Download or read book MODELISATION ET COMMANDE DE PROCESSUS PAR DES METHODES NEURONALES ET FLOUES written by ELIZABETH.. MARGAGLIO and published by . This book was released on 1999 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA DISTILLATION EST UN PROCEDE TRES IMPORTANT DANS L'INDUSTRIE CHIMIQUE ET PETROCHIMIQUE. SA MODELISATION ET SA COMMANDE NE SONT PAS DES TACHES FACILES A REALISER, CAR IL S'AGIT D'UN PROCEDE TRES COMPLEXE EN RAISON DE SES NON-LINEARITES ET DE SA NATURE MULTIVARIABLE ; EN OUTRE, IL EST SOUMIS A DE NOMBREUSES PERTURBATIONS ET A DES CONTRAINTES. DANS CE TRAVAIL NOUS ETUDIONS L'APPLICATION DES RESEAUX DE NEURONES ET DES SYSTEMES D'INFERENCE FLOUE (SIF) A LA COMMANDE DE PROCEDES DE DISTILLATION. NOUS TRAITONS PRINCIPALEMENT DEUX PROBLEMES, A SAVOIR, LA COMMANDE MULTIVARIABLE DES COMPOSITIONS DES PRODUITS EN COLONNES OPERANT EN CONTINU ET LA COMMANDE OPTIMALE EN COLONNES OPERANT EN DISCONTINU. POUR LE PROBLEME DE COMMANDE MULTIVARIABLE DES COLONNES CONTINUES, NOUS UTILISONS DES RESEAUX DE NEURONES POUR LA MODELISATION ET DES SIF POUR LA COMMANDE. TOUT D'ABORD, NOUS REALISONS UNE COMPARAISON ENTRE PLUSIEURS TYPES DE RESEAUX RECURRENTS EN FONCTION DE LEURS STRUCTURES ET D'UN POINT DE VUE D'IDENTIFICATION DE SYSTEMES. ENSUITE NOUS UTILISONS LE PLUS APPROPRIE POUR LA MODELISATION INVERSE DU PROCEDE DE DISTILLATION. CE MODELE INVERSE EST UTILISE COMME PREDICTEUR DANS UN SCHEMA DE COMMANDE PREDICTEUR-CORRECTEUR. LE CORRECTEUR EST IMPLEMENTE PAR DES SIF, DONT LES PARAMETRES SONT ADAPTES A L'AIDE D'UN ALGORITHME DE DESCENTE DE GRADIENT. L'UTILISATION DE CE SCHEMA PRODUIT UNE AMELIORATION DES REPONSES DU SYSTEME AUX CHANGEMENTS DE CONSIGNE ET AUX PERTURBATIONS. POUR LE PROBLEME DE COMMANDE OPTIMALE DES COLONNES DISCONTINUES, NOUS UTILISONS LES SIF ET NOUS ADAPTONS LEURS PARAMETRES AU MOYEN D'UN ALGORITHME D'APPRENTISSAGE PAR RENFORCEMENT, LE Q-LEARNING FLOU. A NOTRE CONNAISSANCE, L'APPLICATION DE CETTE METHODE POUR RESOUDRE DES PROBLEMES DE COMMANDE OPTIMALE EN COLONNES DE DISTILLATION DISCONTINUE N'A PAS ETE ABORDEE JUSQU'A PRESENT. NOUS TRAITONS DIFFERENTS PROBLEMES DE COMMANDE OPTIMALE SUR PLUSIEURS PROCEDES DE DISTILLATION SIMULES AINSI QUE SUR UN PROCEDE REEL. NOUS AVONS OBTENU DE BONS RESULTATS AVEC L'AVANTAGE SUPPLEMENTAIRE D'UNE GRANDE SIMPLICITE DE MISE EN UVRE, L'ALGORITHME S'ADAPTANT TRES BIEN A CE TYPE DE PROBLEMES.
