Download or read book R solution du probl me de Stokes par une m thode de d composition de domaines written by Annie Fischler and published by . This book was released on 1985 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LE CADRE DE LA RESOLUTION D'UN PROBLEME DE TYPE POISSON, ON PRESENTE LE PRINCIPE DE CETTE DECOMPOSITION QUI SERA ENSUITE APPLIQUEE AU PROBLEME DE STOKES. ON MONTRE ENSUITE DE QUELLE MANIERE CETTE METHODE, DANS SA VERSION QUASI-DIRECTE APPLIQUEE A DES PROBLEMES DE POISSON ET/OU DE STOKES, PEUT S'INSERER DANS UN ALGORITHME DE TYPE ADI DE RESOLUTION DES EQUATIONS DE NAVIER-STOKES EN ELEMENTS FINIS. ON DEFINIT NOTAMMENT UN TRAITEMENT "LOCAL" DU PROBLEME DE CONVECTION ISSU DE CET ALGORITHME EN PRECISANT CES LIMITES

Download or read book Approximation l ments finis d quations aux d riv es partielles par une m thode de d composition de domaines written by Jean-Paul Martinaud and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: On présente deux méthodes (primale et duale) de résolution par décomposition de domaine : le principe de ces méthodes est de découper le domaine de calcul en sous domaines de manière à obtenir des problèmes qui puissent être résolus indépendament. Description des deux méthodes et implémentation dans un cadre éléments finis. Description de trois algorithmes de gradient conjugué pour la résolution du problème de décomposition. Résultats pour un problème d'écoulement en cavité carrée et pour le calcul de surcotes en mer du Nord.

Download or read book RESOLUTION PAR LA METHODE DES ELEMENTS FINIS DES EQUATIONS DE NAVIER STOKES EN FORMULATION FONCTION DE COURANT TOURBILLON written by FATTH-ALLAH.. GHADI and published by . This book was released on 1994 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE TRAVAIL, NOUS PROPOSONS UNE METHODE MIXTE EN FONCTION DE COURANT-TOURBILLON POUR RESOUDRE LE PROBLEME DE STOKES DANS DES DOMAINES BORNES REGULIERS DE R. NOUS ETABLISSONS PAR LA SUITE DES ESTIMATIONS D'ERREUR DANS LE CADRE DES FORMULATIONS MIXTES CLASSIQUES. DU POINT DE VUE NUMERIQUE, NOUS METTONS EN UVRE UNE METHODE BASEE SUR L'APPROXIMATION D'UNE BASE HARMONIQUE POUR RESOUDRE LE PROBLEME DE STOKES. PAR AILLEURS NOUS ETENDONS CETTE METHODE AU CAS DU PROBLEME DE NAVIER-STOKES ET AFIN DE COMBATTRE LA CONVECTION DOMINANTE NOUS FAISONS APPEL A LA TECHNIQUE DE PETROV-GALERKIN

