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Congestion control strategy based on probability selection in delay tolerant mobile sensor network

Journal of Information and Computational Science 2014年第14期11卷 5121-5130页

作者： Wang, Bingting Hu, Yanjun Liang, Hui Lin, Qibin Shi, Yonghua Wang, Xianbing School of Electronic and Electrical Engineering Chuzhou University Chuzhou China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China School of Information Science & Technology Southwest Jiaotong University Chengdu China

We analyzed the relationship between packet validity and encounter probability as well as the relationship between packet validity and remaining lifetime. Then we proposed the congestion control strategy based on probability selection, which implements the operations of congestion detection and congestion avoidance. When node buffer is fully occupied and needs to store a new packet, it will look for the packets whose remaining lifetime is lower than the threshold T, and then drop the packet with minimum encounter probability. If there is no packet whose remaining lifetime is lower than T, the packet with the shortest remaining lifetime will be dropped. Simulation results show that this congestion control strategy improves the performances of delivery probability, average delay and overhead ratio compared with four kinds of congestion control strategies. 1548-7741/Copyright © 2014 Binary Information Press

关键词： Probability

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Robust Spatial Filters on Three-Class Motor Imagery EEG Data Using Independent Component Analysis

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Journal of Biosciences and Medicines 2014年第2期2卷 43-49页

作者： Bangyan Zhou Xiaopei Wu Lei Zhang Zhao Lv Xiaojing Guo The Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China

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.

关键词： ICA Spatial Filter Motor Imagery BCI SVM

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Efficient plane wave injection for 3D FDTD method

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Tien Tzu Hsueh Pao/Acta Electronica Sinica 2014年第6期42卷 1086-1089页

作者： Wu, Bo Wang, Hui Huang, Zhi-Xiang Wu, Xian-Liang Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University HefeiAnhui230039 China

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.

关键词： Finite difference time domain method

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Adaptive Co MP Downlink Transmission Mode Selection in Backhaul-Constrained Cellular Systems

Adaptive Co MP Downlink Transmission Mode Selection in Backh...

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The 7th IEEE/International Conference on Advanced Infocomm Technology

作者： Yi Wang Yanjun Hu Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University

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.

关键词： Co MP,backhaul,LTE,proportional fairness

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A novel dual passband lowpass filter based on U-shaped DGS

A novel dual passband lowpass filter based on U-shaped DGS

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International Conference on Multimedia, Communication and computing Application（MCCA 2014）

作者： H.Q.He M.Q.Li Y.Ding H.X.Chang F.L.Zhao Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University

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.

关键词： Dual passband Lowpass filter U-shaped DGS

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Adaptive comp downlink transmission mode selection in backhaul-constrained cellular systems

Adaptive comp downlink transmission mode selection in backha...

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International Conference on Advanced Infocomm Technology (ICAIT)

作者： Yi Wang Yanjun Hu Key Laboratory of Intelligent Computing & Signal Processing Anhui University Hefei China

ISBN: (纸本)9781479954568

CoMP has been adopted in 3GPP LTE-Advanced to improve the coverage of high data rates. And the downlink transmission mode, JP or CB, should be selected for base station cooperation when the backhaul capacity is limited. In this paper, considering different numbers of users, we propose an adaptive transmission mode selection. To 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 selection. The simulation results show that the proposed algorithm provide considerable performance gains in the sum rates per cell and the cell-edge user throughput under constrained-capacity backhaul links.

关键词： Computer architecture Interference Microprocessors Downlink Transmitting antennas Joints Performance gain

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A DCT-SVD Domain Watermarking for Color Digital Image Based on Compressed Sensing Theory and Chaos Theory

A DCT-SVD Domain Watermarking for Color Digital Image Based ...

