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1996 Vol. 18, No. 1

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Articles
ESTIMATION OF ATTRACTION DOMAIN AND EXPONENTIAL CONVERGENCE RATE OF CONTINUOUS FEEDBACK ASSOCIATIVE MEMORY AND ITS APPLICATIONS
Liang Xuebin, Wu Lide
1996, 18(1): 1-6.
Abstract:
The attraction domains of memory patterns and the exponential convergence rate of the network trajectories to memory patterns for continuous feedback associative memory are estimated. These results can be used for evaluation of error-correction capab...
SMOOTHING ALGORITHMS FOR BINARY IMAGE USING CELLULAR NEURAL NETWORKS
Yang Tao
1996, 18(1): 7-14.
Abstract:
The piecewise linear saturation characteristics of cell in a cellular neural network(CNN) and phase plane analysis method are used to realize linear separable and nonseparable Boolean expressions. And the principle is also used to achieve some CNN sm...
A NEW METHOD OF DECONVOLUTION IN THE FREQUENCY DOMAIN
Wang Yanfei
1996, 18(1): 15-19.
Abstract:
A new method of deconvolution in the frequency domain is proposed. The relationship between the proposed method and traditional Discrete Fourier Transform(DFT) method is also discussed. It can be seen from this paper that the new method based on the ...
BIT-CORRELATION MATCHING FUNCTION FOR SEQUENCE IMAGE CODING
Chang Yilin, Li Bingbing, Li Feipeng
1996, 18(1): 20-24.
Abstract:
This paper proposes a new block matching criterion called the bit-correlation matching function for sequence image coding. By using the same fast search algorithm, the bit-correlation matching function not only results in as nearly same a uracy in di...
BLOCK ADAPTIVE RECUSIVE ALGORITHM FOR VIDEO CONFERENCE CODING
Tu Guofang, Zhang Can
1996, 18(1): 25-30.
Abstract:
This paper presents a new motion estimation algorithm for video conference signal coding. This type of algorithm is called block adaptive recursive algorithm (BARA). Simulation results show that this new algorithm has better performance than that of ...
CHAOTIC ELECTRON TRAJECTORIES IN A CIRCULAR FREE ELECTRON LASER
Yin Yuanzhao, Yin Hejun
1996, 18(1): 31-35.
Abstract:
The motion of a relativistic electron is analyzed in the field configuration consisting of a circular wiggler magnetic field, an axial magnetic field, and the equilibrium self-electric and self-magnetic fields produced by the non-neutral electron bea...
A MATCHING FILTER METHOD OF THE QUADRATIC PHASE FOR MOVING TARGETS IMAGING IN SAR
He Junxiang, Li Jingwen, Zhou Yinqing
1996, 18(1): 36-42.
Abstract:
Based on the analysis of SAR radar return model, an approach using Doppler-rate matching filter is proposed. It can solve the problem of azimuth defocus because of the quadratic phase mismatch. Then a fast algorithm structure given by matching matrix...
THE APPLICATION OF NONORTHOGONAL FD-TD ALGORITHM IN 2-D TM SCATTERING PROBLEMS OF CONDUCTING CYLINDERS COATED WITH ABSORBING MATERIALS
Zhang Yusheng, Fang Jing, Wang Wenbing
1996, 18(1): 43-49.
Abstract:
The foundational principle of the nonorthogonal PD-TD algorithm is introduced, and its stability condition and dispersion equation are derived. The numerical dispersion characteristics of this method are analyzed in detail. In order to show its valid...
A STUDY OF CHARACTERISTICS OF WAVEGUIDE WITH ARBITRARY CROSS-SECTION VIA NON-ORTHOGONAL FINITE-DIFFERENCE FREQUENCY-DOMAIN METHOD
Zhao Li
1996, 18(1): 50-57.
Abstract:
A finite-difference frequency-domain(FD-FD) method in non-orthogonal coordinate is presented for the eigenvalue problems of waveguide. The numerical discrete mesh of the algorithm can fit the arbitrary boundary well. In this paper the cut-off frequen...
THE OPTIMIZATION METHOD FOR REDUCING CROSSTALK IN MULTI-CONDUCTOR CABLE
Liu Gang, Yang Weijie, Zhong Shunshi
1996, 18(1): 58-63.
Abstract:
Based on transmission line theory, the voltage transfer ratio function matrixes are derived for the multi-conductor cable system. Then an optimising object function for reducing crosstalk in the multi-conductor cable is established. The nonlinear pro...
