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1993 Vol. 15, No. 1
Display Method:
1993, 15(1): 1-6.
Abstract:
The problem considered in this paper is that of interpolating a virtual uniform linear array from a real two-dimensional array with arbitrary geometry via an interpolation matrix. Central to this problem is how ro place these virtual sensors. It is s...
The problem considered in this paper is that of interpolating a virtual uniform linear array from a real two-dimensional array with arbitrary geometry via an interpolation matrix. Central to this problem is how ro place these virtual sensors. It is s...
1993, 15(1): 7-16.
Abstract:
The logical feature of no-cary operations over GF(2m) and their logical network are discussed, on which generalized S arle operations are defined. The operations are applied to logical fast Walsh transformation over GF(2m), which facilitates further ...
The logical feature of no-cary operations over GF(2m) and their logical network are discussed, on which generalized S arle operations are defined. The operations are applied to logical fast Walsh transformation over GF(2m), which facilitates further ...
1993, 15(1): 17-25.
Abstract:
There are many kinds of special relationships between multiple-valued logical functions and their variables, and it is difficult to be judged from their expressions . In this paper, some sufficient and necessary conditions of the independence and sta...
There are many kinds of special relationships between multiple-valued logical functions and their variables, and it is difficult to be judged from their expressions . In this paper, some sufficient and necessary conditions of the independence and sta...
1993, 15(1): 26-32.
Abstract:
On the basis of target transfer function with the early-time and later-time responses together, a method for solving the target feature coefficients is investigated by utilizing the approximation theory and method. Then, the feature coefficients are ...
On the basis of target transfer function with the early-time and later-time responses together, a method for solving the target feature coefficients is investigated by utilizing the approximation theory and method. Then, the feature coefficients are ...
1993, 15(1): 33-37.
Abstract:
The Lindell formulation based on the generalized variational principle is derived, and an accurate variational analytical result of the measurement of the complex dielectric constant by the Rayleigh-Ritz method is obtained when the loss is small. The...
The Lindell formulation based on the generalized variational principle is derived, and an accurate variational analytical result of the measurement of the complex dielectric constant by the Rayleigh-Ritz method is obtained when the loss is small. The...
1993, 15(1): 38-44.
Abstract:
The characteristics of the cyclotron autoresonance maser with a large-orbit electron ring in a partially dielectric-loaded waveguide have been analyzed by making use of the linearized Vlasov- Maxweil equations. The results show that the dielectric li...
The characteristics of the cyclotron autoresonance maser with a large-orbit electron ring in a partially dielectric-loaded waveguide have been analyzed by making use of the linearized Vlasov- Maxweil equations. The results show that the dielectric li...
1993, 15(1): 45-51.
Abstract:
To solve the problem of reconstructing profiles of layered media (RPLM), at first a new time-domain mathematical model for EM wave propagation in lavered media is presented. Secondly, the problem for RPLM is reduced to a paramerer identification one ...
To solve the problem of reconstructing profiles of layered media (RPLM), at first a new time-domain mathematical model for EM wave propagation in lavered media is presented. Secondly, the problem for RPLM is reduced to a paramerer identification one ...
1993, 15(1): 52-59.
Abstract:
Formulas for the elastic and coherent inelastic scattering be an arbitrary body uniformly filled with active molecules are presentd with the method of eigenfunction expansion in the integral equation for scattering by dielectric body Agreement betwee...
Formulas for the elastic and coherent inelastic scattering be an arbitrary body uniformly filled with active molecules are presentd with the method of eigenfunction expansion in the integral equation for scattering by dielectric body Agreement betwee...
1993, 15(1): 75-78.
Abstract:
It is an active researching area to reconstruct the model of 3-dimensional object from cross-sectional images and to display its visible surfaces. In this paper, the theory and the method of reconstructing the model of 3-D object and displaving its v...
It is an active researching area to reconstruct the model of 3-dimensional object from cross-sectional images and to display its visible surfaces. In this paper, the theory and the method of reconstructing the model of 3-D object and displaving its v...
