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2008 Vol. 30, No. 3
Display Method:
2008, 30(3): 509-513.
doi: 10.3724/SP.J.1146.2007.00511
Abstract:
In this paper, an image denoising model which embeds intrinsic mode function into Perona-Malik model is proposed. Firstly, the image is decomposed into Intrinsic Mode Functions (IMFs) by using empirical mode decomposition technique; each of IMFs capt...
In this paper, an image denoising model which embeds intrinsic mode function into Perona-Malik model is proposed. Firstly, the image is decomposed into Intrinsic Mode Functions (IMFs) by using empirical mode decomposition technique; each of IMFs capt...
2008, 30(3): 514-517.
doi: 10.3724/SP.J.1146.2006.01051
Abstract:
Colorization of grayscale image is in general an active and challenging area of research in image processing. In this paper, current colorization algorithms are summarized. Then a colorization algorithm based on unevenness is proposed. According to t...
Colorization of grayscale image is in general an active and challenging area of research in image processing. In this paper, current colorization algorithms are summarized. Then a colorization algorithm based on unevenness is proposed. According to t...
2008, 30(3): 518-523.
doi: 10.3724/SP.J.1146.2006.01303
Abstract:
According to scaled real Digital Elevation Maps (DEM) information, sets of Single Look Complex (SLC) SAR images are simulated for interferometric missions, based on the SAR imaging mechanism and scattering model of two-scale rough surface. On the bas...
According to scaled real Digital Elevation Maps (DEM) information, sets of Single Look Complex (SLC) SAR images are simulated for interferometric missions, based on the SAR imaging mechanism and scattering model of two-scale rough surface. On the bas...
2008, 30(3): 524-528.
doi: 10.3724/SP.J.1146.2007.00888
Abstract:
Image denoising is one of important technology in image processing. The denoising image can be gotten by shrink the amplitude of wavelet coefficient of noise according to the fact that it is smaller than others in Wavelet Shrinkage (WS). The Anisotro...
Image denoising is one of important technology in image processing. The denoising image can be gotten by shrink the amplitude of wavelet coefficient of noise according to the fact that it is smaller than others in Wavelet Shrinkage (WS). The Anisotro...
2008, 30(3): 529-533.
doi: 10.3724/SP.J.1146.2006.01344
Abstract:
A Chaos Particle Swarm Optimization (CPSO) algorithm is presented. The initial location of the particle is evaluated by chaos. During the running time, according to the variance of the populations fitness, the chaotic location update of the particle ...
A Chaos Particle Swarm Optimization (CPSO) algorithm is presented. The initial location of the particle is evaluated by chaos. During the running time, according to the variance of the populations fitness, the chaotic location update of the particle ...
2008, 30(3): 534-538.
doi: 10.3724/SP.J.1146.2006.01199
Abstract:
Using a statistical approach, data fusion is performed in image feature detection with which information about the same feature obtained by multiple methods can be integrated. Validity of the described fusion scheme and properties of the fused data a...
Using a statistical approach, data fusion is performed in image feature detection with which information about the same feature obtained by multiple methods can be integrated. Validity of the described fusion scheme and properties of the fused data a...
2008, 30(3): 539-541.
doi: 10.3724/SP.J.1146.2006.01258
Abstract:
Illumination and pose variations make the performance of the Locality Preserving Projections (LPP)in face recognition decrease. To solve the problem, a supervised LPP using discriminant information is presented in this paper, the proposal calls for t...
Illumination and pose variations make the performance of the Locality Preserving Projections (LPP)in face recognition decrease. To solve the problem, a supervised LPP using discriminant information is presented in this paper, the proposal calls for t...
2008, 30(3): 542-545.
doi: 10.3724/SP.J.1146.2006.00982
Abstract:
Taking into account target tracking in high-density clutter, first the modified PDA algorithm (MPDA) is presented, then its performance estimation is obtained by using HYbrid Conditional Averaging(HYCA)approach, which gives us a series of off-line re...
Taking into account target tracking in high-density clutter, first the modified PDA algorithm (MPDA) is presented, then its performance estimation is obtained by using HYbrid Conditional Averaging(HYCA)approach, which gives us a series of off-line re...
2008, 30(3): 546-549.
doi: 10.3724/SP.J.1146.2006.01047
Abstract:
An irrelevant Amplitude-Phase (AP) algorithm is used in raw data compression according to the bulky raw data of Interferometric Synthetic Aperture Radar(INSAR) system. The new algorithm is based on the statistical property and the high correlation be...
