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2012 8th International Conference on Semantics, Knowledge and Grids, SKG 2012

作者： Wei, Xiao Luo, Xiangfeng Li, Qing School of Computing Engineering and Science High Performance Computing Center Shanghai University Shanghai 200072 China School of Computer Science and Information Engineering Shanghai Institute of Technology Shanghai 200235 China City University of Hong Kong Department of Computer Science City University of Hong Kong Hong Kong Hong Kong

ISBN: (纸本)9780769547947

Faceted search on web pages needs exact facets. However, it is difficult to extract facets exactly from web pages because the web pages are unstructured and lack of facet information. Therefore, facet extraction is a key to faceted search. This paper proposed a method of extracting facets automatically from unstructured web pages to improve the faceted search on web. The Multidimensional Semantic Index (MDSI) of web pages is constructed by mining all kinds of semantic relations among the words from web pages, which creates a semantic-rich index for web pages. In MDSI, the differently dimensional semantic indexes are bridged by mining the semantic mapping between them. Based on the MDSI of web pages, the facets are extracted by analyzing semantic mapping relations in MDSI. To validate the effect of the proposed method, two datasets are constructed and the experimental results show that the proposed method is feasible and comparatively precise. © 2012 IEEE.

关键词： Extraction

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A model-based approach to attributed graph clustering 12

A model-based approach to attributed graph clustering

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2012 ACM SIGMOD International Conference on Management of Data, SIGMOD '12

作者： Xu, Zhiqiang Ke, Yiping Wang, Yi Cheng, Hong Cheng, James School of Computer Engineering Nanyang Technological University Singapore Singapore Institute of High Performance Computing Singapore Singapore Department of Computer Science National University of Singapore Singapore Singapore Department of Systems Engineering and Engineering Management Chinese University of Hong Kong Hong Kong Hong Kong

ISBN: (纸本)9781450312479

Graph clustering, also known as community detection, is a long-standing problem in data mining. However, with the proliferation of rich attribute information available for objects in real-world graphs, how to leverage structural and attribute information for clustering attributed graphs becomes a new challenge. Most existing works take a distance-based approach. They proposed various distance measures to combine structural and attribute information. In this paper, we consider an alternative view and propose a model-based approach to attributed graph clustering. We develop a Bayesian probabilistic model for attributed graphs. The model provides a principled and natural framework for capturing both structural and attribute aspects of a graph, while avoiding the artificial design of a distance measure. Clustering with the proposed model can be transformed into a probabilistic inference problem, for which we devise an efficient variational algorithm. Experimental results on large real-world datasets demonstrate that our method significantly outperforms the state-of-art distance-based attributed graph clustering method. © 2012 ACM.

关键词： Data mining

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Analyzing the robustness of dynamic loop scheduling for heterogeneous computing systems

Analyzing the robustness of dynamic loop scheduling for hete...

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2012 11th International Symposium on Parallel and Distributed computing, ISPDC 2012

作者： Srivastava, Srishti Sukhija, Nitin Banicescu, Ioana Ciorba, Florina M. Mississippi State University Department of Computer Science and Engineering Mississippi State MS 39762 United States Technische Universität Dresden Center for Information Services and High Performance Computing 01062 Dresden Germany

ISBN: (纸本)9780769548050

Scheduling scientific applications in parallel on non-dedicated, heterogeneous systems, where the computing resources may differ in availability, is a challenging task, and requires efficient execution and robust scheduling methods. Dynamic loop scheduling methods provide means to achieve the desired robust performance. These methods are based on probabilistic analyses and are inherently robust. However, a methodology is required to measure the robustness of the dynamic loop scheduling methods that ensures their performance in unpredictably changing computing environments. In this paper, a methodology is proposed for performing robustness analysis of the dynamic loop scheduling techniques using a metric, formulated in earlier work, to measure their robustness in heterogeneous computing systems with uncertainties. The dynamic loop scheduling methods have been implemented in a simulation. The experimental results were used as an input to the proposed methodology, which in turn has been used to experimentally analyze the robustness of a number of dynamic loop scheduling methods on a heterogeneous system with variable availability. © 2012 IEEE.

关键词： Uncertainty analysis

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Smarter wheelchairs who can talk to each other: An integrated and collaborative approach

Smarter wheelchairs who can talk to each other: An integrate...

