Download or read book Des priorit s fixes aux priorit s dynamiques en ordonnancement temps r el written by Bernard Chauvière and published by . This book was released on 2007 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nos recherches portent sur l’étude des systèmes temps-réel composés de tâches périodiques et ordonnancés en environnement multiprocesseur. Nos travaux s’organisent autour de deux thèmes de recherche~: la production de solutions d’ordonnancement et l’analyse quantitative de l’ordonnançabilité. Pour mener à bien ces recherches, nous avons été amenés à étudier certaines propriétés théoriques comme la cyclicité des séquences d’exécution. Sous certaines hypothèses, englobant par exemple RM, DM et EDF, nous montrons que les séquences d’exécution multiprocesseur sont cycliques, et nous proposons un intervalle de faisabilité. Nous apportons deux contributions au problème de l’ordonnancement. D’une part, nous proposons une méthode pour déterminer toutes les configurations de priorités fixes permettant d’ordonnancer un système de tâches. Nous étendons cette approche aux configurations de priorités fixes par instance et proposons l’étude d’une nouvelle classe de politiques d’ordonnancement. D’autre part, nous appliquons les méthodes d'approximation (méthode taboue, algorithmes génétiques, etc) au problème de l'ordonnancement des systèmes de tâches liées par des contraintes de précédence, afin d'obtenir des séquences d'exécution optimisant certains critères comme la durée totale d'exécution par exemple. Lorsque aucune politique connue n’est utilisable, le concepteur est généralement amené à modifier la conception du système. Peu de travaux permettent de le guider. Nous proposons une méthode basée sur les chaînes de Markov qui renseigne sur le comportement d’un système de tâches en fonction du support matériel utilisé. Les informations apportées permettent de comprendre les problèmes qui sont à la source des difficultés et donc d’aider à modifier la conception. Elles renseignent aussi sur la qualité de service offerte par le système.

Download or read book UNE APPROCHE D ORDONNANCEMENT TEMPS REEL BASEE SUR LA SELECTION DYNAMIQUE DE REGLES DE PRIORITE written by NASSER.. MEBARKI and published by . This book was released on 1995 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA GESTION DES FILES D'ATTENTE PAR DES REGLES DE PRIORITE CONSTITUE UNE DES APPROCHES LES PLUS SIMPLES ET LES PLUS UTILISEES POUR ORDONNANCER DYNAMIQUEMENT LES TACHES DANS L'ATELIER. DE TRES NOMBREUSES REGLES DE PRIORITE ONT ETE PROPOSEES ET ETUDIEES PAR DE TRES NOMBREUX CHERCHEURS. MALHEUREUSEMENT, UN DES PROBLEMES LES PLUS IMPORTANTS CONCERNANT L'UTILISATION DES REGLES DE PRIORITE EST CONSTITUE PAR LE FAIT QU'AUCUNE REGLE N'APPARAIT COMME GLOBALEMENT MEILLEURE QUE LES AUTRES. L'EFFICACITE ET LA PERTINENCE DES REGLES DE PRIORITE DEPEND ETROITEMENT DES CRITERES DE PERFORMANCE EVALUES ET DES CONDITIONS OPERATOIRES EFFECTIVES DANS L'ATELIER ET SURTOUT DE L'ETAT DE L'ATELIER. POUR REMEDIER A CES INCONVENIENTS, NOUS PROPOSONS DANS CETTE THESE UNE APPROCHE D'ORDONNANCEMENT TEMPS REEL BASEE SUR UNE SELECTION DYNAMIQUE DES REGLES DE PRIORITE. CETTE SELECTION EST REALISEE EN FONCTION DES CONDITIONS OPERATOIRES, DES OBJECTIFS DE PRODUCTION ET DE L'ETAT DE L'ATELIER. PUISQUE L'ETAT DE L'ATELIER CHANGE AU COURS DU TEMPS, NOUS PROPOSONS D'ANALYSER L'ETAT DU SYSTEME CHAQUE FOIS QU'UNE DECISION D'ORDONNANCEMENT DOIT ETRE PRISE, AFIN DE PRENDRE EN COMPTE L'ETAT REEL DE L'ATELIER. CETTE ANALYSE DE L'ETAT DE L'ATELIER PERMET D'ETABLIR UN DIAGNOSTIC DE L'ETAT DE L'ATELIER, QUI INDIQUE LES DYSFONCTIONNEMENTS ET LES DEVIATIONS DU SYSTEME PAR RAPPORT AUX OBJECTIFS A ATTEINDRE. CE DIAGNOSTIC EST ETABLI A PARTIR DE SYMPOMES PREDETERMINES (PRESENCE DE GOULOTS D'ETRANGLEMENT, TROP DE RETARD), QUI PEUVENT ETRE PUREMENT LOCAUX LORSQU'ILS CONCERNENT UN OBJET PRECIS DU SYSTEME (UN ORDRE DE FABRICATION PARTICULIER, UNE RESSOURCE PARTICULIERE, UNE FILE D'ATTENTE) OU GLOBAUX LORSQU'ILS FONT REFERENCE A UNE DEVIATION GLOBALE DES OBJECTIFS DE L'ATELIER (TROP DE RETARD). CETTE APPROCHE A ETE IMPLEMENTEE DANS UN LOGICIEL DE SIMULATION ORIENTEE OBJET. SUR UN MODELE D'ATELIER JOB-SHOP, LES TESTS CONDUITS ONT MONTRE QUE CETTE APPROCHE COMPAREE A DE NOMBREUSES REGLES DE PRIORITE, DONNAIT DE MEILLEURS RESULTATS SUR CERTAINS CRITERES DE PERFORMANCE, TELS QUE LE RETARD CONDITIONNEL. DE PLUS, L'AVANTAGE DE CETTE NOUVELLE APPROCHE EST PARTICULIEREMENT SENSIBLE LORSQU'IL S'AGIT DE COMBINER DIFFERENTS CRITERES DE PERFORMANCE