Download or read book Mod lisation et commande intelligentes de syst mes dynamiques written by Fathi Fourati and published by Connaissances & Savoirs. This book was released on 2017-03-24 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce livre "Modélisation et commande intelligentes de systèmes complexes" s'adresse aux étudiants en masters, étudiants ingénieurs, chercheurs et doctorants du domaine de commande automatique des systèmes. Le contenu du livre est destiné au public qui a étudié la matière de systèmes asservis linéaires continus et discrets. Il constitue un guide d'utilisation et de programmation de différents types de réseaux neuronaux pour réaliser des modélisations et des stratégies de commandes neuronales et neuro-floues de systèmes complexes. Ces systèmes peuvent être multivariables, non linéaires, stochastiques et/ou non stationnaires dont la commande automatique classique s'avère difficile à implémenter.
Download or read book Approche neuronale de la repr sentation et de la commande multimod les de processus complexes written by Nesrine Elfelly and published by . This book was released on 2010 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux présentés dans ce mémoire portent sur la représentation et la commande multimodèles de processus complexes. L'approche envisagée, essentiellement basée sur des techniques de classification neuro-floues, vise à établir une base de modèles décrivant le système dans l'ensemble de son espace de fonctionnement en se servant seulement des mesures de type entrée/sortie. L'implémentation de cette approche nécessite trois étapes principales :(1) détermination de la structure multimodèle, pour laquelle le nombre de modèles est tout d'abord selectionné en utilisant un réseau de neurones à apprentissage compétitif pénalisant le rival. Les différentes classes de fonctionnement sont ensuite déterminées en se servant d'un algorithme de classification adéquat (carte de Kohonen, K-moyennes ou K-moyennes floues),(2) identification paramétrique des modèles basée sur les résultats de la classification et une procédure de validation dont l'objectif est de confirmer l'efficacité de la structure multimodèle proposée en faisant intervenir un mécanisme de décision convenable permettant l'estimation de la contribution (ou validité) de chaque modèle,(3) calcul des paramètres du contrôleur global du système à travers une fusion entre les paramètres des commandes partielles associées aux différents modèles de la base.L’approche suggérée se distingue essentiellement par son aspect général et pratique dans la mesure où elle est simple à mettre en œuvre, ne nécessite aucune connaissance a priori et propose d’adapter le traitement en choisissant les méthodes adéquates de classification et de calcul des validités, suivant certains aspects de l’espace de fonctionnement du processus considéré.
Download or read book Neural Networks written by Gérard Dreyfus and published by Springer Science & Business Media. This book was released on 2005-11-25 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural networks represent a powerful data processing technique that has reached maturity and broad application. When clearly understood and appropriately used, they are a mandatory component in the toolbox of any engineer who wants make the best use of the available data, in order to build models, make predictions, mine data, recognize shapes or signals, etc. Ranging from theoretical foundations to real-life applications, this book is intended to provide engineers and researchers with clear methodologies for taking advantage of neural networks in industrial, financial or banking applications, many instances of which are presented in the book. For the benefit of readers wishing to gain deeper knowledge of the topics, the book features appendices that provide theoretical details for greater insight, and algorithmic details for efficient programming and implementation. The chapters have been written by experts and edited to present a coherent and comprehensive, yet not redundant, practically oriented introduction.
Download or read book Mod lisation de syst mes flous written by Riad Hartani and published by . This book was released on 1995 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse constitue une investigation de la modélisation de systèmes flous et de l'intégration des techniques floues et neuronales. Elle propose aussi des solutions originales utilisant ces approches pour la résolution de deux problèmes : la régulation de trafic de lignes de métro automatisées et la modélisation d'expressions faciales. Une première partie théorique comporte deux volets. Le premier vise à analyser certains fondements mathématiques relatifs aux systèmes flous. Ainsi, on se situe dans le contexte de l'approximation universelle de fonctions afin d'analyser les capacités des systèmes flous. L'intérêt applicatif des propriétés analysées est mis en évidence. Le second volet propose des solutions à des problèmes liés à la modélisation et l'identification des systèmes flous. Une démarche générale pour leur modélisation y est présentée. Dans ce cadre, différentes contributions sont apportées aussi bien pour l'identification de la structure externe du système flou, que pour l'identification de la structure interne, utilisant les propriétés d'apprentissage des techniques neuronales. Une seconde partie applicative analyse deux problématiques. Le premier aspect rentre dans le cadre de la conception de systèmes d'aide à la décision et concerne le problème de la régulation de lignes de métro automatisées. Un modèle générique et évolutif pour la régulation utilisant les techniques neurofloues est élaboré. Le modèle obtenu est testé et validé sur différentes lignes de métro. Le second aspect se situe dans le contexte de la modélisation de processus de perception humaine et propose l'utilisation de systèmes flous pour la représentation d'expressions faciales humaines et le raisonnement sur la transition entre expressions faciales. Nous présentons les différentes étapes de la modélisation floue proposée et discutons ces performances.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Dynamique Non lin aire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eye Movements and Their Role in Visual and Cognitive Processes written by Eileen Kowler and published by Elsevier Publishing Company. This book was released on 1990 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book to deal exclusively with oculomotor performance in a series that, up to this point, has been devoted largely to reviews of research on oculomotor anatomy and physiology. The publication of this volume signifies the recognition of the fact that a genuine understanding of eye movement will not come about through the study of neurons alone. We need to know about the capacity to make different kinds of eye movement, and about how such oculomotor capacity is used to accomplish different sorts of visual and cognitive tasks, i.e. how the eye can move and why it moves in particular ways. Research on respective topics was critically evaluated by the contributing authors, resulting in a controversial and up-to-date appraisal of this subject.