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International Symposium on Computational Intelligence and Design, ISCID

作者： Mengmen Li Chao Han Key laboratory of intelligent computing & signal processing Anhui university Hefei China

ISBN: (纸本)9781479970063

In this paper, it is presented that a new color image watermarking algorithm based on compressed sensing theory and chaos theory in discrete cosine transform (DCT) and singular value decomposition (SVD) domain. Initially, a color watermarking image is preprocessed by four steps i.e. Being divided into red, green and blue channels, being sparse by wavelet transform, scrambling by 1-D chaos sequence and measurement through Gaussian random matrix. Here, the chaos sequence is produced by 1-D Logistic mapping. Then the red, green and blue channel images of a color host image are divided into 8×8 blocks and then transformed by DCT. Next the first DCT coefficient of each block is selected to compose a new matrix, and the new matrix is decomposed by SVD. The singular values are the regions of watermarking embedment. Thirdly, three sets of measured coefficients as new watermarking are embedded into the corresponding singular values. Finally, the Iterative Hard Threshold (IHT) algorithm is used to reconstruct the watermarking image. The method proposed can not only enlarge the information capacity of watermarking embedment but also strengthen the security of watermarking in the condition of the good imperceptibility. The experiments show that the scheme is feasible and has good anti-attack ability for JPEG compression, Gaussian white noise, rotating and median filtering.

关键词： Watermarking Chaos Discrete cosine transforms Matrix decomposition signal processing algorithms Robustness Compressed sensing

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The design and realization of a handheld terminal for industrial control purposes,based on RFID and embedded Linux

The design and realization of a handheld terminal for indust...

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2014 International Conference on Future Communication Technology and Engineering (FCTE 2014)

作者： T.Zhang Y.H.Xu Z.Q.Ye Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University

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.

关键词： The design and realization of a handheld terminal for industrial control purposes,based on RFID and embedded Linux

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A Universal Sparse signal Reconstruction Algorithm via Backtracking and Belief Propagation

A Universal Sparse Signal Reconstruction Algorithm via Backt...

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International Symposium on Computational Intelligence and Design, ISCID

作者： Fang Jiang Yanjun Hu Caiqing She Key Laboratory of Intelligent Computing & Signal Processing Anhui University Hefei China

ISBN: (纸本)9781479970063

The belief propagation (BP) algorithm under the Bayesian framework can accelerate Compressed Sensing (CS) encoding and decoding by using the sparse encoder matrix. To improve the reconstruction performance we consider a backtracking-based belief propagation algorithm (CS-BBP) for the sparse signal reconstruction. The backtracking is added after performing BP and minimum mean square error (MMSE) estimate in every iteration. Simulation results show that the CS-BBP is a universal reconstruction algorithm which has a good performance for both 1-D Gaussian and 2-D image signal reconstructions.

关键词： Bayes methods Image reconstruction signal to noise ratio Belief propagation signal processing algorithms Compressed sensing signal reconstruction

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Research on the transmission enhancement properties of a novel subwavelength grating structure and mechanism

Research on the transmission enhancement properties of a nov...

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2014 AASRI International Conference on Applied Engineering Sciences（ICAES2014）

作者： H.X.Chang M.Q.Li S.Zhang Y.Ding Key Laboratory of Intelligent Computing & Signal Processing Ministry of EducationAnhui University

The subwavelength metal grating is designed and simulated by using the finite difference time domain(FDTD) *** transmission characteristics of subwavelength metal grating structure are studied based on the Lossy Drude dispersive medium *** influence of grating geometry parameters on the transmission characteristics are analyzed,especially for the zero transmission point location of the *** difference between the designed and conventional gratings is that the former introduces the resonant *** show that,compared with the single-layer grating,the triple-layer grating has a better filtering effect,and the transmission spectrum peak is in excess of 82%.It concludes that the transmission peak drift is analyzed by using the waveguide Fabry-Perot(F-P) cavity resonance effect,and the zero transmission point location of the spectrum is independent of the metal layer *** influence rules provide an available reference for the design of the band-pass filters.

关键词： domain THz Research on the transmission enhancement properties of a novel subwavelength grating structure and mechanism

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