最新刊期
卷 ， 期 6 ， 1981
- 摘要：The regeneration feedback tracking system, or called as computer aided tracking system, can very effectively track large dynamic targets with high accuracy. Digital computers have been used to analyze performance data owing to the fact that the system is a nonlinear one with multi-inputs and multi-outputs.This paper proposes a time-domain approach. And a mathematical model for the system analysis is achieved. In most cases, such multi-inputs and multi-outputs nonlinear system can be converted into a discoupled linear time-invariant system, which can be used to analyze in cartesian coordinates error caused by manoeuvre flying of targets and random error of tracking and in spherical coordinates mismatched error. Two examples given show good agreements between results obtained by this approach and those by digital computer simulation. It is concluded that well-known classical frequency method can be used for system analysis and analytical method thus obtained is most applicable for engineering calculation. An optimized system design is also presented.2|48|2更新时间：2025-12-08
- 摘要：: This paper is concerned with the velocity-acceleration ambiguity diagrams of FFT digital signal processor in pulsed-doppler precise tracking radars. A 32-points model of the velocity-acceleration ambiguity diagram by numerical calculation is given and an analytical solution for distribution of all side lobes is described by "Theory of Numbers". A method for measuring target velocity and acceleration iy complementary calculation to match acceleration phase shifts in FFT technique is recommended. The devices made by this method will successfully replace analog-digital time compressor for targets acquisition and measurements.2|55|1更新时间：2025-12-08
- 摘要：Until now, the history of computer development has always been divided according to the advent of new devices introducing striking changes to main frame. However, once the multiple valued logic system is realized and their theories are applied, we shall have a high efficient computer architecture that will be bring a higher level to the computer technology.The advent of DYL integrated circuit[1,2] provides a new hope for realizing the possibility as mentioned above in our country.In this paper, we propose that a linear AND-OR gate of Multiple Elemental Logic （DYL） is an excellent AND-OR gate of multiple valued logic. If combined with other circuits, a new multiple valued logic circuit will be constructed （MV-DYL for short）. By the comparison and experiment it is proved that the MV-DYL circuits can obtain higher information density than binary DYL circuits under like condition of power-delay product, and it has more advantages of simpler structure, easier realization and higher reliability than ternary CMOS and MV-I2L circuits.2|34|30更新时间：2025-12-08
- 摘要：Recently Lu Sheng-xun has shown how a modified Wang Product can be used to generate all the Hamiltonian cycles in a plane graph with considerably less computation than previously reported. In this paper, Lu’ s algorithm is generalized to nonplanar graphs and named the cycle-algorithm. The dual one called the cut-algorithm is also proposed. It can be used in arbitrary graphs, too. Either of the algorithms is explained in detail by way of an example. Two theorems are derived in which these algorithms have been proved. Both algorithms can be used for finding all of Hamiltonian paths contained in arbitrary graphs. The cut-algorithm has been carried out on the computer Type 719. According to the results from the computer’ s calculation, the number of all Hamiltonian cycles in a certain maximum planar graph with nine vertices should be 112, instead of 96 or 110 given by other authors previously.2|43|6更新时间：2025-12-08
- 摘要：This paper introduces an optimal design method of constant-delay filter. Our aim is to design a filter having high selectivity and constant group-delay within the pass-band and according with the demand of equal pass-band attenuation ripple, to meet the requirements of distortionless transmission of television, facsimile and data signals. Starting directly with the group delay, we use electronic computer with high speed and improved damping least square method to carry out optimal approximation. A desired filter is then designed through several times of iteration. This method has been proved to be very efficient by the fabrication and testing of actual design examples.2|97|0更新时间：2025-12-08