An irrelevant Amplitude-Phase (AP) algorithm is used in raw data compression according to the bulky raw data of Interferometric Synthetic Aperture Radar(INSAR) system. The new algorithm is based on the statistical property and the high correlation be...
2008, 30(3): 550-553.
doi: 10.3724/SP.J.1146.2006.01173
Abstract:
For Very High Frequency/Ultra High Frequency(VHF/UHF) Ultra-WideBand Synthetic Aperture Radar (UWB SAR) the Radio Frequency Interference(RFI) may degrade the SAR image. In this paper a method based on channel equalization is proposed to remove the RF...
For Very High Frequency/Ultra High Frequency(VHF/UHF) Ultra-WideBand Synthetic Aperture Radar (UWB SAR) the Radio Frequency Interference(RFI) may degrade the SAR image. In this paper a method based on channel equalization is proposed to remove the RF...
2008, 30(3): 554-558.
doi: 10.3724/SP.J.1146.2006.01198
Abstract:
This paper presents a new method for synthetic aperture radar images feature extraction and target recognition which based on principal component analysis in wavelet domain and support vector machine. After wavelet decomposition of a SAR image, featu...
This paper presents a new method for synthetic aperture radar images feature extraction and target recognition which based on principal component analysis in wavelet domain and support vector machine. After wavelet decomposition of a SAR image, featu...
2008, 30(3): 559-563.
doi: 10.3724/SP.J.1146.2006.01025
Abstract:
Sawtooth signals are transmitted and received continuously in FMCW-SAR, which makes the character of the echo of FMCW-SAR is different from pulsed SAR. Combined with the imaging principle of FMCW-SAR, the influence of Doppler effect on FMCW-SAR imagi...
Sawtooth signals are transmitted and received continuously in FMCW-SAR, which makes the character of the echo of FMCW-SAR is different from pulsed SAR. Combined with the imaging principle of FMCW-SAR, the influence of Doppler effect on FMCW-SAR imagi...
2008, 30(3): 564-568.
doi: 10.3724/SP.J.1146.2006.01287
Abstract:
The coherent time of echo signal of ocean surface is much different from that of land because of its stochastic movement, which is related to the system parameters designation. The ocean echo signal coherent time of bistatic SAR is studied in this pa...
The coherent time of echo signal of ocean surface is much different from that of land because of its stochastic movement, which is related to the system parameters designation. The ocean echo signal coherent time of bistatic SAR is studied in this pa...
2008, 30(3): 569-572.
doi: 10.3724/SP.J.1146.2006.01285
Abstract:
This paper proposes a compression method for Synthetic Aperture Radar (SAR) raw data，which is based on time-frequency analysis theory and the linear frequency modulation properties of the SAR raw data. In this method, the raw data of I and Q channels...
This paper proposes a compression method for Synthetic Aperture Radar (SAR) raw data，which is based on time-frequency analysis theory and the linear frequency modulation properties of the SAR raw data. In this method, the raw data of I and Q channels...
2008, 30(3): 573-575.
doi: 10.3724/SP.J.1146.2006.01252
Abstract:
Medium PRF and N/M detection rule is the general working model of airborne pulse Doppler radar, it is necessary to satisfy the demand that medium pulse repetition frequency(PRF) set can solve ambiguities of range and Doppler, besides the demand, the ...
Medium PRF and N/M detection rule is the general working model of airborne pulse Doppler radar, it is necessary to satisfy the demand that medium pulse repetition frequency(PRF) set can solve ambiguities of range and Doppler, besides the demand, the ...
2008, 30(3): 576-580.
doi: 10.3724/SP.J.1146.2006.01340
Abstract:
To achieve fast location of moving emitter by a single stationary observer, an algorithm of hybrid particle filter based on bearing constrained sampling is presented. The algorithm gets proposal importance density from Extended Kalman Filter(EKF), an...
To achieve fast location of moving emitter by a single stationary observer, an algorithm of hybrid particle filter based on bearing constrained sampling is presented. The algorithm gets proposal importance density from Extended Kalman Filter(EKF), an...
