最新刊期
卷 ， 期 4 ， 1980
- 摘要：A generalized relationship for calculating the ambiguity function of the radar signals is derived, which can be used to calculate any complex signal by layer-by-layer repetition and multiple modulations. A linear FM rectangular envelope sub-pulse is taken as an example of the component signal. The relationship derived is widely applicable in many cases, such as a single pulse and the coherent pulse trains, linear FM in the pulse duration, frequency and phase shift coding of the contiguous sub-pulses, staggering the repetition period and interpulse frequency shift, complex weighting of the pulse trains and so on.An ALGOL program and its practical application was given by author in another paper.2|156|3更新时间：2025-12-08
- 摘要：In this paper a new type winding of electrical machines--harmonic distribution winding hasbeen presented. This technique differs from the conventional one and it purposefully makes use of harmonic field in air gap generated by this winding for harmonic compensation or approach. In many applications,it has been proved that the limit of linearity in linear rotatory transformers may be broken by means of this winding and the linearity may be held on grade 0（±0.055% or ±2’）,in some products even up to ±0.02% or ±45". In this paper theory of this new winding and error regularity of these machines have been analyzed and test results provided.2|68|2更新时间：2025-12-08
- 摘要：In this paper the performance of a type of frequency analyzer under white Gaussian noise distributions is discussed. The frequency analyzer is an essential part of the acquisition receiver in precisiontracking systems. The analyzer we developed is of the type of multiple current switched logic circuit with weighted resistance network. The points, which are investigated with emphasis, are as follows. （1）The selection of the optimal threshold of signal detection. （2） The false alarm and miss probabilities in multiple channels with unequal bandwidth. （3） The influence of noise on the analyzer output. （4） The performance of the analyzer under more generalized condition, that is, when the input is a set of spectrum lines.It is shown that our analyzer has the ability to guide the receiver to lock on the carrier even when the carrier amplitude is smaller than that of the subsidiary lines of subcarriers.2|54|4更新时间：2025-12-08
- 摘要：In this paper, the reliability of a large scale general purpose computer system （151-3/4） is analyzed in detail. Some basic parameters such as MTBF （mean time between failures） and λ （rate of failures per unit time） of reliability of the whole system, subsystems and integrated circuits, etc.are statistically determined. The formulas of reliability calculations are derived. The reliability design, calculations and predistribution are worked out in steps. Various experiment items and quality control of production are simply described.2|35|5更新时间：2025-12-08
- 摘要：In this paper a magneto-resistance effect of the double injection long diode with the introduction of a high recombination centre on one of the lateral surfaces is studied based on the two-dimentio-nal equation. The general relation between the carrier effective lifetime, J-V charafteristics and the magnetic field is clarified, the magneto-sensitivity established, and their approximate expressions in a strong or weak magnetic field are given as well.Finally, the theory is compared with the experimental curve and data of Germanium-magneto-diode. The result indicates that the theory agrees with the experiment.2|22|4更新时间：2025-12-08
- 摘要：From the view point of field sources, the electro-magnetic field problem of microstrip type transmission lines is treated by using a generalized method of "computer analogy of electrostatic induction process". The calculable physical quantities are: distribution of charge and current, charactristic impedance, phase wavelength, losses in conductors and dielectrics, etc. As an example of applications, the calculated results of standard microstrip lines are presented. The accuracy of calculation which is high enough for practical purposes is illustrated.2|53|0更新时间：2025-12-08
- 摘要：In orthogonally polarized H（11）° Multi-mode circular waveguide systems,filtration of several lower high-order modes such as E（01）° E（11）° has been treated favorably. However, no report on further research in the filtration of higher-order modes such as H（21）° has so far been revealed. In this paper, operational principle and design scheme of an H（21）° mode filter are dealt with, approximate formula for determining mode coupling quantities according to Bethe’s small Holes diffraction theorems is derived, and methods for compu-ting mode attenuations for cascaded multicavity filter and reflection characteristics of dominant mode are proposed. Experimental results have checked well with the theoretical analysis and design formulas; the transmission characteristics of the dominant and higher-order modes are perfectly satisfactory.1|20|2更新时间：2025-12-08
- 摘要：The"Lateral Inhibition"is a general phenomenon existed in visual nural system. The image con-tour information can be extracted by means of an electronic network simulating the "Lateral Inhibition" function. The principle and method are described in this paper. The frequency response of the simulating electronic network is also discussed. It would be useful to observation and recognition in some electro-optical systems.2|88|2更新时间：2025-12-08
- 摘要：This work presents the growth apparatus of VPE multilayer GaAs and outlines the experimental technique and some results of experiments for preparation of multilayer GaAs layer in a reactor of two chambers. The feature of this technique is to avoid storage effect. Three sorts of layers have been prepared for microwave device applications. Using these, materials, we have obtained a 144 mW output power with 3.84% efficiency at 56.5 GHz,a noise figure of 2.4 dB with an associated gain of 6.5dB at 9.3 GHz and a continuous power output of 3W with 20.2% efficiency at 8.57GHz for the Gunn diode, FET and IMPATT diode respectively.2|16|2更新时间：2025-12-08
- 摘要：The model of correlator considered in this paper is suitable for any kinds of multilayer correlator, including polarity coincidence correlator and analogue correlator.A simple calculation method of the output of a multilayer correlator is given. In certain sense there exists an optimum threshold for layer operation, the theoretical analysis and practical evolution are presented.2|33|2更新时间：2025-12-08
- 摘要：A new network model of electronic smoothing filter is proposed and it is proved that this model has a ideal smoothing factor approaching infinity theoretically. In the experimental circuits, both the reverse-connected composite mode of transistor and the positive grid characteristics of vacuum-tube are used. Therefore, the filtering function of the electronic devices is performed to the fullest.The results of experiments show that, the smoothing factor of transistor filter may reach 11000 and the smoothing factor of vacuum-tube filter may reach 2300.2|47|0更新时间：2025-12-08
- 摘要：In chapter 10 of the book, the derived formula for determing the acquisition range of phase-locked loop isit seems to be erroneous and must be corrected asIn this paper, the corrected formula is derived and its correctness is proved from the view of physical concept.2|39|1更新时间：2025-12-08
- 摘要：In the paper two types of low loss simulated inductors are described. Their application to realization of filters and a simplified method for their adjustment are presented. Design examples are also given. It is shown in practice that simplicity, stability,low cost, ease of adjustment and very good response to temperature variations are among the major features of the filters, thus they are suitable for en-gineering applications.2|115|3更新时间：2025-12-08
- 摘要：A coa xial hybrid-ring （four-terminal pair network） can be simplified to a two-terminal pair network. Its scattering matrix and design formulas under the conditions of arbitrary power distribution are derived. The experimental results which quite agree with the theory are also given. Compared with other directional couplers, the hybrid-ring provides the advantages of simplicity and accuracy in design.2|31|0更新时间：2025-12-08
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