The method of SP-FDTD (Splitting Plane wave Finite Difference Time Domain)is applied to 3D FDTD (Finite Difference Time Domain)method for plane wave incidence. Based on the split-field formulation, the method has the ...
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The method of SP-FDTD (Splitting Plane wave Finite Difference Time Domain)is applied to 3D FDTD (Finite Difference Time Domain)method for plane wave incidence. Based on the split-field formulation, the method has the new iterative equations and can eliminate the error of interpolation and discretized phase velocity mismatch between 1D FDTD and 3D FDTD grid. Numerical results show that the present method is valid for different type of wave sources, and accuracy for oblique incident plane wave, with the leakage error on the order of -300 dB.
At present, the software's type forms present diversity, and how to automatically analyze the software's risk behaviors become an urgent problem. This paper used some software behavior crawlers and dynamic ana...
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We proposed two whispered speech enhancement methods based on asymmetric cost functions in this paper to deal with the amplification and attenuation distortions of whispered speech *** modified Itakura-Saito（MIS）dis...
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We proposed two whispered speech enhancement methods based on asymmetric cost functions in this paper to deal with the amplification and attenuation distortions of whispered speech *** modified Itakura-Saito（MIS）distance function provides more penalties to speech amplification distortion,whereas the Kullback-Leibler（KL）divergence function gives more penalties to speech attenuation *** experimental results show that the MIS function based method achieves significant improvement of intelligibility in contrast to the conventional speech enhancement algorithms when the signal-to-noise ratio（SNR）falls below-6 dB,whereas the KL function based one achieves the similar result as the minimum mean square error（MMSE）speech enhancement *** results show that the effects of the amplification and attenuation distortions on the intelligibility of the enhanced whisper are different,where larger attenuation distortion may result in better intelligibility of speech with low ***,the attenuation distortion has small effects on intelligibility of speech with high SNR.
A full-rate distributed transmission scheme for two-way multi-antenna wireless cooperative relay networks is proposed in this paper, which is suitable for the universal bidirectional relay communication model that two...
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A full-rate distributed transmission scheme for two-way multi-antenna wireless cooperative relay networks is proposed in this paper, which is suitable for the universal bidirectional relay communication model that two source terminals and all relays are equipped with multiple antennas. Orthogonal frequency division multiplexing (OFDM) ways are adopted to complete all information transmissions among different nodes. One whole bidirectional data exchange and transmission process between both source terminals mainly includes two stages. In the first stage, the symbols to be transmitted are jointly coded appropriately at two source terminals during several time slots on each sub-carrier, and then broadcasted to all relay nodes respectively. In the second stage, each OFDM modulation symbol is cyclically delayed with proper cyclic delay value at each relay in time domain. In the amplification and forwarding (AF) process, the operated signals at all relays are transmitted to both source terminals successively in time division (TD) ways, only those antennas performing cooperative relay transmissions at each relay node work together during several proper AF time slots. According to the coding and forwarding rules, one source terminal can obtain the original data from the other terminal after eliminating self-interferences. Finally, the proposed scheme can realize full-rate transmissions with low coding and detection complexity, which is applicable to the general bidirectional relay communication case, the coding process is simple and can be extended to design similar relay schemes easily. Simulation results verify the superiority and effectiveness of the proposed scheme.
Deep learning has recently shown outstanding performance on feature extraction. In this paper, we go one step further and address the problem of object tracking using a combination of Convolutional Neural Networks and...
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In this paper, a linearly implicit conservative difference scheme for the coupled nonlinear Schrödinger equations with space fractional derivative is proposed. This scheme conserves the mass and energy in the dis...
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CoMP has been adopted in 3GPP LTE-Advanced to improve the coverage of high data *** the downlink transmission mode,JP or CB,should be selected for base station cooperation when the backhaul capacity is *** this paper,...
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CoMP has been adopted in 3GPP LTE-Advanced to improve the coverage of high data *** the downlink transmission mode,JP or CB,should be selected for base station cooperation when the backhaul capacity is *** this paper,considering different numbers of users,we propose an adaptive transmission mode *** mitigate the performance degradation caused by mismatching between numbers of transmitting antennas and MSs,we develop a strategy with proportional fairness that takes into account backhaul constraints and users *** simulation results show that the proposed algorithm provide considerable performance gains in the sum rates per cell and the cell-edge user throughput under constrainedcapacity backhaul links.
In this paper,a novel design of the dual passband lowpass filter based on the Defect Ground Structure(DGS) is *** defect ground structure(DGS) is achieved by opening a set of asymmetric U-shaped slot in the ground pla...
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In this paper,a novel design of the dual passband lowpass filter based on the Defect Ground Structure(DGS) is *** defect ground structure(DGS) is achieved by opening a set of asymmetric U-shaped slot in the ground plane and the microstrip line using a U-strip *** proposed structure is simulated by the high frequency simulation software HFSS *** comparison with the filter without U-shaped DGS,the proposed filter has low insertion loss and its frequency ranges from 8.4GHz to 12.7GHz,signal restrains from 2.7dB to 14 *** simulated and measured results show good agreement and validate the proposed approach.
Complex networks have attracted much attention in diverse areas of science and technology. Multifractal analysis (MFA) is a useful way to systematically describe the spatial heterogeneity of both theoretical and exper...
Embedded systems and computational intelligence have been greatly developed in recent *** is necessary to consider the design of a handheld terminal for industrial control purposes because there is still some work don...
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Embedded systems and computational intelligence have been greatly developed in recent *** is necessary to consider the design of a handheld terminal for industrial control purposes because there is still some work done by hand in the industrial process, and it is inconvenient and inefficient. In this paper, a design and achievement of a handheld terminal used in the industrial inspection process is proposed in order to make industrial control more efficient and safer. The handheld terminal hardware consists of ARM11 S3C6410 and RFID module together with a wireless transmission module. As for the software program, we use a QT platform in Fedora to design software programs including serial communication, RFID, and wireless transmission. We also design a useful Chinese input method. Finally, the test shows that the handheld terminal can work well in an industrial process and does have great application prospects.
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