最新刊期
卷 ， 期 5 ， 1982
- 摘要：In this paper robust detection in non-Gaussian correlative noise is discussed. We assume the noise sample can be expressed as follows:n1=y1 + ρ（y1-1+y1+1）, i = 1,2,.....,Nwhere {y1} is i. i. d. sequence. If the marginal distribution F of noise sample satisfies certain regularity conditions, and if ρis small, the memory and memoryless robust detectors are given. The minimax solution is first-order approximation of ρ.2|55|4更新时间：2025-12-08
- 摘要：Baumert[2] developed the theory of binary sequences with the property of transorthogonality and orthogonality for cyclic shifts. Turyn[3] investigated the existence of binary sequences with small autocorrelation values in terms of min max|aj | where a1 is theperiodic correlation and the minimization is over binary sequences of fixed length. In this paper we restrict the investigation to cyclic correlation and drop the absolute value sign in the min max expression.In this study many binary sequences were found with autocorrelation properties in between transorthogonality and orthogonality. The most interesting sequences were those we named Yin-Yang sequences whose out of phase correlations are zero except for r equal to one half the period when the value is negative. Within this class, an infinite family is constructed.An exhaustive list of binary sequences with non-positive out of phase autocorrelation for lengths 4,8,12,16,20,24,28,32,36,40 was obtained by computer search and presented at the end of this paper.2|32|1更新时间：2025-12-08
- 摘要：In the last lew years of the seventies, the fault tree of the noncoherent system was applied in the reliability analysis of complex systems. The most difficult thing in such analysis is how to simplify the fault tree. This paper presents a simpler method called search method to simplify the fault tree. In the paper some convenient techniques based on the application of the basic rules of logic algebra are used to reduce the search work. The search method can fully meet the needs of engineering calculation.As an example, the L-P fault tree has been simplified by this method and twenty prime implicants have been obtained. However, the term, minimum cut set, is still used instead of the term, prime implicant, because the search method is not a strict mathematical method and the term, minimum cut set is more familiar to most engineers.2|28|1更新时间：2025-12-08
- 摘要：The problem of the space charge fields in ECRM has been solved by means of Green function in this paper. The relations between the space charge fields and the guide waves in wave guide have been derived. The parameter called "space charge factor" is introduced in terms of this relations, by means of which the effect of space charge on the dispersion characteristic of ECRM can be taken into consideration.The concept of 5-space is introduced, so that the space charge effect within a guiding centre system as well as between any two guiding centre systems may be taken into account.2|20|6更新时间：2025-12-08
- 摘要：This paper describes the operating principles and the basic properties of single active transmitting antenna, single active receiving antenna, active transmitting array and active receiving array. The formulas for calculating the self and mutual impedances of active transmitting array and active receiving array are discussed in detail. Some experimental confirmations are presented in this paper.2|441|10更新时间：2025-12-08
- 摘要：In this paper, geometrical optical properties of off-axis fed parabolic cylinder reflector are discussed, and the geometrical optical objective function is proposed. The optimal feed positions as a function of the tilted angle and aperture size are obtained with numerical method. Properties of the reflected rays from the parabolic cylinder reflector are discussed, and limit positions of the optimal feed positions are obtained when the antenna aperture size is very small. Some radiation patterns are calculated, and the results show that the geometrical optical objective function is useful for engineering practice.2|102|0更新时间：2025-12-08
- 摘要：<正> 《中国大百科全书·电子学》卷编辑委员会筹备组第三次扩大会议于七月二十九日至三十一日在北京举行。筹备组委员孙俊人、陈芳允、王守觉、毕德显、沈宜春、沈德柽、吴佑寿、吴畿康、吴朔平、孟昭英、林为干、张直中、胡汉泉、顾德仁、蔡长年、蔡金涛等出席了会议（罗沛霖、吕保维两位委员分别因病、因事请假）。筹备组各分支学科编写组负责人和组成人员,八十余位专家学者,中国大百科全书出版社的领导同志等应邀出席了会议。 在会议上,筹备组负责人、中国电子学会副理事长孙俊人同志对前一阶段的筹备工作向会议作了简要汇报。他说,自从今年二月中国大百科全书出版社委托我们电子学会组织编撰《中国大百科全书·电子学》卷的任务以来,在各有关方面的支持和各界专家学者的积极参与下,先后完成了以下三方面的工作。首先是成立了编委会筹备组并确定了负责人选,设置了作为筹备组办事机构的编辑办公室;其次是初步划定了分支学科并确定了它的编写组负责人2|15|0更新时间：2025-12-08
- 摘要：A new algorithm for generating all arborescences ∑r+ of a given directed graph G = （V,E）, with vertex r∈V as root, is suggested. It gives as the result an expression of a form of so-called "direct products-direct sums", which is especially suitable for the practical applications of the original problems from which the topical generation of all arborescences was abstracted.The new algorithm （GEN） is based upon two sorts of graph decomposition namely, the decomposition of a graph G = （V∪{r}. E） into several "sub-configurations" （a new concept）G[Vt] = （V1, E（V1））, ∪1=V, V1∩V1=φ, E（V1）= ∪VEV1 E-v, giving direct products:vev,∪（G）= x∑G[V1]), and the decomposition of the in-arc set of a vertex, E-v = D1∪D2, D1∩D2 =φ, giving direct sums: ∑（G） = ∑（G1）∪∑（G2）, ∑（G1）∑（G2） =φ.A new concept, （proper） back-arc, is formulated, and an algorithm （DEL） for deleting such arcs is proposed. The deletion of such arcs has not any effect on the set ∑r+.The complexity of the above algorithms is as follows: for the algorithm DEL, the time is O（EV）, the space is O（E）; for the algorithm GEN, the time is O （EVK）, the space is O（E）, where V and E are the cardinal of the vertex set, and the cardinal of the arc set （of the given graph G） respectively, and K is the times of call for algorithm DEL by algorithm GEN, i. e. the number of the appearances of the sign " + ’’ （the sign of direct sum） in the resulted expression.3|65|0更新时间：2025-12-08
