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2012 IEEE 8th World Congress on Services, SErVICES 2012

作者： Tsai, Ying-Lin Huang, Kuo-Chan Chang, Hsi-Ya Ko, Jerry Wang, En Tzu Hsu, Ching-Hsien National Taichung University of Education No. 140 Min-Shen Road Taichung Taiwan National Center for High-Performance Computing Hsinchu Science Park No. 7 R and D 6th Rd. Hsinchu Taiwan Industrial Technology Research Institute No. 195 Sec. 4 Chung Hsing Rd. Chutung Hsinchu Taiwan Chung Hua University No. 707 Sec.2 WuFu Rd. Hsinchu Taiwan

ISBN: (纸本)9780769547565

Most previous workflow scheduling research focused on scheduling a single workflow on parallel systems. recent researches show that utilizing idle time slots between scheduled tasks is a promising direction for efficient multiple workflow scheduling. Stavrinides and Karatza proposed a list scheduling approach to efficient utilization of the idle time slots through bin packing techniques. In this paper, we elaborate on this direction and develop a new approach to further improve multiple workflow scheduling performance through two techniques. The first, in contrast with the list scheduling approach, is clustering the tasks within workflows into groups before allocation. This can reduce inter-task communication cost and thus improve workflow execution performance. The second technique tries to make a balance between tasks' start time and the fitness of idle time slots when allocating task groups. The proposed approach has been evaluated with a series of simulation experiments and compared to the previous method. The results show that our approach outperforms the previous method significantly, up to 51% performance improvement in terms of average makespan. © 2012 IEEE.

关键词： Scheduling

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Text classification based on ensemble extreme learning machine

arXiv

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arXiv 2018年

作者： Li, Ming Xiao, Peilun Zhang, Ju High performance computing application R&D Center Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China University of Chinese Academy of Sciences Beijing100049 China Center for Speech and Language Technology Research Institute of Information Technology Tsinghua University Beijing100084 China College of Science & Engineering University of Edinburgh Edinburgh EH1 United Kingdom

In this paper, we propose a novel approach based on cost-sensitive ensemble weighted extreme learning machine;we call this approach AE1-WELM. We apply this approach to text classification. AE1-WELM is an algorithm including balanced and imbalanced multiclassification for text classification. Weighted ELM assigning the different weights to the different samples improves the classification accuracy to a certain extent, but weighted ELM considers the differences between samples in the different categories only and ignores the differences between samples within the same categories. We measure the importance of the documents by the sample information entropy, and generate cost-sensitive matrix and factor based on the document importance, then embed the cost-sensitive weighted ELM into the AdaBoost.M1 framework seamlessly. Vector space model(VSM) text representation produces the high dimensions and sparse features which increase the burden of ELM. To overcome this problem, we develop a text classification framework combining the word vector and AE1-WELM. The experimental results show that our method provides an accurate, reliable and effective solution for text classification. Copyright © 2018, The Authors. All rights reserved.

关键词： Knowledge acquisition

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The new lattice action and spectrum of the light and medium-mass nuclei 36

The new lattice action and spectrum of the light and medium-...

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36th Annual International Symposium on Lattice Field Theory, LATTICE 2018

作者： Li, Ning Elhatisari, Serdar Epelbaum, Evgeny Lee, dean Lu, Bing-Nan Meißner, Ulf-G. Facility for Rare Isotope Beams Department of Physics and Astronomy Michigan State University MI48824 United States Helmholtz-Institut für Strahlen- und Kernphysik Bethe Center for Theoretical Physics Universität Bonn BonnD-53115 Germany Department of Physics Karamanoglu Mehmetbey University Karaman70100 Turkey Institut für Theoretische Physik II Ruhr-Universität Bochum BochumD-44870 Germany Department of Physics North Carolina State University RaleighNC27695 United States Institute for Advanced Simulation Institut für Kernphysik Jülich Center for Hadron Physics Forschungszentrum Jülich JülichD-52425 Germany JARA - High Performance Computing Forschungszentrum Jülich JülichD-52425 Germany

We present a new lattice formulation of chiral nuclear forces with a simpler decomposition into spin channels. With these interactions the process of fitting to the empirical scattering phase shifts is simplified, and the resulting lattice phase shifts are more accurate than in previous studies. We also present some preliminary results of spectrum of the light and medium-mass nuclei. Our results provide a pathway to ab initio lattice calculations of nuclear structure, reactions, and thermodynamics with accurate and systematic control over the chiral nucleon-nucleon force. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Thermodynamics

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NN interaction and spectrum of the light- and medium-mass nuclei using Lattice EFT 9

NN interaction and spectrum of the light- and medium-mass nu...