2008, 30(3): 581-584.
doi: 10.3724/SP.J.1146.2006.01309
Abstract:
To solve the real-time and reliability problem of the underwater maneuver target tracking, according to the features of under maneuver target motion, namely, slow speed and weak motion capability, the mixing filter between pattern space and measureme...
To solve the real-time and reliability problem of the underwater maneuver target tracking, according to the features of under maneuver target motion, namely, slow speed and weak motion capability, the mixing filter between pattern space and measureme...
2008, 30(3): 585-588.
doi: 10.3724/SP.J.1146.2006.01263
Abstract:
Sampling Matrix Inversion (SMI) beamforming technique has the worse performance in the small snapshot number, high signal-noise- ratio and coherent source. Diagonal loading technique can improve the beamforming aberration. But loading value is hard t...
Sampling Matrix Inversion (SMI) beamforming technique has the worse performance in the small snapshot number, high signal-noise- ratio and coherent source. Diagonal loading technique can improve the beamforming aberration. But loading value is hard t...
2008, 30(3): 589-592.
doi: 10.3724/SP.J.1146.2006.01273
Abstract:
In this paper, a time-domain blind source separation algorithm for non-stationary convolutive mixtures is proposed by reprogramming the vectors of convolutive mixture model and generalizing the joint approximate diagonalization method. Firstly the sa...
In this paper, a time-domain blind source separation algorithm for non-stationary convolutive mixtures is proposed by reprogramming the vectors of convolutive mixture model and generalizing the joint approximate diagonalization method. Firstly the sa...
2008, 30(3): 593-595.
doi: 10.3724/SP.J.1146.2006.01278
Abstract:
Based on the point that directed diffusion equation is a diffusion process with direction, the correlation between directed diffusion and wavelet transform is studied in this paper. At first, the last low-frequency image after wavelet decomposition c...
Based on the point that directed diffusion equation is a diffusion process with direction, the correlation between directed diffusion and wavelet transform is studied in this paper. At first, the last low-frequency image after wavelet decomposition c...
2008, 30(3): 596-599.
doi: 10.3724/SP.J.1146.2006.01203
Abstract:
In this paper, based on Second-Order Statistics (SOS), a new algorithm is proposed for jointly estimating ranges, frequencies and Direction-Of-Arrival (DOA) of multiple near-field narrowband sources. The proposed method constructs three matrices usin...
In this paper, based on Second-Order Statistics (SOS), a new algorithm is proposed for jointly estimating ranges, frequencies and Direction-Of-Arrival (DOA) of multiple near-field narrowband sources. The proposed method constructs three matrices usin...
2008, 30(3): 600-603.
doi: 10.3724/SP.J.1146.2006.01182
Abstract:
The main influence for the performance of finite length Low-Density Parity-Check(LDPC) codes is analyzed. According to optimum choice for degree distribution, a check matrix is constructed with improved Progressive-Edge-Growth (PEG) algorithm. A prac...
The main influence for the performance of finite length Low-Density Parity-Check(LDPC) codes is analyzed. According to optimum choice for degree distribution, a check matrix is constructed with improved Progressive-Edge-Growth (PEG) algorithm. A prac...
2008, 30(3): 604-606.
doi: 10.3724/SP.J.1146.2007.00409
Abstract:
A general method is presented for synthesis of quasi-elliptic filter with source-load coupling. The equivalent circuit of the low-pass prototype of a lossless coupled resonator filter is proposed, as well as its transfer function t (s ).The expressio...
A general method is presented for synthesis of quasi-elliptic filter with source-load coupling. The equivalent circuit of the low-pass prototype of a lossless coupled resonator filter is proposed, as well as its transfer function t (s ).The expressio...
2008, 30(3): 607-611.
doi: 10.3724/SP.J.1146.2006.01286
Abstract:
This paper provides an overview of broadband satellite communication networks based on Digital Video Broadcasting-Return Channel System (DVB-RCS) standard, with an emphasis on the dynamic allocation of multi-access channel. A novel combined Demand As...
This paper provides an overview of broadband satellite communication networks based on Digital Video Broadcasting-Return Channel System (DVB-RCS) standard, with an emphasis on the dynamic allocation of multi-access channel. A novel combined Demand As...
2008, 30(3): 612-615.
doi: 10.3724/SP.J.1146.2006.01294
Abstract:
This paper studies the power allocation problem in a cooperative diversity system with multi-relays based on decode-and-forward in fading channels. The system model assumes both the source and the destination have the complete Channel State Informati...
