Download or read book Estimation en temps fini de syst mes non lin aires et retards avec application aux syst mes en r seau written by Kokou Anani Agbessi Langueh and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse étudie le problème d'identification de la topologie d'un réseau de systèmes complexes dynamiques, dont les sous-systèmes sont décrits par des équations différentielles ordinaires (EDO) et/ou par des équations différentielles à retard (EDR). La première partie de ce travail porte sur l'identification des paramètres du réseau de systèmes linéaires. Ainsi, différentes classes de systèmes linéaires ont été traitées, à savoir les systèmes sans retard, les systèmes à retard commensurable et les systèmes à entrées inconnues. Un observateur impulsif est proposé afin d'identifier à la fois les états et les paramètres inconnus de la classe de système dynamique considérée en temps fini. Afin de garantir l'existence de l'observateur impulsif proposé, des conditions suffisantes sont déduites. Des exemples illustratifs sont donnés afin de montrer l'efficacité de l'observateur en temps fini proposé.La deuxième partie de ce travail traite le problème de l'identification de la topologie d'un réseau de systèmes dynamiques non linéaires. Dans nos considérations, les coefficients interconnexions de la topologie du réseau sont considérés comme des paramètres constants. Par conséquent, l'identification de la topologie est équivalente à l'identification des paramètres inconnus. Tout d'abord, nous avons déduit des conditions suffisantes sur l'identifiabilité des paramètres, puis nous avons proposé un différenciateur uniforme avec convergence en temps fini pour estimer les paramètres inconnus.
Download or read book Sur la stabilisation des syst mes retard written by Dan Ivanescu and published by . This book was released on 2000 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS CE MEMOIRE ON CONSIDERE LE PROBLEME DE LA STABILISATION ET DE LA STABILITE D'UNE CLASSE DE SYSTEMES A RETARD DECRITS PAR DES EQUATIONS DIFFERENTIELLES FONCTIONNELLES. NOUS DONNONS DES CONDITIONS SUFFISANTES POUR GARANTIR LA STABILISATION, SOIT INDEPENDAMMENT SOIT EN FONCTION DE LA TAILLE DU RETARD. POUR CELA, PLUSIEURS TYPES DE LOIS DE COMMANDE ONT ETE DEVELOPPES UTILISANT DEUX APPROCHES PRINCIPALES. CECI CONSTITUE LA CONTRIBUTION THEORIQUE MAJEURE DE CE TRAVAIL. DANS LA PREMIERE PARTIE, PAR L'APPROCHE ALGEBRIQUE DE TYPE POPOV, NOUS AVONS PROPOSE UNE NOUVELLE METHODE POUR L'ANALYSE DE CES SYSTEMES. LES CRITERES DE STABILISATION DONNES (PAR RETOUR D'ETAT STATIQUE), DEPENDANTS OU NON DE LA TAILLE DU RETARD, SONT EXPRIMES EN TERMES DE FORMULES SIMPLES DE LA THEORIE DE POPOV, FORMULES QUI REVIENNENT A RESOUDRE UN SYSTEME ALGEBRIQUE ADEQUAT DE KALMAN-YAKUBOVICH-POPOV. LA DEUXIEME PARTIE COMBINE L'UTILISATION DE LA DEUXIEME METHODE DE LIAPUNOV AVEC LES TECHNIQUES DE TYPE LMI. LES RESULTATS OBTENUS CONCERNENT DANS UN PREMIER TEMPS L'EFFET DU RETARD, SUPPOSE INCONNU, SUR LA STABILISATION PAR RETOUR DE SORTIE DYNAMIQUE ET RETOUR STATIQUE DE SORTIE AVEC MEMOIRE D'UN SYSTEME A RETARD. ENSUITE, ON A ETUDIE UNE CLASSE DE SYSTEMES LINEAIRES NEUTRES. UNE ANALYSE DETAILLEE A ETE DONNEE, EN INSISTANT PLUS SUR LA STABILITE DEPENDANTE DU RETARD POUR CES SYSTEMES, ANALYSE QUI REPRESENTE UNE CONTRIBUTION INTERESSANTE DE CETTE THESE. D'UN POINT VUE PRATIQUE, NOUS AVONS ANALYSE LA STABILITE ET LA STABILISATION D'UN RESEAU ELECTRIQUE SOUS UN ANGLE SYSTEME A RETARD. LES SIMULATIONS ONT ETE FAITES SUR DEUX MODELES DE RESEAU, UN RESEAU-TEST (4 MACHINES), ET UN MODELE NON-LINEAIRE REALISTE D'UN GRAND RESEAU (29 MACHINES ET 400 ETATS).
