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A high order composite scheme for the second order elliptic problem with nonlocal boundary and its fast algorithm

Applied mathematics and Computation 2014年 227卷 212-221页

作者： Cunyun Nie Shi Shu Haiyuan Yu Qianjiang An Department of Mathematics and Physics The Hunan Institution of Engineering Xiangtan City Hunan 411104 China Hunan Key Laboratory for Computation & Simulation in Science and Engineering Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education Xiangtan University Hunan 411105 China Department of Mathematics The Institute of Tongren Guizhou 554300 China

The elliptic problem with nonlocal boundary condition is widely applied in the field of science and engineering. Firstly, we construct a linear finite element scheme for the nonlocal boundary problem, and derive the optimal L 2 error estimate. Then, based on the quadratic finite element and the extrapolation linear finite element methods, we present a composite scheme, and prove that it is convergent order three. Furthermore, we design an upper triangular preconditioning algorithm for the linear finite element discrete system. Finally, numerical results not only validate that the new algorithm is efficient, but also show that the new scheme is convergent order three, furthermore order four on uniform grids.

关键词： The elliptic problem with nonlocal boundary condition The finite element method An upper triangular preconditioner Algebraic multigrid method

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Parallel Bayesian Network Structure Learning for Genome-Scale Gene Networks

Parallel Bayesian Network Structure Learning for Genome-Scal...

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Supercomputing Conference

作者： Sanchit Misra Md. Vasimuddin Kiran Pamnany Sriram P. Chockalingam Yong Dong Min Xie Maneesha R. Aluru Srinivas Aluru Parallel Computing Lab Intel Corporation Bangalore India Dept. of Computer Science and Engineering Indian Institute of Technology Bombay Mumbai India State Key Laboratory of High Performance Computing National University of Defense Technology Changsha China School of Biology Georgia Institute of Technology Atlanta USA School of Computational Science and Engineering Georgia Institute of Technology Atlanta USA

Learning Bayesian networks is NP-hard. Even with recent progress in heuristic and parallel algorithms, modeling capabilities still fall short of the scale of the problems encountered. In this paper, we present a massively parallel method for Bayesian network structure learning, and demonstrate its capability by constructing genome-scale gene networks of the model plant Arabidopsis thaliana from over 168.5 million gene expression values. We report strong scaling efficiency of 75% and demonstrate scaling to 1.57 million cores of the Tianhe-2 supercomputer. Our results constitute three and five orders of magnitude increase over previously published results in the scale of data analyzed and computations performed, respectively. We achieve this through algorithmic innovations, using efficient techniques to distribute work across all compute nodes, all available processors and coprocessors on each node, all available threads on each processor and coprocessor, and vectorization techniques to maximize single thread performance.

关键词： Bayes methods Hypercubes Instruction sets Genomics Bioinformatics Coprocessors Vectors

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Predicting technology adoption in people with dementia;initial results from the TAUT project

Predicting technology adoption in people with dementia;initi...

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6th International Work-Conference on Ambient Assisted Living, IWAAL 2014

作者： Cleland, Ian Nugent, Chris D. McClean, Sally I. Hartin, Phillip J. Sanders, Chelsea Donnelly, Mark Zhang, Shuai Scotney, Bryan Smith, Ken Norton, Maria C. Tschanz, JoAnn T. Computer Science Research Institute and School of Computing and Mathematics University of Ulster Newtownabbey Co. AntrimBT37 0QB United Kingdom Computer Science Research Institute and School of Computing and Information Engineering University of Ulster ColeraineBT52 1SA United Kingdom Department of Phycology Utah State University LoganUT84322-4440 United States Population Sciences Huntsman Cancer Institute University of Utah Salt Lake CityUT84112 United States

ISBN: (纸本)9783319131047

The acceptance of technology is a crucial factor in successfully deploying technology solutions in healthcare. Our previous research has highlighted the potential of modelling user adoption from a range of environmental, social and physical parameters. This current work aims to build on the notion of predicting technology adoption through a study investigating the usage of a reminding application deployed through a mobile phone. The TAUT project is currently recruiting participants from the Cache County Study on Memory in Aging (CCSMA) and will monitor participants over a period of 12 months. Information relating to participants’ compliance with usage of the reminding application, details of cognitive assessments from the CCSMA and medical and genealogical related details from the Utah Population Database (UPDB) will be used as inputs to the development of a new adoption model. Initial results show, that with an unscreened dataset, it is possible to predict refusers and adopters with an F-measure of 0.79. © Springer International Publishing Switzerland 2014.

