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Etude De Limpact Des Recouvrements Calcul Communication Sur Des Algorithmes Paralleles De Calcul Matriciel
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Book Synopsis ETUDE DE L'IMPACT DES RECOUVREMENTS CALCUL/COMMUNICATION SUR DES ALGORITHMES PARALLELES DE CALCUL MATRICIEL by : NAKAN.. POURZANDI
Download or read book ETUDE DE L'IMPACT DES RECOUVREMENTS CALCUL/COMMUNICATION SUR DES ALGORITHMES PARALLELES DE CALCUL MATRICIEL written by NAKAN.. POURZANDI and published by . This book was released on 1995 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CETTE THESE, NOUS NOUS INTERESSONS AU PROBLEME DU RECOUVREMENT CALCUL/COMMUNICATION SUR LES ALGORITHMES PARALLELES ET CE QUE CETTE APPROCHE PEUT APPORTER A UNE AMELIORATION DES PERFORMANCES DES ALGORITHMES PARALLELES. LES CODES PARALLELES ONT SOUVENT ETE CONSIDERES COMME DES PHASES DE CALCUL ENTRECOUPEES DE PHASES DE COMMUNICATION. DANS CETTE PERSPECTIVE, TOUTE AMELIORATION DU CODE PASSAIT PAR LA DIMINUTION SEPAREE DU COUT DES COMMUNICATIONS OU DE CELUI DES CALCULS. NOUS ENTENDONS PAR UNE DIMINUTION SEPAREE QUE LES PROGRAMMEURS TRAVAILLAIENT SOIT UNIQUEMENT SUR LA PARTIE COMMUNICATIONS OU SOIT UNIQUEMENT SUR LA PARTIE CALCUL. DANS LA NOUVELLE GENERATION DE MACHINES PARALLELES, CHAQUE NUD POSSEDE UN PROCESSEUR DEDIE AUX COMMUNICATIONS. POUR POUVOIR BENEFICIER AU MAXIMUM DES POSSIBILITES DES MACHINES, IL CONVIENT DE POUVOIR UTILISER DE MANIERE SIMULTANEE LES PROCESSEURS DE CALCUL ET DE COMMUNICATION. LE RECOUVREMENT CALCUL/COMMUNICATION CONSISTE A UTILISER LE TEMPS DE CALCUL POUR EFFECTUER DES COMMUNICATIONS EN PARALLELE. CETTE APPROCHE NOUS PERMET DE MIEUX CONCEVOIR LES ALGORITHMES DANS LEUR ENSEMBLE, C'EST A DIRE AVEC LEURS PARTIES DE CALCUL ET LEURS PARTIES DE COMMUNICATION AFIN D'AMELIORER LA PERFORMANCE TOTALE. DANS CETTE THESE, NOUS MONTRONS LES AMELIORATIONS POSSIBLES SUR PLUSIEURS EXEMPLES D'ALGORITHMES PARALLELES: L'ELIMINATION DE GAUSS, LA MULTIPLICATION DE MATRICES ET LA METHODE DE JACOBI POUR LE CALCUL DES VALEURS PROPRES. AFIN D'UTILISER AU MAXIMUM LES CAPACITES DES MACHINES PARALLELES, NOUS EXPLORONS UNE NOUVELLE METHODE ALGORITHMIQUE POUR LE CALCUL DES VALEURS PROPRES QUI MALGRE SES FAIBLES PERFORMANCES SEQUENTIELLES EST TRES EFFICACE EN PARALLELE. NOUS VALIDONS CES METHODES D'OPTIMISATION ALGORITHMIQUE AVEC L'OPTIMISATION DE L'IMPLEMENTATION PARALLELE D'UNE APPLICATION DE SIMULATION DE LA DIFFUSION DE POLLUANTS
Book Synopsis L'IMPACT DES COMMUNICATIONS SUR LA COMPLEXITE DES ALGORITHMES PARALLELES by : EURIPIDIS.. BAMPIS
