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检索条件"任意字段=Proceedings of the first international symposium on Databases in parallel and distributed systems"

共 796 条记录，以下是181-190 订阅

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parallel CBIR System for Efficient Hyperspectral Image Retrieval from Heterogeneous Networks of Workstations

Parallel CBIR System for Efficient Hyperspectral Image Retri...

引用

international symposium on Symbolic and Numeric Algorithms for Scientific Computing (SYNASC)

作者： Antonio Plaza Javier Plaza Abel Paz Soraya Blazquez Department of Technology of Computers and Communications Polytechnic School of Caceres University of Extremadura Caceres Spain

The purpose of content-based image retrieval (CBIR) is to retrieve, from real data stored in a database, information that is relevant to a query. In remote sensing applications, the wealth of spectral information provided by last-generation (hyperspectral) instruments has quickly introduced the need for parallel CBIR systems able to effectively retrieve features of interest from ever-growing data archives. To address this need, this paper develops a new parallel CBIR system which has been specifically designed to be run on heterogeneous networks of computers (HNOCs). These platforms have soon become a standard computing architecture in remote sensing missions due to the distributed nature of data repositories. The proposed heterogeneous system first extracts an image feature vector able to characterize image content with sub-pixel precision, and then uses the obtained feature as a search reference. The system is validated using a complex hyperspectral image database, and implemented on several networks of workstations at University of Maryland.

关键词： Hyperspectral imaging Image retrieval Workstations Hyperspectral sensors Information retrieval Content based retrieval Image databases Remote sensing Spatial databases Instruments

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Automatic Program Segment Similarity Detection in Targeted Program Performance Improvement

Automatic Program Segment Similarity Detection in Targeted P...

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international symposium on parallel and distributed Processing (IPDPS)

作者： Haiping Wu Eunjung Park Mihailo Kaplarevic Yingping Zhang Murat Bolat Xiaoming Li Guang R. Gao Department of Electrical and Computer Engineering University of Delaware Newark DE USA Digital Enterprise Group Intel Corporation Chandler AZ USA

Targeted optimization of program segments can provide an additional program speedup over the highest default optimization level, such as -O3 in GCC. The key challenge is how to automatically search for performance sensitive program segments in a given code, to which a customized set of optimization compiler options could be applied. In this paper we propose a method for automatic detection of performance sensitive program segments based on program segment similarity. first we create a proxy segment template database trained over a set of random input programs. The compiler identifies program segments by correlating them to the pre-build proxy segment templates using the syntax structure and architecture-dependent behavior similarity. We argue that the identified program segments can be custom optimized to improve the overall program performance. The method is evaluated on the Intel XScale PXA255 platform using randomly selected benchmarks. The experimental results show that our method can provide additional speedups over the highest optimization level in GCC 3.3 (-O3) for an arbitrary set of applications.

关键词： Optimizing compilers Program processors Optimization methods Data structures databases High performance computing Learning systems Kernel

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parallel and distributed computing with Java

Parallel and distributed computing with Java

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5th international symposium on parallel and distributed Computing

作者： Baker, Mark A. Grove, Matthew Shafi, Aamir Univ Reading Sch Syst Engn Reading RG6 6AY Berks England Univ Portsmouth DSG Portsmouth PO1 2UP Hants England

ISBN: (纸本)0769526381

The Java language first came to public attention in 1995. Within a year, it was being speculated that Java may be a good language for parallel and distributed computing. Its core features, including being objected oriented and platform independence, as well as having built-in network support and threads, has encouraged this view. Today, Java is being used in almost every type of computer-based system, ranging from sensor networks to high performance computing platforms, and from enterprise applications through to complex ***. In this paper the key features that make Java a good language for parallel and distributed computing are first discussed. Two Java-based middleware systems, namely MPJ Express, an MPI-like Java messaging system, and Tycho, a wide-area asynchronous messaging framework with an integrated virtual registry are then discussed. The paper concludes by highlighting the advantages of using Java as middleware to support distributed applications.

关键词： distributed computer systems

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Austrian Grid: Overview on the project with focus on parallel applications

Austrian Grid: Overview on the project with focus on paralle...

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5th international symposium on parallel and distributed Computing

作者： Volkert, Jens Johannes Kepler Univ Inst Graph & Parallel Proc A-4040 Linz Austria

ISBN: (纸本)0769526381

GRIDs are large-scale distributed computing infrastructures that enable the integrated and collaborative use of high-end computers, networks, databases, and scientific instruments owned and managed by multiple organizations. Currently, a lot of national and international grid projects aim in building and using grids. One of them is the Austrian Grid. This project targets different areas of applications, including medical sciences, high-energy physics, applied numerical simulations, astrophysical simulations and solar observations, as well as meteorology and geophysics. Corresponding to the previous experience of the initiators of the project a lot of the applications are parallele ones. In the first part of the talk an overview on Austrian Grid will be presented. We will speak about the goals and the results in general. In the second part of the lecture the focus will be on parallel applications. We will discuss some answers given by the research of Austrian Grid to questions like: how to map parallel applications onto a grid, which kind of tools are necessary, which extensions of standard middleware are desirable. © 2006 IEEE.

关键词： Grid computing

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A new persistence framework for parallel and distributed simulation

A new persistence framework for parallel and distributed sim...

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1st international Multi symposium on Computer and Computational Sciences

作者： Qiao, Haiquan Ju, Rusheng Li, Ge Huang, Kedi Natl Univ Def Technol Sch Mechatron Engn & Automat Changsha 410073 Hunan Province Peoples R China

ISBN: (纸本)0769525814

Persistence is used not only in load-balancing systems but also in simulation checkpoint and restart, and it is very important in parallel and distributed simulation. SPEEDES Persistence Framework (SPF) is a layer of the proposed Standard Simulation Architecture (SSA), and Boost Serialization Library is a library of Boost for persistence. This paper first describes these two framework, and then applies them in a parallel and distributed system. The userfriendliness and performance of SPF and BSL are evaluated and analyzed, at last the conclusion. is given that BSL is a more suitable persistence framework for parallel and distributed simulation.

