最新刊期
卷 ， 期 5 ， 1985
- 摘要：The possibility of combining MOS with DYL circuits is analyzed, and the designs of ternary-and quarternary-valued logic function circuits using mono or multi-thre-sholdvoltage MOS circuits and DYL circuits are proposed.2|33|14更新时间：2025-12-08
- 摘要：Based on the fundamental principle of six-port circuit, two self-calibration equations derived from the system equations are presented. Several self-calibration methods are disscused by means cf eptimum method. The resulting set of computer simulation and measurement on a six-port reflectometer show that significant improvement both in error cancellation and in self-calibration speed are obtained.2|33|2更新时间：2025-12-08
- 摘要：A CAD analytical method and its corresponding program for microwave FET nonlinear circuits are described. The contents include the nonlinear modeling of MESFET’s, the method of quick convergence for obtaining the steady state response of nonlinear state equations and computing program. The CAD method and program can be delivered to resolve various microwave FET nonlinear circuits-multplier, mixer, large signal amplifier, generator etc. The results of FET mixer using this method are given here as an example.2|33|1更新时间：2025-12-08
- 摘要：The inherent relation among the false lock and the phenomena of frequency back-push and rejection to acquisition is discussed which caused by the time-delay when the PLL has a H. F. link. The analysis is based on the work of Develet and Gardner, but it revises the condition for establishing the false lock and points out the limitation of the viewpoint that the false lock only occurs in the pseudo-zero at pulling curve. Also presented is the relation of different parameters that should be maintained when no rejection happens to signal acquisition.2|42|1更新时间：2025-12-08
- 摘要：Recent data from methods of core, core, valence Auger transition, surface plasmon, Auger and photoelectron energy separation, angle resolved photoelectron spectroscopy etc. prove that the model of dynamical surface emission center is a correct description of the emission mechanism of the practical thermionic cathodes. However, the adsorption of various atoms on and the passage of electrons to the emission centers should be further studied.2|164|4更新时间：2025-12-08
- 摘要：Simple algorithms and design formulae for circulator wave digital filters are given. Using these formulae the structure and coefficients of filters can be obtained without comprehensive computer programs, and special knowledge of filter synthesis. Explicit formulae for self-reciprocal filters will also be presented.2|22|2更新时间：2025-12-08
- 摘要：An integrated circuit pressure transducer consisting of a full bridge of piezo-resistors with a novel design and an amplifier with temperature compensation is described. The configuration and dimension of the （100） rectangular Si diaphragm as well as the locations and the dimensions of the resistors are optimized through careful computation. The temperature coefficient of the whole circuit is analysed and minimized. The design has been implemented by conventional bipolar IC technology and anisotropic chemical etching. The transducers fabricated show a sensitivity of about 1000 μV/mmHg and have been used for physiological pressure measurement in clinical applications.2|81|1更新时间：2025-12-08
- 摘要：The identification of mode compositions of gyrotron output power is discussed by using far-field radiation pattern analysis. A general analytical method and a simple experimental approach are given. The suggested method can also be used for measuring high power mode-conversion oversized waveguides.2|25|1更新时间：2025-12-08
- 摘要：According to synthesis of the formation electron beams, the general solutions of space-charge flow and electrode shape are derived in the crossed electric and magnetic fields electrode system in which the cathode operates under arbitrary condition. Characteristics of some magnetron injection guns and crossed-field guns, which are based on the general solutions, are calculated and analysed, The effects of the cathode surface electric field intensity and electron initial velocity on electron trajectories and electrode shapes are discussed.2|10|1更新时间：2025-12-08
- 摘要：The mathematical model of shape optimization for subreflector is given by taking the antenna efficiency based on diffraction as the objective function and shape parameters of the subreflector as the optimal variables. The optimal design of efficiency for the dual-reflector antenna is realized by solving this model. This method has been proved to be effective after computing the examples with engineering applications.2|104|4更新时间：2025-12-08
- 摘要：Let GF（q） be a finite field, where q = 2m. Multiplications are performed often using log and antilog tables of q - 1 non-zero field elements. It is shown that for q = 22n and 2n + 1 a prime, the log and antilog of a field element can be found with two substantially smaller tables of 2n + 1 and 2n - 1 elements respectivelly. The memory requirements for finding log and antilog are reduced from 2 · （22n - 1） to 4.2n memory elements.2|40|0更新时间：2025-12-08
- 摘要：The wave impedance in a TE10 rectangular waveguide unloaded and loaded with a centred dielectric slab or a ferrite toroid is analysed. An expression for the reduced wave impedance, reduced waveguide wavelength and reduced propagation constant is derived. Thus the design problem of an impedance tranformer is changed into the solution of the characteristic equation for the reduced propagation constant. Experimental research on the matching of the ferrite waveguide phaser is carried out, and good agreement between theory and experiment is obtained. Both the theoretical and experimental results show that by using the one-step impedance transformer, a ferrite phaser with VSWR<1.25 in 10% bandwidth can be realized.2|58|3更新时间：2025-12-08
- 摘要：The static saturation characteristics of high-voltage power transistors with lightly doped collector region is discussed.An analytical expression of saturation voltage is derived, in which the high level injection effect of collector junction is considered.2|53|1更新时间：2025-12-08
- 摘要：The dyadic Green’s functions in spherical coordinates in free space are derived by the methods of GA, Gm and Ge0 and a systematic investigation on the general properties of the dyadic Green’s functions at the source region is made. Ambiguities associated with dyadic operation in the literature are clarified and some errors are redressed.2|62|4更新时间：2025-12-08
- 摘要：Coupling properties of any two longitudinal slots in the wider walls of a rectangular waveguide are analysed. The theoretical results are in good agreement with the experimental results and with the data previously obtained （for single slot and half-wavelength slots）. Based on the calculated and the experimental results, the electric field distribution at the aperture surface, the admittance, the resonant conductance, and the resonant length of the slots are discussed, taking into account both the effects of external and internal mutual coupling between the slots. The effects of the waveguide wall thickness and narrow-side width are also discussed.2|390|71更新时间：2025-12-08
- 摘要：In terms of the system of computer vision,whether the different textures of the identical multi-order statistics can be discriminated by computer is researched out.Firstly based on the mathematical model suggested by B. Julesz, use computer to synthesize several different textures of the identical multi-order statistics, then extract their features and use the pyramid to discriminate and classify them. The result is excellent.2|21|1更新时间：2025-12-08
- 摘要：A survey is presented of the singularity expansion method which has received a great deal of attention over the last few years as an effective computational tool in dealing with transient electromagnetic fields. Its principles and procedure in solving the problems are described. Some uncertainties in its applicability and theoretical completeness are also discussed.2|185|14更新时间：2025-12-08
- 摘要：Based on the theory of the information measure for fuzzy sets, the information measure for gray-tone images is discussed. The theoretical results show good agreement with previously published experimental results. From the viewpoint of image information, the images with gray levels between 3 and 4 bits can have good quality.2|38|6更新时间：2025-12-08
- 摘要：The experimental research of the superconducting microwave surface resistance with China’s niobium material （Nb2-l） at the liquid helium temperature is described. The measurement is made on X-band TE011 mode cavity. Unloaded Q0 value of 4.3×106 is achieved at a temperature of 4.2 K. The equivalent residual surface resistance is 1.8*10-4Ω.2|39|5更新时间：2025-12-08
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