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1998 Vol. 20, No. 5
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1998, 20(5): 577-583.
Abstract:
In this paper, a novel idea for optimization of image segmentation algorithms based on algorithm evaluation is proposed. According to this idea, a segmentation expert system is designed and realized. Experimental results show that such an idea is fea...
In this paper, a novel idea for optimization of image segmentation algorithms based on algorithm evaluation is proposed. According to this idea, a segmentation expert system is designed and realized. Experimental results show that such an idea is fea...
1998, 20(5): 584-590.
Abstract:
Sub-image information of the wavelet decomposed finger print image is essential to the quality of reconstructed image. This paper describes the importance of the sub-images according to the features of ringer print images, and provides a new method t...
Sub-image information of the wavelet decomposed finger print image is essential to the quality of reconstructed image. This paper describes the importance of the sub-images according to the features of ringer print images, and provides a new method t...
1998, 20(5): 591-596.
Abstract:
A new predictive search (PSA) algorithm is proposed in this paper, where the search displacements are between -16 to +15.5. It firstly derives motion vector from the linear weighting of motion vectors of the three adjacent blocks, then searches from ...
A new predictive search (PSA) algorithm is proposed in this paper, where the search displacements are between -16 to +15.5. It firstly derives motion vector from the linear weighting of motion vectors of the three adjacent blocks, then searches from ...
1998, 20(5): 597-603.
Abstract:
The concept of instantaneous frequency(IF) and its traditional construct method--analytic method are introduced in this paper.Then by means of joint time-frequency analysis,the fphysical meaning of IF and its relation with the time-frequency distribu...
The concept of instantaneous frequency(IF) and its traditional construct method--analytic method are introduced in this paper.Then by means of joint time-frequency analysis,the fphysical meaning of IF and its relation with the time-frequency distribu...
1998, 20(5): 604-610.
Abstract:
Wavelet neural networks (WNN) is a powerful tool for function approximation. In this paper a new model named adaptive time delay WNN(ATDWNN) is proposed which combines time delay neural network and wavelet decomposition. ATDWNN is used to approximate...
Wavelet neural networks (WNN) is a powerful tool for function approximation. In this paper a new model named adaptive time delay WNN(ATDWNN) is proposed which combines time delay neural network and wavelet decomposition. ATDWNN is used to approximate...
1998, 20(5): 611-618.
Abstract:
In this paper, the estimation of attraction region for a given equilibrium position of associative memories is given with Lyapunov function method. It is very important for the implementation of associative memories and optimization with neural netwo...
In this paper, the estimation of attraction region for a given equilibrium position of associative memories is given with Lyapunov function method. It is very important for the implementation of associative memories and optimization with neural netwo...
1998, 20(5): 619-624.
Abstract:
The performance of DOA estimation will be distorted in the presence of dielectric dome in the Dielectric Dome Array(DDA) because the dielectric dome diverge the planar wavefront into non-planar wavefront inside it. We proposed a far field approximati...
The performance of DOA estimation will be distorted in the presence of dielectric dome in the Dielectric Dome Array(DDA) because the dielectric dome diverge the planar wavefront into non-planar wavefront inside it. We proposed a far field approximati...
1998, 20(5): 625-630.
Abstract:
A kind of Chinese combined language model,that takes into account POS(part of speech)information in a trigram-based statistical language model, is presented in this paper. The theoretical analysis and experiments all show that the model not only is l...
A kind of Chinese combined language model,that takes into account POS(part of speech)information in a trigram-based statistical language model, is presented in this paper. The theoretical analysis and experiments all show that the model not only is l...
1998, 20(5): 631-640.
Abstract:
The relation between weight and sidelobes of cross-correlation function and the relations between Hamming distance and numbers in a sequence are systematically studied in this paper. And then the general-purpose weight theorem and Hamming distance th...
The relation between weight and sidelobes of cross-correlation function and the relations between Hamming distance and numbers in a sequence are systematically studied in this paper. And then the general-purpose weight theorem and Hamming distance th...
1998, 20(5): 641-647.
Abstract:
This paper presents one certain chaotic radar waveforms based on one-dimensional chaotic sequences.This paper derives theoretically the formulae of the ambiguity functions of two casess,i.e.,(1) continuous chaotic radar waveforms;(2)rectangular pulss...
This paper presents one certain chaotic radar waveforms based on one-dimensional chaotic sequences.This paper derives theoretically the formulae of the ambiguity functions of two casess,i.e.,(1) continuous chaotic radar waveforms;(2)rectangular pulss...
1998, 20(5): 648-654.
Abstract:
In this paper, the main schemes of connection admission control (CAC) in ATM networks are briefly overviewed especially the principle of dynamic bandwidth allocation. Then the fair share of the bandwidth among different traffic sources is analyzed ba...
In this paper, the main schemes of connection admission control (CAC) in ATM networks are briefly overviewed especially the principle of dynamic bandwidth allocation. Then the fair share of the bandwidth among different traffic sources is analyzed ba...
1998, 20(5): 655-662.
