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Synthese De Regulateurs Robustes Pour Les Systemes Lineaires Incertains
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Book Synopsis Synthèse de régulateurs robustes pour les systèmes linéaires incertains by : Mohammed Al Hamid
Download or read book Synthèse de régulateurs robustes pour les systèmes linéaires incertains written by Mohammed Al Hamid and published by . This book was released on 1996 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE CONCERNE LA SYNTHESE D'UNE COMMANDE ROBUSTE GARANTISSANT LA STABILITE ROBUSTE, EN BOUCLE FERMEE, POUR LES SYSTEMES LINEAIRES INCERTAINS. LA STRATEGIE DE COMMANDE UTILISEE EST LA METHODE DE LA COMMANDE LINEAIRE QUADRATIQUE (LQ). LA RECHERCHE D'UNE COMMANDE LINEAIRE QUADRATIQUE ROBUSTE EST ALORS EQUIVALENTE A LA RECHERCHE DE CONDITIONS NECESSAIRES ET/OU SUFFISANTES POUR LA STABILISABILITE QUADRATIQUE DES SYSTEMES INCERTAINS. L'APPROCHE QUE NOUS AVONS CHOISIE EST UNE APPROCHE TEMPORELLE DE TYPE LYAPUNOV. LA REPRESENTATION CONSIDEREE DES SYSTEMES SE SITUE DANS L'ESPACE D'ETAT. DURANT NOTRE ETUDE, NOUS CONSIDERONS LE CAS OU L'INCERTITUDE EST DU TYPE DIT INCERTITUDE BORNEE EN VALEUR. NOUS AVONS EXPOSE L'ANALYSE DE LA ROBUSTESSE D'UNE COMMANDE LQ ET LES LIMITES DE SES PROPRIETES DE ROBUSTESSE EN PRESENCE DES PERTURBATIONS. NOUS AVONS DONNE DES CONDITIONS SUFFISANTES POUR QUE LA COMMANDE, CALCULEE POUR LE MODELE NOMINAL, TOLERE UN TEL TYPE DE PERTURBATION. EN SUITE, NOUS AVONS ETABLIT UNE METHODE DE SYNTHESE DE REGULATEURS ROBUSTES PAR RETOUR D'ETAT. LORSQUE LES VARIABLES D'ETAT NE SONT PAS CONNUES, NOUS ESTIMONS CES VARIABLES PAR UN OBSERVATEUR BASE SUR LE MODELE NOMINAL. LE GAIN DE CET OBSERVATEUR EST CALCULE EN TENANT COMPTE DE L'INCERTITUDE. CETTE ETUDE A ETE ETABLIE AUSSI BIEN POUR LES SYSTEMES A TEMPS CONTINU QUE POUR LES SYSTEMES A TEMPS DISCRET.
Download or read book Control of Industrial Systems written by and published by . This book was released on 1997 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ROBUSTESSE EN PERFORMANCE DES SYSTEMES LINEAIRES INCERTAINS by : JAMAL.. DAAFOUZ
Download or read book ROBUSTESSE EN PERFORMANCE DES SYSTEMES LINEAIRES INCERTAINS written by JAMAL.. DAAFOUZ and published by . This book was released on 1997 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE S'INSCRIT DANS LA MOUVANCE DES TRAVAUX RELATIFS A LA SYNTHESE DE LOIS DE COMMANDES ROBUSTES PERMETTANT DE CONFERER AU SYSTEME COMMANDE UN CERTAIN NIVEAU DE PERFORMANCE. ON CONSIDERE ESSENTIELLEMENT DES SYSTEMES LINEAIRES DECRITS DANS L'ESPACE D'ETAT ET SOUMIS A DES INCERTITUDES PARAMETRIQUES. LA ROBUSTESSE EN STABILITE EST ENVISAGEE A RAVERS LE CONCEPT DE STABILISABILITE QUADRATIQUE. LA PERFORMANCE QUANT A ELLE EST ABORDEE DANS DEUX DIRECTIONS. LA PREMIERE EST UNE GENERALISATION AU CAS DES SYSTEMES INCERTAINS DU PROBLEME DE REJET DE PERTURBATION H#2. IL S'AGIT DE MINIMISER UNE BORNE SUPERIEURE DE LA NORME H#2 DE LA MATRICE DE TRANSFERT