Download or read book Vergence Eye Movements written by Clifton M. Schor and published by Butterworth-Heinemann. This book was released on 1983 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CIKM 13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.
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.
Download or read book Notional Syllabuses written by David Arthur Wilkins and published by Oxford University Press, USA. This book was released on 1976 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a framework of categories for the construction of notional syllabuses and justification for a notional syllabus. Also explores the role of a notional syllabus in various types of language learning situations.
Download or read book Routledge International Handbook of Ignorance Studies written by Matthias Gross and published by Routledge. This book was released on 2015-05-15 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once treated as the absence of knowledge, ignorance today has become a highly influential topic in its own right, commanding growing attention across the natural and social sciences where a wide range of scholars have begun to explore the social life and political issues involved in the distribution and strategic use of not knowing. The field is growing fast and this handbook reflects this interdisciplinary field of study by drawing contributions from economics, sociology, history, philosophy, cultural studies, anthropology, feminist studies, and related fields in order to serve as a seminal guide to the political, legal and social uses of ignorance in social and political life. Chapter 33 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license available here: https://tandfbis.s3-us-west-2.amazonaws.com/rt-files/docs/Open+Access+Chapters/9780415718967_oachapter33.pdf
Download or read book All it Is It s a Carnival written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Working with the Anthropological Theory of the Didactic in Mathematics Education written by Marianna Bosch and published by Routledge. This book was released on 2019-10-23 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the main research veins developed within the framework of the Anthropological Theory of the Didactic (ATD), a paradigm that originated in French didactics of mathematics. While a great number of publications on ATD are available in French and Spanish, Working with the Anthropological Theory of the Didactic in Mathematics Education is the first directed at English-speaking international audiences. Written and edited by leading researchers in ATD, the book covers all aspects of ATD theory and practice, including teaching applications. The chapters feature the most relevant and recent investigations presented at the 6th international conference on the ATD, offering a unique opportunity for an international audience interested in the study of mathematics teaching and learning to keep in touch with advances in educational research. The book is divided into four sections and the contributions explore key topics such as: The core concept of ‘praxeology’, including its development and functionalities The need for new teaching praxeologies in the paradigm of questioning the world The impact of ATD on the teaching profession and the education of teachers This is the second volume in the New Perspectives on Research in Mathematics Education. This comprehensive casebook is an indispensable resource for researchers, teachers and graduate students around the world.
Download or read book Topics on Perfect Graphs written by V. Chvátal and published by Elsevier. This book was released on 1984-11-01 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to present selected results on perfect graphs in a single volume. These take the form of reprinted classical papers, survey papers or new results.
Download or read book The Teaching and Learning of Mathematics at University Level written by Derek Holton and published by Springer Science & Business Media. This book was released on 2001-09-30 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a text that contains the latest in thinking and the best in practice. It provides a state-of-the-art statement on tertiary teaching from a multi-perspective standpoint. No previous book has attempted to take such a wide view of the topic. The book will be of special interest to academic mathematicians, mathematics educators, and educational researchers. It arose from the ICMI Study into the teaching and learning of mathematics at university level (initiated at the conference in Singapore, 1998).