Download or read book L'IMPACT DES COMMUNICATIONS SUR LA COMPLEXITE DES ALGORITHMES PARALLELES written by EURIPIDIS.. BAMPIS and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE CONCERNE L'ETUDE DE METHODES ET D'OUTILS POUR LA CONCEPTION ET L'ANALYSE D'ALGORITHMES PARALLELES EFFICACES. NOUS ESSAYONS D'INTEGRER LES TEMPS DE COMMUNICATION AU MODELE CLASSIQUE D'ORDONNANCEMENT. LE COUT DES COMMUNICATIONS DES DONNEES, ENTRE LA MEMOIRE PARTAGEE ET LES PROCESSEURS, EST, DANS LE CAS D'UNE ARCHITECTURE MIMD A MEMOIRE PARTAGEE, TOTALEMENT DIFFERENT DE CELUI ENTRE LES PROCESSEURS POUR UNE ARCHITECTURE MIMD A MEMOIRE DISTRIBUEE. C'EST POURQUOI NOUS PROPOSONS TROIS MODELES THEORIQUES, UN POUR CHAQUE TYPE D'ARCHITECTURE CONSIDEREE. NOUS ETUDIONS LA PARALLELISATION DE PROBLEMES CONNUS, EN CONSIDERANT DES GRAPHES DE PRECEDENCE TELS QUE LES GRAPHES ISSUS DE LA METHODE DE L'ELIMINATION DE GAUSS, DU TRI OU DES METHODES DIVISER POUR REGNER. EN ANNEXE SE TROUVE UN ARTICLE OU NOUS PROPOSONS UN ALGORITHME PARALLELE -EN CONSIDERANT LE MODELE PRAM- QUI TRANSFORME LE PROBLEME DE LA RECHERCHE D'UN CYCLE HAMILTONIEN DANS UN TOURNOI D'ORDRE N, AU PROBLEME DE LA RECHERCHE D'UN CHEMIN HAMILTONIEN DANS CE TOURNOI
Book Synopsis Optimisation de la communication et de la distribution des données pour des solveurs parallèles directs en algèbre linéaire dense et creuse by : Pierre Ramet
Download or read book Optimisation de la communication et de la distribution des données pour des solveurs parallèles directs en algèbre linéaire dense et creuse written by Pierre Ramet and published by . This book was released on 2000 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE TRAITE DES PROBLEMES DU CALCUL HAUTE PERFORMANCE ET PLUS SPECIFIQUEMENT DU CALCUL PARALLELE SCIENTIFIQUE POUR DES APPLICATIONS IRREGULIERES EN VRAIE GRANDEUR. DANS UNE PREMIERE PARTIE, NOUS PRESENTONS UNE CONTRIBUTION AUX OPTIMISATIONS DU RECOUVREMENT CALCUL/COMMUNICATION SUR DES ARCHITECTURES PARALLELES A MEMOIRE DISTRIBUEE, AVEC EN PARTICULIER LE CALCUL DU GRAIN OPTIMAL ET DE LA TAILLE OPTIMALE DES PAQUETS A COMMUNIQUER. NOUS NOUS SOMMES EGALEMENT INTERESSES AU CALCUL DE LA GRANULARITE MAXIMISANT LE RECOUVREMENT CALCUL/COMMUNICATION POUR L'ALGORITHME DE FACTORISATION DE CHOLESKY POUR DES MATRICES PLEINES EN EXPLOITANT L'IRREGULARITE DUE A LA SYMETRIE DE CETTE MATRICE. CES TRAVAUX ONT DEBOUCHE SUR LE DEVELOPPEMENT D'UNE BIBLIOTHEQUE PORTABLE INTEGRANT CES MECANISMES DE DECOUPAGE DES MESSAGES. LA SECONDE PARTIE DECRIT UN ORDONNANCEMENT STATIQUE DES CALCULS POUR LE PROBLEME DE LA RESOLUTION PARALLELE DIRECTE DE GRANDS SYSTEMES LINEAIRES CREUX, CONDUISANT AU MASQUAGE QUASI-TOTAL DES COMMUNICATIONS. LA MISE EN UVRE DE CES TRAVAUX NOUS A CONDUIT A IMPLEMENTER UN SOLVEUR DIRECT PARALLELE POUR LA FACTORISATION DE CHOLESKY PAR BLOCS, AVEC DES DISTRIBUTION 1D ET / OU 2D, INTEGRANT L'APPROCHE FAN-IN ET PRESENTANT DES PERFORMANCES QUI SE COMPARENT TRES FAVORABLEMENT AUX MEILLEURS SOLVEURS PARALLELES DIRECTS ACTUELS.