ENTRE UNE PERTURBATION EXOGENE ET UNE SORTIE CONTROLEE. LA LOI DE COMMANDE OBTENUE EST QUALIFIEE, DANS CE CAS, DE COMMANDE A COUT GARANTI. LA DEUXIEME EST FONDEE SUR LE PLACEMENT DE POLES. EN PRESENCE DE L'INCERTITUDE, ET CONTRAIREMENT AU CAS DES SYSTEMES PARFAITEMENT CONNU, UNE LOCALISATION DES POLES NE PEUT SE FAIRE QUE DANS UNE REGION DU PLAN COMPLEXE ET NON EN DES POINTS BIEN DEFINIS. POUR DES RAISONS D'EFFICACITE, MAIS AUSSI LIEES A DES ASPECTS PUREMENT PRATIQUES, LA REGION DE PLACEMENT CHOISIE EST UN DISQUE. SONT ALORS DEVELOPPEES DES TECHNIQUES PERMETTANT DE LOCALISER LES POLES DANS UN DISQUE, TECHNIQUES VALABLES AUSSI BIEN POUR LES SYSTEMES A TEMPS CONTINU QU'A TEMPS DISCRET. EN OUTRE, LORSQUE LE SYSTEME PRESENTE EN PLUS DE L'INCERTITUDE PARAMETRIQUE, UNE INCERTITUDE LIEE AUX DYNAMIQUES RAPIDES NEGLIGEES, LE PROBLEME DE ROBUSTESSE EN PERFORMANCE EST ABORDE A TRAVERS L'UTILISATION DE LA MODELISATION SOUS FORME DE SYSTEMES SINGULIEREMENT PERTURBES INCERTAINS. L'EFFICACITE DES CONCEPTS ET DES OUTILS NUMERIQUES PRESENTES DANS CETTE THESE EST MISE EN EVIDENCE SUR DEUX APPLICATIONS : LA COMMANDE D'UN BRAS MANIPULATEUR SOUPLE ET LA SYNTHESE D'UNE LOI DE PILOTAGE.
Book Synopsis COMMANDE DES SYSTEMES LINEAIRES INCERTAINS by : Olivier Bachelier
Download or read book COMMANDE DES SYSTEMES LINEAIRES INCERTAINS written by Olivier Bachelier and published by . This book was released on 1998 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL TRAITE DE LA RECHERCHE DE PERFORMANCES POUR LES SYSTEMES MULTIVARIABLES A MODELES D'ETAT LINEAIRES INCERTAINS ET UTILISE LE CONCEPT DE D-STABILITE ROBUSTE. LES MODELES SONT INVARIANTS DANS LE TEMPS MAIS UNE INCERTITUDE ADDITIVE E SUR LA MATRICE D'ETAT A EST CONSIDEREE. LES PERFORMANCES ENVISAGEES CONCERNENT LE REGIME TRANSITOIRE DES REPONSES DU SYSTEME (TEMPS DE REPONSE, AMORTISSEMENT) ET SONT LIEES AUX VALEURS PROPRES DE A. ON PEUT SOUHAITER QU'ELLES SOIENT LOCALISEES DANS UNE REGION D DU PLAN COMPLEXE. ON DIT ALORS QUE A EST D-STABLE. CETTE PROPRIETE EST NUMERIQUEMENT TESTABLE. MALHEUREUSEMENT, CETTE LOCALISATION EST ALTEREE PAR LA PRESENCE DE L'INCERTITUDE ET LE TEST DEVIENT IMPOSSIBLE POUR A + E. C'EST POURQUOI L'ON CHERCHE A ETABLIR DES BORNES DE ROBUSTESSE OU BORNES DE D-STABILITE ROBUSTE SUR LE DOMAINE D'INCERTITUDE GARANTISSANT QUE LA D-STABILITE DE A + E EST PRESERVEE. LA PREMIERE PHASE DE LA THESE TRAITE DE LA RECHERCHE DE BORNES DEDUITES D'APPROCHES CLASSIQUES (LYAPUNOV ET LOGARITHMIQUE) ET COMPLETE DES RESULTATS EXISTANTS. AFIN D'ELARGIR LE CHOIX DES REGIONS, UNE NOUVELLE APPROCHE EST ENVISAGEE (DITE LMI POUR LINEAR MATRIX INEQUALITY) PERMETTANT D'OBTENIR DES BORNES DE D-STABILITE ROBUSTE RELATIVES A DES REGIONS D NON CONNEXES. LA SECONDE PHASE DU TRAVAIL UTILISE CES BORNES LMI POUR CALCULER DES LOIS DE COMMANDE ROBUSTE. L'IDEE EST D'AMELIORER LA ROBUSTESSE D'UN PLACEMENT DE POLES EN MAXIMISANT UNE BORNE. CE PROBLEME EST RESOLU DE MANIERE HEURISTIQUE PAR LE BIAIS D'OPERATEURS GENETIQUES.