关键词： Forecasting

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Lifetime measurement of neutron-rich even-even molybdenum isotopes

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Physical Review C 2017年第3期95卷 034320-034320页

作者： D. Ralet S. Pietri T. Rodríguez M. Alaqeel T. Alexander N. Alkhomashi F. Ameil T. Arici A. Ataç R. Avigo T. Bäck D. Bazzacco B. Birkenbach P. Boutachkov B. Bruyneel A. M. Bruce F. Camera B. Cederwall S. Ceruti E. Clément M. L. Cortés D. Curien G. De Angelis P. Désesquelles M. Dewald F. Didierjean C. Domingo-Pardo M. Doncel G. Duchêne J. Eberth A. Gadea J. Gerl F. Ghazi Moradi H. Geissel T. Goigoux N. Goel P. Golubev V. González M. Górska A. Gottardo E. Gregor G. Guastalla A. Givechev T. Habermann M. Hackstein L. Harkness-Brennan G. Henning H. Hess T. Hüyük J. Jolie D. S. Judson A. Jungclaus R. Knoebel I. Kojouharov A. Korichi W. Korten N. Kurz M. Labiche N. Lalović C. Louchart-Henning D. Mengoni E. Merchán B. Million A. I. Morales D. Napoli F. Naqvi J. Nyberg N. Pietralla Zs. Podolyák A. Pullia A. Prochazka B. Quintana G. Rainovski M. Reese F. Recchia P. Reiter D. Rudolph M. D. Salsac E. Sanchis L. G. Sarmiento H. Schaffner C. Scheidenberger L. Sengele B. S. Nara Singh P. P. Singh C. Stahl O. Stezowski P. Thoele J. J. Valiente Dobon H. Weick A. Wendt O. Wieland J. S. Winfield H. J. Wollersheim M. Zielinska Institut für Kernphysik Technisch Universität Darmstadt D-64289 Darmstadt Germany Helmholtzzentrum für Schwerionenforschung GmbH (GSI) D-64291 Darmstadt Germany CSNSM Univ. Paris-Sud CNRS/IN2P3 Universitié Paris-Saclay F-91405 Orsay France Departamento de Francesica Teorica Universidad Autonoma de Madrid E-28049 Madrid Spain Department of Physics College of Sciences Al Imam Mohammad Ibn Saud Islamic University (IMSIU) P.O. Box 90950 Riyadh 11623 Saudi Arabia Department of Physics University of Surrey Guidford GU-27XH United Kingdom King Abdulaziz City for Science and Technology (KACST) P.O. Box 6086 Riyadh 11442 Saudi Arabia Justus-Liebig-Universität Giessen D-35392 Giessen Germany Department of Physics Royal Institute of Technology (KTH) SE-10691 Stockholm Sweden Department of Physics Faculty of Science Ankara University TR-06100 Tandoğan Ankara Turkey Istituto Nazionale di Fisica Nucleare Sezione di Milano IT-20133 Milano Italy Istituto Nazionale di Fisica Nucleare Sezione di Padova IT-35131 Padova Italy Institut für Kernphysik Universität zu Köln D-50937 Köln Germany Institut de Recherche sur les lois Fondamentales de l'Univers IRFU CEA/DSM Centre CEA de Saclay F-91191 Gif-sur-Yvette Cedex France School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Grand Accélérateur National d'Ions Lourds GANIL CEA/DSAM and CNRS/IN2P3 BP 55027 F-14076 CAEN Cedex 05 France IPHC/CNRS-University of Strasbourg F-67037 Strasbourg France Instituto de Física Corpuscular CSIC-Universidad de Valencia E-46071 Valencia Spain Department of Physics Lund University SE-22100 Lund Sweden Departamento de Ingeniera Electrónica Universitat de Valencia Burjassot E-46100 Valencia Spain Oliver Lodge Laboratory The University of Liverpool Liverpool L69 7ZE United Kingdom Instituto de Estructura de la Materia CSIC Madrid E-28006 Madrid Spain Institut de Recherche sur les lois Fondamentales de l'Univers (IRFU) CEA/DSM Centre

Background: In the neutron-rich A≈100 mass region, rapid shape changes as a function of nucleon number as well as coexistence of prolate, oblate, and triaxial shapes are predicted by various theoretical models. Lifetime measurements of excited levels in the molybdenum isotopes allow the determination of transitional quadrupole moments, which in turn provides structural information regarding the predicted shape change.