- 摘要：This paper discusses a principle and method of the X-ray stereoscopic TV display which is realized by means of a complementary color separation approach. Results show that the image thus obtained is real and clear, with an outstanding stereoscopic effect and convenient for both real-time observation and obtaining stereoscopic photographs.2|31|0更新时间：2025-12-08
- 摘要：This paper investigates the physical dependence of the Early voltages VA（I）and VA（V） of a bipolar junction transistor having an arbitrary base doping distribution. A simple expression for the relationship between VA（I） and VA（V） is obtained. The current dependency of VA（V） is also given which shows that VA（V） will begin to decrease at a little high injection and can be less than VA（t） due to the bass correction factor. It is pointed out that it seems doubtful to determine the dominant mechnaism limiting the current amplification factor from the measured output conductances, owing to not only the variation of VA（V） but also the existence of the doping-profile-dependent correction factor.2|89|1更新时间：2025-12-08
- 摘要：This paper presents a parallel algorithm together with a VLSI architecture for solving linear algebraic equations Ax = b with N orders. The number of long operation steps of this algorithm is about 5N, whereas the number of long operation steps of Horowitz’s algorithm[1]is about 8N. This VLSI architecture uses N2 Processing units, which is 3N less than that required for Horowitz’s architecture.[1]2|31|1更新时间：2025-12-08
- 摘要：<正> 杭州大学已成功地研制出一种新型的半导体三端恒流器件——3DH01—05型可调恒流管。该管经近两年来的试验和改进,已可供实用。其主要性能:最高工作电压为30～70V;最低工作电压为7～8V;输出电流为5～500mA,改变它的控制电阻可实现输出电流的分挡连续可调;动态电阻为20～200kΩ;电流温度系数一般低于0.1％℃-1。 该管可用作恒流源,在数十和数百毫安范围内可代替一般使用的串联调整型稳定电路,还可在仪器桥路中直接实现恒流;用于基准电压,把它与2DW7C串联,对标准稳压管恒流供电,可显著提高基准电压2|36|0更新时间：2025-12-08
- 摘要：This paper studies the effects of the data window spectrum on the estimation of the signal spectrum, discusses the method of direct computation of the data window spectrum by FFT algorithm, and introduces some parameters characterizing the data window spectrum and their computation. Also analysed here are the spectral characteristics of some common data windows.2|133|2更新时间：2025-12-08
- 摘要：This paper describes a method of constructing group synchronous special codes. This method is not only for the existing Barker code, but also for the other group synchronous special codes which have sharp autocorrelation properties.2|46|0更新时间：2025-12-08
- 摘要：A new counting-shift register and the counting-shift register version of delay circuit have deen designed and described in this paper.2|35|0更新时间：2025-12-08
- 摘要：Based on the kinetic process of excimer formation and using simultaneous solution of the rate equation ior population density and photon density and the equation for discharge circuit, the relationship between the pulse width and output in a fast-discharge excimer laser on the one hand and the discharge parameters on the other hand is obtained.The computed results are essentially in agreement with the experiments.2|65|0更新时间：2025-12-08
- 摘要：Two improvements are proposed for the two calculating models of permanent magnets: the scalar potential model and the vector potential model, by which a surface density of fictitious magnetic monopoles （or surface bound current density） invariable with the operating point, is substituted for the volume density, and the definition of reluctivity in the vector potential model is modified accordingly, so that the calculation and computer program can be simplified. The improved models have proved out by experiments and computation.2|622|40更新时间：2025-12-08
- 摘要：A novel circuit (or adjusting pulse width has been proposed, which is based on the principle that the leading or trailing edges of the output pulses of an I2SL gate can be shifted individually by varying the injector currents. It is found that, for such an application, the novel circuit has obvious advantages over conventional delay circuits. Experiments show that the output pulses can be obtained continuously iron; 5ns to 50ns at a clock rate of 10MHz, which is in good agreement with the simple theory.2|11|0更新时间：2025-12-08
- 摘要：This paper presents the solution of the differential equation of the nonlinear circuit containing a varactor and the calculating formula of its resonance curves, and also describes a method by which the resonance curves for varactor frequency multipleirs can be approximately analysed. The experimental resonance curves are given for comparison.2|30|1更新时间：2025-12-08
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