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检索条件"任意字段=10th International Conference on Algorithms and Architectures for Parallel Processing"

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Digital calibration techniques for interstage gain nonlinearity in pipelined ADCs

Digital calibration techniques for interstage gain nonlinear...

引用

international conference on ASIC

作者： Chaojie Fan Wenjie Pan Ke Wang Jianjun Zhou Center for Analog/RF IC Shanghai Jiao Tong University Shanghai China

Main digital calibration techniques for interstage gain nonlinearity in low-power, high-speed pipelined analog to digital converter (ADC) designs published in recent years are overviewed in this paper. Two novel digital calibration techniques are proposed and compared with other main digital calibration techniques in terms of the efficiency, convergence time, complexity, limitations, and cost.

关键词： Calibration Capacitors Quantization (signal) parallel processing Noise Equations Mathematical model

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A parallel Fusion Algorithm of Remote Sensing Images Based on Wavelet Transform

A Parallel Fusion Algorithm of Remote Sensing Images Based o...

引用

IEEE international conference on High Performance Computing and Communications (HPCC)

作者： Xiaorong Xue Fang Xiang Hongfu Wang Jinxi Peng School of Computer and Information Engineering Anyang Normal University Anyang China

To play the advantages of a variety of remote sensing data, the application of remote sensing image fusion is a very important choice. Remote sensing image fusion is large in computing capacity and time-consuming, and with the development of modern remote sensing technology, the amount of various remote sensing data obtained is larger and larger, how to fuse remote sensing image quickly and accurately and getting useful information is becoming more and more urgent especially in some remote sensing applications such as disaster prevention and relief quick, etc. Based on the advantage of wavelet transform in information processing and the advantage of parallel computing in high-performance computing, a parallel fusion algorithm of remote sensing images based on wavelet transform is proposed in the paper. In the method, based on parallel computing, the low-frequency components of wavelet decomposition are fused with the fusion rule based on the feature matching, and the high-frequency components of wavelet decomposition are fused with the fusion rule based on the sub region variance. then the low-frequency components and the high-frequency components after fusion are processing with the inverse wavelet transform, and the fused image is gotten. the result shows that the proposed method can get better fusion results and faster computing speed.

关键词： Remote sensing Image fusion Computers parallel processing Wavelet coefficients

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On the parallel simulation of magnetic targeting of nanoparticles in capillaries

On the parallel simulation of magnetic targeting of nanopart...

引用

international Joint conference on Computer Science and Software Engineering (JCSSE)

作者： Chantana Chantrapornchai Banpot Dolwithayakul Department of Computing Faculty of Science Silpakorn University Thailand

ISBN: (纸本)9781479908059

We develop a parallel algorithm, by using CUDA, for calculating the concentration of multifunctional magnetic nanoparticles in capillaries under the influences of magnetic force, blood flow and diffusion process. the task of computing particle, concentration on the considered plane is distributed to computational threads. the continuity equation describing the time rate of change of the multifunctional particle concentration in each small element on the considered plane is solved via the explicit finite different method. the simulation results show the distributions of particle concentration on the focused plane in the blood vessel which are useful visualization for the biomedical researchers. the performance of parallel computing is also examined.

关键词： Computational modeling Graphics processing units Mathematical model Finite element analysis Blood vessels Nanoparticles Equations

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Integral image computation on GPU

Integral image computation on GPU

引用

IEEE SSD international Multi-conference on Systems, Signals and Devices

作者： Marwa Chouchene Fatma Ezahra Sayadi Mohamed Atri Rached Tourki Laboratory of Electronics and Microelectronics (E++E) Faculty of Sciences of Monastir Monastir Tunisia

ISBN: (纸本)9781467364591

In this paper we present an integral image algorithm that can run in real-time on a Graphics processing Unit (GPU). Our system exploits the parallelisms in computation via the NVIDA CUDA programming model, which is a software platform for solving non-graphics problems in a massively parallel high performance fashion. We compare the performance of the parallel approach running on the GPU with the sequential CPU implementation across a range of image sizes.

