Modèles Stochastiques, Leur Solution Et Leur Application À L'évaluation Des Performances Des Réseaux Large Bande

Modèles Stochastiques, Leur Solution Et Leur Application À L'évaluation Des Performances Des Réseaux Large Bande PDF Author: Daniel Kofman
Publisher:
ISBN:
Category :
Languages : en
Pages : 166

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Book Description
LE DEVELOPPEMENT INCESSANT DE LA TECHNOLOGIE A PERMIS AUX RESEAUX D'EVOLUER POUR DONNER DES SERVICES DE PLUS EN PLUS SOPHISTIQUES. UN DES COUTS A PAYER POUR CETTE CAPACITE DE PROPOSER DE NOUVEAUX SERVICES EST UNE COMPLICATION DES ALGORITHMES DE PARTAGE DES RESSOURCES UTILISES QUI REND INOPERANTS LES MODELES DE PERFORMANCES DEVELOPPES POUR LES RESEAUX EXISTANTS. LE PRESENT TRAVAIL CONSISTE EN L'ELABORATION ET L'ANALYSE ANALYTIQUE DE MODELES MIEUX ADAPTES. LA PREMIERE PARTIE DE LA THESE EST DESTINEE A L'ETUDE DU MULTIPLEXAGE STATISTIQUE. LA DEUXIEME A L'ETUDE DE DEUX SYSTEMES DE POLLING. NOUS MONTRONS L'APPLICATION DE CES MODELES A L'ETUDE DE PERFORMANCES DES RESEAUX ATM ET FDDI. NOTRE MODELE DE MULTIPLEXAGE STATISTIQUE PERMET DE CALCULER LA QUALITE DE SERVICE OFFERTE A CHACUN DES FLUX MULTIPLEXES ET CECI POUR UNE FAMILLE TRES LARGE DE FLUX. LA QUALITE DE SERVICE EST UNE FONCTION DE L'ETAT DU MULTIPLEXEUR VU AUX INSTANTS DES ARRIVEES DES CELLULES. UNE DE NOS PRINCIPALES CONTRIBUTIONS EST L'EVALUATION DES PERFORMANCES DU SYSTEME A CES INSTANTS. L'ANALYSE EST BASEE SUR DES PROPRIETES DU TYPE EVENT AVERAGE-TIME AVERAGE QUE NOUS AVONS DEMONTREES ET QUI PRESENTENT UN INTERET EN ELLES MEMES DANS LE CADRE DE LA THEORIE DES PROCESSUS PONCTUELS MARQUES. NOUS PRESENTONS UNE CARACTERISATION DU TRAFIC ENGENDRE PAR DES RESEAUX LOCAUX. LE MULTIPLEXAGE DES SOURCES OBTENUS PEUT ETRE ANALYSE EN UTILISANT NOTRE MODELE DE MULTIPLEXAGE STATISTIQUE. LE DERNIER TRAVAIL QUE NOUS PRESENTONS DANS CETTE PARTIE EST L'ETUDE DE PERFORMANCES D'UN MULTIPLEXAGE DE SOURCES MARKOVIENNES CONTROLEES PAR DES CONTROLEURS LEAKY BUCKET. NOUS COMMENCONS LA DEUXIEME PARTIE PAR L'ANALYSE EXACTE D'UNE FILE D'UN SYSTEME DE POLLING AVEC DES BUFFERS DE CAPACITE FINIE. IL S'AGIT D'UN MODELE ETUDIE DEPUIS PLUSIEURS ANNEES, POUR LEQUEL IL N'EXISTAIT PAS DE SOLUTION ANALYTIQUE EXACTE. AFIN DE CAPTER LE COMPORTEMENT IRREGULIER DES FLUX QUI SONT PRESENTES A UN RESEAU LOCAL NOUS AVONS ETUDIE UN DEUXIEME MODELE DE POLLING DANS LEQUEL LES ARRIVEES SONT SIMPLEMENT CARACTERISEES PAR LA CHARGE MAXIMALE QU'ELLES PEUVENT ENGENDRER DANS N'IMPORTE QUEL INTERVALLE DE TEMPS.

