最新刊期
卷 ， 期 2 ， 1984
- 摘要：The logical feature of Searle operations is discussed, an intricate truth table is given, and by using an analytic method of Boolean logic, a series of EXCLUSIVE-OR logical transforming formulas of Searle operations, , and , etc is presented. A logical network design for Searle operations is worked out, which facilitates further applications of Searle operations in sequency theory, such as the Fast Walsh Fourier Transform, and Reed-Muller signal checking etc. The importance of the four fundamental carryfree operations for binary numbers and signals is also briefly discussed.2|14|4更新时间：2025-12-08
- 摘要：For a special class of switched-capacitor filters, the VIS-SG filters, a very efficient analysis method based on a block partitioning technique will be given. Only small matrices have to be processed,which saves computation time,so that even large VIS-SO filters can be analyzed very fast and with high accuracy. It will also be shown that the methods can be extended for the analysis of other SG networks. At end, a numerical example of a VIS-SC filter will be given.2|15|0更新时间：2025-12-08
- 摘要：A method is presented for the maximization of the directivity 6f Yagi-Uda arrays whose elements are not straight conductors. The optimum shapes as well as the positions of the array elements are determined. The moment method is used in the formulation of the problem, and the simplex method is applied in the optimization process. An example shows that an optimized Yagi-Uda array of three 1.5λ elements can achieve a maximum directivity of 11. 791 dB.2|33|0更新时间：2025-12-08
- 摘要：An optimization method is used to minimize the nonlinear distortion coefficient y in approximating a sine wave by a broken-line with n broken points. The coefficient depends on the distribution of the n points provided n is given.A new formula for computing Y has been derived, and a general program has been obtained. An experiment for n=6 shows that the coefficient V obtained by this method is much smaller than the ones by any other methods. This method also holds for some other wave forms in addition to the sine wave.2|51|3更新时间：2025-12-08
- 摘要：The throughput efficiency of the ideal selective-repeat ARQ scheme （with infinite receiver buffer） is independent of the round-trip delay[1]. However, to achieve this ideal throughput efficiency, extensive buffering （theoretically infinite） is required at the receiver because ordinarily data blocks must be delivered to the user in correct order. If a finite buffer is used at the receiver,buffer overflow may occur and will reduce the throughput of the system. In this paper the throughput performance of the selective-repeat ARQ which operates with a finite receiver buffer store is provided and if the buffer overflow is handle properly, the selective-repeat ARQ still offers better performance.2|54|0更新时间：2025-12-08
- 摘要：A quantitative analysis for MOS self-bias substrate voltage generator circuit is presented. An equivalent circuit of this generator is obtained for design use. The output performance calculated with this equivalent circuit basically coincides with the experimented results. A new substrate bias voltage generator with high efficiency is developed, with a substrate bias voltage output of -5V and a current output higher than 50μA.2|18|0更新时间：2025-12-08
- 摘要：An electron-optical system optimized by the simplex method is described. By this method, the final structure of an electron-optical system can be searched with a criterion of minimum objective parameter, i. e., the coefficient of spherical aberration. As an example, an optimal structure and the corresponding electrical parameters of an extended field lens （EFL） are presented. In this case, the coefficient of spherical aberration is decreased from 826.9 to 393.2 where the focal length remains the same. Furthermore, the variations of this coefficient with respect to some machining tolerances might be easily obtained.2|68|6更新时间：2025-12-08
- 摘要：A new method for solving the boundary condition eigenvalue equation of the corrugated system is given. All the eigenvalues of fields in the corrugated cylindrical guide are obtained for the first time. The conditions of the existence of the real, imaginary or complex roots and the transformation relations between each other due to the guide parameters variations are explained. A more complete theoretical basis for selecting modes is provided for designing corrugated horns with better performancies.2|40|2更新时间：2025-12-08
- 摘要：Both the orthogonal modal series method and the high-frequncy asymptotic evaluation method are used to analyse the mutual coupling between two apertures on a perfectly-conducting sphere. The computational formulas of mutual coupling are derived. The numerical techniques of some special functions are discussed and the numerical results are given. The comparison between the two methods shows that each of them has its advantages and shortcomings. The accuracy of the asymptotic evaluation method is tested. And the mutual coupling between a pair of rectangular slots on a sphere VS. their relative location parameters is investigated.2|18|0更新时间：2025-12-08
- 摘要：The mechanism of latent-image photoetching is investigated. The conclusion is that the reaction of fluorhydric acid and silicon dioxide is the base of latent-image etching. The semipermeable membrane of gel film promotes the etching. Under photochemical reaction the photosensitizer becomes the resonance system which affects the etching rate.2|26|7更新时间：2025-12-08
