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1990 Vol. 12, No. 4
Display Method:
1990, 12(4): 337-343.
Abstract:
Linear octrees offer a volume representation of 3-Dobjects, which is quite compact and lends itself to traditional object processing operations. However, the linear octree structure for generating the representation of 3-D objects from three orthogon...
Linear octrees offer a volume representation of 3-Dobjects, which is quite compact and lends itself to traditional object processing operations. However, the linear octree structure for generating the representation of 3-D objects from three orthogon...
1990, 12(4): 344-351.
Abstract:
Starting from an index mapping for one to multi-dimensions, a general in-place and in-order prime factor FFT algorithm is proposed. Comparing with existing prime factor FFT algorithms, this algorithm saves about half of the storage and possesses a hi...
Starting from an index mapping for one to multi-dimensions, a general in-place and in-order prime factor FFT algorithm is proposed. Comparing with existing prime factor FFT algorithms, this algorithm saves about half of the storage and possesses a hi...
1990, 12(4): 352-360.
Abstract:
A new generalized measurement equation for multi-port lossless network is developed. In two-port case, it is reduced as a triangle function in the paper [1]. As an example, expefemental data are given for a H-plane T three-port network.
A new generalized measurement equation for multi-port lossless network is developed. In two-port case, it is reduced as a triangle function in the paper [1]. As an example, expefemental data are given for a H-plane T three-port network.
1990, 12(4): 361-368.
Abstract:
The calculation formulas of monostatic radar cross-section (RCS) of arbitrary reflectors with arbitrarily polarized plane-wave incidence are derived, where the specular field is obtained by geometrical optics and the edge-diffracted field is calculat...
The calculation formulas of monostatic radar cross-section (RCS) of arbitrary reflectors with arbitrarily polarized plane-wave incidence are derived, where the specular field is obtained by geometrical optics and the edge-diffracted field is calculat...
1990, 12(4): 369-377.
Abstract:
A new type of current model, defined as node nuit current model, for calculating current distribution on arbitrary shape conductors is presented. By using this model, the number of unknowns necessary for MM solution of current distribution is decreas...
A new type of current model, defined as node nuit current model, for calculating current distribution on arbitrary shape conductors is presented. By using this model, the number of unknowns necessary for MM solution of current distribution is decreas...
1990, 12(4): 378-384.
Abstract:
An improved perturbation procedure is used for analysing the radiation characteristics of the millimeter wave dielectric leaky wave grating antenna. The electromagnetic fields are described in terms of a transverse transmission line network, which br...
An improved perturbation procedure is used for analysing the radiation characteristics of the millimeter wave dielectric leaky wave grating antenna. The electromagnetic fields are described in terms of a transverse transmission line network, which br...
1990, 12(4): 385-392.
Abstract:
A system is presented in which the equivalent lumped circuit approach and S parameter approach are in conjunction with the electromagnetic field analysis on dielectric resonator (DR) coupling with microstrip. Theoretical calculations agree well with ...
A system is presented in which the equivalent lumped circuit approach and S parameter approach are in conjunction with the electromagnetic field analysis on dielectric resonator (DR) coupling with microstrip. Theoretical calculations agree well with ...
1990, 12(4): 393-401.
Abstract:
A new method, termed netwok model decomposition method, is presented for the evaluation of cut-off frequencies of an arbitrary shaped waveguide with arbitrary filling. Through discreting the region studied, a topological model and the corresponding n...
A new method, termed netwok model decomposition method, is presented for the evaluation of cut-off frequencies of an arbitrary shaped waveguide with arbitrary filling. Through discreting the region studied, a topological model and the corresponding n...
1990, 12(4): 402-414.
Abstract:
The misalignment assembling error effect of lenses and deflectors and its evaluation in electron beam focusing and deflection systems are discussed. First the electrostatic and magnetic field expression in electron beam systems due to the misaligned ...
The misalignment assembling error effect of lenses and deflectors and its evaluation in electron beam focusing and deflection systems are discussed. First the electrostatic and magnetic field expression in electron beam systems due to the misaligned ...
1990, 12(4): 415-417.
Abstract:
C-V and I-V characteristics of ultratllin metal/LB insulating films/semiconductor structure are studied. Theoretical analysis are well in accord with experimental results. The results indicate that: (1) Ultrathin MLS structure has normal C-V and I-V ...
C-V and I-V characteristics of ultratllin metal/LB insulating films/semiconductor structure are studied. Theoretical analysis are well in accord with experimental results. The results indicate that: (1) Ultrathin MLS structure has normal C-V and I-V ...
1990, 12(4): 418-423.
Abstract:
The emission and surface characteristics of a dispenser cathode coaled with Re are studied. It is found that the dispenser cathode coated with Re has both higher current density and more uniform distribution of emission than the S type cathode. The A...
The emission and surface characteristics of a dispenser cathode coaled with Re are studied. It is found that the dispenser cathode coated with Re has both higher current density and more uniform distribution of emission than the S type cathode. The A...
1990, 12(4): 424-430.
Abstract:
By introducing a parameter, which is the length of the voltage-current characteristic curve of piecewise-linear resistor, into the description of the characteristics of the resistor, it is possible to analyze a piecewise linear resistive network topo...
By introducing a parameter, which is the length of the voltage-current characteristic curve of piecewise-linear resistor, into the description of the characteristics of the resistor, it is possible to analyze a piecewise linear resistive network topo...
1990, 12(4): 431-435.
Abstract:
A new texture analysis method on image-fast eigenfiltering method is presented.Based on eigenfilters proposed by Ade, with which the eigenvalues of the real symmetric matrix represent distribution of the eigenvectors related to the matrix, and by usi...
A new texture analysis method on image-fast eigenfiltering method is presented.Based on eigenfilters proposed by Ade, with which the eigenvalues of the real symmetric matrix represent distribution of the eigenvectors related to the matrix, and by usi...
1990, 12(4): 436-439.
Abstract:
The (n, F, k) system consists of n components. If the number of failed component is more than F, or the number of adjacent failed component is more than K, tken the system fails. A recursive formula for computing reliability of the system is presente...
The (n, F, k) system consists of n components. If the number of failed component is more than F, or the number of adjacent failed component is more than K, tken the system fails. A recursive formula for computing reliability of the system is presente...
1990, 12(4): 440-445.
Abstract:
The equivalent series reactance and parallel susceptance of a small conclucring foreign body in the rectangular waveguides are derived by using perturbational formula in the rectangular cavity and combining with quasi-static approximation. The expres...
The equivalent series reactance and parallel susceptance of a small conclucring foreign body in the rectangular waveguides are derived by using perturbational formula in the rectangular cavity and combining with quasi-static approximation. The expres...
1990, 12(4): 446-448.
Abstract:
In the surface analysis and the manufacture of photocathode the cesium ion source shows some advantages as compared with the neutral cesium source. According to the principle of surface ionization, a cesium ion source is manufactured with porous tung...
In the surface analysis and the manufacture of photocathode the cesium ion source shows some advantages as compared with the neutral cesium source. According to the principle of surface ionization, a cesium ion source is manufactured with porous tung...
