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International Conference on high performance computing

作者： Dhananjay Brahme Onkar Bhardwaj Vipin Chaudhary High Performance Computing Center of Excellence Tata Consultancy Services Pune India Department of Electrical Rensselaer Polytechnic Institute Troy NY Department of Computer Science and Engineering SUNY Buffalo New York

This paper presents the underlying theory and the performance of a cluster using a new 2-hop network topology. This topology is constructed using a symmetric equation and Singer Difference Sets and is called SymSig. The degree of connections at each node with SymSig is about half compared to previous methods using Singer Difference Sets. A comparison with a cluster of Clos topology shows significant advantages. The worst case congestion in SymSig topology for unicast permutation is 2, where as in Clos it is proportional to the radix of the building block switches used. The number of switches required is smaller by about 25%, the size of the cluster is larger by about 15% and the worst bandwidth is better by about 50% for SymSig. These advantages are retained for peta and exascale systems. Its performance on a set of collectives like exchange-all, shift-all, broadcast-all and all-to-all send/receive shows improvements ranging from 39% to 83%. Its performance on a molecular dynamics application GROMMACS shows improvement of upto 33%. This network is particularly suitable for applications that require global all to all communications. The low latency of this network makes it scaleable and an attractive alternative for building peta and exascale systems.

关键词： Routing Image color analysis Topology Network topology Ports (computers) Equations Bandwidth

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Study on Fuzzy Semantic Controlling for Machinery and Equipment Manufacturing

Study on Fuzzy Semantic Controlling for Machinery and Equipm...

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2013 2nd International Conference on Manufacture engineering,Quality and Production System(ICMEQP 2013)

作者： Heng Sun Shubin Cai Richard Happson Joseph Massawe Ling Chen Department of Computer Science Jinan University Software Engineering Department Shenzhen University Shenzhen Key Laboratory of High Performance Data Mining International School Jinan University Library Jinan University

Machinery and equipment descriptions play an important role in the design and manufacturing of industrial machinery devices and help reducing the design time and manufacturing costs of machinery devices. However, one of the main obstacles to realize efficient device design and manufacturing is the lack of effective semantic description method because of the surprisingly increasing volume and semantically fuzzy natures of the industrial device descriptions. To overcome this problem, this paper presents a novel fuzzy ontology-based device description method and implements the intelligent device retrieval and representation system based on the fuzzy ontology. The fuzzy inference and semantic fusion mechanisms of this approach are demonstrated.

关键词： Machinery and equipment manufacturing Fuzzy ontology Device description

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An implementation of a multi-site virtual cluster cloud

An implementation of a multi-site virtual cluster cloud

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International Joint Conference on computer science and Software engineering (JCSSE)

作者： Pongsakorn U-chupala Putchong Uthayopas Kohei Ichikawa Susumu Date Hirotake Abe High Performance Computing and Networking Center Department of Computer Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Software Design & Analysis Laboratory Graduate School of Information Science NAIST Nara Japan Cybermedia Center Osaka University Osaka Japan Division of Information Science Graduate School of Systems and Information Engineering University of Tsukuba Ibaragi Japan

ISBN: (纸本)9781479908059

The use of virtual cluster for high performance computing (HPC) work has a great benefit of hiding the complexity of physical infrastructure while providing a familiar HPC environment for users. Nevertheless, setting up one is still a challenging task for most users. In addition, the ability to span a virtual cluster across a multi-site cloud can even create a great potential for users to harness a much higher processing power from the cloud. In this paper, the development of a multi-site virtual cluster cloud is presented. This is done by providing the cloud infrastructures tailored specifically for virtual cluster deployment along with related utilities such as web-interface monitor and command line tools. To realize this infrastructure, an overlay network is created using Virtual Private Network (VPN) technology to merge every site into a single broadcast domain. Moreover, a Multi-tier VPN network topology is proposed to enhance the communication performance among the multi-site cloud. A smart virtual machine scheduling mechanism is introduced to reduce performance degradation caused by network delays. The experimental results show that the virtual cluster works well with highly parallel task with low communication among task. Thus, this technology can be used to support many classes of important HPC applications.