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2012 IEEE 14th International Conference on e-Health Networking, Applications and Services, Healthcom 2012

作者： Kong, Junjun Cao, Jiannong Liu, Yang Guo, Yao Shao, Weizhong Department of Computing Hong Kong Polytechnic University Kowloon Hong Kong Key Laboratory of High-Confidence Software Technologies School of Electronics Engineering and Computer Science Peking University Beijing China

ISBN: (纸本)9781457720390

Pervasive computing technologies can benefit the injured, disabled or elderly people in their daily lives, and smart wheelchair has been a representative of this kind of technologies. However, most existing smart wheelchairs have limitations on extensibility and flexibility of building new functionalities. One big reason is they are just stand-alone ones considering other wheelchairs and surrounding things as dummy objects. To address this issue, we proposed an integrated and collaborative approach: Smarter Wheelchairs that can "talk" to each other, and even "talk" to other things in the surrounding. Smarter Wheelchairs take advantages of smart objects deployed in living environment or hospital environment. Smarter Wheelchairs can harness functions provided by smart objects, therefore, their functionality can be flexibly extended. We have implemented and evaluated a prototype system of Smarter Wheelchairs to demonstrate the feasibility and efficiency of our approach. © 2012 IEEE.

关键词： Wheelchairs

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THE ULTRACONVERGENCE OF EIGENVALUES FOR BI-QUADRATIC FINITE ELEMENTS

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Journal of Computational Mathematics 2012年第5期30卷 555-564页

作者： Lingxiong Meng Zhimin Zhang Key Laboratory of High Performance Computing and Stochastic Information Processing(HPCSIP)(Ministry of Education of China) College of Mathematics and Computer ScienceHunan Normal UniversityChangsha 410081China Department of Mathematics Wayne State UniversityDetroitMI 48202USA and Guangdong Province Key Laboratory of Computational ScienceSchool of Mathematics and Computational ScienceSun Yat-sen UniversityGuangzhou 510275China

The classical eigenvalue problem of the second-order elliptic operator is approxlmateo with hi-quadratic finite element in this paper. We construct a new superconvergent function recovery operator, from which the O（h^8｜ in h｜^2） ultraconvergence of eigenvalue approximation is obtained. Numerical experiments verify the theoretical results.

关键词： Finite element method Eigenvalue recovery Ultraconvergence

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Automatic Facet Extraction based on Multidimensional Semantic Index

Automatic Facet Extraction based on Multidimensional Semanti...

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第8届语义知识与网络国际会议(2012 Eighth International Conference on Semanties,Knowledge and Grids )(SKG2012)

作者： Xiao Wei Xiangfeng Luo Qing Li School of Computing Engineering and Science High Performance Computing CenterShanghai University. School of Computing Engineering and Science High Performance Computing CenterShanghai University. City University of Hong Kong Department of Computer Science City University of Hong Kong Hong Kong

Faceted search on webpages needs exact ***,it is difficult to extract facets exactly from webpages because the webpages are unstructured and lack of facet ***,facet extraction is a key to faceted *** paper proposed a method of extracting facets automatically from unstructured webpages to improve the faceted search on *** Multidimensional Semantic Index (MDSI) of webpages is constructed by mining all kinds of semantic relations among the words from webpages,which creates a semantic-rich index for *** MDSI,the differently dimensional semantic indexes are bridged by mining the semantic mapping between *** on the MDSI of webpages,the facets are extracted by analyzing semantic mapping relations in *** validate the effect of the proposed method,two datasets are constructed and the experimental results show that the proposed method is feasible and comparatively precise.

关键词： faceted search multidimensional semantic index semantic mapping facet extraction

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A design assembly framework for FPGA back-end acceleration

A design assembly framework for FPGA back-end acceleration

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International Conference on Reconfigurable computing and FPGAs (ReConFig)

作者： Tannous Frangieh Peter Athanas NSF Center for High-Performance Recongurable Computing (CHREC) Configurable Computing Laboratory Department of Electrical and Computer Engineering Virginia Technology Blacksburg VA USA

Long wait times constitute a bottleneck limiting the number of compilation runs performed in a day, thus risking to restrict FPGA adaptation in modern computing platforms. This work presents an FPGA development paradigm as a means to increase FPGA productivity. The practical tasks of logic partitioning, placement and routing are examined and a resulting assembly framework, qFlow, is implemented. Experiments show up to 7x speed-ups using the proposed paradigm compared to the vendor tool flows.