Download or read book RAIRO Revue Fran aise D automatique D informatique Et de Recherche Op rationnelle written by and published by . This book was released on 1982 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiprocessor Systems on Chips written by Ahmed Jerraya and published by Morgan Kaufmann. This book was released on 2005 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern system-on-chip (SoC) design shows a clear trend toward integration of multiple processor cores on a single chip. Designing a multiprocessor system-on-chip (MPSOC) requires an understanding of the various design styles and techniques used in the multiprocessor. Understanding the application area of the MPSOC is also critical to making proper tradeoffs and design decisions. Multiprocessor Systems-on-Chips covers both design techniques and applications for MPSOCs. Design topics include multiprocessor architectures, processors, operating systems, compilers, methodologies, and synthesis algorithms, and application areas covered include telecommunications and multimedia. The majority of the chapters were collected from presentations made at the International Workshop on Application-Specific Multi-Processor SoC held over the past two years. The workshop assembled internationally recognized speakers on the range of topics relevant to MPSOCs. After having refined their material at the workshop, the speakers are now writing chapters and the editors are fashioning them into a unified book by making connections between chapters and developing common terminology. *Examines several different architectures and the constraints imposed on them *Discusses scheduling, real-time operating systems, and compilers *Analyzes design trade-off and decisions in telecommunications and multimedia applications

Download or read book Scheduling for Parallel Processing written by Maciej Drozdowski and published by Springer Science & Business Media. This book was released on 2010-03-14 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overview and Goals This book is dedicated to scheduling for parallel processing. Presenting a research ?eld as broad as this one poses considerable dif?culties. Scheduling for parallel computing is an interdisciplinary subject joining many ?elds of science and te- nology. Thus, to understand the scheduling problems and the methods of solving them it is necessary to know the limitations in related areas. Another dif?culty is that the subject of scheduling parallel computations is immense. Even simple search in bibliographical databases reveals thousands of publications on this topic. The - versity in understanding scheduling problems is so great that it seems impossible to juxtapose them in one scheduling taxonomy. Therefore, most of the papers on scheduling for parallel processing refer to one scheduling problem resulting from one way of perceiving the reality. Only a few publications attempt to arrange this ?eld of knowledge systematically. In this book we will follow two guidelines. One guideline is a distinction - tween scheduling models which comprise a set of scheduling problems solved by dedicated algorithms. Thus, the aim of this book is to present scheduling models for parallel processing, problems de?ned on the grounds of certain scheduling models, and algorithms solving the scheduling problems. Most of the scheduling problems are combinatorial in nature. Therefore, the second guideline is the methodology of computational complexity theory. Inthisbookwepresentfourexamplesofschedulingmodels. Wewillgodeepinto the models, problems, and algorithms so that after acquiring some understanding of them we will attempt to draw conclusions on their mutual relationships.

Download or read book Modern Enterprise Data Pipelines written by Mike Bachman and published by . This book was released on 2021-06-25 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A Dell Technologies perspective on today's data landscape and the key ingredients for planning a modern, distributed data pipeline for your multicloud data-driven enterprise

Download or read book FiWi Access Networks written by Martin Maier and published by Cambridge University Press. This book was released on 2011-12-15 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of broadband access networks toward bimodal fiber-wireless (FiWi) access networks, described in this book, may be viewed as the endgame of broadband access. After discussing the economic impact of broadband access and current worldwide deployment statistics, all the major legacy wireline and wireless broadband access technologies are reviewed. State-of-the-art GPON and EPON fiber access networks are described, including their migration to next-generation systems such as OCDMA and OFDMA PONs. The latest developments of wireless access networks are covered, including VHT WLAN, Gigabit WiMAX, LTE and WMN. The advantages of FiWi access networks are demonstrated by applying powerful network coding, heterogeneous optical and wireless protection, hierarchical frame aggregation, hybrid routing and QoS continuity techniques across the optical-wireless interface. The book is an essential reference for anyone working on optical fiber access networks, wireless access networks or converged FiWi systems.