Download or read book An Index and Other Useful Information 501 1000 written by Albrecht Dold and published by . This book was released on 1984 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R solution du probl me de stokes par une m thode multigrille written by Sylvie Martel and published by . This book was released on 1988 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Probl me de Stokes avec des conditions aux limites non lin aires written by Mohamed Khaled Gdoura and published by . This book was released on 2011 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail est un premier pas dans l’analyse math ́ematique des probl`emes li ́es `a la simulation du remplissage du moule par un polym`ere fondu en tenant compte de l’ ́eventuel glissement sur les parois solides. Notre travail est focalis ́e sur le probl`eme de Stokes avec des conditions aux limites de type Tresca vue que les r ́esultats d’analyse num ́erique de ce type de probl`emes sont tr`es rares. Dans la premi`ere partie on commence d’abord par ́ecrire le probl`eme primal sous forme d’une in ́equation variationnelle. Le terme de frottement apparait sous forme d’une fonction non-diff ́erentiable. On propose par la suite une formulation mixte `a trois champs dans laquelle on dualise le frottement et on impose div(u) = 0 `a l’aide du multiplicateur de Lagrange p s’identifiant `a la pression. L’existence et l’unicit ́e de la solution de cette formulation est garantie par une condition inf-sup continue qu’on prouve. Les ́el ́ements finis P1 bulle/P1 pour le champs (u, p) et P1 pour le multiplicateur d ́efinit sur le bord de Tresca ont permis de discr ́etiser le probl`eme r ́esultant.On montre que des conditions inf-sup discr`etes découplées sur le pression p et la contrainte tangentielle sont suffisantes pour la stabilit ́e du probl`eme discret. Des estimations d’erreurs optimales ont ́et ́e d ́eriv ́ees. La deuxi`eme partie porte sur l’estimation de la valeur optimale des p ́enalit ́es des algorithmes utilis ́es, connus respectivement dans la litt ́erature sous le nom ALG2 et ALG3. L’ ́equivalence entre les m ́ethodes de directions altern ́ees et la formulation en lagrangien augment ́e a permis de r ́e ́ecrire les algorithmes sous forme d’un probl`eme d’ ́evolution dual discr ́etis ́e en temps par un sch ́ema de splitting classique mettant en jeu des op ́erateurs multivoques maximaux monotones. On montre d’abord la convergence dans le cas continu des deux algorithmes vers la solution stationnaire du probl`eme d’ ́evolution. On d ́eduit par la suite la valeur optimale de la p ́enalit ́e de chaque algorithme `a partir de l’estimation de sa vitesse de convergence. La derni`ere partie porte sur deux m ́ethodes de d ́ecomposition de domaine bas ́ees sur les algorithmes d’Uzawa appliqu ́es au probl`eme de d ́epart. Des tests num ́eriques ont ́et ́e r ́ealis ́es et un pr ́econditionneur a ́et ́e proposé pour la deuxième approche.

Download or read book Singular and Degenerate Cauchy Problems written by and published by Academic Press. This book was released on 1977-01-13 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, we study theoretical and practical aspects of computing methods for mathematical modelling of nonlinear systems. A number of computing techniques are considered, such as methods of operator approximation with any given accuracy; operator interpolation techniques including a non-Lagrange interpolation; methods of system representation subject to constraints associated with concepts of causality, memory and stationarity; methods of system representation with an accuracy that is the best within a given class of models; methods of covariance matrix estimation;methods for low-rank matrix approximations; hybrid methods based on a combination of iterative procedures and best operator approximation; andmethods for information compression and filtering under condition that a filter model should satisfy restrictions associated with causality and different types of memory.As a result, the book represents a blend of new methods in general computational analysis,and specific, but also generic, techniques for study of systems theory ant its particularbranches, such as optimal filtering and information compression.- Best operator approximation,- Non-Lagrange interpolation,- Generic Karhunen-Loeve transform- Generalised low-rank matrix approximation- Optimal data compression- Optimal nonlinear filtering

Download or read book Current Programs written by and published by . This book was released on 1975 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book INIS Atomindeks written by and published by . This book was released on 1970 with total page 1402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Methods for Nonlinear Variational Problems written by Roland Glowinski and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the mathematical background and reviews the techniques for solving problems, including those that require large computations such as transonic flows for compressible fluids and the Navier-Stokes equations for incompressible viscous fluids. Finite element approximations and non-linear relaxation, and nonlinear least square methods are all covered in detail, as are many applications. This volume is a classic in a long-awaited softcover re-edition.

Download or read book Analytic Semigroups and Optimal Regularity in Parabolic Problems written by Alessandra Lunardi and published by Springer Science & Business Media. This book was released on 2012-12-13 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book shows how the abstract methods of analytic semigroups and evolution equations in Banach spaces can be fruitfully applied to the study of parabolic problems. Particular attention is paid to optimal regularity results in linear equations. Furthermore, these results are used to study several other problems, especially fully nonlinear ones. Owing to the new unified approach chosen, known theorems are presented from a novel perspective and new results are derived. The book is self-contained. It is addressed to PhD students and researchers interested in abstract evolution equations and in parabolic partial differential equations and systems. It gives a comprehensive overview on the present state of the art in the field, teaching at the same time how to exploit its basic techniques. - - - This very interesting book provides a systematic treatment of the basic theory of analytic semigroups and abstract parabolic equations in general Banach spaces, and how this theory may be used in the study of parabolic partial differential equations; it takes into account the developments of the theory during the last fifteen years. (...) For instance, optimal regularity results are a typical feature of abstract parabolic equations; they are comprehensively studied in this book, and yield new and old regularity results for parabolic partial differential equations and systems. (Mathematical Reviews) Motivated by applications to fully nonlinear problems the approach is focused on classical solutions with continuous or Hölder continuous derivatives. (Zentralblatt MATH)