- 摘要：A new filter design technique based on transformed frequency variation is described in this paper. This technique is developed for the purpose of inpro-ving numerical conditions and solving the approximation problem, in the filter design. The paper discusses the application of this technique to each stage of the synthesis process and develops a complete CAD programme for equiripple lowpass and highpass filters. With the desired attenuation-frequency characteristic inputted, the computer can give data output defining the network structure, attenuation-frequency characteristic and delay characteristic as required.2|53|5更新时间：2025-12-08
- 摘要：New donor generation in p-type CZ Si commonly used for LSI manufacture after annealing at 700℃ has been studied. This new donor is confirmed to be closely correlated with oxygen impurity as is the thermal donor formed in 450℃ annealing. However,the new donor differs greatly in annealing behavior from the thermal donor. The generation rate of new donor is slower than that of thermal donor, and the maximum new donor concentration after annealing for a long duration （100 hrs.） is about 1015 cm-3. Impurity carbon promotes the generation of new donor. The mechanism of the new donor generation has been also briefly discussed.2|27|2更新时间：2025-12-08
- 摘要：The first and second order ion trajectories of the E x B crossed field composed of the parallel plane electric field and the magnetic field with the tilted magnetic pole faces are derived. The first and second order transfer matrixes and the ion optical properties are given for general cases. The dependence of the second order aberrations on geometrical parameters is discussed.2|14|0更新时间：2025-12-08
- 摘要：The DG-1 parity check technique is described in this paper. The dynamic configuration of CPU and the structural principles of MOS memory for Hamming codes are introduced and the fault probability in CPU and MOS memory is analyzed. On this bases, the reliability of DG-1 is evaluated.2|11|0更新时间：2025-12-08
- 摘要：Based on Grove’s theory, we introduced the concept of mean free path, studied the Kinetics of LPCVD techonlogy, calculated its process conditions and developed the formula of deposition rate as below:where: j-No. j wafer position; Ea-energy of activation; k-Boltzmann’s constant; T-absolute temperature; N（j）-consumption rate of ’silane to No.j; P-pressure; Y0-original concentration of silane.Using this formula, we have calculated silane concentration, temperature profile and optimum pressure in silane decomposition of LPCVD system. The results thus obtained are in good agreement with those of the experiments.2|77|1更新时间：2025-12-08
- 摘要：With the advance of nuclear weapons spacebornes, nuclear propulsion systems and nuclear reactors, the problem of radiation environment becomes more and more important during the last 20 years. Since the electronic devices and systems are quite sensitive to nuclear radiation, they must be well designed and hardened in order to operate and survive in space and near the nuclear reactor or the explosion of a nuclear weapon. So the antinuclear radiation electronics have been formed and developed into a new branch of electronics. An outline of so called antinuclear radiation electronics would include three major categories: （1） radiation effects （to make radiation tests and to evaluate the survivabilily）; （2） damage mechanism （to study the damage mechanism and to determine the failure modes）; （3） nuclear hardening （to make the hardening design and fabrication techniques）. An overview of the new speciality is presented in this paper.2|127|2更新时间：2025-12-08
- 摘要：A novel structure of PL called Integrated Injection Schottky Logic （PSL） is described. A vertical PNP transistor with P-buried collector is used as injector which is merged with the downward operating NPN transistor. Experimental results show that for a breakdown voltage of 30V, delay time per gate is less than 15ns, 5 times shorter than that of the conventional PL.2|10|1更新时间：2025-12-08
- 摘要：This paper describes the power spectral densities of three kinds of random coded signals, ASK, FSK and PSK, and presents some characteristics suitable for computer recognition of power spectral densities. Much efforts have been made to estimate parameters of these signals under strong background interferences. An example is given with satisfactory results.2|58|0更新时间：2025-12-08
- 摘要：In the present paper, a briet description of homomorphic image processing principles is given and some design considerations on multiplicative homomorphic image processing by television technigue are discussed. Finally, some engineering comments are given and the experimental results are illustrated. Although the experiments done were rather preliminary, the photographic results shown seem to be comparable with that obtained by digital methods.2|20|0更新时间：2025-12-08
- 关键词：《电子学报》;Doppler;XeF;钱惠生;准分子激光器;变换法;BCH;Velocity;DFT2|13|0更新时间：2025-12-08
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