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检索条件"任意字段=8th International Conference on Algorithms and Architectures for Parallel Processing"

共 2884 条记录，以下是2101-2110 订阅

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A Wavelet-based parallel Implementation for Image Encoding

A Wavelet-based Parallel Implementation for Image Encoding

引用

2006 8th international conference on Signal processing

作者： Chang Qi Gaofeng Wang Institute of Micro-electronics & Information Technology

A wavelet-based parallel implementation is presented for image encoding on a multi-DSP system. the implementation is utilizing the discrete wavelet transform(DWT) and is realized in parallel processor *** implementation has a very flexible architecture,which allows addition of extra slave processors(SPs) to the system whenever more computational power is *** of the implementation is measured and compared to a sequential reference *** results show that the parallel implementation is very efficient and overpowers the sequential counterpart considerably.

关键词： image A Wavelet-based parallel Implementation for Image Encoding EZW DWT Wavelet

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Parameters estimation of coherently distributed sources in the presence of mutual coupling

Parameters estimation of coherently distributed sources in t...

引用

international conference on Signal processing Proceedings (ICSP)

作者： Xiansheng Guo Qun Wan Wanlin Yang Department of Electronic Engineering University of Electronic Science and Technology Chengdu China

In this paper, we consider the problem of parameters estimation of coherently distributed (CD) sources using doublet parallel uniform linear array (ULA) in the presence of mutual coupling. Unlike the mutual coupling matrix of ULA, the mutual coupling matrix of doublet parallel uniform linear array (ULA) is only symmetric but not Toeplitz. Aiming at this point, a decoupling parameters estimation method is proposed. In the proposed algorithm, only one auxiliary source is needed to calibrate mutual coupling effects. After calibrating the mutual coupling, we can estimate the central DOA of CD sources using TLS-ESPRIT accurately. Once DOA is estimated, the angular spread can be obtained by one-dimensional spectrum searching instead of two-dimensional spectrum searching. Simulation results demonstrate the validity of the proposed method

关键词： Parameter estimation Mutual coupling Signal processing algorithms Linear antenna arrays Direction of arrival estimation Maximum likelihood estimation Symmetric matrices Computational complexity Iterative algorithms Calibration

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Proceedings - Joint conference - 8th IEEE international conference on E-Commerce and Technology (CEC 2006) 3rd IEEE international conference on Enterprise Computing, E-Commerce and E-Services (EEE 2006)

Proceedings - Joint Conference - 8th IEEE International Conf...

引用

CEC/EEE 2006 Joint conferences

ISBN: (纸本)0769525113

the proceedings contain 87 papers. the topics discussed include: global innovation, creating an innovation process;exploiting platform technologies for creating real-time enterprises;complex event processing using simple rule-based event correlation engines for business performance management;modeling and measuring privacy risks in QoS web services;soft real-time aspects for service-oriented architectures;decentralized consistency checking in cross-organizational workflows;evaluating centrality measures in large call graphs;improving patient activity schedules by multi-agent Pareto appointment exchanging, DAG synchronization constraint language for business processes;concept covering for automated building blocks selection based on business processes semantics;ranking web search results from personalized perspective;moderating the price sensitivity of online customers;and a real-time yield management framework for E-services.

关键词： Electronic commerce

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A Design Methodology for Hardware Acceleration of Adaptive Filter algorithms in Image processing

A Design Methodology for Hardware Acceleration of Adaptive F...

引用

international conference on Application Specific Systems (ASAP), architectures and Processors

作者： Hritam Dutta Frank Hannig Jurgen Teich Benno Heigl Heinz Hornegger Department of Computer Science 12 University of Erlangen Nuremberg Nuremberg Germany Medical Solutions AX Siemens AG Communications Forchheim Germany

Massively parallel processor array architectures can be used as hardware accelerators for a plenty of dataflow dominant applications. Bilateral filtering is an example of a state-of-the-art algorithm in medical imaging, which falls in the class of 2D adaptive filter algorithms. In this paper, we propose a semi-automatic mapping methodology for the generation of hardware accelerators for such a generic class of adaptive filtering applications in image processing. the final architecture deliver similar synthesis results as a hand-tuned design.

关键词： Design methodology Hardware Acceleration Adaptive filters Image processing Signal processing algorithms Biomedical imaging Field programmable gate arrays Medical diagnostic imaging Application software

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parallel Testing of Phase-Locked Loop Lock Time In Production

Parallel Testing of Phase-Locked Loop Lock Time In Productio...

引用

2006 8th international conference on Signal processing

作者： Larry Zhang Low Power Wireless Test Group High Performance Analog DivisionTexas InstrumentsInc.DallasTX 75243USA

Methods to accurately measure Phase-locked loop lock time in multisite production environment has been presented and *** methods are applicable for testing transceiver frequency settling

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A Novel Hemispherical Array Sound Source Localization

A Novel Hemispherical Array Sound Source Localization

引用

international conference on Signal processing Proceedings (ICSP)

作者： Hedayat Alghassi Shahram Tafazoli Peter Lawrence Department of Electrical and Computer Engineering University of British Columbia Vancouver BC Canada

In this paper we present a novel signal processing algorithm and array for sound source localization in an enclosed area. this method, which has some similarity to the human eye structure, consists of a novel hemispherical microphone array with microphones on the shell and one microphone in the sphere center. A signal processing scheme utilizes parallel creation of a special closeness functions for each microphone direction on the shell. the closeness functions have output values that are linearly proportional to spatial angular difference between the sound source direction and each of the shell microphone directions, in close vicinity of them. Finally by choosing directions corresponding to the highest closeness function values and implementing a linear weighted spatial averaging on those directions we estimate the sound source direction. Contrary to traditional algorithmic sound source localization techniques, our method is based on some simple parallel mathematical calculations in the time domain; therefore it can be easily implemented on a custom designed integrated circuit

关键词： Microphone arrays Sensor arrays Signal processing algorithms Delay estimation Interpolation Shape measurement Speech Delay effects Acoustic propagation Mutual coupling

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A parallel and hybrid Multi-Objective Evolutionary Algorithm applied to the design of cellular networks

A parallel and hybrid Multi-Objective Evolutionary Algorithm...