关键词： Field programmable gate arrays Table lookup Assembly Routing Productivity Hardware Acceleration

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Erratum: Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at = 8 TeV proton-proton collisions using the ATLAS experiment

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Journal of high Energy Physics 2014年第1期2014卷 1-18页

作者： G. Aad T. Abajyan B. Abbott J. Abdallah S. Abdel Khalek O. Abdinov R. Aben B. Abi M. Abolins O. S. AbouZeid H. Abramowicz H. Abreu Y. Abulaiti B. S. Acharya L. Adamczyk D. L. Adams T. N. Addy J. Adelman S. Adomeit T. Adye S. Aefsky T. Agatonovic-Jovin J. A. Aguilar-Saavedra M. Agustoni S. P. Ahlen A. Ahmad M. Ahsan G. Aielli T. P. A. Åkesson G. Akimoto A. V. Akimov M. A. Alam J. Albert S. Albrand M. J. Alconada Verzini M. Aleksa I. N. Aleksandrov F. Alessandria C. Alexa G. Alexander G. Alexandre T. Alexopoulos M. Alhroob M. Aliev G. Alimonti L. Alio J. Alison B. M. M. Allbrooke L. J. Allison P. P. Allport S. E. Allwood-Spiers J. Almond A. Aloisio R. Alon A. Alonso F. Alonso A. Altheimer B. Alvarez Gonzalez M. G. Alviggi K. Amako Y. Amaral Coutinho C. Amelung V. V. Ammosov S. P. Amor Dos Santos A. Amorim S. Amoroso N. Amram C. Anastopoulos L. S. Ancu N. Andari T. Andeen C. F. Anders G. Anders K. J. Anderson A. Andreazza V. Andrei X. S. Anduaga S. Angelidakis P. Anger A. Angerami F. Anghinolfi A. V. Anisenkov N. Anjos A. Annovi A. Antonaki M. Antonelli A. Antonov J. Antos F. Anulli M. Aoki L. Aperio Bella R. Apolle G. Arabidze I. Aracena Y. Arai A. T. H. Arce S. Arfaoui J.-F. Arguin S. Argyropoulos E. Arik M. Arik A. J. Armbruster O. Arnaez V. Arnal O. Arslan A. Artamonov G. Artoni D. Arutinov S. Asai N. Asbah S. Ask B. Åsman L. Asquith K. Assamagan R. Astalos A. Astbury M. Atkinson N. B. Atlay B. Auerbach E. Auge K. Augsten M. Aurousseau G. Avolio D. Axen G. Azuelos Y. Azuma M. A. Baak C. Bacci A. M. Bach H. Bachacou K. Bachas M. Backes M. Backhaus J. Backus Mayes E. Badescu P. Bagiacchi P. Bagnaia Y. Bai D. C. Bailey T. Bain J. T. Baines O. K. Baker S. Baker P. Balek F. Balli E. Banas Sw. Banerjee D. Banfi A. Bangert V. Bansal H. S. Bansil L. Barak S. P. Baranov T. Barber E. L. Barberio D. Barberis M. Barbero D. Y. Bardin T. Barillari M. Barisonzi T. Barklow N. Barlow B. M. Barnett R. M. Barnett A. Baroncelli G. Barone A. J. Barr F. Barreiro J. Barreiro Guimarães da Costa R. Bartoldus A. E. Barton V. Bartsch A. B Fakultät für Mathematik und Physik Albert-Ludwigs-Universität Freiburg Germany Physikalisches Institut University of Bonn Bonn Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma Norman United States of America Institut de Física d’Altes Energies and Departament de Física de la Universitat Autònoma de Barcelona Barcelona Spain LAL Université Paris-Sud and CNRS/IN2P3 Orsay France Institute of Physics Azerbaijan Academy of Sciences Baku Azerbaijan Nikhef National Institute for Subatomic Physics and University of Amsterdam Amsterdam Netherlands Department of Physics Oklahoma State University Stillwater United States of America Department of Physics and Astronomy Michigan State University East Lansing United States of America Department of Physics University of Toronto Toronto Canada Raymond and Beverly Sackler School of Physics and Astronomy Tel Aviv University Tel Aviv Israel DSM/IRFU (Institut de Recherches sur les Lois Fondamentales de l’Univers) CEA Saclay (Commissariat à l’Energie Atomique et aux Energies Alternatives) Gif-sur-Yvette France Department of Physics Stockholm University Stockholm Sweden INFN Gruppo Collegato di Udine Udine Italy Department of Physics King’s College London London United Kingdom AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow Poland Physics Department Brookhaven National Laboratory Upton United States of America Department of Physics Hampton University Hampton United States of America Department of Physics Yale University New Haven United States of America Fakultät für Physik Ludwig-Maximilians-Universität München München Germany Particle Physics Department Rutherford Appleton Laboratory Didcot United Kingdom Department of Physics Brandeis University Waltham United States of America Vinca Institute of Nuclear Sciences University of Belgrade Belgrade Serbia Laboratorio de Instrumentacao e Fisica Experimental de Particulas - LIP Lisboa Portug

