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2005 IEEE Antennas and Propagation Society International Symposium and USNC/URSI Meeting

作者： Feng, Zhuo Li, Le-Wei Li, Er-Ping Yeo, Tat Soon Department of Electrical and Computer Engineering National University of Singapore Kent Ridge Singapore 119260 Singapore Computational Electronics and Electromagnetics Division Institute of High Performance Computing Science Park II Singapore 117528 Singapore

ISBN: (纸本)0780388836

In this paper, a new technique is proposed to analyse the mutual admittance between the slots of the radial line slot antennas (RLSA). No Green's functions are required since the mutual and self admittance of the slot is obtained by computing the mutual impedance between the dipoles and their images due to the parallel plates. The numbers of the images to be computed for a desired accuracy are discussed while the mutual admittance of several kinds of slot arrangements are displayed. © 2005 IEEE.

关键词： Slot antennas

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SOCA-DOM:A Mobile System-on-Chip Array System for Analyzing Big Data on the Move

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Journal of computer science & Technology 2022年第6期37卷 1271-1289页

作者： Le-Le Li Jiang-Yi Liu Jian-Ping Fan Xue-Hai Qian Kai Hwang Yeh-Ching Chung Zhi-Bin Yu Center for Heterogeneous and Intelligent Computing Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhen 518172China Center for High Performance Computing Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences Shenzhen 518055China Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos Angeles CA 90089-0001U.S.A. Department of Computer Science University of Southern CaliforniaLos AngelesCA 90089-0001U.S.A. School of Data and Science The Chinese University of Hong KongShenzhenShenzhen 518172China

Recently,analyzing big data on the move is *** requires that the hardware resource should be low volume,low power,light in weight,high-performance,and highly scalable whereas the management software should be flexible and consume little hardware *** meet these requirements,we present a system named SOCA-DOM that encompasses a mobile system-on-chip array architecture and a two-tier“software-defined”resource manager named ***,we design an Ethernet communication board to support an array of mobile ***,we propose a two-tier software architecture for Chameleon to make it ***,we devise data,configuration,and control planes for Chameleon to make it“software-defined”and in turn consume hardware resources on ***,we design an accurate synthetic metric that represents the computational power of a computing *** employ 12 Apache Spark benchmarks to evaluate ***,SOCA-DOM consumes up to 9.4x less CPU resources and 13.5x less memory than Mesos which is an existing resource *** addition,we show that a 16-node SOCA-DOM consumes up to 4x less energy than two standard Xeon *** on the results,we conclude that an array architecture with fine-grained hardware resources and a software-defined resource manager works well for analyzing big data on the move.

关键词： edge computing mobile architecture resource management big data analytics software-defined systems

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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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Efficient minus and signed domination in graphs 11th

Efficient minus and signed domination in graphs

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11th Annual International Symposium on Algorithms and Computation, ISAAC 2000

作者： Lu, Chin Lung Peng, Sheng-Lung Tang, Chuan Yi National Center for High-Performance Computing P.O. Box 19-136 Hsinchu300 Taiwan Department of Computer Science and Information Engineering National Dong Hwa University Hualien Taiwan Department of Computer Science National Tsing Hua University Hsinchu300 Taiwan

ISBN: (纸本)3540412557

We show that the efficient minus (resp., signed) domination problem is NP-complete for chordal graphs, chordal bipartite graphs, planar bipartite graphs and planar graphs of maximum degree 4 (resp., for chordal graphs). Based on the forcing property on blocks of vertices and automata theory, we provide a uniform approach to show that in a special class of interval graphs, every graph (resp., every graph with no vertex of odd degree) has an efficient minus (resp., signed) dominating function. Besides, we show that the efficient minus domination problem is equivalent to the efficient domination problem on trees. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Graph theory

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Measuring the effect of intervening early for academically at risk students in a CS1 course

Measuring the effect of intervening early for academically a...

