Download or read book CONTRIBUTION A L AMELIORATION DE LA REACTIVITE DES SYSTEMES DE PRODUCTION AUTOMATISES ET FLEXIBLES GRACE A UN PILOTAGE BASE SUR UNE GENERATION DE TACHES DECENTRALISEE written by NICOLAS.. BROISSIN and published by . This book was released on 1999 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACTUELLEMENT, LE PILOTAGE D'UN SYSTEME DE PRODUCTION AUTOMATISE ET FLEXIBLE (SPAF) EST PRINCIPALEMENT ENVISAGE SOUS LA PROBLEMATIQUE DE L'ALLOCATION DE TACHES PRE GENEREES (FONCTION D'ORDONNANCEMENT), C'EST-A-DIRE PROGRAMMEES HORS LIGNE ET ATTRIBUEES A UN TYPE PREDEFINI DE MDP. AUJOURD'HUI, UNE PARTIE DES TRAVAUX SCIENTIFIQUES CONTINUENT SUR CES BASES. CEPENDANT, LES APPROCHES LES PLUS PERFORMANTES EN TERME DE REACTIVITE (ORDONNANCEMENT TEMPS-REEL, REACTIF OU AGILE) PRESENTENT LE DEFAUT MAJEUR DE NE CONSIDERER QUE LES ASPECTS TEMPORELS ET NON REELLEMENT LES ASPECTS TECHNOLOGIQUES DE LA TACHE MACHINE. CECI IMPLIQUE QUE LES CHOIX SUR L'AFFECTATION DES TACHES SE FONT SANS CONSIDERER TOUTES LES OCCURRENCES D'ATTRIBUTIONS, ET NOTAMMENT LES RESSOURCES QUI CONVIENDRAIENT POUR EXECUTER LA TACHE MAIS DONT LES CARACTERISTIQUES TECHNOLOGIQUES SONT INCOMPATIBLES AVEC LES CHOIX TECHNOLOGIQUES FAIT LORS DE LA PROGRAMMATION DE LA TACHE. L'ORIGINALITE DE NOTRE APPROCHE EST D'ENVISAGER LE PILOTAGE D'UN SPAF EN DECENTRALISANT LA GENERATION DES TACHES SUR LES MDP ET EN RETARDANT AU MAXIMUM LES CHOIX D'ALLOCATION ET D'ATTRIBUTION DE TACHES. DEUX NOTIONS LOCALES AUX MDP SUPPORTENT CETTE LOGIQUE DE PILOTAGE. LA PREMIERE, LA GENERATION REFLEXE, BASEE SUR UNE MODELISATION METIER DU COMPORTEMENT, PRODUIT EN-LIGNE, UNE TACHE DECRITE A UN NIVEAU INTERPRETABLE PAR LES SOUS-COUCHES DE LA COMMANDE. LA DEUXIEME, LA GENERATION REFLECHIE, PERMET D'ASSURER EN-LIGNE L'AFFECTATION DES TACHES PAR LA MISE EN CONCURRENCE DES MDP LORSQU'UNE NOUVELLE TACHE DOIT ETRE EXECUTEE. NOUS PRESENTONS A LA FIN DE CE MEMOIRE UNE VALIDATION DES CONCEPTS DE GENERATION DE TACHES MULTI-MACHINES A TRAVERS L'ANALYSE DETAILLEE DES RESULTATS DE SIMULATION OBTENUS SUR UNE MAQUETTE DE SIMULATION DU PILOTAGE D'UNE CELLULE FLEXIBLE DE TOURNAGE. NOUS PRESENTONS EGALEMENT BRIEVEMENT L'APPLICATION DE CES CONCEPTS A D'AUTRES TYPES DE SPAF COMME LES SYSTEMES DE TRANSPORT OU DE STOCKAGE ROBOTISES.