This paper studies the power allocation problem in a cooperative diversity system with multi-relays based on decode-and-forward in fading channels. The system model assumes both the source and the destination have the complete Channel State Informati...
2008, 30(3): 616-620.
doi: 10.3724/SP.J.1146.2006.01206
Abstract:
This paper proposes an intuitive modeling of a prior information with Signal-to-Noise-Ratio (SNR) mismatch for Bit-Interleaved Coded Modulation with Iterative Decoding (BICM-ID) systems. The extrinsic information transfer chart is applied to analyze ...
This paper proposes an intuitive modeling of a prior information with Signal-to-Noise-Ratio (SNR) mismatch for Bit-Interleaved Coded Modulation with Iterative Decoding (BICM-ID) systems. The extrinsic information transfer chart is applied to analyze ...
2008, 30(3): 621-624.
doi: 10.3724/SP.J.1146.2006.01189
Abstract:
In HF communication, the signals suffer from the effect of delay spread, time-varying interference and additive Gaussian noise. The performance of conventional differential demodulator is very poor in bad HF channel. A novel frequency domain differen...
In HF communication, the signals suffer from the effect of delay spread, time-varying interference and additive Gaussian noise. The performance of conventional differential demodulator is very poor in bad HF channel. A novel frequency domain differen...
2008, 30(3): 625-629.
doi: 10.3724/SP.J.1146.2006.01315
Abstract:
To further reduce the redundancy of the existing non-exhaustive list MAP detection algorithms, which is induced by defining a fixed and large list size, an Adaptive Size List Sphere Decoding (ASLSD) algorithm is proposed. Through updating radius and ...
To further reduce the redundancy of the existing non-exhaustive list MAP detection algorithms, which is induced by defining a fixed and large list size, an Adaptive Size List Sphere Decoding (ASLSD) algorithm is proposed. Through updating radius and ...
2008, 30(3): 630-633.
doi: 10.3724/SP.J.1146.2006.01411
Abstract:
A novel algorithm is proposed in this literature to estimate the transmit and receive antenna correlation matrix, RT and RR, in MIMO system. Theoretical analysis indicates that the estimation performance is improved when more training number is used....
A novel algorithm is proposed in this literature to estimate the transmit and receive antenna correlation matrix, RT and RR, in MIMO system. Theoretical analysis indicates that the estimation performance is improved when more training number is used....
2008, 30(3): 634-637.
doi: 10.3724/SP.J.1146.2006.01387
Abstract:
MIMO technology can utilize spatial multiplexing in link level or use multiuser scheduling in system level to increase system capacity. However it is not enough only to optimize the performance of link level or only to schedule the multiuser in syste...
MIMO technology can utilize spatial multiplexing in link level or use multiuser scheduling in system level to increase system capacity. However it is not enough only to optimize the performance of link level or only to schedule the multiuser in syste...
2008, 30(3): 638-642.
doi: 10.3724/SP.J.1146.2006.01162
Abstract:
A new fairness criterion based on the joint optimization of the physical layer and the MAC layer is proposed in this paper. It is suitable for both the real-time traffic and the non-real-time traffic. According to the criterion a new cross-layer reso...
A new fairness criterion based on the joint optimization of the physical layer and the MAC layer is proposed in this paper. It is suitable for both the real-time traffic and the non-real-time traffic. According to the criterion a new cross-layer reso...
2008, 30(3): 643-647.
doi: 10.3724/SP.J.1146.2006.01244
Abstract:
The Joint Probability Density Function (JPDF) of signal envelope and its derivative, which is subjected to composite fading, is analyzed by means of conditional probability density. New uniform expressions for the average Level Crossing Rate (LCR) an...
The Joint Probability Density Function (JPDF) of signal envelope and its derivative, which is subjected to composite fading, is analyzed by means of conditional probability density. New uniform expressions for the average Level Crossing Rate (LCR) an...
2008, 30(3): 648-651.
doi: 10.3724/SP.J.1146.2006.01229
Abstract:
Multi-Channel Decision Feedback Equalizer (MC-DFE) is the main method to overcome multipath fading and eliminate Inter-Symbol Interference (ISI) for underwater acoustic coherent communications. To reduce computational complexity and improve the preci...
Multi-Channel Decision Feedback Equalizer (MC-DFE) is the main method to overcome multipath fading and eliminate Inter-Symbol Interference (ISI) for underwater acoustic coherent communications. To reduce computational complexity and improve the preci...
