronomic satellite design in the Chinese Academy of Sciences successfully with good results.2|27|0更新时间：2025-12-08
- 摘要：<正> GH系列高压毫微秒脉冲发生器是哈尔滨特种元器件厂承接中国科学院半导体所科研成果而定型生产的一种新颖固体脉冲源。它的电路全部晶体管化,特别是主脉冲形成级采用了哈尔滨特种元器件厂生产的3DB系列专用雪崩管,使该仪器成为一种小型化的高压毫微秒装置。该发生器提供的上升时间小于2.5ns、幅度逾千伏的高速高压脉冲,可用于激光、雷达、超声、高速摄影、加速器等许多重要的技2|31|0更新时间：2025-12-08
- 摘要：The quartz crystal damages due to ion beam milling is analysed and suitable milling conditions and some damage-reduction measures are proposed. As a result, the UHF resonaors have low equivalent resistance, high Q value, fine frequency response and usable mechanical property.2|45|3更新时间：2025-12-08
- 摘要：An investigation of secondary electron emission properties of electrically conductive as well as highly thermally conductive sintered diamond,electroplated synthetic diamond and natural diamond is described briefly. Of all the materials, diamond shows the most favorable results for depressed collector use.2|93|1更新时间：2025-12-08
- 摘要：High quality epitaxial layers for x-band Gunn devices are grown by LPE technology, with a yield of 80%. The yield of the device made of this material is higher than 60%. Such devices are used in different kinds of microwave equipment.2|8|0更新时间：2025-12-08
- 摘要：A portable broadband VLF receiver with 56cm air-core loop antenna and automatic realtime calibration has been developed. The system sensitivity is 1.4×10-6 V/m·Hz1/2 （at f=5kHz）, and the bandwidth is from 250 Hz to 48 kHz. The simultaneous observations at a number of field stations show that the performance of this system is stable.2|79|3更新时间：2025-12-08
- 摘要：A new semiconductor switching device with bidirectional negative resistance characteristic is developed. The device called Bidirectional Negative Resistance Transistor （BNRT） is based on a combined structure of a transverse transistor and two longitudinal transistors. The BNRT is made by Si epi-taxitl planar transistor technology, and it can readily with TTL integral. The response rise time measured for the first fabricated BNRT’s is 10-30 ns, and the amplitude of the output pulse is 3-4V at 50Ω load.2|51|9更新时间：2025-12-08
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