The circular spots appear as round local peaks/valleys in image space, and they reflect omnidirectional symmetry and Gaussian distribution characteristics. According to these observations, a novel rotating line scan o...
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Independent Component Analysis (ICA) was often used to separate movement related independent components (MRICs) from Electroencephalogram (EEG) data.?However, to obtain robust spatial filters, complex characteristic f...
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Independent Component Analysis (ICA) was often used to separate movement related independent components (MRICs) from Electroencephalogram (EEG) data.?However, to obtain robust spatial filters, complex characteristic features, which were manually selected in most cases, have been commonly used. This study proposed a new simple algorithm to extract MRICs automatically, which just utilized the spatial distribution pattern of ICs. The main goal of this study was to show the relationship between spatial filters performance and designing samples. The EEG data which contain?mixed brain states (preparing, motor imagery and rest) were used to design spatial filters. Meanwhile, the single class data was also used to calculate spatial filters to assess whether the MRICs extracted on different class motor imagery spatial filters are similar. Furthermore, the spatial filters constructed on one subject’s EEG data were applied to extract the others’ MRICs. Finally, the different spatial filters were then applied to single-trial EEG to extract MRICs, and Support Vector Machine (SVM) classifiers were used to discriminate left hand、right-hand and foot imagery movements of BCI Competition IV Dataset 2a, which recorded four motor imagery data of nine subjects. The results suggested that any segment of finite motor imagery EEG samples could be used to design ICA spatial filters, and the extracted MRICs are consistent if the position of electrodes are the same, which confirmed the robustness and practicality of ICA used in the motor imagery Brain Computer Interfaces (MI-BCI) systems.
A novel multi-layer third-order substrate integrated waveguide (SIW) bandpass filter with improved lower stopband performance is proposed. TE201-mode in folded-SIW cavity is utilized to implement negative cross coupli...
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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 ...
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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.
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.
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