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13th IEEE Mediterranean Electrotechnical conference (MELECON 2006)

作者： Cahon, S. Talbi, E-G. Melab, N. Univ Lille 1 CNRS LIFL INRIA F-59655 Villeneuve Dascq France

ISBN: (纸本)1424400872

Cellular network design is a major issue in mobile telecommunication systems. In this paper, a model of the problem in its full practical complexity, based on multiobjective constrained combinatorial optimization, has been investigated. We adopted the Pareto approach at resolution in order to compute a set of diversified non-dominated networks, thus removing the need for the designer to rank or weight objectives. We design an asynchronous Steady-State Evolutionary Algorithm for its resolution. Specific coding scheme and genetic and neighborhood operators have been designed for the tackled problem. On the other side, we make use of many generic features related to advanced intensification and diversification search techniques, hybridization of metaheuristics and grid computing for the distribution of the computations. they aim at improving the quality of networks and robustness, at speeding-up the search, hence efficiently solving large instances of the problem. Using realistic benchmarks, the computed networks and speedups on parallel/distributed architectures show the efficiency and the scalability of hierarchical models of hybridization and paralletization used in conjunction.

关键词： Evolutionary algorithms

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Multigrid and Gauss-Seidel smoothers revisited: parallelization on chip multiprocessors 06

Multigrid and Gauss-Seidel smoothers revisited: Parallelizat...

引用

20th Annual international conference on Supercomputing, ICS 2006

作者： Wallin, Dan Löf, Henrik Hagersten, Erik Holmgren, Sverker Uppsala University Department of Information Technology P.O. Box 337 SE751 05 Uppsala Sweden

ISBN: (纸本)1595932828

Efficient solution of partial differential equations require a match between the algorithm and the target architecture. Many recent chip multiprocessors, CMPs (a.k.a. multi-core), feature low intra-thread communication costs and smaller per-thread caches compared to previous shared memory multi-processor systems. From an algorithmic point of view this means that data locality issues become more important than communication overheads. A fact that may require a re-evaluation of many existing *** have investigated parallel implementations of multi-grid methods using a parallel temporally blocked, naturally ordered smoother. Compared to the standard multigrid solution based on a red-black ordering, we improve the data locality often as much as ten times, while our use of a fine-grained locking scheme keeps the parallel efficiency *** algorithm was initially inspired by CMPs and it was surprising to see that our OpenMP multigrid implementation ran up to 40 percent faster than the standard red-black algorithm on a contemporary 8-way SMP system. thanks to the temporal blocking introduced, our smoother implementation often allowed us to apply the smoother two times at the same cost as a single application of a red-black smoother. By executing our smoother on a 32-thread UltraSPARC T1 (Niagara) SMT/CMP and a simulated 32-way CMP we demonstrate that such architectures can tolerate the increased communication costs implied by the tradeoffs made in our implementation. Copyright 2006 ACM.

关键词： parallel processing systems

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A parallel Image Fusion Algorithm Based on Wavelet Packet

A Parallel Image Fusion Algorithm Based on Wavelet Packet

引用

2006 8th international conference on Signal processing

作者： Yinglei Cheng Ying Li Rongchun Zhao The Telecommunication Engineering Institute Air Force Engineering University Department of Computer Science and Engineering Northwestern Polytechnical University

the wavelet packet provides an accurate method for image ***,the computation and time cost will increase with the size of *** it is difficult to achieve real-time *** having analyzed the wavelet packet based image fusion algorithm on the single computer, according to the time complexity and the parallel character of the wavelet packet algorithm,we propose a wavelet packet based parallel image fusion algorithm under the situation of distributed *** on the data local property of wavelet packet transform,we achieve the algorithm on the MPI(Message Passing Interface) parallel computing platform,which is composed by Pentium PC and 1000 Mbps *** efficiency of parallel computing is studied under different image size and different cluster size. the experimental result shows that the algorithm has good parallel computing property.

关键词： Fusion SAR A parallel Image Fusion Algorithm Based on Wavelet Packet image Wavelet

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A Neural Networks Approach for Designing FIR Notch Filters

A Neural Networks Approach for Designing FIR Notch Filters

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international conference on Signal processing Proceedings (ICSP)

作者： Xiaohua Wang Yigang He Yulou Peng Jie Xiong Department of Electrical and Information Engineering Hunan University Changsha China Department of Electrical and Information Engineering Changsha University of Science and Technology Changsha China

this paper addresses the design problem of linear-phase finite-impulse response (FIR) notch filters based on a neural networks optimization technique. the main idea is to minimize the weighted square-error function in the frequency-domain. the convergence theorem of the neural networks algorithm is proved to illustrate the proposed algorithm stable, and the implementation of the approach is also described together with some design guidelines. the solution is presented as a parallel algorithm to approximate the desired frequency response specification. thus, the method avoids matrix inversion, and makes a fast calculation of the filter's coefficients possible. Some optimal design examples are given to demonstrate the effectiveness of the proposed design method

关键词： Finite impulse response filter Neural networks IIR filters Band pass filters Frequency Signal processing algorithms Digital filters Digital signal processing Information filtering Information filters

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