Book Synopsis Multimodèles en automatique by : CHADLI Mohammed
Download or read book Multimodèles en automatique written by CHADLI Mohammed and published by Lavoisier. This book was released on 2012-06-01 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pour représenter au mieux le fonctionnement dynamique d'un processus, une approche globale basée sur de multiples modèles LTI (linéaires ou affines) autour de différents points de fonctionnement est utilisée. Cette approche multimodèle est une représentation polytopique convexe pouvant être obtenue, soit directement à partir d'un modèle mathématique non linéaire, soit par transformation mathématique, soit par linéarisation autour de différents points de fonctionnement. Basé essentiellement sur la deuxième méthode de Lyapunov et la formulation LMI, Multimodèles en automatique se concentre sur l'analyse de la stabilité et la synthèse de correcteurs/observateurs. Le cas des multimodèles incertains avec des entrées inconnues est étudié et les fonctions de Lyapunov quadratiques et non quadratiques sont également considérées. Afin de réduire le pessimisme de la méthode quadratique, l'étude de stabilité des multimodèles est réalisée en considérant des fonctions de Lyapunov non quadratiques.
Book Synopsis Integrated Coastal Zone Management of Coral Reefs by : Kent Gustavson
Download or read book Integrated Coastal Zone Management of Coral Reefs written by Kent Gustavson and published by World Bank Publications. This book was released on 2000 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The applied research indicates that, to improve awareness, park education programs should be targeted specifically to the user groups primarily through outreach programs. Further, the Park's management programs should be highlighted, particularly the beneficial, tangible products and services (benefits) the Park provides to each user group... The closer the tie between reef conditions and business earnings, the greater the users' support for reef conservation." Coral reefs are sometimes referred to as "canaries of the sea" because of their early warning ability to show near-shore oceanic stress. Because of their biological diversity, they are also called "rainforests of the sea." Coral reefs are vital to the well being of millions of people. Coral reef managers and government officials trying to save their valuable national resources have turned to research on coral reefs for help. The research presented in this publication merits a great deal of notice because the output is useful for decision support and training tools in integrated coastal zone management (ICZM). The work on cost-effectiveness analysis has developed integrated economic and ecological models, relying extensively on fuzzy logic procedures to model impacts and effects of interventions within the reef environment. By contrast, the marine system valuation work provides economic valuations of coral reefs, demonstrating the use of different modeling methods and treating key policy issues within this context. This publication will interest coastal zone experts and managers worldwide
Book Synopsis Positive Polynomials in Control by : Didier Henrion
Download or read book Positive Polynomials in Control written by Didier Henrion and published by Springer Science & Business Media. This book was released on 2005-01-14 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Positive Polynomials in Control originates from an invited session presented at the IEEE CDC 2003 and gives a comprehensive overview of existing results in this quickly emerging area. This carefully edited book collects important contributions from several fields of control, optimization, and mathematics, in order to show different views and approaches of polynomial positivity. The book is organized in three parts, reflecting the current trends in the area: 1. applications of positive polynomials and LMI optimization to solve various control problems, 2. a mathematical overview of different algebraic techniques used to cope with polynomial positivity, 3. numerical aspects of positivity of polynomials, and recently developed software tools which can be employed to solve the problems discussed in the book.
