Download or read book Optimisation de l Ordonnancement Dans Un Environnement Incertain written by Djamel Berkoune and published by Omniscriptum. This book was released on 2018-02-28 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail s'articule autour de deux parties principales. La premi re consiste trouver un ordonnancement pour les demandes fermes, afin d'optimiser un certain nombre de crit res. La deuxi me partie consiste mettre au point des m thodes permettant l'insertion des demandes pr visionnelles dans les solutions trouv es tout en optimisant les crit res consid r s. Pour r soudre ce probl me nous avons d velopp deux approches. La premi re est la m thode d'insertion statique qui permet d'ins rer les demandes pr visionnelles dans les disponibilit s des machines, et de d caler certaines op rations, si necessaire. La deuxi me est la m thode dynamique qui permet de r ordonnancer au fur et mesure des changements des caract ristiques des jobs. Pour tester l'efficacit de ces solutions, nous avons d termin une approche bas e sur le calcul des bornes inf rieures pour les crit res, qui se calcule pour les demandes fermes et pour les pr visionnelles, Ces bornes inf rieures pourront caract riser les limites des solutions r alisables.
Download or read book Ordonnancement en milieu incertain mise en oeuvre d une d marche robuste written by André Rossi and published by . This book was released on 2003 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée à l'étude de l'ordonnancement en contexte incertain. La première partie précise la notion de contexte incertain en optimisation et présente les outils les plus connus pour prendre en compte l'incertitude. Le problème d'ordonnancement en contexte incertain est présenté sous sa forme prédictive et sous sa forme réactive, sans prise en compte explicite du caractère incertain des données. La deuxième partie traite des méthodes de prise en compte explicites de l'incertain avec garantie de performance. Les notions de robustesse et de flexibilité sont définies et illustrées par des exemples. La troisieme partie présente la modélisation d'un atelier de photolithographie, et replace le problème de sa configuration dans le cadre de l'ordonnancement. Ce problème est traité sous trois hypothèses concernant les incertitudes. La première hypothèse est traitée dans la troisième partie. La quatrième partie est consacrée à la configuration de l'atelier lorsque la charge ou le temps de traitement de la commande n'est pas affecté par les perturbations. Le rayon de stabilité est présenté pour augmenter la robustesse de cette configuration. Enfin, la cinquième partie traite du même problème sans hypothèse particulière concernant les perturbations que subit la commande de l'atelier.
Download or read book Optimisation de l ordonnancement prenant en compte les t ches pr visionnelles written by Djamel Berkoune and published by . This book was released on 2005 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le contexte actuel impose aux entreprises des délais de plus en plus serrés, alors que la demande est de plus en plus irrégulière. Dans cet environnement incertain, notre travail concerne la mise en œuvre des méthodologies coopératives pour résoudre les problèmes des job-shops flexibles avec des demandes prévisionnelles. Il s'articule autour de deux parties principales. La première consiste à trouver un ordonnancement pour les demandes fermes. La deuxième consiste à insérer les demandes prévisionnelles dans les solutions initiales en optimisant les critères considérés, en utilisant des méthodes d'insertion (statique et dynamique). Pour tester l'efficacité des solutions, on à déterminer deux approches de calcul des bornes inférieures pour les critères (bornes des demandes fermes et des prévisionnelles). Une méthode de résolution pour les problèmes multicritères en affectant les poids de préférence des critères dynamiquement. Enfin, nous concluons par des d'exemples d'applications
Download or read book Contribution l laboration d un outil d aide la d cision pour l ordonnancement de production en environnement incertain written by Noureddine Liouane and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'elaboration d'un ordonnancement de la production est une tache de grande importance pour la prise de decision dans un environnement industriel incertain. C'est un domaine ou la theorie n'a pas apporte un modele general de resolution, cela est du essentiellement d'une part a la grande diversite des cas pratiques et au manque d'experience dans des situations de prise de decisions, et d'autre part au manque d'outils pour la resolution des problemes np-complets de l'ordonnancement de la production dont la complexite ne cesse de croitre. Generalement l'environnement de la production est entache d'erreurs, d'imprecisions et d'incertitudes, c'est la raison pour laquelle il est important de pouvoir exprimer un ensemble d'informations incertaines et non sures dans un systeme pilote a partir d'un ensemble de regles et de connaissances. Notre approche pour resoudre ce type de problemes et pouvoir proposer un ordonnancement credible et robuste au sens des responsables de la production, est basee sur un modele d'ordonnancement flou (mof) qui tient compte des erreurs et des imprecisions qui peuvent survenir au cours de la production. Ce modele d'ordonnancement flou est base d'une part sur l'application de la theorie des ensembles flous et d'autre part sur l'exploitation d'un ensemble de connaissances, decrites sous forme de regles simples, issues d'origines differentes (statistiques, opinions, bureau d'etude, chef de production,), pour caracteriser les ressources disponibles de production (hommes, machines, informations). Une methode de recherche d'un ordonnancement robuste vis a vis des imprecisions des experts et vis a vis du processus d'inference choisi et une mise en uvre illustree par des exemples ont ete presentees.
