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检索条件"任意字段=5th International Symposium on Parallel and Distributed Computing"

共 1516 条记录，以下是531-540 订阅

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Blocking LU Decomposition for FPGAs

Blocking LU Decomposition for FPGAs

引用

Annual IEEE symposium on Field-Programmable Custom computing Machines (FCCM)

作者： Guiming Wu Yong Dou Gregory D. Peterson National Laboratory for Parallel & Distributed Processing National University of Defense Technology Changsha China Electrical Engineering and Computer Science University of Tennessee Knoxville TN USA

To efficiently perform large matrix LU decomposition on FPGAs with limited local memory, the original algorithm needs to be blocked. In this paper, we propose a block LU decomposition algorithm for FPGAs, which is applicable for matrices of arbitrary size. We introduce a high performance hardware design, which mainly consists of a linear array of processing elements (PEs), to implement our block LU decomposition algorithm. A total of 36 PEs can be integrated into a Xilinx Virtex-5 xc5vlx330 FPGA on our self-designed PCI-Express card, reaching a sustained performance of 8.50 GFLOPS at 133 MHz, which outperforms previous work.

关键词： Field programmable gate arrays Matrix decomposition Hardware Power engineering computing Algorithm design and analysis Linear algebra Computer applications Concurrent computing distributed computing Laboratories

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Optimal transmission power of wireless sensors for real-time systems in ship area networks

Optimal transmission power of wireless sensors for real-time...

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international symposium on Wireless Pervasive computing (ISWPC)

作者： Younghwan Yoo Munseok Choi Ki-Deok Kwon Han-You Jeong Dharma P. Agrawal School of Computer Science and Engineering Pusan National University Busan South Korea Institute of Logistics Information Technology Pusan National University Busan South Korea Department of Computer Science University of Cincinnati Cincinnati OH USA

ISBN: (纸本)9781424468553;9781424468584

Ship area networks (SANs) have lately attracted attention in order to guarantee the safety of sea travelers and marine transportation. the wireless sensor network (WSN) is one of the most important components of SAN because crew members must know any damage or malfunction of parts of ships promptly. the safety systems are mostly real-time applications, thus delay is the most important QoS requirement in SAN. Meanwhile, energy consumption is also a traditionally important metric in WSN. therefore, the goal of this paper is to find the minimum possible transmission power of each sensor node on the condition that it can meet delay constraint. Assuming the uniformly distributed sensor nodes, the proposed method firstly suggests the way to compute the average per-hop advancement with a single transmission. the difference from the actual simulation is less than 1% although it uses only nodal density information. Based on this per-hop advancement, the minimum possible transmission power is calculated, which can guarantee delay QoS for the predetermined ratio of connections in WSNs. the error-prone channel is also considered since packet transmission may frequently fail due to many equipments and ship body made of steel.

关键词： Wireless sensor networks Sensor systems Real time systems Marine vehicles Delay Storage area networks Marine safety Marine transportation Energy consumption distributed computing

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HiAL-Ckpt: A Hierarchical Application-Level Checkpointing for CPU-GPU Hybrid Systems

HiAL-Ckpt: A Hierarchical Application-Level Checkpointing fo...

引用

the 5th international Conference on Computer Science & Education(第五届国际计算机新技术与教育学术研讨会 ICCSE'10)

作者： Xinhai Xu Yufei Lin Tao Tang Yisong Lin National Laboratory for Parallel and Distributed Processing National University of Defense Technology Changsha China