Abstract:
Firstly, some reduction operations of marked T-graph with weights are given in this paper. Then the conditions for preserving liveness of marked T-graph with weights after these operations are discussed. These conclusions have important significance ...
Firstly, some reduction operations of marked T-graph with weights are given in this paper. Then the conditions for preserving liveness of marked T-graph with weights after these operations are discussed. These conclusions have important significance ...
1998, 20(5): 663-668.
Abstract:
The relativistic effects on point-positioning precision in the GPS are studied with reference to an earth centered inertial coordinate system. First, the metric coefficient 900 in the earth centered inertial system is obtained from the sun s Schwarzs...
The relativistic effects on point-positioning precision in the GPS are studied with reference to an earth centered inertial coordinate system. First, the metric coefficient 900 in the earth centered inertial system is obtained from the sun s Schwarzs...
1998, 20(5): 669-675.
Abstract:
In this paper, a novel computer-aided autodevelopment method of analog integrated circuit macromodel is presented. The new method can be employed generally, and the macromodel autodeveloped is accurate. The autodevelopment procedure of macromodel is ...
In this paper, a novel computer-aided autodevelopment method of analog integrated circuit macromodel is presented. The new method can be employed generally, and the macromodel autodeveloped is accurate. The autodevelopment procedure of macromodel is ...
1998, 20(5): 676-681.
Abstract:
A noise network model of single-mode semiconductor laser diode is established based on the Harder LD small signal noise model and straightforward calculation of rate equation in the TMS software. The characteristics of frequency response and noise ar...
A noise network model of single-mode semiconductor laser diode is established based on the Harder LD small signal noise model and straightforward calculation of rate equation in the TMS software. The characteristics of frequency response and noise ar...
1998, 20(5): 682-688.
Abstract:
Making use of the linear field theory, the dielectric Cherenkov maser with an annular plasma is analysed in detail. The beam-wave interactions corresponding to, (a) the thin annular relativistic electron beam (TAREB) surrounding the annular plasma, (...
Making use of the linear field theory, the dielectric Cherenkov maser with an annular plasma is analysed in detail. The beam-wave interactions corresponding to, (a) the thin annular relativistic electron beam (TAREB) surrounding the annular plasma, (...
1998, 20(5): 689-693.
Abstract:
Dielectric conformal dome phased array antenna uses the dielectric dome to change the direction of the scanning beam. It is supposed to widen the scan-range of planar phased array to half spherical space or more. It is suitable for missiles and air-b...
Dielectric conformal dome phased array antenna uses the dielectric dome to change the direction of the scanning beam. It is supposed to widen the scan-range of planar phased array to half spherical space or more. It is suitable for missiles and air-b...
1998, 20(5): 694-698.
Abstract:
In this paper the theoretical basis of cellular neural networks first created by L. O. Chua(1988) are discussed. Some fault are shown, new research method are suggested.
In this paper the theoretical basis of cellular neural networks first created by L. O. Chua(1988) are discussed. Some fault are shown, new research method are suggested.
1998, 20(5): 699-702.
Abstract:
In this paper, fractal image coding and fractal interpolation for image compression are studied at first. Because the reconstructed image quality using the two methods at high compression is not good, a new image compression idea combining these two ...
In this paper, fractal image coding and fractal interpolation for image compression are studied at first. Because the reconstructed image quality using the two methods at high compression is not good, a new image compression idea combining these two ...
1998, 20(5): 703-707.
Abstract:
In this paper, lapped orthogonal transform(LOT) is applied to orthogonal frequency division multiplexing(OFDM) system for modulation and demodulation, and a new OFDM scheme is proposed. The performance comparison between the new scheme and traditiona...
In this paper, lapped orthogonal transform(LOT) is applied to orthogonal frequency division multiplexing(OFDM) system for modulation and demodulation, and a new OFDM scheme is proposed. The performance comparison between the new scheme and traditiona...
1998, 20(5): 708-711.
Abstract:
The spatial Fourier decomposition method is a new method for the SAR imaging. It incorporates the spherical nature of the radar s radiation pattern and so the image would not distort even at near field. This paper presents an algorithm for the spatia...
The spatial Fourier decomposition method is a new method for the SAR imaging. It incorporates the spherical nature of the radar s radiation pattern and so the image would not distort even at near field. This paper presents an algorithm for the spatia...
1998, 20(5): 712-715.
Abstract:
A method for rapidly determining long generation lifetime under linear voltage sweep was presented. The C-t transient curve needs not to reach saturation. The data processing is simple. Furthermore, it needs not to know the sample s impurity density.
A method for rapidly determining long generation lifetime under linear voltage sweep was presented. The C-t transient curve needs not to reach saturation. The data processing is simple. Furthermore, it needs not to know the sample s impurity density.
1998, 20(5): 716-720.
Abstract:
Two universal integrator-based CC (Current Conveyor) network configurations are presented. The architectures proposed are constructed using a canonical FLF (Follow-the-Leader Feedback) configuration with an input distribution and output summation CC ...
Two universal integrator-based CC (Current Conveyor) network configurations are presented. The architectures proposed are constructed using a canonical FLF (Follow-the-Leader Feedback) configuration with an input distribution and output summation CC ...