Book Synopsis UNESCO General History of Africa, Vol. I, Abridged Edition by : Jacqueline Ki-Zerbo
Download or read book UNESCO General History of Africa, Vol. I, Abridged Edition written by Jacqueline Ki-Zerbo and published by Univ of California Press. This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume covers the period from the end of the Neolithic era to the beginning of the seventh century of our era. This lengthy period includes the civilization of Ancient Egypt, the history of Nubia, Ethiopia, North Africa and the Sahara, as well as of the other regions of the continent and its islands."--Publisher's description
Book Synopsis Geometric and Numerical Foundations of Movements by : Jean-Paul Laumond
Download or read book Geometric and Numerical Foundations of Movements written by Jean-Paul Laumond and published by Springer. This book was released on 2017-05-02 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book aims at gathering roboticists, control theorists, neuroscientists, and mathematicians, in order to promote a multidisciplinary research on movement analysis. It follows the workshop “ Geometric and Numerical Foundations of Movements ” held at LAAS-CNRS in Toulouse in November 2015[1]. Its objective is to lay the foundations for a mutual understanding that is essential for synergetic development in motion research. In particular, the book promotes applications to robotics --and control in general-- of new optimization techniques based on recent results from real algebraic geometry.
Book Synopsis Crying Out for Change by : Deepa Narayan-Parker
Download or read book Crying Out for Change written by Deepa Narayan-Parker and published by World Bank Publications. This book was released on 2000 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multi-country research initiative to understand poverty from the eyes of the poor, the Voices of the Poor project was undertaken to inform the World Bank's activities and the upcoming World Development Report 2000/01. The research findings are being published in three books: "Can Anyone Hear Us?" gathers the voices of over 40,000 poor women and men in 50 countries from the World Bank's participatory poverty assessments (Deepa Narayan, Raj Patel, Kai Schafft, Anne Rademacher, and Sarah Koch-Schulte, authors). "Crying Out for Change" pulls together new field work conducted in 1999 in 23 countries (Deepa Narayan, Robert Chambers, Meera Shah, and Patti Petesch, authors). "From Many Lands" offers regional patterns and country case-studies (Deepa Narayan and Patti Petesch, editors). Voices of the Poor marks the first time such an exercise has been undertaken in so many developing countries and transition economies around the world. It provides a unique and detailed picture of the life of the poor and explains the constraints poor people face to escape from poverty in a way that more traditional survey techniques do not capture well. Each of the three volumes demonstrates the importance of voice and power in poor people's definition of poverty. Voices of the Poor concludes that we need to expand our conventional views of poverty which focus on income expenditure, education, and health to include measures of voice and empowerment.
Book Synopsis Amongst Mathematicians by : Elena Nardi
Download or read book Amongst Mathematicians written by Elena Nardi and published by Springer Science & Business Media. This book was released on 2008 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a unique perspective on ways in which mathematicians: perceive their students' learning; teach; reflect on their teaching practice. Elena Nardi achieves this by employing two fictional, yet entirely data-grounded, characters to create a conversation on these important issues. The construction of these characters is based on large bodies of data including intense focused group interviews with mathematicians and extensive analyses of students' written work, collected and analyzed over a substantial period.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251045411 Total Pages :20 pages Book Rating :4.0/5 (454 download)
Book Synopsis What is the Code of Conduct for Responsible Fisheries? by : Food and Agriculture Organization of the United Nations
Download or read book What is the Code of Conduct for Responsible Fisheries? written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2001 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: The actual Code of conduct is also available (1996) (ISBN 9251038341).
