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

共 2885 条记录，以下是1451-1460 订阅

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An Ensemble Approach to Improve Microaneurysm Candidate Extraction

An Ensemble Approach to Improve Microaneurysm Candidate Extr...

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7th international Joint conference on e-Business and Telecommunications (ICETE)

作者： Antal, Balint Lazar, Istvan Hajdu, Andras Univ Debrecen Fac Informat H-4010 Debrecen Hungary

ISBN: (纸本)9783642252051

In this paper, we present a novel approach to microaneurysm candidate extraction. To strengthen the accuracy of individual algorithms, we propose an ensemble of state-of-the-art candidate extractors. We apply a simulated annealing based method to select an optimal combination of such algorithms for a particular dataset. We also present a novel classification technique, which is based on a parallel ensemble of kernel density estimators. the experimental results show improvement in the positive likelihood rate compared to the individual candidate extractors.

关键词： Biomedical image processing Image classification Pattern recognition Medical decision-making Statistics

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GapMis-OMP: Pairwise short-read alignment on multi-core architectures

GapMis-OMP: Pairwise short-read alignment on multi-core arch...

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8th international Workshop on Artificial Intelligence Applications and Innovations, AIAI 2012: AIAB, AIeIA, CISE, COPA, IIVC, ISQL, MHDW, and WADTMB

作者： Flouri, Tomáš Iliopoulos, Costas S. Park, Kunsoo Pissis, Solon P. Heidelberg Institute for Theoretical Studies Germany Dept. of Informatics King's College London United Kingdom Dept. of Mathematics and Statistics University of Western Australia Australia School of Computer Science and Engineering Seoul National University Korea Republic of Florida Museum of Natural History University of Florida United States

ISBN: (纸本)9783642334115

Pairwise sequence alignment has received a new motivation due to the advent of next-generation sequencing technologies, particularly so for the application of re-sequencing-the assembly of a genome directed by a reference sequence. After the fast alignment between a factor of the reference sequence and a high-quality fragment of a short read by a short-read alignment programme, an important problem is to find the alignment between a relatively short succeeding factor of the reference sequence and the remaining low-quality fragment of the read allowing a number of mismatches and the insertion of a single gap in the alignment. In this article, we present GapMis-OMP, a tool for pairwise short-read alignment that works on multi-core architectures. It is designed to compute the alignments between all the sequences in a first set of sequences and all those from a second one in parallel. the presented experimental results demonstrate that GapMis-OMP is more efficient than most popular tools. © 2012 IFIP international Federation for Information processing.

关键词： Computer architecture

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Scheduling parallel Programs Based on Architecture-Supported Regions

Scheduling Parallel Programs Based on Architecture-Supported...

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9th international conference on parallel processing and Applied Mathematics (PPAM)

作者： Tudruj, Marek Masko, Lukasz Polish Acad Sci Inst Comp Sci PL-01237 Warsaw Poland

ISBN: (纸本)9783642314995;9783642315008

Modern multicore processor technology can fairly easily deliver special accelerator processors dedicated to fast optimised execution of critical computational functions. Multi CMP (Chip Multi-Processor) systems can be composed as a set of dedicated and general purpose computational modules interconnected by a global data exchange network. the paper proposes special program scheduling algorithms for such systems. Dedicated CMP modules assumed in the paper are based on a new data communication model called communication on the fly. It enables strong reduction of inter process and inter core communication overheads for intensively shared data.

关键词： Electronic data interchange

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MultiUN v2: UN Documents with Multilingual Alignments 8

MultiUN v2: UN Documents with Multilingual Alignments

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8th international conference on Language Resources and Evaluation (LREC)

作者： Chen, Yu Eisele, Andreas LT Lab DFKI GmbH D-66123 Saarbrucken Germany DGT L-2920 Luxembourg Luxembourg

ISBN: (纸本)9782951740877

MultiUN is a multilingual parallel corpus extracted from the official documents of the United Nations. It is available in the six official languages of the UN and a small portion of it is also available in German. this paper presents a major update on the first public version of the corpus released in 2010. this version 2 consists of over 513, 091 documents, including around 9% of new documents retrieved from the United Nations official document system. Compared to the first release, we applied several modifications to the corpus preparation method. In this paper, we describe the methods we used for processing the UN documents and aligning the sentences. the most significant improvement compared to the previous release is the newly added multilingual sentence alignment information. the alignment information is encoded together with the text in XML instead of additional files. Our representation of the sentence alignment allows quick construction of aligned texts parallel in arbitrary number of languages, which is essential for building machine translation systems.