2008, 30(3): 652-655.
doi: 10.3724/SP.J.1146.2006.01194
Abstract:
Based on the relationship between the extension Galois fields and the prime Galois fields, this paper presents a new construction of frequency-hopping sequences, here designated as general quadratic prime codes, by expanding the construct idea of pri...
Based on the relationship between the extension Galois fields and the prime Galois fields, this paper presents a new construction of frequency-hopping sequences, here designated as general quadratic prime codes, by expanding the construct idea of pri...
2008, 30(3): 656-659.
doi: 10.3724/SP.J.1146.2006.01236
Abstract:
The array calibration for spreading communication system is discussed in this paper. Based on both PARAFAC and array rotation, an array calibration approach is proposed. This calibration approach is employing auxiliary spreading code signal, PARAFAC ...
The array calibration for spreading communication system is discussed in this paper. Based on both PARAFAC and array rotation, an array calibration approach is proposed. This calibration approach is employing auxiliary spreading code signal, PARAFAC ...
2008, 30(3): 660-664.
doi: 10.3724/SP.J.1146.2007.00117
Abstract:
Plateaued functions include Bent functions and partially bent functions, but are wider than them. They have good cryptographic properties, and are important in the design of nonlinear combining functions. This paper proves some properties of Plateaue...
Plateaued functions include Bent functions and partially bent functions, but are wider than them. They have good cryptographic properties, and are important in the design of nonlinear combining functions. This paper proves some properties of Plateaue...
2008, 30(3): 665-667.
doi: 10.3724/SP.J.1146.2006.01269
Abstract:
Decimation attack is one attack method of stream ciphers. In this paper, the decimation attack to prime Linear Feedback Shift Register(LFSR) sequences is investigated. The connection of decimation distance and the linear complexity of the original se...
Decimation attack is one attack method of stream ciphers. In this paper, the decimation attack to prime Linear Feedback Shift Register(LFSR) sequences is investigated. The connection of decimation distance and the linear complexity of the original se...
2008, 30(3): 668-671.
doi: 10.3724/SP.J.1146.2006.01661
Abstract:
In a designated verifier proxy signature scheme, the original signer delegates his signing capability to the proxy signer in such a way that the latter can sign messages on behalf of the former, but only designated verifier can believe the validity o...
In a designated verifier proxy signature scheme, the original signer delegates his signing capability to the proxy signer in such a way that the latter can sign messages on behalf of the former, but only designated verifier can believe the validity o...
2008, 30(3): 672-675.
doi: 10.3724/SP.J.1146.2006.01396
Abstract:
Proxy signcryption schemes allow an original signcrypter to delegate his signcryption rights to a proxy signcrypter. However, the existing proxy signcryption schemes have the defect that can not solve the proxy revocation problem, that is, how to rev...
Proxy signcryption schemes allow an original signcrypter to delegate his signcryption rights to a proxy signcrypter. However, the existing proxy signcryption schemes have the defect that can not solve the proxy revocation problem, that is, how to rev...
2008, 30(3): 676-680.
doi: 10.3724/SP.J.1146.2006.01357
Abstract:
A Q-learning based Joint Radio Resource Management (JRRM) algorithm is proposed for the autonomic resource optimization in a B3G system with heterogeneous Radio Access Technologies (RAT). Through the trial-and-error interactions with the radio enviro...
A Q-learning based Joint Radio Resource Management (JRRM) algorithm is proposed for the autonomic resource optimization in a B3G system with heterogeneous Radio Access Technologies (RAT). Through the trial-and-error interactions with the radio enviro...
2008, 30(3): 681-684.
doi: 10.3724/SP.J.1146.2006.01068
Abstract:
Fairness is an important issue when accessing a shared wireless channel. This paper presents a new fair queuing methodPFQ, after studied some fairness solutions presented recently to IEEE WLAN. And then presents a new IEEE 802.11e MAC layer protocolP...
Fairness is an important issue when accessing a shared wireless channel. This paper presents a new fair queuing methodPFQ, after studied some fairness solutions presented recently to IEEE WLAN. And then presents a new IEEE 802.11e MAC layer protocolP...