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An Immersed Interface Method for the Simulation of Inextensible Interfaces in Viscous Fluids

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Communications in Computational Physics 2012年第3期11卷 925-950页

作者： Zhijun Tan D.V.Le K.M.Lim B.C.Khoo Guangdong Province Key Laboratory of Computational Science&School of Mathematics and Computational Science Sun Yat-senUniversityGuangzhou 510275China Institute of High Performance Computing 1 Fusionopolis Way#16-16 ConnexisSingapore 138632Singapore Singapore-MIT Alliance 4 Engineering Drive 3National University of SingaporeSingapore 117576Singapore Department of Mechanical Engineering National University of Singapore10 Kent Ridge CrescentSingapore 119260Singapore

In this paper,an immersed interface method is presented to simulate the dynamics of inextensible interfaces in an incompressible *** tension is introduced as an augmented variable to satisfy the constraint of interface inextensibility,and the resulting augmented system is solved by the GMRES *** this work,the arclength of the interface is locally and globally conserved as the enclosed region undergoes *** forces at the interface are calculated from the configuration of the interface and the computed augmented variable,and then applied to the fluid through the related jump *** governing equations are discretized on a MAC grid via a second-order finite difference scheme which incorporates jump contributions and solved by the conjugate gradient Uzawa-type *** proposed method is applied to several examples including the deformation of a liquid capsule with inextensible interfaces in a shear *** results reveal that both the area enclosed by interface and arclength of interface are conserved well *** provide further evidence on the capability of the present method to simulate incompressible flows involving inextensible interfaces.

关键词： Inextensible interface Stokes flows singular force immersed interface method CGUzawa method front tracking

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Covariance based fish tracking in real-life underwater environment

Covariance based fish tracking in real-life underwater envir...

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International Conference on computer Vision Theory and Applications, VISAPP 2012

作者： Spampinato, Concetto Palazzo, Simone Giordano, Daniela Kavasidis, Isaak Lin, Fang-Pang Lin, Yun-Te Department of Electrical Electronics and Computer Engineering University of Catania Viale Andrea Doria 6-95125 Catania Italy National Center of High Performance Computing No. 7 R and D 6th Rd. Hsinchu Science Park Hsinchu City Taiwan

ISBN: (纸本)9789898565044

In this paper we present a covariance based tracking algorithm for intelligent video analysis to assist marine biologists in understanding the complex marine ecosystem in the Ken-Ding sub-tropical coral reef in Taiwan by processing underwater real-time videos recorded in open ocean. One of the most important aspects of marine biology research is the investigation of fish trajectories to identify events of interest such as fish preying, mating, schooling, etc. This task, of course, requires a reliable tracking algorithm able to deal with 1) the difficulties of following fish that have multiple degrees of freedom and 2) the possible varying conditions of the underwater environment. To accommodate these needs, we have developed a tracking algorithm that exploits covariance representation to describe the object's appearance and statistical information and also to join different types of features such as location, color intensities, derivatives, etc. The accuracy of the algorithm was evaluated by using hand-labeled ground truth data on 30000 frames belonging to ten different videos, achieving an average performance of about 94%, estimated using multiple ratios that provide indication on how good is a tracking algorithm both globally (e.g. counting objects in a fixed range of time) and locally (e.g. in distinguish occlusions among objects).

关键词： Fish

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