关键词： United Nations parallel corpus multilingual machine translation crosslingual

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the Trilingual ALLEGRA Corpus: Presentation and Possible Use for Lexicon Induction 8

The Trilingual ALLEGRA Corpus: Presentation and Possible Use...

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8th international conference on Language Resources and Evaluation (LREC)

作者： Scherrer, Yves Cartoni, Bruno Univ Geneva Dept Linguist CH-1211 Geneva 4 Switzerland

ISBN: (纸本)9782951740877

In this paper, we present a trilingual parallel corpus for German, Italian and Romansh, a Swiss minority language spoken in the canton of Grisons. the corpus called ALLEGRA contains press releases automatically gathered from the website of the cantonal administration of Grisons. Texts have been preprocessed and aligned with a current state-of-the-art sentence aligner. the corpus is one of the first of its kind, and can be of great interest, particularly for the creation of natural language processing resources and tools for Romansh. We illustrate the use of such a trilingual resource for automatic induction of bilingual lexicons, which is a real challenge for under-represented languages. We induce a bilingual lexicon for German-Romansh by phrase alignment and evaluate the resulting entries with the help of a reference lexicon. We then show that the use of the third language of the corpus Italian as a pivot language can improve the precision of the induced lexicon, without loss in terms of quality of the extracted pairs.

关键词： trilingual parallel corpora lexicon induction under-represented languages Romansh

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Portuguese text generation from large corpora 8

Portuguese text generation from large corpora

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8th international conference on Language Resources and Evaluation, LREC 2012

作者： De Novais, Eder M. Paraboni, Ivandré Da Silva, Douglas F. P. School of Arts Sciences and Humanities University of São Paulo Av. Arlindo Bettio 1000 São Paulo Brazil

ISBN: (纸本)9782951740877

In the implementation of a surface realisation engine, many of the computational techniques seen in other AI fields have been widely applied. Among these, the use of statistical methods has been particularly successful, as in the so-called 'generate-and-select', or 2-stages architectures. Systems of this kind produce output strings from possibly underspecified input data by over-generating a large number of alternative realisations (often including ungrammatical candidate sentences.) these are subsequently ranked with the aid of a statistical language model, and the most likely candidate is selected as the output string. Statistical approaches may however face a number of difficulties. Among these, there is the issue of data sparseness, a problem that is particularly evident in cases such as our target language - Brazilian Portuguese - which is not only morphologically-rich, but relatively poor in NLP resources such as large, publicly available corpora. In this work we describe a first implementation of a shallow surface realisation system for this language that deals with the issue of data sparseness by making use of factored language models built from a (relatively) large corpus of Brazilian newspapers articles.

关键词： Natural language processing systems

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A distributed data-parallel framework for analysis and visualization algorithm development 5

A distributed data-parallel framework for analysis and visua...

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5th Workshop on General-Purpose Computation on Graphics processing Units, GPGPU-5 - Held in Cooperation with ACM ASPLOS XVII

作者： Meredith, Jeremy S. Sisneros, Robert Pugmire, David Ahern, Sean Oak Ridge National Laboratory 1 Bethel Valley Road Oak Ridge TN 37831 United States National Center for Supercomputing Applications University of Illinois at Urbana-Champaign 1205 W. Clark St Urbana IL 61801 United States

ISBN: (纸本)9781450312332

the coming generation of supercomputing architectures will require fundamental changes in programming models to effectively make use of the expected million to billion way concurrency and thousand-fold reduction in per-core memory. Most current parallel analysis and visualization tools achieve scalability by partitioning the data, either spatially or temporally, and running serial computational kernels on each data partition, using message passing as needed. these techniques lack the necessary level of data parallelism to execute effectively on the underlying hardware. this paper introduces a framework that enables the expression of analysis and visualization algorithms with memory-efficient execution in a hybrid distributed and data parallel manner on both multi-core and many-core processors. We demonstrate results on scientific data using CPUs and GPUs in scalable heterogeneous systems. © 2012 ACM.