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2010 ASEE Annual Conference and Exposition

作者： Punch, William Enbody, Richard McDonough, Colleen Sticklen, Jon Department of Computer Science Michigan State's High Performance Computing Center Michigan State University United States Department of Computer Science and Engineering Michigan State University United States College of Engineering Michigan State University United States Center for Engineering Education Research Michigan State University United States

We recently converted a CS1 (Introduction to computing) class to use the Python language in place of C++. Among other reasons, we hoped that the new language would help students who typically struggled with the course. Our typical drop+fail rate was around 25%-30% for C++, and we hoped the conversion would reduce this number. Though it did reduce slightly, 15%-25%, it was not as significant as we had hoped. We therefore tried an early intervention strategy to help those students whom we could identify as struggling. We provided extra tutoring for only those students. We then calculated statistics on the effects this extra tutoring. The results were not good: we found no significant difference between the group of students who used the tutoring and those that did not. We review some of the potential reasons for this result. © American Society for engineering Education, 2010.

关键词： Students

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Rapid prototyping techniques for fuzzy controllers 5th

Rapid prototyping techniques for fuzzy controllers

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5th Asian computing science Conference on Advances in computing science, ASIAN 1999

作者： Chantrapornchai, Chantana Tongsima, Sissades Sha, Edwin Silpakorn University Nakorn Pathom7300 Thailand National Electronics and Computer Technology Center High Performance Computing Laboratory Bangkok10400 Thailand Department of Computer Science and Engineering University of Notre Dame Notre DameIN46556 United States

ISBN: (纸本)354066856X

In this paper, a new framework for rapid system design and implementation for fuzzy systems is proposed. The given system specification is separated into two components: A conceptual specification and a parameter specification. The conceptual specification defines the system core, which is rarely changed during the system adjustment and may be implemented in hardware at an early stage of the design process. The parameter specification defines parameters that are often changed and are implemented in software for easy adjustment. Such a partitioning ap- proach integrates both hardware and software capability. The presented methodology gives a rapid prototyping and efficient system tuning process which, therefore, can reduce the development cycle time and increase flexibility when designing fuzzy systems. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Rapid prototyping

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A survey on hardware-aware and heterogeneous computing on multicore processors and accelerators

A survey on hardware-aware and heterogeneous computing on mu...

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作者： Buchty, Rainer Heuveline, Vincent Karl, Wolfgang Weiss, Jan-Philipp Institute of Computer Science and Engineering Karlsruhe Institute of Technology Karlsruhe Germany Engineering Mathematics and Computing Lab. Institute for Applied and Numerical Mathematics Karlsruhe Institute of Technology Karlsruhe Germany Shared Research Group New Frontiers in High Performance Computing Karlsruhe Institute of Technology Karlsruhe Germany

In the last few years, the landscape of parallel computing has been subject to profound and highly dynamic changes. The paradigm shift towards multicore and manycore technologies coupled with accelerators in a heterogeneous environment is offering a great potential of computing power for scientific and industrial applications. However, for one to take full advantage of these new technologies, holistic approaches coupling the expertise ranging from hardware architecture and software design to numerical algorithms are a pressing necessity. Parallel computing is no longer limited to supercomputers and is now much more diversified - with a multitude of technologies, architectures, and programming approaches leading to increased complexity for developers and engineers. In this work, we give - from the perspective of numerical simulation and applications - an overview of existing and emerging multicore and manycore technologies as well as accelerator concepts. We emphasize the challenges associated with high-performance heterogeneous computing and discuss the interfaces needed to fill the gap between the hardware architecture and the implementation of efficient numerical algorithms. By means of this short survey - which stresses the necessity of hardware-aware computing - we aim at giving assistance to users in scientific computing entering this fascinating field and help understanding associated issues and capabilities. Copyright © 2011 John Wiley & Sons, Ltd.