VOICE/NON-VOICE DISCRIMINATION SYSTEM FOR PUBLIC COMMUNICATION NETWORKS
Hu Ruimin, Yao Tianren, Huang Tiexia, Li Deren
1996, 18(1): 72-76.
Abstract:
The features of non-voice signals on public communication nets are analysed and an approach to distinguish such signals is introduced in this paper. It is the first time for the system to meet three key targets: large-scale, high recognition rate and...
THE CHANNEL MODELING FOR TERRESTRIAL BROADCASTING OF HDTV
Mei Jianping, Quan Ziyi
1996, 18(1): 77-81.
Abstract:
A channel model specially applied to the terrestrial broadcasting of high definition tele-vision(HDTV) is presented on the base of analyzing some kinds of channel models over VHF/UHF. The model sufficiently concerns main interferences faced by HDTV s...
APPLYING MOVING ADAPTIVE INTERPOLATION TECHNIQUES TO IMPROVE THE VERTICAL RESOLUTION OF PICTURES IN TV
Li Xiaohui, Cheng Yulin
1996, 18(1): 82-86.
Abstract:
A method of moving adaptive picture interpolation is presented. The interlaced scanning that structures the pictures of today s television systems is changed to progressive scanning, thus vertical resolution of pictures is improved greatly.
MILLIMETER-WAVE FINLINE-MICROSTRIP OSCILLATOR
Xue Quan, Xue Liangjin, Lin Weigan
1996, 18(1): 87-89.
Abstract:
A new millimeter-wave integrated oscillator and design method are introduced in this paper. By combining finline and microstrip transmission line, this oscillator has more than 3.0 GHz mechanical tuning bandwidth and over 70.0mW output power.
RADAR CROSS-SECTION OF SIMPLY FACE-SHAPED TARGETS AND THEIR PHYSICAL SIMILARITY
Shi Zhendong, Liu Hongwei
1996, 18(1): 90-94.
Abstract:
Radar cross-section of targets varies with their configurations, dimensions, wavelength and radiation direction of waves. In this paper, a general representation for the radar cross-section of simply face-shaped scatterer with variance in these param...
MODEL TESTING METHOD OF RCS FOR LOSSY RADAR TARGETS
Liu Hongwei, Shi Zhendong, Tang Pu
1996, 18(1): 95-98.
Abstract:
A RCS model testing method for lossy radar targets fully or partially coated by absorbent materials is presented with its basical theory and programing technique. It is shown that this method is usable and practicable because the computed result by m...
KIRCHHOFF's FALTUNG FORMULA OF COMPLEX APERTURE AND COMPLEX RAY SIMULATION OF APERTURE RADIATION
Yao Dezhong
1996, 18(1): 99-103.
Abstract:
The Kirchhoff s faltung formula of complex aperture is proposed as a new method for radiation from a plane aperture. It is based on the idea of analytic extension that the original aperture field is extended to a complex plane, and then the Kirchhoff...
NON-DESTRUCTIVE CHARACTERIZATION OF MeV ION IMPLANTED SILICON
Yu Yuehui, Zhu Nanchang, Zou Shichang, Zhou Zhuying, Zhao Guoqing
1996, 18(1): 104-108.
Abstract:
Boron ions have been implanted into Si at an incident energy of 3MeV to a dose of 51015cm-2. Buried conductive layers are formed in Si substrate after annealing at 1050℃ for 20s. Annealing characteristics of damage has been examined by double-crystal...
CONTROLLING METALLIC IMPURITY AND MICRODEFECT IN SILICON CVD EPITAXY LAYER USING CONTRARY COMPENSATION
Liu Yuling, Wang Guizhen, Xu Xiaohui, Li Xiangdu, Zhang Zhihua
1996, 18(1): 109-112.
Abstract:
This paper analyzes the mechanism models of metallic impurity infection and adsorption-desorption, and the distribution law of microdefect in growing of silicon CVD epitaxy, and then a new epitaxy technology is proposed, which is optimized by using c...
Reviews
MULTIBEAM KLYSTRON-A NEW TYPE OF HIGH POWER MICROWAVE AMPLIFIER
Ding Yaogen, Peng Jun
1996, 18(1): 64-71.
Abstract:
A new type of high power microwave-multibeam klystron has been described. The development of multibeam klystron is commented on briefly, the principle and main characteristics of multibeam klystron based on the fundamental mode of klystron cavity are...