In light of its powerful computing capacity and high energy efficiency, GPU (graphics processing unit) has become a focus in the research field of HPC (High Performance computing). CPU-GPU heterogeneous parallel systems have become a new development trend of super-computer. However, the inherent unreliability of the GPU hardware deteriorates the reliability of super-computer. We have researched on the fault-tolerance(FT) technique for CPU-GPU heterogeneous parallel systems, and introduced a new checkpointing mechanism, i.e., the hierarchical application-level checkpointing, for such systems. the basic idea of this new checkpointing mechanism is checkpointing at two independent levels, i.e., CPU level and GPU level, to tolerate CPU and GPU faults respectively. Based on the idea, we have also designed and implemented a hierarchical application-level checkpointing tool ”HiAL-Ckpt”. Using this tool, programmers can insert two kinds of directives, i.e., CPU directives and GPU directives into a program, and the compiler will transform the directives into CPU or GPU checkpointing codes according to their nature. From the case study of SWIM, a test bench from spec2000 benchmark suite, we have demonstrated the validity of the hierarchical application-level checkpointing technique. the experimental results show that the falut-tolerance temporal cost of HiAL-Ckpt for SWIM is only 2.25％, compared with the executing time of SWIM without any FT work.

关键词： GPU:heterogeneous systems:fault-tolerance checkpointing

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Unsupervised exploration of scientific articles

Unsupervised exploration of scientific articles

引用

5th international symposium on Applied Computational Intelligence and Informatics

作者： Alin-Adrian, Anton Vladimir-Ioan, Cretu Politehn Univ Timisoara Fac Automat & Comp Timisoara Romania

ISBN: (纸本)9781424444779

Unsupervised data exploration techniques are used for extracting relational and structural information from massifs of data. In this paper we explore a collection of ACM transactions and IEEE conferences related by the subject of high performance distributed computing - with a scientific computing flavor in order to understand how they relate to each other. the interpreted result is proved reasonable and is defined by groups of conferences and transactions which can be scaled by their degree of abstractness and physical realization.

关键词： distributed computer systems

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Serial distributed detection performance analysis in wireless sensor networks under noisy channel

Serial distributed detection performance analysis in wireles...

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5th international Conference on Wireless Communications, Networking and Mobile computing

作者： Yin, Liping Wang, Ying Yue, Dian-wu Dalian Maritime Univ Coll Informat Sci & Technol Dalian 116026 Peoples R China

ISBN: (纸本)9781424436927

In this paper, we consider the performance of serial distributed detection in wireless sensor networks (WSNs) under the assumption that the local decisions made by sensors are transmitted over noisy channels. Different from the parallel fusion, where the local results are directly sent to the fusion center, in serial fusion, local results are transmitted to the fusion center through multi-hop, short-range communications. We derive a fusion decision rule for serial signal detection, which takes the channel noise into account. And the simulation results show that the performance of serial distributed detection is inferior to that of parallel distributed detection, especially when the number of sensors is large. However, serial distributed detection utilizes short-range, multi-hop transmission, so it can be used as an energy-efficient distributed detection scheme for wireless sensor networks.

关键词： distributed detection serial WSN noisy channel energy conservation

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Market-Oriented Cloud computing: Vision, Hype, and Reality of Delivering computing as the 5^th Utility 09

Market-Oriented Cloud Computing: Vision, Hype, and Reality o...

引用

9th IEEE/ACM international symposium on Cluster computing and the Grid

作者： Buyya, Rajkumar Univ Melbourne Grid Comp & Distributed Syst Lab Dept Comp Sci & Software Engn Melbourne Vic 3010 Australia

ISBN: (纸本)9781424439355

computing is being transformed to a model consisting of services that are commoditised and delivered in a manner similar to utilities such as water, electricity, gas, and telephony. In such a model, users access services based on their requirements without regard to where the services are hosted. Several computing paradigms have promised to deliver this utility computing vision and they include Grid computing, P2P computing, and more recently Cloud computing. the latter term denotes the infrastructure as a “Cloud” in which businesses and users are able to access applications from anywhere in the world on demand. Hence, Cloud computing can be classed as a new paradigm for the dynamic creation of next-generation Data Centers by assembling services of networked Virtual Machines (VMs). thus, the computing world is rapidly transforming towards developing software for millions to consume as a service rather than creating software for millions to run on their PCs.

