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International Symposium on Antennas Propagation and EM Theory

作者： Lingyang Kong Yufa Sun Tao Sheng Key Lab. of Intelligent Computing & Signal Processing Ministry of Education Anhui University

ISBN: (纸本)9781467317993

The TD-SCDMA relay (repeater) provide network operators with a cost-effective means of extending coverage to areas of low signal strength. The maximum gain of a TD-SCDMA repeater is, however, limited by the amount of isolation that exists between the donor and coverage antennas. The radio echoes from coverage antennas not only create interference in the incoming signal from the base station, but also cause instability of the repeater. In this paper, we present an interference cancellation system (ICS) for TD-SCDMA networks, which can eliminate these problems. Various characteristic features of the ICS are illustrated using the MATLAB simulation results.

关键词： TD-SCDMA Relay Repeater ICS

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Perfect plane-wave source for a high-order symplectic finite-difference time-domain scheme

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Chinese Physics B 2011年第11期20卷 365-370页

作者：王辉黄志祥吴先良任信钢 Key Laboratory of Intelligent Computing & Signal Processing of Ministry of Education Anhui University Department of Physics and Electronic Engineering Hefei Normal University

The method of splitting a plane-wave finite-difference time-domain （SP-FDTD） algorithm is presented for the initiation of plane-wave source in the total-field / scattered-field （TF/SF） formulation of high-order symplectic finite- difference time-domain （SFDTD） scheme for the first time. By splitting the fields on one-dimensional grid and using the nature of numerical plane-wave in finite-difference time-domain （FDTD）, the identical dispersion relation can be obtained and proved between the one-dimensional and three-dimensional grids. An efficient plane-wave source is simulated on one-dimensional grid and a perfect match can be achieved for a plane-wave propagating at any angle forming an integer grid cell ratio. Numerical simulations show that the method is valid for SFDTD and the residual field in SF region is shrinked down to -300 dB.

关键词： splitting plane-wave finite-difference time-domain high-order symplectic finite-differencetime-domain scheme plane-wave source

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Generalized two-dimensional FLD with assembled matrix distance metric for face recognition

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Journal of Information and Computational Science 2012年第12期9卷 3439-3446页

作者： Shi, Yuexiang Gong, Ping Tao, Zhiping Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education School of Information Engineering Xiangtan University Xiangtan 411105 China School of Information Engineering Xiangtan University Xiangtan 411105 China

Two-dimensional fisher linear discriminant analysis (2DFLD or 2DLDA) has attracted much attention from researchers recently for the advantages over the singularity problem and the computational cost. Recent research on 2DLDA-based methods has mainly concentrated on two issues, namely: 1) feature extraction and 2) classification. In this paper, we further analyze these two problems simultaneously by using G-2DFLD supplemented with an Assembled Matrix Distance (AMD) metric. For feature extraction, G-2DFLD is proposed, which can be used for image feature extraction by reducing the dimensionality in both horizontal and vertical directions. For classification, an AMD metric is presented to calculate the distance between two feature matrices, then, the nearest neighbor classifier is used for face recognition. To test this new method, ORL face database is used and the results show the efficiency of G-2DFLD with AMD metric in face recognition. © 2012 Binary Information Press.

关键词： Feature extraction

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A novel segmentation method for convex lesions based on dynamic programming with local intra-class variance 12

A novel segmentation method for convex lesions based on dyna...

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27th Annual ACM Symposium on Applied computing, SAC 2012

作者： Yu, Mali Huang, Qiliang Jin, Renchao Song, Enmin Liu, Hong Hung, Chih-Cheng School of Computer Science Huazhong University of Science and Technology Wuhan China Key Laboratory of Education Ministry for Image Processing and Intelligent Control Wuhan Hubei China Radiology Department Second People's Hospital of Nanning Nanning China School of Computing and Software Engineering Southern Polytechnic State University GA United States

ISBN: (纸本)9781450308571

Lesion segmentation plays an important role in medical image processing and analysis. There exist several successful dynamic programming (DP) based segmentation methods for general images. In those methods, the gradient is used as an important factor in the cost function to attract the contours to the boundaries. Since medical images have their characteristics such as low contrast, blurred edges and high noises, the gradient operator cannot work well enough to achieve a satisfactory performance for boundary detection. We define the local intra-class variance and combine it with the dynamic programming method to replace the traditional gradient operation. Experiments on synthetic and X-ray images are carried out and the results are compared with Canny and fast multilevel fuzzy edge detection (FMFED) algorithms. It is demonstrated that the proposed method performs better on medical images with low contrast, blurred edges and high noises. In addition, 483 regions of interest of mammograms randomly extracted from DDSM of the University of South Florida are used to compare our proposed method with the plane-fitting and dynamic programming method (PFDP), and the normalized cut segmentation method (Ncut). The results demonstrate that our method is more accurate and robust than PFDP and Ncut. © 2012 ACM.