Download or read book Contribution l am lioration de la r activit dans les syst mes de production notamment par la mise en oeuvre des concepts de d centralisation des fonctions de d cision written by Pascale Baillet and published by . This book was released on 1994 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACTUELLEMENT, LES ENTREPRISES EVOLUENT DANS UN ENVIRONNEMENT PARTICULIEREMENT INCERTAIN. CETTE INCERTITUDE SE TRADUIT, ENTRE AUTRES, PAR L'ACCROISSEMENT DU NOMBRE DE PERTURBATIONS QUE SUBIT LE SYSTEME DE PRODUCTION. LE RACCOURCISSEMENT DU TEMPS DE REACTION EST UN MOYEN POUR PALLIER CES PERTURBATIONS. SA MISE EN PLACE DOIT PERMETTRE DE DONNER UNE REPONSE SATISFAISANTE FACE A UNE PERTURBATION, DANS UN DELAI CORRECT PAR RAPPORT A LA DYNAMIQUE DE L'ENVIRONNEMENT DU SYSTEME CONCERNE. NOUS NOUS SOMMES CONCENTRES SUR L'ETUDE DU SYSTEME DE DECISION EN GESTION DE PRODUCTION ET SUR L'ORDONNANCEMENT EN PARTICULIER. UN SYSTEME DE DECISION EST COMPOSE DE CENTRES DE DECISION INTERRELIES. DANS UN PREMIER TEMPS, NOUS AVONS VOULU DONNER UNE PLUS GRANDE AUTONOMIE AUX CENTRES DE DECISION. LE CONCEPT DE BASE UTILISE POUR CELA EST LA DECENTRALISATION DE LA DECISION. NOUS L'AVONS APPLIQUE EN NOUS APPUYANT SUR LES CONCEPTS MULTI-AGENTS. NOUS AVONS ALORS VU COMMENT LES CENTRES DE DECISION D'UN MEME NIVEAU DE DECISION POUVAIENT COOPERER POUR COMPENSER UNE PERTURBATION. DANS UN DEUXIEME TEMPS, AU SEIN MEME DU CENTRE DE DECISION D'ORDONNANCEMENT, NOUS AVONS PROPOSE, GRACE A UNE CLASSIFICATION DES PERTURBATIONS, DES TRAITEMENTS EN FONCTION DE LEUR IMPACT. CETTE PROPOSITION PERMET D'AMELIORER LA ROBUSTESSE DU PLAN DE FABRICATION. NOUS AVONS VU ENSUITE DANS QUELLE MESURE L'ENSEMBLE DES CONCEPTS MIS EN RELIEF AU NIVEAU DE L'ORDONNANCEMENT EST GENERALISABLE A TOUS LES NIVEAUX DU SYSTEME DE DECISION. IL A ALORS ETE NECESSAIRE D'ETUDIER COMMENT FIABILISER LES RELATIONS ENTRE LES NIVEAUX DE DECISION. UNE MAQUETTE LOGICIELLE ILLUSTRE ET VALIDE LES POINTS PRINCIPAUX DE NOTRE PROPOSITION POUR L'ORDONNANCEMENT. EN PARTICULIER, NOUS AVONS PROPOSE L'ARCHITECTURE D'UN CENTRE DE DECISION TYPE AINSI QU'UNE INTERFACE DE DIALOGUE ENTRE LES CENTRES DE DECISION

Download or read book G n ration automatique des proc dures de pilotage d une cellule flexible de production written by Dominique Gendreau and published by . This book was released on 1991 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: La performance des systèmes automatisés de production réside dans leur exploitation optimale, et en particulier dans le choix de nombreuses possibilités offertes pour l'exécution de la production. La conception de la conduite apparait donc comme une phase essentielle dans la conception de la commande de tels systèmes. Notre étude porte sur les cellules flexibles d'usinage pour lesquels nous envisageons une optimisation dans les cycles d'exécution, applicable en temps réel et avec des gains de temps espérés qui vont de la minute à plusieurs heures. Cette préoccupation est celle des entreprises de sous-traitance pour lesquelles les séries de pièces sont petites et les temps de réponse doivent être courts. D’autre part, le programme de production de la cellule est généralement élaboré à la conception du système et donc fige, ce qui ne permet pas de réagir de manière rapide et efficace aux perturbations qui surviennent pendant la production. Enfin, l'aspect générique de la conception de la commande de tels systèmes n'est jamais considéré. Le cas par cas est un état de fait hélas trop souvent constaté. C’est dans ce cadre, constitue par un besoin triple de flexibilité-réactivité-généricité, que se situent nos travaux, et nous nous intéressons plus précisément au module de pilotage, élément clé du système de conduite, puisque décideur de la meilleure stratégie d'exécution de la production applicable sur la cellule

Download or read book Culture urban future written by UNESCO and published by UNESCO Publishing. This book was released on 2016-12-31 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report presents a series of analyses and recommendations for fostering the role of culture for sustainable development. Drawing on a global survey implemented with nine regional partners and insights from scholars, NGOs and urban thinkers, the report offers a global overview of urban heritage safeguarding, conservation and management, as well as the promotion of cultural and creative industries, highlighting their role as resources for sustainable urban development. Report is intended as a policy framework document to support governments in the implementation of the 2030 Agenda for Sustainable Urban Development and the New Urban Agenda.

Download or read book Max Weber and Karl Marx written by Karl Lowith and published by Routledge. This book was released on 2002-11-01 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: First Published in 2004. Lowith's study of Max Weber and Karl Marx is a key text in modem interpretations of the theme of alienation in Marxist theory and rationalisation in Weber's sociology. It remains the best short student introduction to the differences and comparisons between these essential thinkers. This new edition includes a Preface by Professor Bryan S. Turner which demonstrates the relevance of the book for contemporary sociology.

Download or read book The Science of Passionate Interests written by Bruno Latour and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: How can economics become genuinely quantitative? This is the question that French sociologist Gabriel Tarde tackled at the end of his career, and in this pamphlet, Bruno Latour and Vincent Antonin Lépinay offer a lively introduction to the work of the forgotten genius of nineteenth-century social thought. Tarde's solution was in total contradiction to the dominant views of his time: to quantify the connections between people and goods, you need to grasp "passionate interests." In Tarde's view, capitalism is not a system of cold calculations--rather it is a constant amplification in the intensity and reach of passions. In a stunning anticipation of contemporary economic anthropology, Tarde's work defines an alternative path beyond the two illusions responsible for so much modern misery: the adepts of the Invisible Hand and the devotees of the Visible Hand will learn how to escape the sterility of their fight and recognize the originality of a thinker for whom everything is intersubjective, hence quantifiable. At a time when the regulation of financial markets is the subject of heated debate, Latour and Lépinay provide a valuable historical perspective on the fundamental nature of capitalism.