关键词： parallel processing systems

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distributed, real-time programming on commodity POSIX systems:: A preliminary report

Distributed, real-time programming on commodity POSIX system...

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5th international symposium on parallel and distributed Computing

作者： Bruda, Stefan D. Haggholm, Petter Stoddard, Scott Bishops Univ Dept Comp Sci Sherbrooke PQ J1M 0C8 Canada

ISBN: (纸本)0769526381

We present an incipient implementation of a programming language that allows programming of real-time applications distributed over a network. We have several goals in mind: first, the language should be built on a sound semantics and offer support for model-based conformance testing. At the same time the language should place the normal programmer (who tends to shy away from exceedingly formal constructs) in a comfortable environment. Thirdly, programs written in this language should run on commodity systems, without relying on real-time support from the kernel. Finally, the language separates the code from timing restrictions, thus allowing for code re-use.

关键词： Computer programming languages

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A micropower vision processor for parallel object positioning and sizing

A micropower vision processor for parallel object positionin...

引用

IEEE international symposium on Circuits and systems

作者： Constandinou, Timothy G. Toumazou, Chris Imperial Coll London Inst Biomed Engn South Kensington Campus London SW7 2AZ England

ISBN: (纸本)9780780393899

A hybrid vision chip is presented for real-time object-based processing for tasks such as positioning and sizing of enclosed objects. This system presents the first artificial silicon retina capable of position and size determination of multiple objects in true parallel fashion. Based on a novel distributed algorithm, this approach uses the input image to enclose a feedback. loop to realise a data-driven pulsating action. The fabricated device is shown to achieve a computation-efficiency of at least 725 million instructions per second per milliwatt and capable of processing up to 2000 frames per second.

关键词： Computer vision

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parallelization of similarity search in large time series databases

Parallelization of similarity search in large time series da...

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1st international Multi symposium on Computer and Computational Sciences

作者： Qiao, Jonathan Ye, Yang Zhang, Chaoyang Converse Coll Spartanburg SC 29302 USA Univ South Mississippi Hattiesburg 39401 MS USA

ISBN: (纸本)0769525814

In this paper, an efficient parallel algorithm to search large time series databases is proposed. There are existing parallel algorithms for performing such tasks, which generally utilize multidimensional tree structures and thus are subjected to the performance of multidimensional trees. On the other hand, there have been a number of serial algorithms proposed in the past decade. Most of them use certain transformation techniques to reduce the dimensionality and then build an index to facilitate the search process. This again results in performance degradation. This work develops a parallel algorithm to process range query and k-nearest neighbor query in parallel time series databases, assuming a shared nothing multi-processor architecture. Both analytical and experimental results show that the new approach has near linear scaleup and linear speedup with little more effort than non-index based sequential scan and thus another alternative to index based approach.

关键词： Database systems

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A virtual plant ecosystem featuring parallel computing and distributed visualization

A virtual plant ecosystem featuring parallel computing and d...

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1st international Multi symposium on Computer and Computational Sciences

作者： Huang, Zhengge Zheng, Yao Xie, Lijun Yang, Tingjun Zhejiang Univ Coll Comp Sci Hangzhou 310027 Zhejiang Peoples R China

ISBN: (纸本)0769525814

A parallel plant ecosystem simulation, running on a computer cluster with commodity graphic cards, is performed to simulate and visualize large groups of plants. With a scalable architecture, the system can simulate very large and complex plant ecosystem in much shorter time than the traditional. The extreme complexity is first simplified by using multilevel models, and then dividing into multiple parts and simulating parallel. The entire simulation process is visualized in an immersive mode approximately in real time by rendering the results locally and concatenated to a large display wall.

关键词： parallel processing systems

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CSP-based study on distributed PDM and consistency control technique for aero-subcontract production

CSP-based study on distributed PDM and consistency control t...

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1st international Multi symposium on Computer and Computational Sciences

作者： Jiang, Zhiqiang Feng, Xilan Hu, Zhongyan Zhengzhou Inst Aeronaut Dept Mech Engn Zhengzhou Peoples R China

ISBN: (纸本)0769525814

The distributed product data management (DPDM) is the key effectively of the remote collaborative designing and manufacturing for complex product. A study project on DPDM and consistency control techniques based on collaborative service platform (CSP) in aero subcontract production (Aero-SP) is put forwarded. first, in order to settle the problem of data exchange and share, collaborative work/flow management among multiple PDM systems are critical processes for geographically distributed design and manufacturing systems. A distributed and open integrated product data management framework was developed based on a collaborative service platform by analyzing the technical performance of distributed product data management. The data communication method and safety assurance mechanism are also discussed A simple portal is provided web-based accessing for collaborative manufacturing enterprise, and actualized expediently the data exchange, share, querying and process collaborative management. Second, in order to settle the problem of product data consistency in remote environment among dynamic alliance enterprises in Aero-SP, the distributed store strategy of product data based on original and duplicate data cooperation technique is designed and the coordinate process structure based on multi-server cooperation is setup according to the creating position and using attribute of product data. Further more, the initiative and automatic check between the central and secondary product databases among dynamic alliance enterprises is implemented by top-down product data consistency checking technique. All key enabling techniques were practiced in Aero-SP of aviation project and the consistency controlling approach was verified.

关键词： aero-SP CSP DPDM distributed design and manufacturing consistency control technology

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