Modèles Stochastiques, Leur Solution Et Leur Application À L'évaluation Des Performances Des Réseaux Large Bande

Modèles Stochastiques, Leur Solution Et Leur Application À L'évaluation Des Performances Des Réseaux Large Bande PDF Author: Daniel Kofman
Publisher:
ISBN:
Category :
Languages : en
Pages : 166

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Book Description
LE DEVELOPPEMENT INCESSANT DE LA TECHNOLOGIE A PERMIS AUX RESEAUX D'EVOLUER POUR DONNER DES SERVICES DE PLUS EN PLUS SOPHISTIQUES. UN DES COUTS A PAYER POUR CETTE CAPACITE DE PROPOSER DE NOUVEAUX SERVICES EST UNE COMPLICATION DES ALGORITHMES DE PARTAGE DES RESSOURCES UTILISES QUI REND INOPERANTS LES MODELES DE PERFORMANCES DEVELOPPES POUR LES RESEAUX EXISTANTS. LE PRESENT TRAVAIL CONSISTE EN L'ELABORATION ET L'ANALYSE ANALYTIQUE DE MODELES MIEUX ADAPTES. LA PREMIERE PARTIE DE LA THESE EST DESTINEE A L'ETUDE DU MULTIPLEXAGE STATISTIQUE. LA DEUXIEME A L'ETUDE DE DEUX SYSTEMES DE POLLING. NOUS MONTRONS L'APPLICATION DE CES MODELES A L'ETUDE DE PERFORMANCES DES RESEAUX ATM ET FDDI. NOTRE MODELE DE MULTIPLEXAGE STATISTIQUE PERMET DE CALCULER LA QUALITE DE SERVICE OFFERTE A CHACUN DES FLUX MULTIPLEXES ET CECI POUR UNE FAMILLE TRES LARGE DE FLUX. LA QUALITE DE SERVICE EST UNE FONCTION DE L'ETAT DU MULTIPLEXEUR VU AUX INSTANTS DES ARRIVEES DES CELLULES. UNE DE NOS PRINCIPALES CONTRIBUTIONS EST L'EVALUATION DES PERFORMANCES DU SYSTEME A CES INSTANTS. L'ANALYSE EST BASEE SUR DES PROPRIETES DU TYPE EVENT AVERAGE-TIME AVERAGE QUE NOUS AVONS DEMONTREES ET QUI PRESENTENT UN INTERET EN ELLES MEMES DANS LE CADRE DE LA THEORIE DES PROCESSUS PONCTUELS MARQUES. NOUS PRESENTONS UNE CARACTERISATION DU TRAFIC ENGENDRE PAR DES RESEAUX LOCAUX. LE MULTIPLEXAGE DES SOURCES OBTENUS PEUT ETRE ANALYSE EN UTILISANT NOTRE MODELE DE MULTIPLEXAGE STATISTIQUE. LE DERNIER TRAVAIL QUE NOUS PRESENTONS DANS CETTE PARTIE EST L'ETUDE DE PERFORMANCES D'UN MULTIPLEXAGE DE SOURCES MARKOVIENNES CONTROLEES PAR DES CONTROLEURS LEAKY BUCKET. NOUS COMMENCONS LA DEUXIEME PARTIE PAR L'ANALYSE EXACTE D'UNE FILE D'UN SYSTEME DE POLLING AVEC DES BUFFERS DE CAPACITE FINIE. IL S'AGIT D'UN MODELE ETUDIE DEPUIS PLUSIEURS ANNEES, POUR LEQUEL IL N'EXISTAIT PAS DE SOLUTION ANALYTIQUE EXACTE. AFIN DE CAPTER LE COMPORTEMENT IRREGULIER DES FLUX QUI SONT PRESENTES A UN RESEAU LOCAL NOUS AVONS ETUDIE UN DEUXIEME MODELE DE POLLING DANS LEQUEL LES ARRIVEES SONT SIMPLEMENT CARACTERISEES PAR LA CHARGE MAXIMALE QU'ELLES PEUVENT ENGENDRER DANS N'IMPORTE QUEL INTERVALLE DE TEMPS.