Download or read book MEGA-CRISES written by Ira Helsloot and published by Charles C Thomas Publisher. This book was released on 2012-08-01 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: We live in turbulent times with continents and nations facing ever-heightening risks such as natural disasters, intense and protracted conflicts, terrorism, corporate crises, cyber threats to infrastructures and mega-events. We are witnessing the rise of mega-crises and a new class of adversity with many unknowns. The prospect of mega-crises presents professionals and students in the field of crisis management with four major tasks. First, they should engage in “deep thinking” about the causes of the increasing occurrence of mega-crises. Second, they should identify and work through the dominant trends which complicate contemporary crisis management. Third, they should upgrade institutional crisis management capacity. Fourth, they should improve societal resilience since no institutional complex can mitigate or manage these mega-crisis on its own. This book is divided into four primary parts, each of which looks at one facet of mega-crises. Part I focuses on the concept of a mega-crisis and mega-crisis management; Part II examines crisis management of mega-natural disasters; Part III evaluates crisis management of man-made mega-crises; and Part IV identifies mega-threats and vulnerabilities. Additional major topics include Hurricane Katrina; Hurricane Gustav; the London Bombings; the Mumbai Terrorist Attacks of July 7, 2005; corporate meltdowns; the subprime crisis; the Olympic Games; electricity grids; global climate change; the Dutch Delta; risks to food security; and mega-crises and the Internet. This comprehensive text will provide practitioners and academics with the results of an across-the-board research effort in the prospects, nature, characteristics, and the effects of mega-crises.
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.
Download or read book Biomimicry written by Janine M. Benyus and published by Harper Collins. This book was released on 2009-08-11 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Repackaged with a new afterword, this "valuable and entertaining" (New York Times Book Review) book explores how scientists are adapting nature's best ideas to solve tough 21st century problems. Biomimicry is rapidly transforming life on earth. Biomimics study nature's most successful ideas over the past 3.5 million years, and adapt them for human use. The results are revolutionizing how materials are invented and how we compute, heal ourselves, repair the environment, and feed the world. Janine Benyus takes readers into the lab and in the field with maverick thinkers as they: discover miracle drugs by watching what chimps eat when they're sick; learn how to create by watching spiders weave fibers; harness energy by examining how a leaf converts sunlight into fuel in trillionths of a second; and many more examples. Composed of stories of vision and invention, personalities and pipe dreams, Biomimicry is must reading for anyone interested in the shape of our future.
Book Synopsis Handbook for Integrating Risk Analysis in the Economic Analysis of Projects by : Asian Development Bank
Download or read book Handbook for Integrating Risk Analysis in the Economic Analysis of Projects written by Asian Development Bank and published by . This book was released on 2002 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aiming to support the development of a framework for the analysis of risk in project design and economic analysis, this handbook outlines technical approaches to modeling risk. Also summarized is the nature and practice of sensitivity analysis in dealing with uncertain outcomes as well as the principles to consider in typical risk analysis situations sector by sector. Case studies are included to demonstrate the application of quantitative risk analysis using actual Asian Development Bank projects to help improve project design and quality. Handbook users will learn to identify factors that are the key determinants of project outcomes, determine the likelihood of an individual project's returns being unacceptable, and design measures to mitigate the risks arising from the identified key factors.
Book Synopsis Genericity In Polynomial Optimization by : Tien Son Pham
Download or read book Genericity In Polynomial Optimization written by Tien Son Pham and published by World Scientific. This book was released on 2016-12-22 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: In full generality, minimizing a polynomial function over a closed semi-algebraic set requires complex mathematical equations. This book explains recent developments from singularity theory and semi-algebraic geometry for studying polynomial optimization problems. Classes of generic problems are defined in a simple and elegant manner by using only the two basic (and relatively simple) notions of Newton polyhedron and non-degeneracy conditions associated with a given polynomial optimization problem. These conditions are well known in singularity theory, however, they are rarely considered within the optimization community.Explanations focus on critical points and tangencies of polynomial optimization, Hölderian error bounds for polynomial systems, Frank-Wolfe-type theorem for polynomial programs and well-posedness in polynomial optimization. It then goes on to look at optimization for the different types of polynomials. Through this text graduate students, PhD students and researchers of mathematics will be provided with the knowledge necessary to use semi-algebraic geometry in optimization.
