Download or read book Optimisation de forme et domaines fictifs written by Laurent Tomas and published by . This book was released on 1997 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE CE TRAVAIL EST L'ETUDE D'ALGORITHMES D'OPTIMISATION DE FORME UTILISANT DES METHODES DE DOMAINES FICTIFS. DANS LE PREMIER CHAPITRE, ON PRESENTE UNE SYNTHESE DES RESULTATS CLASSIQUES EN OPTIMISATION DE FORME, DANS LE CAS CONTINU ET DANS LE CAS DISCRET. ON DEMONTRE QUE CERTAINES METHODES, A PRIORI DIFFERENTES, DE CALCUL DU GRADIENT DISCRET DE LA FONCTION A MINIMISER CONDUISENT A DES RESULTATS IDENTIQUES. DANS LE DEUXIEME CHAPITRE, ON ETUDIE LES METHODES DE DOMAINES FICTIFS AVEC MULTIPLICATEURS DE LAGRANGE. ON INTRODUIT UN CADRE GENERAL ABSTRAIT QUI EST BIEN ADAPTE A LA RESOLUTION DE PROBLEMES DE DIRICHLET OU DE NEUMANN. ON PROPOSE NOTAMMENT UNE APPROCHE QUI UTILISE DES MULTIPLICATEURS DE LAGRANGE SUR UNE PARTIE B DU COMPLEMENTAIRE DE DANS LE DOMAINE FICTIF . DANS LE TROISIEME CHAPITRE, ON ETUDIE EN DETAIL LES PROBLEMES OBTENUS APRES DISCRETISATION DE CEUX INTRODUITS AU CHAPITRE AU CHAPITRE DEUX. ON DISTINGUE DEUX TYPES DE PROBLEMES SUIVANT QU'ON UTILISE DES MAILLAGES DE ADAPTES A OU NON. AVEC DES MAILLAGES ADAPTES, ON OBTIENT UNE ESTIMATION D'ERREUR POUR DES PROBLEMES DE DIRICHLET ET ON DEMONTRE QUE LE CONDITIONNEMENT DU SYSTEME A RESOUDRE EST INDEPENDANT DE H. PAR AILLEURS, ON DEMONTRE DES ESTIMATIONS D'ERREUR POUR LE PROBLEME DE DIRICHLET QUAND ON UTILISE DES MULTIPLICATEURS SUR B ET UNE TRIANGULATION UNIFORME DE NON ADAPTEE A . ON DETAILLE ENSUITE UNE ESTIMATION DU CONDITIONNEMENT DU PROBLEME A RESOUDRE POUR UN CHOIX PARTICULIER DE MULTIPLICATEURS. ENFIN, LE QUATRIEME CHAPITRE EST CONSACRE A LA PRESENTATION D'ALGORITHMES D'OPTIMISATION DE FORME A BASE DE DOMAINES FICTIFS. ON MONTRE QUE, CONTRAIREMENT AUX APPROCHES CLASSIQUES EN DOMAINES FICTIFS, UN CERTAIN CHOIX DE MULTIPLICATEURS SUR B CONDUIT A UN PROBLEME DISCRET DIFFERENTIABLE. ON PROPOSE ENTRE AUTRES UN ALGORITHME DE TYPE ONE SHOT POUR LA RESOLUTION DE PROBLEMES D'OPTIMISATION DE FORME.

Download or read book Computational Methods for Optimal Design and Control written by J. Borggaard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the proceedings of the Second International Workshop on Optimal Design and Control, held in Arlington, Virginia, 30 September-3 Octo ber, 1997. The First Workshop was held in Blacksburg, Virginia in 1994. The proceedings of that meeting also appeared in the Birkhauser series on Progress in Systems and Control Theory and may be obtained through Birkhauser. These workshops were sponsored by the Air Force Office of Scientific Re search through the Center for Optimal Design and Control (CODAC) at Vrrginia Tech. The meetings provided a forum for the exchange of new ideas and were designed to bring together diverse viewpoints and to highlight new applications. The primary goal of the workshops was to assess the current status of research and to analyze future directions in optimization based design and control. The present volume contains the technical papers presented at the Second Workshop. More than 65 participants from 6 countries attended the meeting and contributed to its success. It has long been recognized that many modern optimal design problems are best viewed as variational and optimal control problems. Indeed, the famous problem of determining the body of revolution that produces a minimum drag nose shape in hypersonic How was first proposed by Newton in 1686. Optimal control approaches to design can provide theoretical and computational insight into these problems. This volume contains a number of papers which deal with computational aspects of optimal control.