关键词： Collective levels Electromagnetic transitions Lifetimes & widths Nuclear structure & decays 90 ≤ A ≤ 149

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First observation of γ rays emitted from excited states south-east of Sn132: The πg9/2−1⊗νf7/2 multiplet of In83132

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Physical Review C 2016年第4期93卷 041301(R)-041301(R)页

作者： A. Jungclaus A. Gargano H. Grawe J. Taprogge S. Nishimura P. Doornenbal G. Lorusso Y. Shimizu G. S. Simpson P.-A. Söderström T. Sumikama Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga S. Bönig L. Coraggio J.-M. Daugas F. Drouet A. Gadea S. Ilieva N. Itaco T. Kröll A. Montaner-Pizá K. Moschner D. Mücher H. Nishibata A. Odahara R. Orlandi A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4JG United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany CEA DAM DIF 91297 Arpajon cedex France Instituto de Física Corpuscular CSIC-Univ. of Valencia E-46980 Paterna Spain Seconda Universit di Napoli Dipartimento di Matematica e Fisic

For the first time, the γ decay of excited states has been observed in a nucleus situated in the quadrant south-east of doubly magic Sn132, a region in which experimental information so far is limited to ground-state properties. Six γ rays with energies of 50, 86, 103, 227, 357, and 602 keV were observed following the β-delayed neutron emission from Cd85133, populated in the projectile fission of a U238 beam at the Radioactive Isotope Beam Factory at RIKEN within the EURICA project. The new experimental information is compared to the results of a modern realistic shell-model calculation, the first one in this region very far from stability, focusing in particular on the π0g9/2−1⊗ν1f7/2 particle-hole multiplet in In83132. In addition, theoretical estimates based on a scaling of the two-body matrix elements for the πh11/2−1⊗νg9/2 analog multiplet in Tl127208, one major proton and one major neutron shell above, are presented.

关键词： Beta decay 90 ≤ A ≤ 149 Radioactive beams Shell model

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β decay of semi-magic Cd130: Revision and extension of the level scheme of In130

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Physical Review C 2016年第2期94卷 024303-024303页

作者： A. Jungclaus H. Grawe S. Nishimura P. Doornenbal G. Lorusso G. S. Simpson P.-A. Söderström T. Sumikama J. Taprogge Z. Y. Xu H. Baba F. Browne N. Fukuda R. Gernhäuser G. Gey N. Inabe T. Isobe H. S. Jung D. Kameda G. D. Kim Y.-K. Kim I. Kojouharov T. Kubo N. Kurz Y. K. Kwon Z. Li H. Sakurai H. Schaffner Y. Shimizu K. Steiger H. Suzuki H. Takeda Zs. Vajta H. Watanabe J. Wu A. Yagi K. Yoshinaga G. Benzoni S. Bönig K. Y. Chae L. Coraggio J.-M. Daugas F. Drouet A. Gadea A. Gargano S. Ilieva N. Itaco F. G. Kondev T. Kröll G. J. Lane A. Montaner-Pizá K. Moschner D. Mücher F. Naqvi M. Niikura H. Nishibata A. Odahara R. Orlandi Z. Patel Zs. Podolyák A. Wendt Instituto de Estructura de la Materia CSIC E-28006 Madrid Spain GSI Helmholtzzentrum für Schwerionenforschung GmbH 64291 Darmstadt Germany RIKEN Nishina Center RIKEN 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan National Physical Laboratory NPL Teddington Middlesex TW11 0LW United Kingdom Department of Physics University of Surrey Guildford GU2 7XH United Kingdom LPSC Université Joseph Fourier Grenoble 1 CNRS/IN2P3 Institut National Polytechnique de Grenoble F-38026 Grenoble Cedex France Department of Physics Tohoku University Aoba Sendai Miyagi 980-8578 Japan Departamento de Física Teórica Universidad Autónoma de Madrid E-28049 Madrid Spain Department of Physics University of Tokyo Hongo 7-3-1 Bunkyo-ku 113-0033 Tokyo Japan School of Computing Engineering and Mathematics University of Brighton Brighton BN2 4GJ United Kingdom Physik Department E12 Technische Universität München D-85748 Garching Germany Institut Laue-Langevin B.P. 156 F-38042 Grenoble Cedex 9 France Department of Physics Chung-Ang University Seoul 156-756 Republic of Korea Rare Isotope Science Project Institute for Basic Science Daejeon 305-811 Republic of Korea Department of Nuclear Engineering Hanyang University Seoul 133-791 Republic of Korea School of Physics and State key Laboratory of Nuclear Physics and Technology Peking University Beijing 100871 China MTA Atomki P.O. Box 51 Debrecen H-4001 Hungary Department of Physics Osaka University Machikaneyama-machi 1-1 Osaka 560-0043 Toyonaka Japan Department of Physics Faculty of Science and Technology Tokyo University of Science 2641 Yamazaki Noda Chiba Japan INFN Sezione di Milano via Celoria 16 I-20133 Milano Italy Institut für Kernphysik Technische Universität Darmstadt D-64289 Darmstadt Germany Department of Physics Sungkyunkwan University Suwon 440-746 Republic of Korea Istituto Nazionale di Fisica Nucleare Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy CEA DAM DIF 91297 Arpajon cedex France