Download or read book An Eassay on the Psychology of Invention in the Mathematical Field written by Jacques Hadamard and published by Franklin Classics Trade Press. This book was released on 2018-11-11 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Jacques Hadamard written by Vladimir Gilelevič Mazʹâ and published by American Mathematical Soc.. This book was released on 1999 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a fascinating story of the long life and great accomplishments of Jacques Hadamard (1865-1963), who was once called 'the living legend of mathematics'. As one of the last universal mathematicians, Hadamard's contributions to mathematics are landmarks in various fields. His life is linked with world history of the 20th century in a dramatic way. This work provides an inspiring view of the development of various branches of mathematics during the 19th and 20th centuries.Part I of the book portrays Hadamard's family, childhood and student years, scientific triumphs, and his personal life and trials during the first two world wars. The story is told of his involvement in the Dreyfus affair and his subsequent fight for justice and human rights. Also recounted are Hadamard's worldwide travels, his famous seminar, his passion for botany, his home orchestra, where he played the violin with Einstein, and his interest in the psychology of mathematical creativity. Hadamard's life is described in a readable and inviting way.The authors humorously weave throughout the text his jokes and the myths about him. They also movingly recount the tragic side of his life. Stories about his relatives and friends, and old letters and documents create an authentic and colorful picture. The book contains over 300 photographs and illustrations. Part II of the book includes a lucid overview of Hadamard's enormous work, spanning over six decades. The authors do an excellent job of connecting his results to current concerns.While the book is accessible to beginners, it also provides rich information of interest to experts. Vladimir Mazya and Tatyana Shaposhnikova were the 2003 laureates of the Insitut de France's Prix Alfred Verdaguer. One or more prizes are awarded each year, based on suggestions from the Academie francaise, the Academie de sciences, and the Academie de beaux-arts, for the most remarkable work in the arts, literature, and the sciences. In 2003, the award for excellence was granted in recognition of Mazya and Shaposhnikova's book, ""Jacques Hadamard, A Universal Mathematician"", which is both an historical book about a great citizen and a scientific book about a great mathematician.

Download or read book Microwave Imaging Methods and Applications written by Matteo Pastorino and published by Artech House. This book was released on 2018-06-30 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave Imaging Methods and Applications provides practitioners and researchers with a complete overview of the latest and most important noninvasive and nondestructive techniques for inspecting structures and bodies by using microwaves. Placing emphasis on applications, the book considers many areas, from medical imaging and security… to industrial engineering and subsurface prospection. For each application, readers are presented with the objectives of the inspection and related challenges. Moreover, this groundbreaking resource details computational methods that can be used to solve inverse problems related to specific applications. Including clear examples or the most significant practical results, this forward-looking reference focuses on systems that have been recently developed. Professionals gain the knowledge needed to compare imaging methods used in different applications and develop new uses of imaging apparatuses and systems.