Download or read book Sur l ordonnancement d ateliers en ligne en environnement incertain et impr cis written by Vladimir Bourgade and published by . This book was released on 1998 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ordonnancement dans les ateliers hybrides en environnement incertain written by Ghassen Cherif and published by . This book was released on 2021 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse concerne les problèmes d'ordonnancement pour une classe de systèmes manufacturiers flexibles (FMS) en environnement incertain. Les systèmes considérés répondent aux exigences de l'industrie 4.0 qui requièrent des organisations plus agiles permettant de proposer des produits personnalisés. Plus précisément, les systèmes proposés dans ce travail sont appelés FMS hybrides et traitent les opérations avec des contraintes de précédence partielles entre les opérations. La première contribution est une approche systématique de modélisation des FMS hybrides avec les réseaux de Petri temporisés sur les transitions (T-TPN) et un formalisme multi-niveaux basé sur la structuration hiérarchique des opérations. La deuxième contribution concerne la recherche d'ordonnancements pour les FMS hybrides. Nous utilisons la recherche en faisceau et proposons une fonction coût basée sur la modélisation multiniveaux. Nous proposons également une nouvelle variante de la recherche en faisceau, appelée Generation Filtered Beam Search (GFBS). Cette nouvelle variante améliore la qualité des candidats sélectionnés par rapport à d'autres variantes par un meilleur équilibre entre la largeur et la profondeur de la recherche. La troisième contribution concerne l'étude des aléas pouvant affecter le système. Un risque d'interruption, dû à l'occurrence d'événements incontrôlables, est intégré, et une nouvelle fonction coût qui intègre ce risque est définie. Enfin, un algorithme de recherche en faisceau modifié, appelé Generation Double Filtered Beam Search (GDFBS), qui accélère la convergence de la méthode, est proposé. Ce nouvel algorithme est basé sur un mécanisme de filtrage qui utilise la fonction coût pour explorer de manière sélective l'espace d'état du T-TPN afin de trouver une séquence de contrôle qui réalise un compromis entre performance et risque.
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 Conservation Regeneration the Modernist Neighbourhood written by and published by . This book was released on 2012 with total page 807 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Performance in Planning and Scheduling written by B L MacCarthy and published by CRC Press. This book was released on 2003-09-02 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding how to make the best of human skills and knowledge is essential in the design of technology and jobs, particularly where these involve decision-making and uncertainty. Recent developments have been made in naturalistic decision-making, distributed cognition and situational awareness, particularly with respect to aviation, transport and strategic planning, the nuclear industry and other high-risk industries. Despite the integration of computer-based support systems in production scheduling in recent years, the reality is that most enterprises consist of reactive re-scheduling, involving a high degree of human involvement. It is often with the insight, knowledge and skills of people that scheduling skills can function with any degree of success. Human Performance in Planning and Scheduling covers many industries, including clothing, steel, machine tools, paper/board, and the automobile industry. Using international case studies from various manufacturing industries, they highlight the fact that the human scheduler is a pivotal element in the scheduling process. Each section of the book includes an introduction with an overview of the material to follow, clearly identifying themes, discussion points and highlights inter-connections between the authors' work.
Download or read book Handbook of Production Scheduling written by Jeffrey W. Herrmann and published by Springer Science & Business Media. This book was released on 2006-08-18 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book concentrates on real-world production scheduling in factories and industrial settings. It includes industry case studies that use innovative techniques as well as academic research results that can be used to improve production scheduling. Its purpose is to present scheduling principles, advanced tools, and examples of innovative scheduling systems to persons who could use this information to improve their own production scheduling.