- 摘要：The performance of a cell averanging detector is researched under a narrowband stationary Guassian clutter background and chi-square target models. A general formula of detection probability and a recurrent algorithm which is convenient for calculation are derived. The results indicate that the false alarm probability rapidly decreased and the detection probability evidently decreased with the increase of signal-to-clutter ratio when the target signals present in reference cells, the fluctuating level of targets is different, and the performance of detector will be different either. Finally, a principal adaptive scheme decreasing target signals in reference cells which effect on the detection performance is presented.2|19|0更新时间：2025-12-08
- 摘要：The nonlinear theory of the gyromonotron oscillator with cylindrical resonator is analysed and calculated by means of the orbit theory. The influence of the reflectance in the output end of the cavity is considered. The expressions of RF field, Q-factor and RF energy stored in the resonator are given.Calculations show that the electron efficiency and output power of a gyromonotron oscillator can be enhanced by use of parabolic magnetic field. The influences of voltage, diffraction Qd-factor, current and position of electron beam on the gyromonotron parameters are calculated for two values of α（v40/v||0）, 1.5 and 2.0.2|53|12更新时间：2025-12-08
- 摘要：The formulas for the equivalent admittance of the longitudinal shunt slot in the broad-wall of a rectangular wavequide are derived by using the variational method and Babinet’s Principle. The effect of the short-plate is taken into account. The application of the analysis results to the engineering design of slot arrays is discussed.2|19|3更新时间：2025-12-08
- 摘要：The main trends in the development of electron optics have been discussed. The foliowings are noteworthy: rotationally symmetrical electron optics for the weak narrow electron beam, electron optical matrix algebra and optimization design, non-rotationally symmetrical multipole systems, the progress of scanning electron beam system-a combined fo-cusing-deflection system, electron optics for the wide electron beam, electron and ion optical systems with a curvilinear axis, wave electron optics. The future development and applications of electron optics have also been outlined.2|92|2更新时间：2025-12-08
- 摘要：<正> 由中国电子学会和中国光学学会联合主办的首届全国光电器件学术交流会于1983年12月在南京市召开。通过讨论,专家们高兴地指出,我国光电器件近年来有了很大的发展,其设计、试制力量已初具规模;国际上各种光电器件,我国都在研制,其中不少器件的主要性能指标达到了国外同类产品先进水平。光电器件2|12|0更新时间：2025-12-08
- 摘要：Based on the Electrical Synthetic Design Method for TV sync signal[1], the result which coincides with both computer simulation and practical experiment is given by means of optimum design and computer simplified method of multi-variable output of combined logic function. Comparison between this design and conventional circuits in cost shows that this design is better.2|22|2更新时间：2025-12-08
- 摘要：This paper deals with the time of flight measurements of the electron drift mobility in hy-drigenated intrinsic amorphous silicon prepared by glow discharge decomposition of silane. The electron-hole pairs are generated on the surface of GD a-Si:H films by a 5-6ns flash of light from a dye laser. The sample is reverse biased so that the photogenerated carriers are swept across the film and then the transient photocurrent is discussed.It is found that electron drift mobilities in these a-Si films prepared under various glow discharge conditions fall in the 0.3-1.2cm2/V.s range.There is an electron-trapped e-ffect at the local states in these a-Si films, therefore all release time constants of trapped electrons are larger than 1 μs.2|64|0更新时间：2025-12-08
- 摘要：The status of transition region of Si-SiO2 interface is closely related to the character of device.XPS spectra are obtained from different specimens of anodic oxidation at differnt angles of photo-electron emission. It is shown that the oxide of anodic oxidation has a abrupt structure,and the oxide interface of thermal oxidation has a marked transition layer. The process of the anodic oxidation is discussed and the causes for the different results by the two methods of oxidation are analyzed.2|91|1更新时间：2025-12-08
- 摘要：A monolithic chroma Processing circuit for color TV has been developed using standard bipolar linear technology and double level interconnection technique. This paper describes the highlights of the manufacturing technique, its feasibility and reliability, and the actual results.2|16|0更新时间：2025-12-08
- 摘要：Principles and advantages of oxygen analysis on silicon surfaces by nuclear reaction 16O（d, P1）17O* are described, with a sensitivity of 1×1015 atoms/cm2. The effect of cleaning silicon oxide on surfaces during the silicon （integrated） device process is distinct. Observations on the growth of oxidic layers on silicon surfaces are given.2|19|0更新时间：2025-12-08
- 摘要：This paper is a comment on Reference [1], pointing out its ambiguities and inadequacies. General formulas are given for the design of a multi-stage logarithmic amplifier with each stage driven sequentially and a logarithmic amplifier using twin-gain stages.2|38|0更新时间：2025-12-08
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