The β decay of the semi-magic nucleus Cd130 has been studied at the RIBF facility at the RIKEN Nishina Center. The high statistics of the present experiment allowed for a revision of the established level scheme of In130 and the observation of additional β feeding to high-lying core-excited states in In130. The experimental results are compared to shell-model calculations employing a model space consisting of the full major N=50–82 neutron and Z=28–50 proton shells and the NA-14 interaction, and good agreement is found.

关键词： Beta decay Electromagnetic transitions Energy levels & level densities Nuclear structure & decays Shell model 90 ≤ A ≤ 149

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Stochastic Parameterization to Represent Variability and Extremes in Climate Modeling

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Procedia Computer science 2014年 29卷 1146-1155页

作者： R. Langan R. Archibald M. Plumlee S. Mahajan D. Ricciuto C. Yang R. Mei J. Mao X. Shi J.S. Fu Climate Change Science Institute Oak Ridge National Laboratory Oak Ridge TN Computational and Applied Mathematics Group Oak Ridge National Laboratory Oak Ridge TN Industrial and Systems Engineering Georgia Institute of Technology Atlanta GA Computational Earth Sciences Group Oak Ridge National Laboratory Oak Ridge TN Environmental Science Division Oak Ridge National Laboratory Oak Ridge TN Department of Civil & Environmental Engineering University of Tennessee Knoxville TN

Unresolved sub-grid processes, those which are too small or dissipate too quickly to be captured within a model's spatial resolution, are not adequately parameterized by conventional numerical climate models. Sub-grid heterogeneity is lost in parameterizations that quantify only the ‘bulk effect’ of sub-grid dynamics on the resolved scales. A unique solution, one unreliant on increased grid resolution, is the employment of stochastic parameterization of the sub-grid to reintroduce variability. We administer this approach in a coupled land-atmosphere model, one that combines the single-column Community Atmosphere Model (CAM-SC) and the single-point Community Land Model (CLM-SP), by incorporating a stochastic representation of sub-grid latent heat flux to force the distribution of precipitation. Sub-grid differences in surface latent heat flux arise from the mosaic of Plant Functional Types (PFT) that describe terrestrial land cover. With the introduction of a stochastic parameterization framework to affect the distribution of sub-grid PFT's, we alter the distribution of convective precipitation over regions with high PFT variability. The stochastically forced precipitation probability density functions (pdf) show lengthened tails, demonstrating the retrieval of rare events. Through model data analysis we show that the stochastic model increases both the frequency and intensity of rare events in comparison to conventional deterministic parameterization.

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Time-stepping Methods for Constructing Periodic Solutions in Maximally Monotone Set-valued Dynamical Systems

Time-stepping Methods for Constructing Periodic Solutions in...