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9th International Workshop on Chiral dynamics, Cd 2018

作者： Li, Ning Elhatisari, Serdar Epelbaum, Evgeny Lee, dean Lu, Bing-Nan Meißner, Ulf-G Facility for Rare Isotope Beams Department of Physics and Astronomy Michigan State University MI48824 United States Helmholtz-Institut für Strahlen- und Kernphysik Bethe Center for Theoretical Physics Universität Bonn BonnD-53115 Germany Department of Physics Karamanoglu Mehmetbey University Karaman70100 Turkey Institut für Theoretische Physik II Ruhr-Universität Bochum BochumD-44870 Germany Department of Physics North Carolina State University RaleighNC27695 United States Institute for Advanced Simulation Institut für Kernphysik Jülich Center for Hadron Physics Forschungszentrum Jülich JülichD-52425 Germany JARA - High Performance Computing Forschungszentrum Jülich JülichD-52425 Germany

We present a new lattice formulation of chiral nuclear forces which is much more efficient that the one we used in our previous calculations. We also present some preliminary results of nuclear binding for the light- and medium-mass nuclei. Our results provide a pathway to ab initio lattice calculations of nuclear structure, reactions, and thermodynamics with accurate and systematic control over the chiral nucleon-nucleon force. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Thermodynamics

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Viability of Carbon-Based Life as a Function of the Light Quark Mass

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Physical review Letters 2013年第11期110卷 112502-112502页

作者： Evgeny Epelbaum Hermann Krebs Timo A. Lähde dean Lee Ulf-G. Meißner Institut für Theoretische Physik II Ruhr-Universität Bochum D-44870 Bochum Germany Institut für Kernphysik Institute for Advanced Simulation and Jülich Center for Hadron Physics Forschungszentrum Jülich D-52425 Jülich Germany Department of Physics North Carolina State University Raleigh North Carolina 27695 USA Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universität Bonn D-53115 Bonn Germany JARA—High Performance Computing Forschungszentrum Jülich D-52425 Jülich Germany

The Hoyle state plays a crucial role in the helium burning of stars that have reached the red giant stage. The close proximity of this state to the triple-alpha threshold is needed for the production of carbon, oxygen, and other elements necessary for life. We investigate whether this life-essential condition is robust or delicately fine-tuned by measuring its dependence on the fundamental constants of nature, specifically the light quark mass and the strength of the electromagnetic interaction. We show that there exist strong correlations between the alpha-particle binding energy and the various energies relevant to the triple-alpha process. We derive limits on the variation of these fundamental parameters from the requirement that sufficient amounts of carbon and oxygen be generated in stars. We also discuss the implications of our results for an anthropic view of the Universe.

关键词： rEd giants rESEArCH STArS HELIUM CArBON QUArKS

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Quasi-Parton distribution Function in Lattice Perturbation Theory

arXiv

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arXiv 2017年

作者： Xiong, Xiaonu Luu, Thomas Meißner, Ulf G. Institute for Advanced Simulation Institut für Kernphysik Jülich Center for Hadronphysics Forschungszentrum Jülich JülichD-52428 Germany JARA -High Performance Computing Forschungszentrum Jülich JülichD-52428 Germany Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universität Bonn BonnD-53115 Germany

Large momentum effective field theory provides a new direction for lattice QCd calculations of hadronic structure functions, such as parton distribution functions (PdFs), meson distribution amplitudes, and so on, directly with x-dependence. In the framework of Lattice Perturbation Theory (LPT), we compute the one-loop quark-in-quark quasi-PdF with the naïve fermion action (q~nv) and quasi-PdF with Wilson-Clover action (q~WC) and show that q~nv reduces to the continuum quasi-PdF in the continuum limit. We point out, however, that the continuum limit and massless quark limit do not commute. We find that the condition to recover the same collinear divergence that the quasi-PdF has in continuum QCd is aP32 ≈ m and m P3, while the condition to fully recover the continuum quasi-PdF is aP32 m P3, where P3 is the momentum in the direction of the quark’s motion (longitudinal direction). These two conditions are based on perturbation calculations and should not be applied to non-perturbative calculations because the non-perturbative effects cure the collinear divergence. The correction to the quasi-PdF using the naïve fermion action is due to the Wilson term and can be viewed as an O (a1) correction. For nonzero r, the O (a1) corrections are subsequently mixed with the quasi-PdF using the naïve fermion action. Copyright © 2017, The Authors. All rights reserved.