关键词： Virtual private networks Overlay networks Virtual machining Servers Rocks Cloud computing Bandwidth

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Recent advances on apposition compound eye cameras

Recent advances on apposition compound eye cameras

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CLEO: Applications and Technology, CLEO_AT 2013

作者： Song, Y.M. Xie, Y. Malyarchuk, V. Xiao, J. Jung, I. Choi, K.-J. Liu, Z. Park, H. Lu, C. Kim, R.-H. Li, R. Crozier, K.B. Huang, Y. Rogers, J.A. Department of Materials Science and Engineering Beckman Institute for Advanced Science and Technology Frederick Seitz Materials Research Laboratory and University of Illinois at Urbana-Champaign Urbana IL 61801 United States Department of Mechanical Engineering University of Colorado at Boulder Boulder CO 80309 United States Department of Mechanical Engineering Kyung Hee University Yongin-si Gyeonggi-do 446-701 Korea Republic of Department of Chemistry University of Illinois at Urbana-Champaign Urbana IL 61801 United States Institute of High Performance Computing A star 1 Fusionopolis Way #16-16 Connexis 138632 Singapore School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 United States Department of Civil Engineering and Soft Matter Research Center Zhejiang University Hangzhou 310058 China State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Department of Mechanical Engineering Northwestern University Evanston IL 60208 United States

This work presents digital cameras that resemble, both structurally and functionally, apposition-type compound eyes of daylight insect. Hemispherical imagers with 180 artificial ommatidia yield 160 degree field of vie... 详细信息

ISBN: (纸本)9781557529725

关键词： Fiber optics

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Neural networks approach for solving the Maximal Constraint Satisfaction Problems

Neural networks approach for solving the Maximal Constraint ...

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International Conference on Intelligent Systems: Theories and Applications

作者： Mohamed ETTAOUIL khalid HADDOUCH Youssef HAMI. LOQMAN Chakir Scientific Computing and Computer sciences Engineering sciences Modeling and Scientific Computing Laboratory Faculty of Science and Technology of Fez University Sidi Mohammed ben Abdellah Box 2202 Fez Morocco Department of Computer Engineering High School of technology Moulay Isma?l University B. P. 3103 50000 Toulal Meknes Morocco.

ISBN: (纸本)9781479902972

In this paper, we propose a new approach to solve the maximal constraint satisfaction problems (Max-CSP) using the continuous Hopfield network. This approach is divided into two steps: the first step involves modeling the maximal constraint satisfaction problem as 0-1 quadratic programming subject to linear constraints (QP). The second step concerns applying the continuous Hopfield network (CHN) to solve the QP problem. Therefore, the generalized energy function associated to the CHN and an appropriate parameter-setting procedure about Max-CSP problems are given in detail. Finally, the proposed algorithm and some computational experiments solving the Max-CSP are shown.

关键词： component Maximal constraint satisfaction problems quadratic 0-1 programming continuous Hopfield network energy function

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Novel SNP improves differential survivability and mortality in non-small cell lung cancer patients

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BMC Genomics 2014年第9期15卷 S20-S20页