2008, 30(3): 685-689.
doi: 10.3724/SP.J.1146.2006.01168
Abstract:
In the Universal Mobile Telecommunication System (UMTS) core network, an optional element Gateway Location Register (GLR) is introduced in visited networks to reduce location management signaling cost. In traditional GLR scheme, the GLR is usually ce...
In the Universal Mobile Telecommunication System (UMTS) core network, an optional element Gateway Location Register (GLR) is introduced in visited networks to reduce location management signaling cost. In traditional GLR scheme, the GLR is usually ce...
2008, 30(3): 690-694.
doi: 10.3724/SP.J.1146.2006.01246
Abstract:
The dependence is formed between different function entities due to service request. The concept named adjacent resources is proposed according to the dependence and the NGNs flatter architecture than the traditional telecommunication network. A dist...
The dependence is formed between different function entities due to service request. The concept named adjacent resources is proposed according to the dependence and the NGNs flatter architecture than the traditional telecommunication network. A dist...
2008, 30(3): 695-698.
doi: 10.3724/SP.J.1146.2007.00065
Abstract:
Nodes in Cognitive radio networks can change their communication frequency actively, which affects networks topology and routing. In this paper, a joint routing and spectrum assignment scheme for cognitive radio networks is proposed that assigns spec...
Nodes in Cognitive radio networks can change their communication frequency actively, which affects networks topology and routing. In this paper, a joint routing and spectrum assignment scheme for cognitive radio networks is proposed that assigns spec...
2008, 30(3): 699-702.
doi: 10.3724/SP.J.1146.2007.00120
Abstract:
Clustering algorithm is a kind of key technique used to reduce energy consumption, which can increase network scalability and lifetime. Considering spatial data correlation of sensor nodes, a novel Event Driven Clustering Algorithm (EDCA) based on sp...
Clustering algorithm is a kind of key technique used to reduce energy consumption, which can increase network scalability and lifetime. Considering spatial data correlation of sensor nodes, a novel Event Driven Clustering Algorithm (EDCA) based on sp...
2008, 30(3): 703-706.
doi: 10.3724/SP.J.1146.2006.01441
Abstract:
An approach for QoS prediction of Web service composition with transaction mechanism is proposed. With the analysis on the exception handler policy of the transaction and the effect on the execution processes of composite services, the specification ...
An approach for QoS prediction of Web service composition with transaction mechanism is proposed. With the analysis on the exception handler policy of the transaction and the effect on the execution processes of composite services, the specification ...
2008, 30(3): 707-711.
doi: 10.3724/SP.J.1146.2006.01324
Abstract:
The coverage problem has been expanded with presenting the reverse problem which has not yet been thoroughly studied, i.e., given an intrusion detecting WSN, how to design an object locomotion track with high security and fast speed. Based on this go...
The coverage problem has been expanded with presenting the reverse problem which has not yet been thoroughly studied, i.e., given an intrusion detecting WSN, how to design an object locomotion track with high security and fast speed. Based on this go...
2008, 30(3): 712-716.
doi: 10.3724/SP.J.1146.2006.01316
Abstract:
Designing optimal monitoring infrastructure is a key step for network monitoring. In this paper the problem of optimizing a hierarchical monitoring system is to reduce the cost of deployment of the monitoring infrastructure by identifying a minimum a...
Designing optimal monitoring infrastructure is a key step for network monitoring. In this paper the problem of optimizing a hierarchical monitoring system is to reduce the cost of deployment of the monitoring infrastructure by identifying a minimum a...
2008, 30(3): 717-720.
doi: 10.3724/SP.J.1146.2006.01200
Abstract:
A locally regressive algorithm for color calibration is proposed. Starting from the principle of structural risk minimization, the algorithm regards the residual of total least squares as the empirical risk and chooses the K-nearest neighborhood of a...
A locally regressive algorithm for color calibration is proposed. Starting from the principle of structural risk minimization, the algorithm regards the residual of total least squares as the empirical risk and chooses the K-nearest neighborhood of a...
2008, 30(3): 721-724.
doi: 10.3724/SP.J.1146.2006.01328
Abstract:
In this paper, a gender and age classification method, in which age is classified into four classes: child, youth, midlife and agedness, based on shape free texture and boosting learning is introduced. After a face is detected, face alignment extract...
In this paper, a gender and age classification method, in which age is classified into four classes: child, youth, midlife and agedness, based on shape free texture and boosting learning is introduced. After a face is detected, face alignment extract...