Download or read book Conception optimale de structures written by Grégoire Allaire and published by Springer Science & Business Media. This book was released on 2006-10-12 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conception optimale des structures est une introduction à la conception optimale de structures, appelée aussi optimisation de formes. Il est principalement destiné à un public mixte de mathématiciens appliqués et de mécaniciens que relient un même intérêt pour les applications numériques.

Download or read book RAIRO written by and published by . This book was released on 1995 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book tude des m thodes num riques pour l optimisation de forme en m canique des solides written by Philippe-André Luneau and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail porte sur le problème d'optimisation de forme dans le cadre de la mécanique des solides en petites déformations, et plus spécialement sur les différentes méthodes numériques utilisées pour résoudre le problème. Une présentation de la théorie de la mécanique des milieux continus, axée sur la mécanique des solides, sera présentée. L'équation de l'équilibre dynamique, qui sera utilisée comme équation d'état dans le reste du mémoire, y sera dérivée. Par la suite, un bref rappel de la théorie de l'optimisation dans les espaces de Hilbert sera fait, particulièrement sur les conditions d'optimalité pour des problèmes avec ou sans contrainte. On étudiera également les différents modèles qui existent pour représenter mathématiquement l'espace des formes admissibles, ainsi que les difficultés théoriques qui se cachent derrière le problème d'optimisation de forme. Puis, on s'intéressera aux méthodes numériques utiles à la résolution de ce problème : en premier, des paradigmes de discrétisation pour résoudre l'équation d'état en mécanique seront présentés, notamment la méthode des éléments finis (MEF). Deuxièmement, une revue des différentes techniques d'optimisation numérique sera faite, pour donner une vue d'ensemble des algorithmes qui peuvent être utilisés sur le problème d'optimisation de forme. Finalement, quelques unes de ces méthodes seront implémentées dans le logiciel d'éléments finis MEF++ et testées sur des cas classiques d'optimisation topologique dans le paradigme SIMP, principalement dans le but de faire une analyse de leur comportement sur des instances de dimension élevée, en parallèle, sur une grappe de calcul.

Download or read book Modelling in Aquatic Chemistry written by OECD Nuclear Energy Agency and published by Nuclear Energy Agency. This book was released on 1997 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimal Shape Design written by B. Kawohl and published by Springer Science & Business Media. This book was released on 2000-11-16 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimal Shape Design is concerned with the optimization of some performance criterion dependent (besides the constraints of the problem) on the "shape" of some region. The main topics covered are: the optimal design of a geometrical object, for instance a wing, moving in a fluid; the optimal shape of a region (a harbor), given suitable constraints on the size of the entrance to the harbor, subject to incoming waves; the optimal design of some electrical device subject to constraints on the performance. The aim is to show that Optimal Shape Design, besides its interesting industrial applications, possesses nontrivial mathematical aspects. The main theoretical tools developed here are the homogenization method and domain variations in PDE. The style is mathematically rigorous, but specifically oriented towards applications, and it is intended for both pure and applied mathematicians. The reader is required to know classical PDE theory and basic functional analysis.

Download or read book NATO Glossary of Terms and Definitions written by North Atlantic Treaty Organization and published by CreateSpace. This book was released on 2013-03-08 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: NATO Glossary of terms and definitions (English and French). Listing terms of military significance and their definitions for use in NATO.

Download or read book Innovate Bristol written by Sven Boermeester and published by . This book was released on 2019-12 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.

Download or read book Applied Computational Geometry Towards Geometric Engineering written by Ming C. Lin and published by Springer Science & Business Media. This book was released on 1996-09-25 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Content Description #Anthology selected from contributions to the First ACM Workshop on Applied Computational Geometry.#Includes bibliographical references and index.

Download or read book Artificial Neural Networks in Hydrology written by R.S. Govindaraju and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: R. S. GOVINDARAJU and ARAMACHANDRA RAO School of Civil Engineering Purdue University West Lafayette, IN. , USA Background and Motivation The basic notion of artificial neural networks (ANNs), as we understand them today, was perhaps first formalized by McCulloch and Pitts (1943) in their model of an artificial neuron. Research in this field remained somewhat dormant in the early years, perhaps because of the limited capabilities of this method and because there was no clear indication of its potential uses. However, interest in this area picked up momentum in a dramatic fashion with the works of Hopfield (1982) and Rumelhart et al. (1986). Not only did these studies place artificial neural networks on a firmer mathematical footing, but also opened the dOOf to a host of potential applications for this computational tool. Consequently, neural network computing has progressed rapidly along all fronts: theoretical development of different learning algorithms, computing capabilities, and applications to diverse areas from neurophysiology to the stock market. . Initial studies on artificial neural networks were prompted by adesire to have computers mimic human learning. As a result, the jargon associated with the technical literature on this subject is replete with expressions such as excitation and inhibition of neurons, strength of synaptic connections, learning rates, training, and network experience. ANNs have also been referred to as neurocomputers by people who want to preserve this analogy.