Download or read book Demand Driven Material Requirements Planning DDMRP written by Carol Ptak and published by Industrial Press. This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "An intuitive proven planning and execution method for today's complex and volatile supply chains"--Cover.

Download or read book Intercultural Competence written by Gerhard Neuner and published by Council of Europe. This book was released on 2003-01-01 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical Inference for Ergodic Diffusion Processes written by Yury A. Kutoyants and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book in inference for stochastic processes from a statistical, rather than a probabilistic, perspective. It provides a systematic exposition of theoretical results from over ten years of mathematical literature and presents, for the first time in book form, many new techniques and approaches.

Download or read book Semiparametric Theory and Missing Data written by Anastasios Tsiatis and published by Springer Science & Business Media. This book was released on 2007-01-15 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes current knowledge regarding the theory of estimation for semiparametric models with missing data, in an organized and comprehensive manner. It starts with the study of semiparametric methods when there are no missing data. The description of the theory of estimation for semiparametric models is both rigorous and intuitive, relying on geometric ideas to reinforce the intuition and understanding of the theory. These methods are then applied to problems with missing, censored, and coarsened data with the goal of deriving estimators that are as robust and efficient as possible.

Download or read book Principles of Sequencing and Scheduling written by Kenneth R. Baker and published by John Wiley & Sons. This book was released on 2018-11-06 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: An updated edition of the text that explores the core topics in scheduling theory The second edition of Principles of Sequencing and Scheduling has been revised and updated to provide comprehensive coverage of sequencing and scheduling topics as well as emerging developments in the field. The text offers balanced coverage of deterministic models and stochastic models and includes new developments in safe scheduling and project scheduling, including coverage of project analytics. These new topics help bridge the gap between classical scheduling and actual practice. The authors—noted experts in the field—present a coherent and detailed introduction to the basic models, problems, and methods of scheduling theory. This book offers an introduction and overview of sequencing and scheduling and covers such topics as single-machine and multi-machine models, deterministic and stochastic problem formulations, optimization and heuristic solution approaches, and generic and specialized software methods. This new edition adds coverage on topics of recent interest in shop scheduling and project scheduling. This important resource: Offers comprehensive coverage of deterministic models as well as recent approaches and developments for stochastic models Emphasizes the application of generic optimization software to basic sequencing problems and the use of spreadsheet-based optimization methods Includes updated coverage on safe scheduling, lognormal modeling, and job selection Provides basic coverage of robust scheduling as contrasted with safe scheduling Adds a new chapter on project analytics, which supports the PERT21 framework for project scheduling in a stochastic environment. Extends the coverage of PERT 21 to include hierarchical scheduling Provides end-of-chapter references and access to advanced Research Notes, to aid readers in the further exploration of advanced topics Written for upper-undergraduate and graduate level courses covering such topics as scheduling theory and applications, project scheduling, and operations scheduling, the second edition of Principles of Sequencing and Scheduling is a resource that covers scheduling techniques and contains the most current research and emerging topics.

Download or read book Jews in Early Christian Law written by John Victor Tolan and published by Brepols Publishers. This book was released on 2014 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is the place of Jews in medieval Christian societies? in the ninetheenth and early twentieth centuries, this question was largely confined to Jewish scholars, and the academic debates where inseparable from the upheavels of the lives of contemporary European Jews.

Download or read book Arctic Shipping written by Frédéric Lasserre and published by Routledge. This book was released on 2019-09-05 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book considers both the present state of Arctic shipping and possible future trends with reference to the various sectors of maritime transportation: cruise tourism, container traffic and bulk shipping. Ports are analysed as tools that support the strategies of coastal states to foster the development of resource extraction, enhance the attractiveness of Arctic shipping lanes and enable the control of maritime activities through coast guard deployment. The aim of this book is to draw a picture of the trends of Arctic shipping. How is traffic evolving in Canada’s Arctic, or along the Northern Sea Route? Are there significant differences between bulk and container shipping segments when considering the Arctic market? How are the ports and the hinterland developing and what are the strategies behind those? How is the legal framework shaping the evolution of maritime transportation? The contributors to this book consider all of these questions, and more, as they map out the prospects for Arctic shipping and analyse in detail the development of Arctic shipping as a result of multi-variable interactions. This book will be key reading for industry professionals and post-graduate students alike.

Download or read book Information Theory and Esthetic Perception written by Abraham A. Moles and published by . This book was released on 1968 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sicily Before the Greeks written by Luigi Bernabò Brea and published by . This book was released on 1957 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: A noted Italian archaeologist describes Sicilian culture from Palaeolithic times to the arrival of Greek colonists in the 8th century B. C.

Download or read book The Impact of Global Drug Policy on Women written by Julia Buxton and published by Emerald Group Publishing. This book was released on 2020-11-19 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ebook edition of this title is Open Access and freely available to read online. Examining the impact of drug criminalisation on a previously overlooked demographic, this book argues that women are disproportionately affected by a flawed policy approach.