关键词： Elementary particles

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Structure and rotations of the Hoyle State

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Physical review Letters 2012年第25期109卷 252501-252501页

作者： Evgeny Epelbaum Hermann Krebs Timo A. Lähde dean Lee Ulf-G. Meißner Institut für Theoretische Physik II Ruhr-Universität Bochum D-44870 Bochum Germany Institut für Kernphysik Institute for Advanced Simulation Jülich Center for Hadron Physics Forschungszentrum Jülich D-52425 Jülich Germany Department of Physics North Carolina State University Raleigh North Carolina 27695 USA Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universität Bonn D-53115 Bonn Germany JARA—High Performance Computing Forschungszentrum Jülich D-52425 Jülich Germany

The excited state of the C12 nucleus known as the “Hoyle state” constitutes one of the most interesting, difficult, and timely challenges in nuclear physics, as it plays a key role in the production of carbon via fusion of three alpha particles in red giant stars. In this Letter, we present ab initio lattice calculations which unravel the structure of the Hoyle state, along with evidence for a low-lying spin-2 rotational excitation. For the C12 ground state and the first excited spin-2 state, we find a compact triangular configuration of alpha clusters. For the Hoyle state and the second excited spin-2 state, we find a “bent-arm” or obtuse triangular configuration of alpha clusters. We also calculate the electromagnetic transition rates between the low-lying states of C12.

关键词： EXCITEd state chemistry NUCLEAr research MEASUrEMENT of alpha rays N stars INTErNAL conversion (Nuclear physics) ABSTrACTS

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Parallel direct Simulation Monte Carlo Computation Using CUdA on GPUs

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AIP Conference Proceedings 2011年第1期1333卷 343-347页

作者： C.‐C. Su C.‐W. Hsieh M. r. Smith M. C. Jermy J.‐S. Wu aDepartment of Mechanical Engineering National Chiao Tung University 1001 Ta‐Hsueh Road Hsinchu 30010 Taiwan bNational Center for High‐Performance Computing 7 R&D Road Hsinchu 30076 Taiwan cDepartment of Mechanical Engineering University of Canterbury Private Bag 4800 Christchurch 8140 New Zealand

In this study computations of the two‐dimensional direct Simulation Monte Carlo (dSMC) method using Graphics Processing Units (GPUs) are presented. An all‐device (GPU) computational approach is adopted‐where the entire computation is performed on the GPU device, leaving the CPU idle‐which includes particle moving, indexing, collisions between particles and state sampling. The subsequent application to GPU computation requires various changes to the original dSMC method to ensure efficient performance on the GPU device. Communications between the host (CPU) and device (GPU) occur only during problem initialization and simulation conclusion when results are only copied from the device to the host. Several multi‐dimensional benchmark tests are employed to demonstrate the correctness of the dSMC implementation. We demonstrate here the application of dSMC using a single‐GPU, with speedups of 3∼10 times as compared to a high‐end Intel CPU (Intel Xeon X5472) depending upon the size and the level of rarefaction encountered in the simulation.

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erOSITA clusters dynamical state and their impact on the BCG luminosity