关键词： Dynamic programming

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An efficient implementation of double precision 1-D FFT for GPUs Using CUDA

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Journal of Information and Computational Science 2012年第2期9卷 387-394页

作者： Liu, Yanjun Guo, Licai Luo, Bin Zhang, Xingyi School of Computer Science and Technology Anhui University Hefei 230039 China Key Lab of Intelligent Computing and Signal Processing of Ministry of Education Anhui University Hefei 230039 China School of Computer Science and Technology University of Science and Technology of China Hefei 230027 China

Fast Fourier Transform (FFT) is a well known and widely used tool in many scientific and engineering fields. CUFFT, which is the NVIDIA's FFT library included in the CUDA toolkit, supports double precision FFTs. However, the implementation of CUFFT is not very efficient. In this paper, we implement an efficient double-precision Cooley-tukey algorithm for GPUs using CUDA. Some programming techniques are employed to exploit the hardware characteristics. These techniques include on-chip shared memory utilization, removing redundant computation, and coalescing the global memory access. Experiments show that the performance of our 1-D FFT is as fast as CUFFT. Furthermore, the performance of our FFT implementation is more than twice faster than CUFFT for small input sizes. Copyright © 2012 Binary Information Press.

关键词： Graphics processing unit

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Convergence analysis of particle swarm optimization algorithm

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Advances in Information Sciences and Service Sciences 2012年第14期4卷 25-32页

作者： Gao, Shang Cao, Cungen School of Computer Science and Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China Key Laboratory of Intelligent Computing Information Processing of Ministry of Education Xiangtan University Xiantan 411105 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

Using Particle Swarm Optimization to handle complex functions with high-dimension it has the problems of low convergence speed and sensitivity to local convergence. The convergence of particle swarm algorithm is studied from the dynamic system theory, and the condition for the convergence of particle swarm algorithm is given. The analysis provided qualitative guidelines for the general algorithm parameter selection. Results of numerical tests show the efficiency of the results.

关键词： Parameter estimation

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Sliding mode and LMI based control for fractional order unified chaotic systems

Sliding mode and LMI based control for fractional order unif...

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Chinese Control Conference (CCC)

作者： Yong-Hong Lan Lv-Jun He School of Information Engineering Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education Xiangtan University Xiangtan Hunan China School of Information Engineering Xiangtan University Xiangtan Hunan China

ISBN: (纸本)9781467325813

This paper investigates the chaos control problem for a class of fractional order unified chaotic systems. By introducing the sliding mode control method, a feedback controller is established to guarantee the asymptotical stability, and its parameter is obtained in terms of LMI, which can be easily obtained by Matlab's LMI Toolbox. A dynamic compensator is designed to overcome the difficulty of dealing with the nonlinear items in the chaotic system. To reduce the chattering phenomenon, a power reaching law is adopted. The validity of the methods is verified by a numerical example.

关键词： Chaos Sliding mode control Time factors MATLAB Synchronization Adaptive control

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The study on power quality evaluation based on data analysis

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International Journal of Advancements in computing Technology 2012年第19期4卷 586-592页

作者： Zhang, Li Jiang, Yongcheng Liu, Ning Zhang, Bao-Hua Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei 230601 China School of Electric Engineering and Automation Anhui University Hefei 230601 China Library of Hefei Normal University Hefei 230601 China School of Electronics and Information Engineering Anhui University Hefei 230601 China

Power quality is the guide to the power of equipment malfunction or cannot work normally voltage. Rapid use, to the electric power quality caused serious, destruction and pollution power quality, produce the voltage wave and so on many kinds of power quality problems, to the user and power supply party bring huge economic loss "at the same time to plan. Microprocessor as the core of the intelligent precision equipment to the electric power quality put forward higher requirement, how to effectively can quality problem, improve the quality of power become the electric power industry research hotspot and focus of power quality inspection Richard and improve the quality of power, the prerequisite and basis of only fast. The correct detection and recognition of the electrical energy to take the right management measures improve the quality of power;reduce the loss of power quality problems.

关键词： Power quality

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Tissue P systems with cell separation: attacking the partition problem

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Science China(Information Sciences) 2011年第2期54卷 293-304页

作者： ZHANG XingYi1, WANG Shuo2, NIU YunYun2 & PAN LinQiang2 1key Lab of intelligent computing and signal processing of ministry of education, School of Computer Science and Technology, Anhui University, Hefei 230039, China 2Image processing and intelligent Control key Laboratory of education ministry of China, Department of Control Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China Key Lab of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University Hefei China Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

Tissue P systems are distributed parallel and non-deterministic computing models in the framework of membrane computing, which are inspired by intercellular communication and cooperation between neurons. Recently, cell separation is introduced into tissue P systems, which enables systems to generate an exponential workspace in a polynomial time. In this work, the computational power of tissue P systems with cell separation is investigated. Specifically, a uniform family of tissue P systems with cell separation is constructed for effciently solving a well-known NP-complete problem, the partition problem.

关键词： membrane computing tissue P system cell separation partition problem

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Optimum relay location in cooperative communication networks with single DF relay

Optimum relay location in cooperative communication networks...

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IEEE International Conference on Computer Science and Automation Engineering

作者： Xu, Lei Zhang, Hong-Wei Li, Xiao-Hui Wu, Xian-Liang Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China

ISBN: (纸本)9781424487257

In wireless communication, the cooperative communications technology has been concern because of its advantages of spatial diversity. In particular, cooperative communication with a single relay is a simple, practical technology for wireless sensor networks. In this paper, we analyze several simple network topologies. Under the condition of equal power allocating, the optimum relay locations are respectively determined by using symbol error rate (SER) formula. And these types of topologies are compared, the analysis results show that, Linear network topology has the best system performance, the system performance of isosceles triangle topology is better than that of equilateral triangle topology. © 2011 IEEE.

关键词： Cooperative communication

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