关键词： Message passing

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An implementation of parallel 2-D FFT using intel AVX instructions on multi-core processors

An implementation of parallel 2-D FFT using intel AVX instru...

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12th international conference on algorithms and architectures for parallel processing, ICA3PP 2012

作者： Takahashi, Daisuke Faculty of Engineering Information and Systems University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8573 Japan

ISBN: (纸本)9783642330643

In this paper, we propose an implementation of a parallel two-dimensional fast Fourier transform (FFT) using Intel Advanced Vector Extensions (AVX) instructions on multi-core processors. the combination of vectorization and a block two-dimensional FFT algorithm is shown to effectively improve performance. We vectorized FFT kernels using the AVX instructions. Performance results of two-dimensional FFTs on multi-core processors are reported. We successfully achieved a performance of over 61 GFlops on an Intel Xeon E5-2670 (2.6 GHz, two CPUs, 16 cores) and over 24 GFlops on an Intel Core i7-3930K (3.2 GHz, one CPU, six cores) for a 212 x 212-point FFT. © 2012 Springer-Verlag.

关键词： Fast Fourier transforms

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BIDE-based parallel mining of frequent closed sequences with MapReduce

BIDE-based parallel mining of frequent closed sequences with...

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12th international conference on algorithms and architectures for parallel processing, ICA3PP 2012

作者： Yu, Dongjin Wu, Wei Zheng, Suhang Zhu, Zhixiang School of Computer Hangzhou Dianzi University Hangzhou China Zhejiang Provincial Key Laboratory of Network Technology and Information Security Hangzhou China

ISBN: (纸本)9783642330643

parallel processing is essential to mining frequent closed sequences from massive volume of data in a timely manner. On the other hand, MapReduce is an ideal software framework to support distributed computing on large data sets on clusters of computers. In this paper, we develop a parallel implementation of BIDE algorithm on MapReduce, called BIDE-MR. It iteratively assigns the tasks of closure checking and pruning to different nodes in cluster. After one round of map-combine-partition-reduce, the closed frequent sequences with round-specific length and the candidates for the next round of computation are generated. Since the candidates and their pseudo project databases are independent with each other, BIDE-MR achieves high speed-ups. We implement BIDE-MR on an Apache Hadoop cluster and use BIDE-MR to mine the vehicles which frequently appear together from massive records collected at different monitoring sites. the results show that BIDE-MR attains good parallelization. © 2012 Springer-Verlag.

关键词： MapReduce

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HADAB: Enabling Fault Tolerance in parallel Applications Running in Distributed Environments 1

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9th international conference on parallel processing and Applied Mathematics (PPAM)

作者： Boccia, Vania Carracciuolo, Luisa Laccetti, Giuliano Lapegna, Marco Mele, Valeria Univ Naples Federico II Dept Appl Math Complesso Univ Monte S AngeloVia Cintia I-80126 Naples Italy Italian Natl Res Council Rome Italy

ISBN: (数字)9783642314643

ISBN: (纸本)9783642314636;9783642314643

the development of scientific software, reliable and efficient, in distributed computing environments, requires the identification and the analysis of issues related to the design and the deployment of algorithms for high-performance computing architectures and their integration in distributed contexts. In these environments, indeed, resources efficiency and availability can change unexpectedly because of overloading or failure i.e. of both computing nodes and interconnection network. the scenario described above, requires the design of mechanisms enabling the software to "survive" to such unexpected events by ensuring, at the same time, an effective use of the computing resources. Although many researchers are working on these problems for years, fault tolerance, for some classes of applications is an open matter still today. Here we focus on the design and the deployment of a checkpointing/migration system to enable fault tolerance in parallel applications running in distributed environments. In particular we describe details about HADAB, a new hybrid checkpointing strategy, and its deployment in a meaningful case study: the PETSc Conjugate Gradient algortithm implementation. the related testing phase has been performed on the University of Naples distributed infrastructure (***.P.E. infrastructure).

关键词： Fault tolerance checkpointing PETSc library HPC and distributed environments

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