Download or read book Balancing Jobs and Family Life written by Halcyone H. Bohen and published by Philadelphia : Temple University Press. This book was released on 1981 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monograph on the effects of flexible hours of work on conflicting demands of parenting and employment (esp. Of married women woman workers) in the USA - based on a survey of civil servants in Washington D.C., considers sociological aspects and psychological aspects, the influence of traditional sexual division of labour, the effect on quality of working life, child care, job satisfaction, etc., and explains research methodology (incl. Data collecting and data analysis). Bibliography pp. 257 to 329 and tables.

Download or read book Organisational Resilience written by Ran Bhamra and published by CRC Press. This book was released on 2015-10-05 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: An eternal dilemma for all organizations, and one that a considerable portion of management schools are set up to address, is how to become and stay competitive. Organisational Resilience: Concepts, Integration, and Practice brings together, for the first time, key works that describe the scope and nature of resilience and provides direction to tak

Download or read book Real Time Digital Control Applications written by A. Alonso-Concheiro and published by Elsevier. This book was released on 2014-05-23 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real Time Digital Control Applications is a compilation of papers presented at the Symposium on Real-Time Digital Control Applications, sponsored by the International Federation of Automatic Control (IFAC) and the International Federation for Information Processing (IFIP), held in Guadalajara, Mexico. The event is organized to provide developing countries with the opportunity to gain insights -- from the sharing of ideas and experiences of experts from around the world to the rapid growth and development of applications of real-time digital control systems, which is considered as the basis of industrial revolution. The book presents and discusses the various scientific, industrial, and technical applications of real-time digital control systems. Applications in power generation, water, metal processing, cement, food, and manufacturing industries are shown. The text also covers applications in robotics, biomedicine, monitoring and failure detection, fuel optimization and heat control, adaptive process control, modeling, and computer software. Industrial engineers, scientists, economists, computer scientists, robotics experts, planners, and technicians will find this book invaluable.

Download or read book Transforming Computer Technology written by Arthur L. Norberg and published by Johns Hopkins University Press. This book was released on 2000-02-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Winner of the Association of American Publishers Professional and Scholarly Publishing Award for Computer Science Over the course of several decades, the Pentagon's Information Processing Techniques Office (IPTO) helped transform computing from a cumbersome enterprise based on batch processing to the instantly interactive, graphically rich, highly intelligent computing of today. With the purpose of improving command and control systems for the military, IPTO researchers strengthened time-sharing, laid the groundwork for graphics and parallel processing, contributed to the study of artificial intelligence, and developed the wide-area network that came to be known as the Internet. Transforming Computer Technology examines these and other developments at the Defense Department's Advanced Research Projects Agency in its heyday between 1962 and 1986. The authors show how Pentagon programs affected significant developments in both computer science and engineering. They analyze the management of the office, the origins and growth of important IPTO programs, and the interaction of the staff with the R & D community. They pay special attention to IPTO's role in executing research at the leading edge of computing and networking and in working with the military to transfer that research into practical use. And they show how, by the 1990s, the research results had been assimilated into systems both for the military and for civilian society.

Download or read book Internet Dreams written by Mark Stefik and published by MIT Press. This book was released on 1997 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internet Dreams illuminates not only how "the Net" is being created, but also stories about ourselves as our lives become electronically interconnected. Stefik explores some of the most provocative writings about the Internet to tease out the deeper metaphors and myths. 24 illustrations.

Download or read book Where Wizards Stay Up Late written by Matthew Lyon and published by Simon and Schuster. This book was released on 1999-08-19 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty five years ago, it didn't exist. Today, twenty million people worldwide are surfing the Net. Where Wizards Stay Up Late is the exciting story of the pioneers responsible for creating the most talked about, most influential, and most far-reaching communications breakthrough since the invention of the telephone. In the 1960's, when computers where regarded as mere giant calculators, J.C.R. Licklider at MIT saw them as the ultimate communications devices. With Defense Department funds, he and a band of visionary computer whizzes began work on a nationwide, interlocking network of computers. Taking readers behind the scenes, Where Wizards Stay Up Late captures the hard work, genius, and happy accidents of their daring, stunningly successful venture.

Download or read book Netizens written by Michael Hauben and published by Wiley-IEEE Computer Society Press. This book was released on 1997-05-11 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors conducted online research to find out what makes the Internet "tick", resulting in this examination of the pioneering vision and actions that have helped make the Net possible. "Netizens" is a detailed description of the Net's construction and a step-by-step view of the past, present, and future of the Internet, the Usenet and the World Wide Web.

Download or read book Virtual Reality written by Howard Rheingold and published by . This book was released on 1992-08-15 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Breaking the reality barrier ; the reality-industrial complex ; virtual reality and the future.