UN NOUVEAU RESULTAT EN OPTIMISATION DE FORME, APPLICATION A UN PROBLEME A FRONTIERE LIBRE DE TYPE BERNOULLI PDF Download
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Author: MOHAMMED.. BARKATOU
Publisher:
ISBN:
Category :
Languages : fr
Pages : 95
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Book Description
DANS CETTE THESE, ON DEMONTRE UN NOUVEAU RESULTAT D'EXISTENCE DE SOLUTION POUR UNE LARGE CLASSE DE PROBLEMES D'OPTIMISATION DE FORME SOUS UNE CONTRAINTE GEOMETRIQUE PORTANT SUR LA NORMALE INTERIEURE. CE TRAVAIL EST MOTIVE PAR LA FORMULATION VARIATIONNELLE DU PROBLEME DES SURFACES DE QUADRATURE (FL) : SOIT UNE MESURE POSITIVE UPPORT COMPACT K R#N ET K > 0, ON CHERCHE UN OUVERT BORNE CONTENANT K TEL QUE LE PROBLEME SURDETERMINE SUIVANT : - U = DANS , U = 0, ET |*U| = K SUR AIT UNE SOLUTION. PLUS PRECISEMENT, ON SE DONNE UN CONVEXE COMPACT C ET ON INTRODUIT UNE PROPRIETE APPELEE LA PROPRIETE GEOMETRIQUE DE LA NORMALE (C-PGN) RELATIVEMENT A C : EN TOUT POINT DE C OU LA NORMALE INTERIEURE EXISTE, CELLE-CI RENCONTRE C. ON PROUVE ALORS QUE LA CLASSE DES OUVERTS POSSEDANT LA C-PGN EST COMPACTE POUR LA TOPOLOGIE DE HAUSDORFF ET ENSUITE QUE L'APPLICATION U# OU U#W EST LA SOLUTION DU PROBLEME DE DIRICHLET (P) - U# = DANS , U# = 0 SUR EST CONTINUE POUR LA TOPOLOGIE DE HAUSDORFF. ON EN DEDUIT L'EXISTENCE D'UN OUVERT QUI POSSEDE LA C-PGN ET MINIMISE LA FONCTIONNELLE J() = 1/2# |*U#|#2 - (,U#) + K#2/2# DX (OU U# EST LA SOLUTION DU PROBLEME (P) SUR ). ENFIN, ON CONSIDERE LE CAS OU = A##-#I#,#I##X##0# ET ON DONNE DES CONDITIONS SUFFISANTES SUR A ET K POUR QUE LE MINIMUM SOIT UNE SOLUTION DU PROBLEME (FL).
Author: MOHAMMED.. BARKATOU
Publisher:
ISBN:
Category :
Languages : fr
Pages : 95
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Book Description
DANS CETTE THESE, ON DEMONTRE UN NOUVEAU RESULTAT D'EXISTENCE DE SOLUTION POUR UNE LARGE CLASSE DE PROBLEMES D'OPTIMISATION DE FORME SOUS UNE CONTRAINTE GEOMETRIQUE PORTANT SUR LA NORMALE INTERIEURE. CE TRAVAIL EST MOTIVE PAR LA FORMULATION VARIATIONNELLE DU PROBLEME DES SURFACES DE QUADRATURE (FL) : SOIT UNE MESURE POSITIVE UPPORT COMPACT K R#N ET K > 0, ON CHERCHE UN OUVERT BORNE CONTENANT K TEL QUE LE PROBLEME SURDETERMINE SUIVANT : - U = DANS , U = 0, ET |*U| = K SUR AIT UNE SOLUTION. PLUS PRECISEMENT, ON SE DONNE UN CONVEXE COMPACT C ET ON INTRODUIT UNE PROPRIETE APPELEE LA PROPRIETE GEOMETRIQUE DE LA NORMALE (C-PGN) RELATIVEMENT A C : EN TOUT POINT DE C OU LA NORMALE INTERIEURE EXISTE, CELLE-CI RENCONTRE C. ON PROUVE ALORS QUE LA CLASSE DES OUVERTS POSSEDANT LA C-PGN EST COMPACTE POUR LA TOPOLOGIE DE HAUSDORFF ET ENSUITE QUE L'APPLICATION U# OU U#W EST LA SOLUTION DU PROBLEME DE DIRICHLET (P) - U# = DANS , U# = 0 SUR EST CONTINUE POUR LA TOPOLOGIE DE HAUSDORFF. ON EN DEDUIT L'EXISTENCE D'UN OUVERT QUI POSSEDE LA C-PGN ET MINIMISE LA FONCTIONNELLE J() = 1/2# |*U#|#2 - (,U#) + K#2/2# DX (OU U# EST LA SOLUTION DU PROBLEME (P) SUR ). ENFIN, ON CONSIDERE LE CAS OU = A##-#I#,#I##X##0# ET ON DONNE DES CONDITIONS SUFFISANTES SUR A ET K POUR QUE LE MINIMUM SOIT UNE SOLUTION DU PROBLEME (FL).