arXiv

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arXiv 2025年

作者： Zenteno, A. Kluge, M. Kharkrang, r. Hernandez-Lang, d. damke, G. Saro, A. Monteiro-Oliveira, r. Carrasco, E.r. Salvato, M. Comparat, J. Fabricius, M. Snigula, J. Arevalo, P. Cuevas, H. Castellon, J.L. Nilo ramirez, A. Astudillo, S. Véliz Landriau, M. Myers, A.d. Schlafly, E. Valdes, F. Weaver, B. Mohr, J.J. Grandis, S. Klein, M. Liu, A. Bulbul, E. Zhang, X. Sanders, J.S. Bahar, Y.E. Ghirardini, V. ramos, M. Balzer, F. Cerro Tololo Inter-American Observatory NSF’s National Optical-Infrared Astronomy Research Laboratory Casilla 603 La Serena Chile Max Planck Institute for Extraterrestrial Physics Giessenbachstrasse 1 Garching85748 Germany Universitè Paris-Saclay CNRS Institut dÁstrophysique Spatiale Orsay91405 France Faculty of Physics Ludwig-Maximilians-Universität München Scheinerstr. 1 Munich81679 Germany INAF - Osservatorio Astronomico di Trieste via G. B. Tiepolo 11 Trieste34143 Italy IFPU - Institute for Fundamental Physics of the Universe Via Beirut 2 Trieste34014 Italy Astronomy Unit Department of Physics University of Trieste via Tiepolo 11 Trieste34131 Italy INFN - National Institute for Nuclear Physics Via Valerio 2 TriesteI-34127 Italy ICSC - Italian Research Center on High Performance Computing Big Data and Quantum Computing Italy Institute of Astronomy and Astrophysics Academia Sinica Taipei10617 Taiwan International Gemini Observatory NSF NOIRLab Casilla 603 La Serena Chile Instituto de Física y Astronomía Universidad de Valparaíso Gran Bretaña 1111 Valparaíso Chile Chile Departamento de Astronomía Universidad de La Serena Av. Raúl Bitrán 1305 La Serena Chile Lawrence Berkeley National Laboratory 1 Cyclotron Road BerkeleyCA94720 United States Department of Physics & Astronomy University of Wyoming 1000 E. University Dept. 3905 LaramieWY82071 United States Space Telescope Science Institute 3700 San Martin Drive BaltimoreMD21218 United States 950 N. Cherry Ave TucsonAZ85732 United States Universität Innsbruck Institut für Astro- und Teilchenphysik Technikerstr. 25/8 Innsbruck6020 Austria

Context. The SrG (Spectrum roentgen Gamma)/erOSITA first public release contains 12,247 clusters and groups from the first 6 months of operation. We use the offset between the Brightest Cluster Galaxy (BCG) and the X–ray peak (dBCG−X) to classify the cluster dynamical state of 3,946 galaxy clusters and groups. Aims. We aim to investigate the evolution of the merger and relaxed cluster distributions with redshift and mass, and their impact on the BCG. Methods. We use the X–ray peak from the erOSITA survey and the BCG position from the dECaLS dr10 optical data, which includes the dECam erOSITA Survey optical data, to measure the dBCG−X offset. We model the distribution of dBCG−X, in units of r500, as the sum of two rayleigh distributions representing the cluster’s relaxed and disturbed populations, and explore their evolution with redshift and mass. To explore the impact of the cluster’s dynamical state on the BCG luminosity, we separate the main sample according to the dynamical state. We define clusters as relaxed if dBCG−X500, disturbed if dBCG−X>0.5r500, and as ‘diverse’ if 0.25BCG−X Copyright © 2025, The Authors. All rights reserved.

关键词： Photons

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Cyberinfrastructure intership and its application to e-science

Cyberinfrastructure intership and its application to e-scien...

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7th IEEE International Conference on eScience, eScience 2011

作者： Abramson, david Arzberger, Peter Wienhausen, Gabriele Galvin, Jim date, Susumu Lin, Fang-Pang Nan, Kai Shimojo, Shinji Faculty of Information Technology Monash University Clayton VIC 3800 Australia University of California MC 0440 9500 Gilman Drive San Diego CA 92093-0440 United States Cybermedia Center Osaka University 5-1 Mihogaoka Ibaraki Osaka 567-0047 Japan National Institute of Information and Communications Technology Otemachi Research Center 1-8-1 Otemachi Chiyoda Tokyo 100-0004 Japan National Center for High Performance Computing Science-based Industrial Park 7 R and D Road VI Hsinchu Taiwan Chinese Academy of Sciences 4 Zhongguancun Nansijie Haidian Beijng 100190 China

ISBN: (纸本)9780769545974

Universities are constantly searching for ways that prepare students as effective global professionals. At the same time, cyber infrastructure leverages computing, information, and communication technology to perform research, often in an international context. In this paper we discuss a novel model, called the Cyber infrastructure Internship Program (CIP), which serves both of these goals. Specifically, students apply or develop cyber infrastructure to solve challenging research problems, but they do this via summer internships abroad. CIP has been implemented at three different Universities: The University of California San diego in the US, Osaka University in Japan and and Monash University in Australia. We discuss details of the schemes and provide some initial evaluations of their success. © 2011 IEEE.

关键词： e-Science

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