关键词： Graphics processing units Instruction sets Programming Computer architecture Kernel Computer vision Laboratories

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Random Walk Based Inverse Influence Research in Online Social Networks

Random Walk Based Inverse Influence Research in Online Socia...

引用

IEEE international conference on High Performance Computing and Communications (HPCC)

作者： Zhaoyan Jin Quanyuan Wu Dianxi Shi Huining Yan National Key Laboratory for Parallel and Distributed Processing NUDT Changsha Hunan P.R.China

ISBN: (纸本)9781479909735

In online social networks, social influence of a user reflects his or her reputation or importance in the whole network or to a personalized user. Social influence analysis can be used in many real applications, such as link prediction, friend recommendation and personalized searching. Personalized Page Rank, which ranks nodes according to the probabilities that a random walk starting from a personalized node stops at all nodes, is one of the most popular metrics for influence analysis. In this paper, we study the problem of inverse influence in online social networks. Different from Personalized Page Rank, the inverse influence for a personalized node ranks nodes according to the probabilities that all nodes stop at the personalized node in limited steps. We propose two computation models for inverse influence, i.e., the random walk based and the path based. Both of the models have high computation complexity, and cannot be used in large graphs, so we propose a Monte Carlo based approximation algorithm. Experiments from synthetic and real world datasets show that, our algorithm has equivalent or even better accuracy than related researches in link prediction, and thus can be used in friend recommendation in online social networks.

关键词： Prediction algorithms Social network services Equations Mathematical model Accuracy Approximation algorithms Measurement

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Data level parallelism for H264/AVC baseline intra-prediction chain on MPSoC

Data level parallelism for H264/AVC baseline intra-predictio...

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IEEE SSD international Multi-conference on Systems, Signals and Devices

作者： Nidhameddine Belhadj Najmeddine Bahri M. Ali Ben Ayed Zied Marrakchi Habib Mehrez Electronics and Information Technology Laboratory ENIS University of Sfax Sfax Tunisia Laboratory of Computer Sciences LIP6 University of Pierre and Marie Curie Paris France

ISBN: (纸本)9781467364591

Currently, higher resolutions and faster frame rates are more and more demanded in real time video application. Consequently, encoder complexity and performance are the main penalties for such requirements. the emerging Multiprocessor System on Chip (MPSoC) architecture is a promising way for following the evolving video encoding applications, which can overcome the limitation of real-time processing with a single processor. thus parallel computing for H.264/AVC encoder on multiprocessor is becoming a major research point that can resolve real time constraints. We contribute to this challenge by proposing MPSoC architecture for the intra prediction module, which is an important part of the H.264/AVC video encoder, using data level parallelism (DLP) approach. In this paper, we present an efficient partitioning of data for parallel processing for intra prediction; this approach is tested and evaluated on an open platform for virtual prototyping (SoCLiB). Experimental results show a gain of 74% in encoding speed when using four processors, and enabling minimum memory size and surface of MPSoC. Furthermore, our results highlight the relationship between the number of processors and the encoding run time.

关键词： Video coding Encoding Computer architecture Standards Partitioning algorithms Streaming media parallel processing

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H.264 video parallel decoder on a 24-core processor

H.264 video parallel decoder on a 24-core processor

引用

international conference on ASIC

作者： Shikai Zhu Zheng Yu Shile Cui Zhiyi Yu Xiaoyang Zeng State Key Lab of ASIC and System Fudan University Shanghai P. R. China

this paper presents an implementation of H.264 decoder on a 24-core processor. H.264 provides many new features that require complex computations compared to the previous video coding standards, thus introduces great challenges to implement it efficiently. Multiprocessor emerges as a good solution because it provides high parallelism rather than high clock frequency to improve the system performance energy efficiently. By utilizing hardware accelerators and different levels of parallelism mechanism including function-level parallelism, data-level parallelism and thread-level parallelism, our proposed H.264 decoder shows a throughput of 58fps@720p at 800MHz with 780mW power dissipation.