Download or read book Risk Evaluation and Biological Reference Points for Fisheries Management written by National Research Council Canada and published by NRC Research Press. This book was released on 1993 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented: 1) Reference points for fisheries management: the western Canadian experience; 2) Reference points for fisheries management: the eastern Canadian experience; 3) Reference points for fisheries management: the ICES experience; 4) Spawning stock biomass per recruit in fisheries management: foundation and current use; 5) The development of a management procedure for the South African anchovy resource; 6) How much spawning per recruit is enough?; 7) The behaviour of Flow, Fmed and Fhigh in response to variation in parameters used for their estimation; 8) The Barents Sea capelin stock collapse: a lesson to learn; 9) Variance estimates for fisheries assessment: their importance and how best to evaluate them; 10) Evaluating the accuracy of projected catch estimates from sequential population analysis and trawl survey abundance estimates; 11) Bootstrap estimates of ADAPT parameters, their projection in risk analysis and their retrospective patterns; 12) Analytical estimates of reliability for the projected yield from commercial fisheries; 13) Risk evaluation of the 10% harvest rate procedure for capelin in NAFO Division 3L; 14) Using jackknife and Monte Carlo simulation techniques to evaluate forecast models for Atlantic salmon; 15) Monte Carlo evaluation of risks for biological reference points used in New Zealand fishery assessments; 16) A comparison of event free risk analysis to Ricker spawner-recruit simulation: an example with Atlantic menhaden; 17) Choosing a management strategy for stock rebuilding when control is uncertain; 18) Risks and uncertainties in the management of a single-cohort squid fishery: the Falkland Islands Illex fishery as an example; 19) Risks of over- and under-fishing new resources; 20) Estimation of density-dependent natural mortality in British Columbia herring stocks through SSPA and its impact on sustainable harvesting strategies; 21) The comparative performance of production-model and ad hoc tuned VPA based feedback-control management procedures for the stock of Cape hake off the west coast of Africa; 22) A proposal for a threshold stock size and maximum fishing mortality rate; 23) Biological reference points for Canadian Atlantic gadoid stocks; 24) Stochastic locally-optimal harvesting; 25) ITQ based fisheries management; 26) Bioeconomic methods for determining TACs; 27) Management strategies: fixed or variable catch quotas; 28) Bioeconomic impacts of TAC adjustment strategies: a model applied to northern cod; 29) Experimental management programs for two rockfish stocks off British Columbia; 30)A brief overview of the experimental approach to reducing uncertainty in fisheries management; 31) Fisheries management organizations: a study of uncertainty.

Download or read book Theories of Scientific Method written by Robert Nola and published by Routledge. This book was released on 2014-12-18 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is it to be scientific? Is there such a thing as scientific method? And if so, how might such methods be justified? Robert Nola and Howard Sankey seek to provide answers to these fundamental questions in their exploration of the major recent theories of scientific method. Although for many scientists their understanding of method is something they just pick up in the course of being trained, Nola and Sankey argue that it is possible to be explicit about what this tacit understanding of method is, rather than leave it as some unfathomable mystery. They robustly defend the idea that there is such a thing as scientific method and show how this might be legitimated. This book begins with the question of what methodology might mean and explores the notions of values, rules and principles, before investigating how methodologists have sought to show that our scientific methods are rational. Part 2 of this book sets out some principles of inductive method and examines its alternatives including abduction, IBE, and hypothetico-deductivism. Part 3 introduces probabilistic modes of reasoning, particularly Bayesianism in its various guises, and shows how it is able to give an account of many of the values and rules of method. Part 4 considers the ideas of philosophers who have proposed distinctive theories of method such as Popper, Lakatos, Kuhn and Feyerabend and Part 5 continues this theme by considering philosophers who have proposed naturalised theories of method such as Quine, Laudan and Rescher. This book offers readers a comprehensive introduction to the idea of scientific method and a wide-ranging discussion of how historians of science, philosophers of science and scientists have grappled with the question over the last fifty years.

Download or read book An Introduction to Mathematics of Emerging Biomedical Imaging written by Habib Ammari and published by Springer Science & Business Media. This book was released on 2008-05-21 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomedical imaging is a fascinating research area to applied mathematicians. Challenging imaging problems arise and they often trigger the investigation of fundamental problems in various branches of mathematics. This is the first book to highlight the most recent mathematical developments in emerging biomedical imaging techniques. The main focus is on emerging multi-physics and multi-scales imaging approaches. For such promising techniques, it provides the basic mathematical concepts and tools for image reconstruction. Further improvements in these exciting imaging techniques require continued research in the mathematical sciences, a field that has contributed greatly to biomedical imaging and will continue to do so. The volume is suitable for a graduate-level course in applied mathematics and helps prepare the reader for a deeper understanding of research areas in biomedical imaging.