2008, 30(3): 725-729.
doi: 10.3724/SP.J.1146.2006.01382
Abstract:
In practical applications of information retrieval, such as the search engine，the query user submitted contains only several keywords usually. This will cause unmatched issue of word of relevant files and users query and have more serious negative ef...
In practical applications of information retrieval, such as the search engine，the query user submitted contains only several keywords usually. This will cause unmatched issue of word of relevant files and users query and have more serious negative ef...
2008, 30(3): 730-733.
doi: 10.3724/SP.J.1146.2006.01271
Abstract:
Wire antennas mounted on complex platform combined with conducting and dielectric objects are analyzed in this paper. EFIE-PMCHW boundary coupled integral equations are constructed by using equivalence principle. The surface, wire and junction basis ...
Wire antennas mounted on complex platform combined with conducting and dielectric objects are analyzed in this paper. EFIE-PMCHW boundary coupled integral equations are constructed by using equivalence principle. The surface, wire and junction basis ...
2008, 30(3): 734-737.
doi: 10.3724/SP.J.1146.2007.00394
Abstract:
The integration paths and the expansion functions in two-level DCIM are investigated. Accurate expansion functions are proposed and a novel integration path, which can be used to calculate the spatial Greens functions of microstrip structure, is pres...
The integration paths and the expansion functions in two-level DCIM are investigated. Accurate expansion functions are proposed and a novel integration path, which can be used to calculate the spatial Greens functions of microstrip structure, is pres...
2008, 30(3): 738-741.
doi: 10.3724/SP.J.1146.2006.01910
Abstract:
A novel pattern synthesis algorithm based on optimization theory is presented in the paper. The algorithm initializes with the set of weights which is used to maintain the desired mainlobe with phase-independent derivative constraints, then the resid...
A novel pattern synthesis algorithm based on optimization theory is presented in the paper. The algorithm initializes with the set of weights which is used to maintain the desired mainlobe with phase-independent derivative constraints, then the resid...
2008, 30(3): 742-745.
doi: 10.3724/SP.J.1146.2006.01292
Abstract:
In order to eliminate the late-time-oscillate in time domain integral equation, EFIE, MFIE and CFIE which based on the method of MOD using Laguerre polynomials as temporal basis function were introduced, induced current distributing and backward scat...
In order to eliminate the late-time-oscillate in time domain integral equation, EFIE, MFIE and CFIE which based on the method of MOD using Laguerre polynomials as temporal basis function were introduced, induced current distributing and backward scat...
2008, 30(3): 752-755.
doi: 10.3724/SP.J.1146.2006.01255
Abstract:
This paper models the process of video compression, DCT quantization noise and motion estimation noise with exploiting the quantization step size and motion information embedded in the bit-stream. Together with the additive noise term of imaging, the...
This paper models the process of video compression, DCT quantization noise and motion estimation noise with exploiting the quantization step size and motion information embedded in the bit-stream. Together with the additive noise term of imaging, the...
2008, 30(3): 756-758.
doi: 10.3724/SP.J.1146.2006.01351
Abstract:
A new antenna array consisting of U-slot microstrip patches is introduced. The array is fed by a novel wideband matching network and the energy is coupled to the U-slot patches through the feed slot on the ground. The operating frequency range of ant...
A new antenna array consisting of U-slot microstrip patches is introduced. The array is fed by a novel wideband matching network and the energy is coupled to the U-slot patches through the feed slot on the ground. The operating frequency range of ant...
2008, 30(3): 759-762.
doi: 10.3724/SP.J.1146.2006.01211
Abstract:
It is difficult to estimate channel knowledge in multiple input multiple output system which based on distributed antenna structure because the transmit signals are received asynchronously. Aiming at this matter, a differential encoding and detection...
It is difficult to estimate channel knowledge in multiple input multiple output system which based on distributed antenna structure because the transmit signals are received asynchronously. Aiming at this matter, a differential encoding and detection...
2008, 30(3): 746-751.
doi: 10.3724/SP.J.1146.2006.01680
Abstract:
In order to have a thorough understanding of the technical architecture of OMA DRM specification, and to actively promote creation of the Chinese DRM standard and application research of digital content protection technology, a systematic approach of...
In order to have a thorough understanding of the technical architecture of OMA DRM specification, and to actively promote creation of the Chinese DRM standard and application research of digital content protection technology, a systematic approach of...