Download or read book Estimation Non Param trique Et valuation de Performances written by COLLECTIF. and published by Omniscriptum. This book was released on 2011-05 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: On s'int resse au probl me d' valuation des performances des syst mes et r seaux, et ce en utilisant la propri t qualitative des distributions ou estimation de la densit . Sur le premier aspect, nous consid rons cinq applications, savoir: syst me de renouvellement, syst me d'attente de type GI/GI/1, syst me serveur non fiable, r seau de communication plusieurs tages Delta et r seau de files d'attente en tandem. Nous avons consid r les lois non-param triques DFR, IFR, NBU, NWU, NBUE, ... Nous avons valu les performances de ces syst mes et r seaux en obtenant des bornes inf rieures et/ou sup rieures. Ces bornes sont ensuite calcul es par simulation. Sur le second aspect, nous avons consid r le syst me d'attente GI/GI/1 et nous avons estim les densit s des distributions des temps des inter-arriv es et service par l'estimateur de Parzen-Rosenblatt adapt au cas o les chantillons sont de tailles al atoires. Nous avons obtenu la propri t statistique caract ris e par la loi du logarithme it r et nous avons valu les performances de ce syst me par simulation.
Download or read book Estimation par Intervalles des Syst mes Cyber physiques written by Djahid Rabehi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les systèmes cyber-physiques sont des intégrations intelligentes de calculateurs, de réseaux de communications, et de processus physiques. Dans cette thèse, nous travaillons dans le contexte erreur inconnue mais bornée de borne connue, et nous nous intéressons à l'estimation d'état des systèmes dynamiques sous contraintes de communication. Nous proposons des méthodes de synthèse d'observateurs par intervalles pour des systèmes linéaires à temps continu, et dont les mesures à temps discret sont transmises à travers un réseau de communication.Les contributions de cette thèse sont les suivantes: (i) nous concevons un observateur impulsif par intervalles pour des systèmes linéaires à temps continu avec des mesures sporadiques; (ii) nous proposons un observateur impulsif par intervalles avec gain L1 fini et échantillonnage contrôlé, puis, nous développons une méthode de synthèse pour concevoir simultanément le gain d'observation et la condition de contrôle de l'échantillonnage des mesures; (iii) en utilisant l'observateur impulsif par intervalles proposé dans (i), nous développons une stratégie d'estimation sécurisée pour des systèmes soumis à des cyber-attaques.
Download or read book African Small Ruminant Research and Development written by R. T. Wilson and published by ILRI (aka ILCA and ILRAD). This book was released on 1989-01-01 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 44 papers and 2 abstracts from a international conference on African small ruminants research and development. eleven papers and 1 abstract deal with the importance of small ruminant production systems and economics. Another 11 describe and analyse feed resources and feeding systems and there are 6 papers on reproductive problems and their solutions. Seven papers and 1 abstract review the prevalent health problems under various management systems and present the solutions to these production constraints. The last 9 papers deal with breeds, breeding systems and breed improvement.
Download or read book Analysis and Optimization of Systems written by Alain Bensoussan and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interaction and Market Structure written by Domenico Delli Gatti and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of essays which examine how the properties of aggregate variables are influenced by the actions and interactions of heterogenous individuals in different economic contexts. The common denominator of the essays is a critique of the representative agent hypothesis. If this hypothesis were correct, the behaviour of the aggregate variable would simply be the reproduction of individual optimising behaviour. In the methodology of the hard sciences, one of the achievements of the quantum revolution has been the rebuttal of the notion that aggregate behaviour can be explained on the basis of the behaviour of a single unit: the elementary particle does not even exist as a single entity but as a network, a system of interacting units. In this book, new tracks in economics which parallel the developments in physics mentioned above are explored. The essays, in fact are contributions to the analysis of the economy as a complex evolving system of interacting agents.