Book Synopsis New Splitting Iterative Methods for Solving Multidimensional Neutron Transport Equations by : Jacques Tagoudjeu
Download or read book New Splitting Iterative Methods for Solving Multidimensional Neutron Transport Equations written by Jacques Tagoudjeu and published by Universal-Publishers. This book was released on 2011-04 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis focuses on iterative methods for the treatment of the steady state neutron transport equation in slab geometry, bounded convex domain of Rn (n = 2,3) and in 1-D spherical geometry. We introduce a generic Alternate Direction Implicit (ADI)-like iterative method based on positive definite and m-accretive splitting (PAS) for linear operator equations with operators admitting such splitting. This method converges unconditionally and its SOR acceleration yields convergence results similar to those obtained in presence of finite dimensional systems with matrices possessing the Young property A. The proposed methods are illustrated by a numerical example in which an integro-differential problem of transport theory is considered. In the particular case where the positive definite part of the linear equation operator is self-adjoint, an upper bound for the contraction factor of the iterative method, which depends solely on the spectrum of the self-adjoint part is derived. As such, this method has been successfully applied to the neutron transport equation in slab and 2-D cartesian geometry and in 1-D spherical geometry. The self-adjoint and m-accretive splitting leads to a fixed point problem where the operator is a 2 by 2 matrix of operators. An infinite dimensional adaptation of minimal residual and preconditioned minimal residual algorithms using Gauss-Seidel, symmetric Gauss-Seidel and polynomial preconditioning are then applied to solve the matrix operator equation. Theoretical analysis shows that the methods converge unconditionally and upper bounds of the rate of residual decreasing which depend solely on the spectrum of the self-adjoint part of the operator are derived. The convergence of theses solvers is illustrated numerically on a sample neutron transport problem in 2-D geometry. Various test cases, including pure scattering and optically thick domains are considered.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Download or read book Buyology written by Martin Lindstrom and published by Currency. This book was released on 2010-02-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • “A fascinating look at how consumers perceive logos, ads, commercials, brands, and products.”—Time How much do we know about why we buy? What truly influences our decisions in today’s message-cluttered world? In Buyology, Martin Lindstrom presents the astonishing findings from his groundbreaking three-year, seven-million-dollar neuromarketing study—a cutting-edge experiment that peered inside the brains of 2,000 volunteers from all around the world as they encountered various ads, logos, commercials, brands, and products. His startling results shatter much of what we have long believed about what captures our interest—and drives us to buy. Among the questions he explores: • Does sex actually sell? • Does subliminal advertising still surround us? • Can “cool” brands trigger our mating instincts? • Can our other senses—smell, touch, and sound—be aroused when we see a product? Buyology is a fascinating and shocking journey into the mind of today's consumer that will captivate anyone who's been seduced—or turned off—by marketers' relentless attempts to win our loyalty, our money, and our minds.
Book Synopsis Methods in Membrane Lipids by : Alex M. Dopico
Download or read book Methods in Membrane Lipids written by Alex M. Dopico and published by Springer Science & Business Media. This book was released on 2007-08-30 with total page 1265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a compendium of methodologies for the study of membrane lipids, varying from traditional lab bench experimentation to computer simulation and theoretical models. The volume provides a comprehensive set of techniques for studying membrane lipids with a strong biophysical emphasis. It compares the various available techniques including the pros and cons as seen by the experts.