关键词： Cloud computing Computer vision Grid computing Telephony Application software Next generation networking Assembly Virtual machining Voice mail Personal communication networks

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PIC detector for joint distributed STBC under imperfect synchronization

PIC detector for joint distributed STBC under imperfect sync...

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5th international Conference on Wireless Communications, Networking and Mobile computing, WiCOM 2009

作者： Xin, Wang Zhuo, Wu Shanghai University China

ISBN: (纸本)9781424436934

In this paper, a new signal detection scheme using both parallel interference cancellation (PIC) and equalization for the efficient joint distributed space-time coding is proposed to suppress the impact of imperfect synchronisation in distributed cellular systems. Simulation results show that the proposed scheme outperforms the existing joint DSTBC decoded scheme in terms of BER. And also it achieves the same system capacity as the existing scheme. Meanwhile, a low structure and computational complexity has been retained. ©2009 IEEE.

关键词： Synchronization

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MPIXternal: A Library for a Portable Adjustment of parallel MPI Applications to Heterogeneous Environments

MPIXternal: A Library for a Portable Adjustment of Parallel ...

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23rd IEEE international parallel and distributed Processing symposium

作者： Clauss, Carsten Lankes, Stefan Bemmerl, thomas Rhein Westfal TH Aachen Chair Operating Syst D-52056 Aachen Germany

ISBN: (纸本)9781424437511

Nowadays, common systems in the area of high performance computing exhibit highly hierarchical architectures. As a result, achieving satisfactory;application performance demands an adaptation of the respective parallel algorithm to such systems. this, in turn, requires knowledge about the actual hardware structure even at the application level. However, the prevalent Message Passing Interface (MPI) standard (at least in its current version 2.1) intentionally hides heterogeneity from the application programmer in order to assure portability In this paper, we introduce the MPIXternal library which tries to Circumvent this obvious semantic gap within the current MPI standard. For this pur pose, the library offers the programmer additional features that should help to adapt applications to today's hierarchical systems in a convenient and portable way.

关键词： Hierarchical systems

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parallel Poisson Surface Reconstruction 1

引用

5th international symposium on Visual computing

作者： Bolitho, Matthew Kazhdan, Michael Burns, Randal Hoppe, Hugues Johns Hopkins Univ Dept Comp Sci Baltimore MD 21218 USA Microsoft Corp Microsoft Res Cambridge MA USA

ISBN: (数字)9783642103315

ISBN: (纸本)9783642103308

In this work we describe a parallel implementation of the Poisson Surface Reconstruction algorithm based on multigrid domain decomposition. We compare implementations using different;models of data-sharing between processors and show that a parallel implementation with distributed memory provides the best scalability. Using our method. we are able to parallelize the reconstruction of models from one billion data points on twelve processors across three machines. providing a ninefold speedup in run nit time without sacrificing reconstruction accuracy.

关键词： Surface reconstruction

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Performance analysis of two parallel relays with ARQ protocol

Performance analysis of two parallel relays with ARQ protoco...

引用

5th international Conference on Wireless Communications, Networking and Mobile computing, WiCOM 2009

作者： Lun, Tang Rong, Chai Qianbin, Chen Xiaoping, Zen ChongQing 400065 China College of Communication Engineering ChongQing University ChongQing 400044 China

ISBN: (纸本)9781424436934

Cooperative transmission is an efficient technique to realize diversity gain in wireless fading channels via a distributed way. In this paper, we consider a wireless network composed of a source, two parallel relays and a destination terminal. We exploit the limited feedback from the destination and propose cooperative ARQ protocols for two parallel relays. An analysis model to analyze and compare the data link layer packet error rate (PER) and throughput of cooperative transmission with joint relay selection and cooperative ARQ protocols for two parallel relays in slow fading wireless channel is established. Furthermore, the performance of this scheme are evaluated through numerical analysis and Monte-Carlo simulations and it is demonstrated that the proposed scheme can always achieve the lowest packet error rate (PER) and the highest throughput. ©2009 IEEE.

关键词： throughput

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