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Download or read book Recent Advances in Global Optimization written by Christodoulos A. Floudas and published by Princeton University Press. This book was released on 2014-07-14 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will present the papers delivered at the first U.S. conference devoted exclusively to global optimization and will thus provide valuable insights into the significant research on the topic that has been emerging during recent years. Held at Princeton University in May 1991, the conference brought together an interdisciplinary group of the most active developers of algorithms for global optimization in order to focus the attention of the mathematical programming community on the unsolved problems and diverse applications of this field. The main subjects addressed at the conference were advances in deterministic and stochastic methods for global optimization, parallel algorithms for global optimization problems, and applications of global optimization. Although global optimization is primarily a mathematical problem, it is relevant to several other disciplines, including computer science, applied mathematics, physical chemistry, molecular biology, statistics, physics, engineering, operations research, communication theory, and economics. Global optimization problems originate from a wide variety of mathematical models of real-world systems. Some of its applications are allocation and location problems and VLSI and data-base design problems. Originally published in 1991. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Download or read book Labour Rights as Human Rights written by Philip Alston and published by Collected Courses of the Acade. This book was released on 2005 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are efforts to protect workers' rights compatible with the forces of globalization? How can minimum standards designed to protect labour rights be implemented in a world in which national labour law is more and more at the mercy of international forces beyond its control? And does it makeany difference if we see rights such as the right to freedom of association, to non-discrimination in the workplace, to freedom from child labour, and to safe and healthy working conditions in terms of international human rights law? Or are they more appropriately seen as 'principles' to bepromoted as and where appropriate?The contributors to this volume argue that international agreements and institutions are of central importance if labour rights are to be protected in a globalized economy. But the report cards they give to the World Trade Organization, the European Union, NAFTA, and the Free Trade Agreement of theAmericas are generally very critical. While there is a strong rhetorical commitment to labour rights, at least on the part of the US and the EU, the substance of what has been achieved to date is hardly impressive. The role of the International Labour Organization is central and the authorsexplore some of the options that are open to governments, civil society, and the labour movement in the years ahead.
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 Functional Approaches to Culture and Translation written by Dirk Delabastita and published by John Benjamins Publishing. This book was released on 2006-10-31 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains a generous selection of articles on translation by Professor José Lambert (K.U. Leuven). It traces the intellectual itinerary of their author, who started out as a French and Comparative Literature scholar some four decades ago trying to get a better grip on the problem of inter-literary contacts, and who soon became a key figure in the emergent discipline of Translation Studies, where he is widely known as an indefatigable promoter of descriptively oriented research. This collection shows how José Lambert has never stopped asking new questions about the crucial but often hidden role of language and translation in the world of today. It includes some of the author’s classic papers as well as a few lesser known ones that deserve wider circulation. The editors’ introduction and the bibliography complete this thought-provoking survey of the career of one of the most creative researchers in the field.
Download or read book Metaheuristics written by Patrick Siarry and published by Springer. This book was released on 2016-12-24 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metaheuristics exhibit desirable properties like simplicity, easy parallelizability, and ready applicability to different types of optimization problems. After a comprehensive introduction to the field, the contributed chapters in this book include explanations of the main metaheuristics techniques, including simulated annealing, tabu search, evolutionary algorithms, artificial ants, and particle swarms, followed by chapters that demonstrate their applications to problems such as multiobjective optimization, logistics, vehicle routing, and air traffic management. The authors are leading researchers in this domain, with considerable teaching and applications experience, and the book will be of value to industrial practitioners, graduate students, and research academics.
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Download or read book Treaty Series Recueil Des Traites written by United Nations and published by UN. This book was released on 2007-11-02 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimal Shape Design for Elliptic Systems written by O. Pironneau and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of optimal shape design can be arrived at by asking the following question: "What is the best shape for a physical system?" This book is an applications-oriented study of such physical systems; in particular, those which can be described by an elliptic partial differential equation and where the shape is found by the minimum of a single criterion function. There are many problems of this type in high-technology industries. In fact, most numerical simulations of physical systems are solved not to gain better understanding of the phenomena but to obtain better control and design. Problems of this type are described in Chapter 2. Traditionally, optimal shape design has been treated as a branch of the calculus of variations and more specifically of optimal control. This subject interfaces with no less than four fields: optimization, optimal control, partial differential equations (PDEs), and their numerical solutions-this is the most difficult aspect of the subject. Each of these fields is reviewed briefly: PDEs (Chapter 1), optimization (Chapter 4), optimal control (Chapter 5), and numerical methods (Chapters 1 and 4).
Download or read book Properties of UO2 written by J. Belle and published by . This book was released on 1957 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