Book Synopsis Sparse Image and Signal Processing by : Jean-Luc Starck
Download or read book Sparse Image and Signal Processing written by Jean-Luc Starck and published by Cambridge University Press. This book was released on 2015-10-14 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents state-of-the-art sparse and multiscale image and signal processing with applications in astronomy, biology, MRI, media, and forensics.
Book Synopsis Product Life-Cycle Management by : Max Giordano
Download or read book Product Life-Cycle Management written by Max Giordano and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive view of the most recent major international research in the field of tolerancing, and is an excellent resource for anyone interested in Computer Aided Tolerating. It is organized into 4 parts. Part 1 focuses on the more general problems of tolerance analysis and synthesis, for tolerancing in mechanical design and manufacturing processes. Part 2 specifically highlights the simulation of assembly with defects, and the influence of tolerances on the quality of the assembly. Part 3 deals with measurement aspects, and quality control throughout the life cycle. Different measurement technologies and methods for estimating uncertainty are considered. In Part 4, different aspects of tolerancing and their interactions are explored, from the definition of functional requirement to measurement processes in a PLM approach.
Book Synopsis Statistical Applications in the Earth Sciences by : F. P. Agterberg
Download or read book Statistical Applications in the Earth Sciences written by F. P. Agterberg and published by Energy, Mines and Resources Canada. This book was released on 1990 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collection of papers presented at the Colloquium, covering the broad subject areas of spatial data integration, statistical analysis of geoscience data, and quantitative stratigraphy. Working Group reports are included as well.
Book Synopsis Information Theory and Esthetic Perception by : Abraham A. Moles
Download or read book Information Theory and Esthetic Perception written by Abraham A. Moles and published by . This book was released on 1968 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitroxides written by Olivier Ouari and published by Royal Society of Chemistry. This book was released on 2021-05-13 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitroxides are versatile small organic molecules possessing a stabilised free radical. With their unpaired electron spin they display a unique reactivity towards various environmental factors, enabling a diverse range of applications. They have uses as synthetic tools, such as catalysts or building blocks; imaging agents and probes in biomedicine and materials science; for medicinal antioxidant applications; and in energy storage. Polynitroxides (polymers bearing pendant nitroxide sidechains) have been used in organic radical batteries, oxidation catalysts and in exchange reactions for constructing complex architectures. Chapters in this book cover the synthesis of nitroxides, EPR studies and magnetic resonance applications, physiochemical studies, and applications including in batteries, imaging and organic synthesis. With contributions from leaders in the field, Nitroxides will be of interest to graduate students and researchers across chemistry, physics, biology and materials science.
Book Synopsis Sparse Image and Signal Processing by : Jean-Luc Starck
Download or read book Sparse Image and Signal Processing written by Jean-Luc Starck and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents the state of the art in sparse and multiscale image and signal processing.
Book Synopsis Ecritures digitales by : Claire Clivaz
Download or read book Ecritures digitales written by Claire Clivaz and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecritures digitales aims to demonstrate how digital writing, as new technology, contributes to the emergence of a reconfigured relationship between the human body and the machines, and how this transition influences the Jewish-Christian textual corpus referred to as "the Scriptures". Ecritures digitales souhaite démontrer de quelle manière l'écriture digitale, en tant que nouvelle technologie, contribue à l'émergence d'une relation innovante entre le corps humain et les machines, et influence le corpus textuel judéo-chrétien désigné comme «les Ecritures».
Book Synopsis Hydrology of Mediterranean and Semiarid Regions by : Eric Servat
Download or read book Hydrology of Mediterranean and Semiarid Regions written by Eric Servat and published by . This book was released on 2003 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applied Reactor Physics by : Alain Hébert
Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Nuclear Power Cost Evaluation: Equipment costs by : Kaiser Engineers
Download or read book Guide to Nuclear Power Cost Evaluation: Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