关键词： Parallel programming

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Parallel erasure coding: Exploring task parallelism in erasure coding for enhanced bandwidth and energy efficiency 11

Parallel erasure coding: Exploring task parallelism in erasu...

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11th IEEE International Conference on Networking Architecture and Storage, NAS 2016

作者： Chen, Hsing-Bung Fu, Song High Performance Computing-Design Group Los Alamos National Laboratory Los AlamosNM87545 United States Department of Computer Science and Engineering University of North Texas DentonTX76203 United States

ISBN: (纸本)9781509033157

Very large data sets within the range of megabytes to terabytes generated daily from checkpoint-and- restart processes are seen in today's scientific simulations. Reliability and durability are two important factors to build an archive storage system. Erasure code based object storage systems are becoming popular choices for archive storage systems due to cost-effective storage space saving schemes and higher fault-resilience capabilities. Both erasure code encoding and decoding procedures involve heavy array, matrix, and table-lookup compute intensive operations. Current solutions of the erasure coding process are based on single process approach which is not capable of processing very large data sets efficient and effectively. In this paper, we address the bottleneck problem of single process erasure encoding by leveraging task parallelism offered by multi-core computers. We add parallel processing capability to the erasure coding process. More specifically, we develop a parallel erasure coding software, called parEC. It explores the MPI run time parallel I/O environment and integrates data placement process for distributing encoded data blocks to destination storage devices. We evaluate the performance of parEC in terms of both encoding throughput and energy efficiency. We also compare the performance of two task scheduling algorithms for parEC. Our experimental results show parEC can significantly reduce the encoding time (i.e., by 74.06%-96.86%) and energy consumption (i.e., by 73.57%-96.86%), and Demand-based Workload Assignment (DBWA) algorithm can a high system utilization (i.e., 95.23%). © 2016 IEEE.

关键词： Energy efficiency

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Optical microring resonators in lithium niobate for classical and quantum microwave photonics

Optical microring resonators in lithium niobate for classica...

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2013 International Conference on Optical MEMS and Nanophotonics, OMN 2013

作者： Jun, Deng Hussian, Sajid Saha, Soham Png, Ching Eng Tsang, Mankei Danner, Aaron J. Department of Electrical and Computer Engineering National University of Singapore Singapore 117576 Singapore Institute of High Performance Computing Agency for Science Technology and Research 1 Fusionopolis Way #16-16 Connexis Singapore 138632 Singapore

ISBN: (纸本)9781479915125

A microring resonator was fabricated in LiNbO3 substrate by annealed proton exchange (APE) method. Measurement results show that thermal annealing is necessary to improve the performance of the channel waveguides. The measured extinction ratio is approximately 13dB. By making use of Cr film as electrodes, a tunability of 2 pm/V is obtained by applying 150V. © 2013 IEEE.

关键词： Niobium compounds

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Communication–Free Parallel Mesh Multiplication for Large Scale Simulations 13th

Communication–Free Parallel Mesh Multiplication for Large S...

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13th International Conference on high performance computing in Computational science, VECPAR 2018

作者： Silva, Rômulo M. Lima, Benaia S. J. Camata, José J. Elias, Renato N. Coutinho, Alvaro L. G. A. High Performance Computing Center and Civil Engineering Department COPPE/Federal University of Rio de Janeiro Rio de Janeiro Brazil Department of Computer Science Federal University of Juiz de Fora Juiz de Fora Brazil

ISBN: (纸本)9783030159955

Often unstructured grid methods, such as finite elements, are used in high fidelity simulations. In these methods, solution accuracy is associated to the interpolation order and to the grid size. Unstructured parallel mesh refinement is computationally expensive due to subdomains interface communication. In the present work we develop a uniform edge-based parallel tetrahedral mesh refinement scheme completely free of communication, fast, simple to implement and highly scalable. This is achieved by an index generation for subdomain interface grid points based on special pairing functions. © 2019, Springer Nature Switzerland AG.

关键词： Mesh generation

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