关键词： Decoding Entropy Multicore processing Pipelines parallel processing Power dissipation throughput

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GPU-Based Barrel Distortion Correction for Acceleration

GPU-Based Barrel Distortion Correction for Acceleration

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IEEE international conference on High Performance Computing and Communications (HPCC)

作者： Luo Shuhua Zhang Jun School of Information Science and Engineering Central South University Hunan Engineering Laboratory for Advanced Control and Intelligent Automation Changsha China

Geometric correction is a practical and effective barrel distortion correction method. It mainly consists of two stages: the first stage is to take coordinates mapping from distortion image to correction image, the second stage is bilinear interpolation. It involves a certain amount of calculation, and the larger the image is, the more the quantity of calculation is. What's more, the processing speed of geometric correction implemented on central processing unit (CPU) can't meet the need of high-speed in real-time application fields. Compared with serial processing pipeline of CPU, graphics processing unit (GPU) has special parallel processing pipeline which is suitable and fast for mass data calculation in parallel. therefore, it can provide an implementation of geometric correction on GPU with considerable acceleration effect. the paper proposes an implementation of geometric correction on GPU by using open graphics library (OpenGL) and graphics library shading language (GLSL) for portability. the experiment results show that the full execution performance of the implementation on GPU is over 190 times speedup of that completely on CPU at most, which obtains a high-speed processing effect.

关键词： Graphics processing units Nonlinear distortion Interpolation Lenses Libraries Acceleration

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Loop level speculation in a task based programming model

Loop level speculation in a task based programming model

引用

international conference on High Performance Computing

作者： Rahulkumar Gayatri Rosa. M Badia Eduard Aygaude Barcelona Supercomputing Center Barcelona Spain

Uncountable loops (such as while loops in C) and if-conditions are some of the most common constructs in programming. While-loops are widely used to determine the convergence in linear algebra algorithms or goal finding problems from graph algorithms, to name a few. In general while-loops are used whenever the loop iteration space, the number of iterations a loop executes is unknown. Usually in while-loops, the execution of the next iteration is decided inside the current loop iteration (i.e. the execution of iteration i depends on the values computed in iteration i-1). this precludes their parallel execution in today's ubiquitous multi-core architectures. In this paper a technique to speculatively create parallel tasks from the next iterations before the current one completes is proposed. If consecutive loop-iterations are only control dependent, then multiple iterations can be executed simultaneously; later in the execution path, the runtime system will decide to either commit the results of such speculatively executed iterations or undo the changes made by them. Data dependences within or between non-speculative and speculative work are honored to guarantee correctness. the proposed technique is implemented in SMPSs, a task-based dataflow programming model for shared-memory multiprocessor architectures. the approach is evaluated on a set of applications from graph algorithms and linear algebra. Results are promising with an average increase in the speedup of 1.2x with 16 threads when compared to non speculative execution of the applications. the increase in the speedup is significant, since the performance gain is achieved over an already parallelized version of the benchmarks.

关键词： Runtime Synchronization Cascading style sheets parallel processing Computer architecture Instruction sets Programming

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A FPGA real-time stereo vision system with luminance control and projected pattern

A FPGA real-time stereo vision system with luminance control...

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international conference on ASIC

作者： Yuan Xu Haodong Yao Liwei Gong Mingcheng Zhu Robert K. F. Teng Shenzhen Key Lab of Advanced Communication and Information Processing College of Information Engineering Shenzhen University 518000 China Department of Electrical Engineering California State University Long Beach USA

this paper presents a real-time stereo video processing system based on FPGA. the system takes rectification and histogram equalization as its pre-processing, and the depth detection of this system is using generalized census transform and block matching method. With the help of on-line generated projected pattern by the pattern controller inside FPGA, this system can be used in various environments. the median filter is used as the post-processing step of depth map. In comparison to the software solution method, this system takes the advantage of the parallel nature of FPGA and got higher speed in generating the depth map. therefore, it can be applied to the applications demanded for better performance.

关键词： Histograms Field programmable gate arrays Real-time systems Stereo vision Hardware Transforms Hamming distance

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