Author:
Publisher:
ISBN:
Category : Mathematics
Languages : en
Pages : 614
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Book Description
Author: DIARAF.. SECK
Publisher:
ISBN:
Category :
Languages : fr
Pages : 93
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Book Description
CETTE THESE PORTE SUR L'ETUDE D'UN PROBLEME A FRONTIERE LIBRE DE TYPE BERNOULLI. PLUS PRECISEMENT ON RECHERCHE UN DOMAINE DE FORME ANNULAIRE DE L'ESPACE A N DIMENSIONS SUR LEQUEL EXISTE UNE SOLUTION POUR UNE CERTAINE EQUATION AUX DERIVEES PARTIELLES SURDETERMINEE (C'EST-A-DIRE QUE LE GRADIENT DE LA FONCTION SOLUTION DOIT SATISFAIRE UNE CERTAINE CONDITION SUR LA FRONTIERE DU DOMAINE INCONNU). CE PROBLEME INTERVIENT DANS DE NOMBREUSES SITUATIONS PHYSIQUES (COMME, PAR EXEMPLE, LE FORMAGE ELECTROCHIMIQUE) ET A ETE BEAUCOUP ETUDIE CES DERNIERES ANNEES. DANS CE TRAVAIL, ON REPREND UNE ANCIENNE METHODE, DUE A A. BEURLING EN DIMENSION DEUX, POUR PROUVER L'EXISTENCE DE SOLUTIONS A CE PROBLEME PAR L'INTRODUCTION DE SOUS ET SUR-SOLUTIONS GEOMETRIQUES ET ON GENERALISE CETTE METHODE A LA DIMENSION N. NOUS COMPARONS ENSUITE LES SOLUTIONS QUE NOUS AVONS OBTENUE AVEC CELLES OBTENUES PAR D'AUTRES AUTEURS, COMME H.W. ALT ET L. CAFFARELLI PAR EXEMPLE. ON PROUVE AUSSI, SOUS CERTAINES HYPOTHESES, LA REGULARITE LIPSCHITZIENNE DE LA FRONTIERE LIBRE. ON S'INTERESSE EGALEMENT A L'UNICITE DE LA SOLUTION AINSI QU'A DES QUESTIONS GEOMETRIQUES COMME CERTAINES SYMETRIES OU LA CONVEXITE. ENFIN, ON DEVELOPPE UN ALGORITHME DE CALCUL DE LA SOLUTION EN DIMENSION DEUX, BASE SUR L'UTILISATION DE TRANSFORMATIONS CONFORMES, ET ON ETUDIE LA CONVERGENCE DE CET ALGORITHME
Author: E. Cela
Publisher: Springer Science & Business Media
ISBN: 1475727879
Category : Mathematics
Languages : en
Pages : 296
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Book Description
The quadratic assignment problem (QAP) was introduced in 1957 by Koopmans and Beckmann to model a plant location problem. Since then the QAP has been object of numerous investigations by mathematicians, computers scientists, ope- tions researchers and practitioners. Nowadays the QAP is widely considered as a classical combinatorial optimization problem which is (still) attractive from many points of view. In our opinion there are at last three main reasons which make the QAP a popular problem in combinatorial optimization. First, the number of re- life problems which are mathematically modeled by QAPs has been continuously increasing and the variety of the fields they belong to is astonishing. To recall just a restricted number among the applications of the QAP let us mention placement problems, scheduling, manufacturing, VLSI design, statistical data analysis, and parallel and distributed computing. Secondly, a number of other well known c- binatorial optimization problems can be formulated as QAPs. Typical examples are the traveling salesman problem and a large number of optimization problems in graphs such as the maximum clique problem, the graph partitioning problem and the minimum feedback arc set problem. Finally, from a computational point of view the QAP is a very difficult problem. The QAP is not only NP-hard and - hard to approximate, but it is also practically intractable: it is generally considered as impossible to solve (to optimality) QAP instances of size larger than 20 within reasonable time limits.