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IEEE Annual Conference on Decision and Control

作者： W. P. M. H. Heemels V. Sessa F. Vasca M. K. Camlibel Control Systems Technology group Department of Mechanical Engineering Eindhoven Univeristy of Technology the Netherlands Department of Engineering University of Sannio Benevento Italy Johan Bernoulli Institute for Mathematics and Computing Science University of Groningen the Netherlands

ISBN: (纸本)9781467360890

In this paper we study a class of set-valued dynamical systems that satisfy maximal monotonicity properties. This class includes linear relay systems, linear complementarity systems, and linear mechanical systems with dry friction under certain conditions. We discuss two numerical time-stepping schemes for the computation of periodic solutions of these systems when being periodically excited. For these two schemes we will provide formal mathematical justifications and compare them in terms of approximation accuracy and computation time using a numerical example.

关键词： Steady-state Piecewise linear approximation Accuracy Context Numerical models Interpolation

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Educational cooperation across countries by shared course materials: More than 10 years of experience

Educational cooperation across countries by shared course ma...

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2014 International Conference on Interactive Collaborative Learning, ICL 2014

作者： Bothe, Klaus Budimac, Zoran Putnik, Zoran Ivanovic, Mirjana Stoyanov, Stanimir Stoyanova-Doycev, Asya Zdravkova, Katerina Jakimovski, Boro Jurca, Ioan Nosovic, Novica Kalpic, Damir Cico, Betim Kajo, Elinda Čandrlić, Sanja Institute of Computer Science Humboldt University Berlin Berlin Germany Institute of Mathematics and Informatics University of Novi Sad Novi Sad Serbia Institute of Informatics University Paisii Hilendarski Plovdiv Bulgaria Institute of Informatics University Sts. Cyril and Methodius Skopje Macedonia Institute of Informatics Technical University Timisoara Timisoara Romania Dept. of Computer Science University of Sarajevo Sarajevo Bosnia and Herzegovina Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia Faculty of Contemporary Sciences and Technologies South East European University Tetovo Macedonia Faculty of Electrical Engineering Polytechnic University Tirana Tirana Albania Department of Informatics University of Rijeka Rijeka Croatia

ISBN: (纸本)9781479944378

At the beginning of the new century, we started with an educational project aimed at the joint development and shared use of teaching materials for software engineering education. The aim was to transfer knowledge, as well as to save expenses. Over the years, our cooperation did not only cover the development of the course, but also its delivery, e.g. by guest lecturing. This paper reports on the experience gained in a multi-country project. Both success factors and problems are outlined. © 2014 IEEE.

关键词： Software engineering

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LOD-MS for Gross-Pitaevskii Equation in Bose-Einstein Condensates

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Communications in computational Physics 2013年第6期14卷 219-241页

作者： Linghua Kong Jialin Hong Jingjing Zhang School of Mathematics and Information Science Jiangxi Normal UniversityNanchangJiangxi 330022P.R.China State Key Laboratory of Scientific and Engineering Computing Institute of Computational Mathematics and Scientific/Engineering ComputingAcademy of Mathematics and System ScienceChinese Academy of SciencesP.O.Box 2719Beijing 100190P.R.China School of Mathematics and Information Science Henan Polytechnic UniversityJiaozuoHenan 454000P.R.China

The local one-dimensional multisymplectic scheme(LOD-MS)is developed for the three-dimensional(3D)Gross-Pitaevskii(GP)equation in Bose-Einstein *** idea is originated from the advantages of multisymplectic integrators and from the cheap computational cost of the local one-dimensional(LOD)*** 3D GP equation is split into three linear LOD Schrodinger equations and an exactly solvable nonlinear Hamiltonian *** three linear LOD Schrodinger equations are multisymplectic which can be approximated by multisymplectic integrator(MI).The conservative properties of the proposed scheme are *** is ***,the scheme preserves the discrete local energy conservation laws and global energy conservation law if the wave function is variable *** is impossible for conventional MIs in nonlinear Hamiltonian *** numerical results show that the LOD-MS can simulate the original problems very *** are consistent with the numerical analysis.

关键词： LOD-MS Gross-Pitaevskii equation local one-dimensional method midpoint method conservation laws

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