作者： Mah, Tzia Liang Yap, Xin Ning Adeline Limviphuvadh, Vachiranee Li, Nanpu Sridharan, Srinath Kuralmani, Vellaisemy Feng, Mengling Liem, Natalia Adhikari, Sharmila Yong, Wei Peng Soo, Ross A Maurer-Stroh, Sebastian Eisenhaber, Frank Tong, Joo Chuan Institute for Infocomm Research Data Analytics Department 1 Fusionopolis Way #21-01 Connexis South Tower Singapore 138632 Singapore National University Health System Department of Haematology-Oncology 5 Lower Kent Ridge Road Singapore 119074 Singapore Bioinformatics Institute 30 Biopolis Street #07-01 Matrix Singapore 138671 Singapore Nanyang Technological University (NTU) School of Biological Sciences (SBS) 60 Nanyang Drive 637551 Singapore Nanyang Technological University (NTU) School of Computer Engineering (SCE) 50 Nanyang Drive 637553 Singapore National University of Singapore (NUS) Department of Biological Sciences (DBS) 8 Medical Drive 4 117597 Singapore National University of Singapore Department of Biochemistry Yong Loo Lin School of Medicine Singapore 117597 Singapore Institute of High Performance Computing 1 Fusionopolis Way #16-16 Connexis 138632 Singapore National University of Singapore Cancer Science Institute of Singapore Singapore

Background: Non-small cell lung cancer (NSCLC) is a major cause of cancer-related death worldwide due to poor patient prognosis and clinical outcome. Here, we studied the genetic variations underlying NSCLC pathogenesis based on their association to patient outcome after gemcitabine therapy. Results: Bioinformatics analysis was used to investigate possible effects of POLA2 G583R (POLA2+1747 GG/GA, dbSNP ID: rs487989) in terms of protein function. Using biostatistics, POLA2+1747 GG/GA (rs487989, POLA2 G583R) was identified as strongly associated with mortality rate and survival time among NSCLC patients. It was also shown that POLA2+1747 GG/GA is functionally significant for protein localization via green fluorescent protein (GFP)-tagging and confocal laser scanning microscopy analysis. The single nucleotide polymorphism (SNP) causes DNA polymerase alpha subunit B to localize in the cytoplasm instead of the nucleus. This inhibits DNA replication in cancer cells and confers a protective effect in individuals with this SNP. Conclusions: The results suggest that POLA2+1747 GG/GA may be used as a prognostic biomarker of patient outcome in NSCLC pathogenesis. © 2014 Mah et al.;licensee BioMed Central Ltd.

关键词： Biomarker Genetic variant Mortality Non-small cell lung cancer Survival Outcome

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Parseval Frame Wavelet Multipliers in L^2(R^d)

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Chinese Annals of Mathematics,Series B 2012年第6期33卷 949-960页

作者： Zhongyan LI Xianliang SHI College of Mathematics and Computer Science Key Laboratory of High Performance Computing and Stochastic Information Processing(HPCSIP)Ministry of Education of ChinaHunan Normal Univer-sity Department of Mathematics and Physics North China Electric PowerUniversity

Let A be a d x d real expansive matrix. An A-dilation Parseval frame wavelet is a function φ E n2 （Rd）, such that the set {｜det A｜n/2φ（Ant -l）：n ∈ Z, l∈ Zd} forms a Parseval frame for L2 （Rd）. A measurable function f is called an A-dilation Parseval frame wavelet multiplier if the inverse Fourier transform of fφ is an A-dilation Parseval frame wavelet whenever φ is an A-dilation Parseval frame wavelet, where φ denotes the Fourier transform of φ. In this paper, the authors completely characterize all A-dilation Parseval frame wavelet multipliers for any integral expansive matrix A with ｜ det（A）｜= 2. As an application, the path-connectivity of the set of all A-dilation Parseval frame wavelets with a frame MRA in L2（Rd） is discussed.

关键词： Parseval frame wavelet Wavelet multiplier Frame multiresolutionanalysis

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A scalable inline cluster deduplication framework for big data protection

A scalable inline cluster deduplication framework for big da...