Download or read book Behavioral Operations in Planning and Scheduling written by Jan C. Fransoo and published by Springer Science & Business Media. This book was released on 2010-09-22 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human and organizational factors have a substantial impact on the performance of planning and scheduling processes. Despite widespread and advanced decision support systems, human decision makers are still crucial to improve the operational performance in manufacturing industries. In this text, the state of the art in this area is discussed by experts from a wide variety of engineering and social science disciplines. Moreover, recent results from collaborative studies and a number of field cases are presented. The text is targeted at researchers and graduate students, but is also particularly useful for managers, consultants, and system developers to better understand how human performance can be advanced.
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.
Download or read book Decentralised Internet of Things written by Mohammad Ayoub Khan and published by Springer. This book was released on 2020-02-14 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents practical as well as conceptual insights into the latest trends, tools, techniques and methodologies of blockchains for the Internet of Things. The decentralised Internet of Things (IoT) not only reduces infrastructure costs, but also provides a standardised peer-to-peer communication model for billions of transactions. However, there are significant security challenges associated with peer-to-peer communication. The decentralised concept of blockchain technology ensures transparent interactions between different parties, which are more secure and reliable thanks to distributed ledger and proof-of-work consensus algorithms. Blockchains allow trustless, peer-to-peer communication and have already proven their worth in the world of financial services. The blockchain can be implanted in IoT systems to deal with the issues of scale, trustworthiness and decentralisation, allowing billions of devices to share the same network without the need for additional resources. This book discusses the latest tools and methodology and concepts in the decentralised Internet of Things. Each chapter presents an in-depth investigation of the potential of blockchains in the Internet of Things, addressing the state-of-the-art in and future perspectives of the decentralised Internet of Things. Further, industry experts, researchers and academicians share their ideas and experiences relating to frontier technologies, breakthrough and innovative solutions and applications.
Download or read book Constraint Networks written by Christophe Lecoutre and published by John Wiley & Sons. This book was released on 2013-03-01 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major challenge in constraint programming is to develop efficient generic approaches to solve instances of the constraint satisfaction problem (CSP). With this aim in mind, this book provides an accessible synthesis of the author's research and work in this area, divided into four main topics: representation, inference, search, and learning. The results obtained and reproduced in this book have a wide applicability, regardless of the nature of the problem to be solved or the type of constraints involved, making it an extremely user-friendly resource for those involved in this field.
Download or read book Naturalistic Decision Making written by Caroline E. Zsambok and published by Psychology Press. This book was released on 2014-01-02 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you aren't using the term naturalistic decision making, or NDM, you soon will be. Even as a very young field, NDM has already had far-reaching applications in areas as diverse as management, aviation, health care, nuclear power, military command and control, corporate teamwork, and manufacturing. Put simply, NDM is the way people use their experience to make decisions in the context of a job or task. Of particular interest to NDM researchers are the effects of high-stake consequences, shifting goals, incomplete information, time pressure, uncertainty, and other conditions that are present in most of today's work places and that add to the complexity of decision making. Applications of NDM research findings target decision aids and training that help people in their decision-making processes. This book reports the findings of top NDM researchers, as well as many of their current applications. In addition, the book offers a historical perspective on the emergence of this new paradigm, describes recent theoretical and methodological advancements, and points to future developments. It was written for people interested in decision making research and applications relative to a diverse array of work settings and products such as human-computer interfaces, decision support systems, individual and team training, product designs, and organizational development and planning.
Download or read book Project Scheduling written by Erik Leuven Demeulemeester and published by Springer Science & Business Media. This book was released on 2002-06-30 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt: Project management can be broadly defined as the process of managing, allocating and timing resources to achieve given objectives in an efficient and expedient manner. The objectives of the book cover three areas: classification; procedures; and problems.
Download or read book New Economy New Myth written by Jean Gadrey and published by Routledge. This book was released on 2002-11-28 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 'new economy' has been criticised greatly of late, and after the speculation and hype that surrounded the internet bubble, this is hardly surprising. This book, first published in French and updated here, however treats the 'new economy' as a discourse - one that is often misleading. In order to understand what happened during the internet bubb