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author:
Publisher: Lulu.com
ISBN: 1430318678
Category : Reference
Languages : en
Pages : 385
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Book Description
This volume presents a catalogue of over 2000 doctoral theses by Africans in all fields of mathematics, including applied mathematics, mathematics education and history of mathematics. The introduction contains information about distribution by country, institutions, period, and by gender, about mathematical density, and mobility of mathematicians. Several appendices are included (female doctorate holders, doctorates in mathematics education, doctorates awarded by African universities to non-Africans, doctoral theses by non-Africans about mathematics in Africa, activities of African mathematicians at the service of their communities). Paulus Gerdes compiled the information in his capacity of Chairman of the African Mathematical Union Commission for the History of Mathematics in Africa (AMUCHMA). The book contains a preface by Mohamed Hassan, President of the African Academy of Sciences (AAS) and Executive Director of the Academy of Sciences for the Developing World (TWAS). (383 pp.)
Author: Vilmos Komornik
Publisher: Springer Science & Business Media
ISBN: 0387223835
Category : Computers
Languages : en
Pages : 230
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Book Description
This book is the first serious attempt to gather all of the available theory of "nonharmonic Fourier series" in one place, combining published results with new results by the authors.
Author: Yury A. Kutoyants
Publisher: Springer Science & Business Media
ISBN: 144713866X
Category : Mathematics
Languages : en
Pages : 493
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Book Description
The first book in inference for stochastic processes from a statistical, rather than a probabilistic, perspective. It provides a systematic exposition of theoretical results from over ten years of mathematical literature and presents, for the first time in book form, many new techniques and approaches.
Author: Diaraf Seck
Publisher: Birkhäuser
ISBN: 9783030573386
Category : Mathematics
Languages : en
Pages : 462
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Book Description
This book gathers nineteen papers presented at the first NLAGA-BIRS Symposium, which was held at the Cheikh Anta Diop University in Dakar, Senegal, on June 24–28, 2019. The four-day symposium brought together African experts on nonlinear analysis and geometry and their applications, as well as their international partners, to present and discuss mathematical results in various areas. The main goal of the NLAGA project is to advance and consolidate the development of these mathematical fields in West and Central Africa with a focus on solving real-world problems such as coastal erosion, pollution, and urban network and population dynamics problems. The book addresses a range of topics related to partial differential equations, geometrical analysis of optimal shapes, geometric structures, optimization and optimal transportation, control theory, and mathematical modeling.
Author: Anastasios Tsiatis
Publisher: Springer Science & Business Media
ISBN: 0387373454
Category : Mathematics
Languages : en
Pages : 392
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Book Description
This book summarizes current knowledge regarding the theory of estimation for semiparametric models with missing data, in an organized and comprehensive manner. It starts with the study of semiparametric methods when there are no missing data. The description of the theory of estimation for semiparametric models is both rigorous and intuitive, relying on geometric ideas to reinforce the intuition and understanding of the theory. These methods are then applied to problems with missing, censored, and coarsened data with the goal of deriving estimators that are as robust and efficient as possible.