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13th ACM/IFIP/USENIX International Middleware Conference, Middleware 2012

作者： Fu, Yinjin Jiang, Hong Xiao, Nong State Key Laboratory of High Performance Computing National University of Defense Technology China Department of Computer Science and Engineering University of Nebraska-Lincoln United States

ISBN: (纸本)9783642351693

Cluster deduplication has become a widely deployed technology in data protection services for Big Data to satisfy the requirements of service level agreement (SLA). However, it remains a great challenge for cluster deduplication to strike a sensible tradeoff between the conflicting goals of scalable deduplication throughput and high duplicate elimination ratio in cluster systems with low-end individual secondary storage nodes. We propose ?-Dedupe, a scalable inline cluster deduplication framework, as a middleware deployable in cloud data centers, to meet this challenge by exploiting data similarity and locality to optimize cluster deduplication in inter-node and intra-node scenarios, respectively. Governed by a similarity-based stateful data routing scheme, ?-Dedupe assigns similar data to the same backup server at the super-chunk granularity using a handprinting technique to maintain high cluster-deduplication efficiency without cross-node deduplication, and balances the workload of servers from backup clients. Meanwhile, ?-Dedupe builds a similarity index over the traditional locality-preserved caching design to alleviate the chunk index-lookup bottleneck in each node. Extensive evaluation of our ?-Dedupe prototype against state-of-the-art schemes, driven by real-world datasets, demonstrates that -Dedupe achieves a cluster-wide duplicate elimination ratio almost as high as the high-overhead and poorly scalable traditional stateful routing scheme but at an overhead only slightly higher than that of the scalable but low duplicate-elimination-ratio stateless routing approaches. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Big data

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Manipulating Ferroelectric Domains in Nanostructures Under Electron Beams

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Physical Review Letters 2013年第16期111卷 165702-165702页

作者： R. Ahluwalia N. Ng A. Schilling R. G. P. McQuaid D. M. Evans J. M. Gregg D. J. Srolovitz J. F. Scott Institute of High Performance Computing Singapore 138632 Singapore School of Mathematics and Physics Queen’s University Belfast Belfast BT7 1NN United Kingdom Departments of Materials Science and Engineering Mechanical Engineering and Applied Mechanics University of Pennsylvania Philadelphia Pennsylvania 19104 USA Department of Physics Cavendish Laboratory J. J. Thompson Avenue Cambridge CB3 0HE United Kingdom

Freestanding BaTiO3 nanodots exhibit domain structures characterized by distinct quadrants of ferroelastic 90° domains in transmission electron microscopy (TEM) observations. These differ significantly from flux-closure domain patterns in the same systems imaged by piezoresponse force microscopy. Based upon a series of phase field simulations of BaTiO3 nanodots, we suggest that the TEM patterns result from a radial electric field arising from electron beam charging of the nanodot. For sufficiently large charging, this converts flux-closure domain patterns to quadrant patterns with radial net polarizations. Not only does this explain the puzzling patterns that have been observed in TEM studies of ferroelectric nanodots, but also suggests how to manipulate ferroelectric domain patterns via electron beams.

关键词： FERROELECTRIC domains FERROELECTRIC materials DOMAIN structure PARTICLES (Nuclear physics) ELECTRON beams PARTICLE beams

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On Parseval super-frame wavelets

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Applied Mathematics(A Journal of Chinese Universities) 2012年第2期27卷 192-204页

作者： LI Zhong-yan SHI Xian-liang College of Mathematics and Computer Science Key Laboratory of High Performance Computing and Stochastic Information Processing(HPCSIP)(Ministry of Education of China)Hunan Normal UniversityChangsha 410081China Department of Mathematics and Physics North China Electric Power UniversityBeijing 102206China

Suppose that η1,...,η_n are measurable functions in L2（R）.We call the n-tuple（η1,...,ηn） a Parseval super frame wavelet of length n if {2^（k/2） η1（2~kt-l） ⊕···⊕2^（k/2） ηn（2kt-l）：k,l∈Z} is a Parseval frame for L2（R）⊕*** high dimensional case,there exists a similar notion of Parseval super frame wavelet with some expansive dilation *** this paper,we will study the Parseval super frame wavelets of length n,and will focus on the path-connectedness of the set of all s-elementary Parseval super frame wavelets in one-dimensional and high dimensional *** will prove the corresponding path-connectedness theorems.

关键词： Parseval frame wavelet super frame s-elementary Parseval super frame wavelet.

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