Download or read book Sustainable Production System written by Clément Morlat and published by John Wiley & Sons. This book was released on 2020-06-03 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wealth is no longer just an ability to live well in a world shaped by human activities. It is also an ability to push back or defer the limits of a world in biological and climatic closure. This book examines the theoretical conflicts and the power plays which often oppose the socio-political and technical-financial practices of recognition of what intervenes in the production of this wealth – i.e. of what has value. It lays down the principles of a contributory modeling method, allowing debates around the concept of development; the building of scenarios; the negotiation of their implementation; and a cross-sectoral reading of their social, ecological and economic costs. This method, called Dynamic Modeling of Cost Systems, is based on a territorial communication device which articulates political, contractual and accounting innovations using deliberative and normative digital tools. It combines different local representations of value, in order to approach wealth through an integrated analysis of micro-, meso- and macro- issues.

Download or read book Chemical Thermodynamics of Neptunium and Plutonium written by Robert J. Lemire and published by Elsevier. This book was released on 2001-08-26 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike earlier books in this series, this review describes the selection of chemical thermodynamic data for species of two elements, neptunium and plutonium. Although this came about more by circumstance than design, it has allowed for a more consistent approach to chemical interpretation than might have occurred in two separate treatments. It has also drawn attention to cases where the available data do not show expected parallels, and where further work may be useful to confirm or refute apparent differences in the behaviour of neptunium and plutonium.

Download or read book Symbolic Economies written by Jean-Joseph Goux and published by Cornell University Press. This book was released on 1990 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major participant in the influential Tel Quel group in France, Jean-Joseph Goux here offers a bold reevaluation of both the Marxist economic model and the Freudian concept of the unconscious. Symbolic Economies makes available for the first time in English generous selections from Goux's Freud, Marx: Economie et symbolique (1973) and Les iconoclastes (1978). Goux brings the theories of historical materialism and of psychoanalysis into play to illuminate and enrich each other, and undertakes a compelling integration of the contributions of structuralism and post-structuralism. Looking closely at the work of such major figures as Lacan, Derrida, and Nietzsche, Goux extends the implications of Marxism and Freudianism to an interdisciplinary semiotics of value and proposes a radical concept of exchange. Literary theorists, philosophers, social scientists, cultural historians, and feminist critics alike will welcome this important and provocative work.

Download or read book Beyond 2000 in Computational Geotechnics written by Ronald B.J. Brinkgreve and published by Routledge. This book was released on 2019-01-22 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented during the first international PLAXIS symposium. Topics covered include: general geo-technical aspects; tunnels and deep excavations, and education and research. This pack is meant for the user of the PLAXIS program, as well as engineers and researchers.

Download or read book Taxation the State and Society written by Marc Leroy and published by P.I.E-Peter Lang S.A., Editions Scientifiques Internationales. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates the relationship between taxation, the State and society in democracy. Fiscal sociology is a broad social science in terms of its disciplines: law, economics, sociology, political science, management, economics, psychology etc. are mobilized. Fiscal sociology is general because it tackles a wide range of problems: genesis, development and crisis of the State, policy factors (ideas, institutions, division of left and right, lobbying etc.), vote-catching of the ruling elite, resilience of the welfare State, neo-liberal ideology of market efficiency, impact of capitalist globalization, democratic political choices and constraints on the functions of the interventionist State etc. It is empirical in terms of understanding the financing of public action: social division of society by the tax policy, growth of public expenditure, bureaucratic labelling of the tax deviance, budget performance, rationality of taxpayers, complex rules etc. It analyses the incoherence of a societal regulation of globalization: redistribution and inequalities of incomes, tax competition between the States, tax havens, tax planning and relocations of the multinational groups, action of the European Union, the OECD etc. It studies the conditions for a tax citizenbased conception of a democratic social contract.

Download or read book Combinatorial Physics written by Adrian Tanasa and published by Oxford University Press. This book was released on 2021 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of the book is to use combinatorial techniques to solve fundamental physics problems, and vice-versa, to use theoretical physics techniques to solve combinatorial problems.