1993, 15(1): 79-82.
Abstract:
A nonideal second current conveyer (NCCII) is described. The circuit of NCCII constructed with operational transconductance amplifers (OTA) only is proposed. The current conveyer of this used as a circuit building block to realize capacitor and resis...
A nonideal second current conveyer (NCCII) is described. The circuit of NCCII constructed with operational transconductance amplifers (OTA) only is proposed. The current conveyer of this used as a circuit building block to realize capacitor and resis...
1993, 15(1): 83-87.
Abstract:
Based on L. F. Wei s work (1984), the generalized trellis diagram oftrellis codes is defined, then the properties of rotationally invariant trellis codes with two-dimensional QAM constellations are discussed, and all the unequivalent signal assignmen...
Based on L. F. Wei s work (1984), the generalized trellis diagram oftrellis codes is defined, then the properties of rotationally invariant trellis codes with two-dimensional QAM constellations are discussed, and all the unequivalent signal assignmen...
1993, 15(1): 88-91.
Abstract:
Modified Cassegrainian antenna with polarization rotator has been widely used in the airborne radar systems because of its electrical and structural advantages. Up to now, however, the scattering aspect of this antenna has not been systematically inv...
Modified Cassegrainian antenna with polarization rotator has been widely used in the airborne radar systems because of its electrical and structural advantages. Up to now, however, the scattering aspect of this antenna has not been systematically inv...
1993, 15(1): 92-97.
Abstract:
The Green s functions for electr ic and magnetic vector potentials in a sectoral wave guide and its cavity are derivated by using the separation of variables, Fourier transform and residue theory.
The Green s functions for electr ic and magnetic vector potentials in a sectoral wave guide and its cavity are derivated by using the separation of variables, Fourier transform and residue theory.
1993, 15(1): 98-102.
Abstract:
The measurement of reflection from an open-ended coaxial line is a simple and nondestructive technique of determining the dielectric property of materials. The electromagnetic field in the vicinity of the aperture is studied by means of rigorous fiel...
The measurement of reflection from an open-ended coaxial line is a simple and nondestructive technique of determining the dielectric property of materials. The electromagnetic field in the vicinity of the aperture is studied by means of rigorous fiel...
1993, 15(1): 103-107.
Abstract:
The applicability of the assumption, the surface photo-voltage is a monotonic function of the surface excess minority carrier density, to epitaxial material is studied by numerical analysis method. It is found that this assumption is unreasonable for...
The applicability of the assumption, the surface photo-voltage is a monotonic function of the surface excess minority carrier density, to epitaxial material is studied by numerical analysis method. It is found that this assumption is unreasonable for...
1993, 15(1): 108-112.
Abstract:
The magnetic detector made of aamorphous soft magnetic film cores has better characteristics. Experimental results indicate that the detector has a good linear relation between the double-frequency single voltage output and the magnetic field, a magn...
The magnetic detector made of aamorphous soft magnetic film cores has better characteristics. Experimental results indicate that the detector has a good linear relation between the double-frequency single voltage output and the magnetic field, a magn...
1993, 15(1): 60-68.
Abstract:
Progress in the research area of photoconductive semiconductor switches is reviewed. The recent development of photoconductive materials, the generation of high-power pulse and its application, the measurement technology using ultrashort electromagne...
Progress in the research area of photoconductive semiconductor switches is reviewed. The recent development of photoconductive materials, the generation of high-power pulse and its application, the measurement technology using ultrashort electromagne...
1993, 15(1): 69-74.
Abstract:
The field of low-noise elecronics and noise circuit theory are described svntheti-cally. Some imperfections of the current noise circuit theories are pointed out. And the research direction and the methods of development of noise circuit theory and n...
The field of low-noise elecronics and noise circuit theory are described svntheti-cally. Some imperfections of the current noise circuit theories are pointed out. And the research direction and the methods of development of noise circuit theory and n...