Modelling the Wireless Propagation Channel

Modelling the Wireless Propagation Channel PDF Author: Fernando P¿rez Font¿n
Publisher: John Wiley & Sons
ISBN: 0470751738
Category : Technology & Engineering
Languages : en
Pages : 268

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Book Description
A practical tool for propagation channel modeling with MATLAB® simulations. Many books on wireless propagation channel provide a highly theoretical coverage, which for some interested readers, may be difficult to follow. This book takes a very practical approach by introducing the theory in each chapter first, and then carrying out simulations showing how exactly put the theory into practice. The resulting plots are analyzed and commented for clarity, and conclusions are drawn and explained from the obtained results. Key features include: A unique approach to propagation channel modeling with accompanying MATLAB® simulations to demonstrate the theory in practice Contains step by step commentary and analysis of the obtained simulation results in order to provide a comprehensive and structured learning tool Covers a wide range of topics including shadowing effects, coverage and interference, Multipath Narrowband channel, Multipath Wideband channel, propagation in micro and pico-cells, the land mobile satellite (LMS) channel, the directional Multipath channel and MIMO and propagation effects in fixed radio links (terrestrial and satellite) The book comes with an accompanying website that contains the MATLAB® simulations and allows readers to try them out themselves Well suited for lab-use, as reference and as a self-learning tool both for advanced students and professionals Modeling the Wireless Propagation Channel: A simulation approach with MATLAB® will be best suited for postgraduate (Masters and PhD) students and practicing engineers in telecommunications and electrical engineering fields, who are seeking to familiarise themselves with the topic without too many formulas. The book will also be of interest to network engineers, system engineers and researchers

3G Evolution

3G Evolution PDF Author: Erik Dahlman
Publisher: Academic Press
ISBN: 9780123725332
Category : Technology & Engineering
Languages : en
Pages : 448

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Book Description
This practical book, written by engineers working closely in 3GPP, gives insight into the new technologies adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a ‘must-have’ resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition. Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution- fully operational mobile broadband Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP

Adhesion Between Polymers and Concrete / Adhésion Entre Polymères Et Béton

Adhesion Between Polymers and Concrete / Adhésion Entre Polymères Et Béton PDF Author: H. R. Sasse
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 792

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Book Description
Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.

The Vienna Development Method: The Meta-Language

The Vienna Development Method: The Meta-Language PDF Author: D. Bjorner
Publisher: Springer
ISBN: 9783662181713
Category : Computers
Languages : en
Pages : 384

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Book Description


Neuroscientific Foundations of Anesthesiology

Neuroscientific Foundations of Anesthesiology PDF Author: George A. Mashour
Publisher: Oxford University Press
ISBN: 0190453303
Category : Medical
Languages : en
Pages : 296

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Book Description
Although the perioperative care of patients by anesthesiologists draws on diverse clinical skills, the principles of anesthesiology and pain management are rooted in the neurosciences. The Neuroscientific Foundations of Anesthesiology thoroughly examines the anesthetic modulation of the central, peripheral, and autonomic nervous systems and will help redefine anesthesiology as a fundamentally neuroscientific field. The book is organized by sections, with each focusing on a different part of the nervous system. State-of-the-art chapters written by thought-leaders in anesthesiology and neuroscience provide a novel and invaluable resource.

Dynamique Non-linéaire Et Le Chaos

Dynamique Non-linéaire Et Le Chaos PDF Author:
Publisher:
ISBN:
Category : Chaotic behavior in systems
Languages : en
Pages : 130

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Book Description


Predicting Structured Data

Predicting Structured Data PDF Author: Neural Information Processing Systems Foundation
Publisher: MIT Press
ISBN: 0262026171
Category : Algorithms
Languages : en
Pages : 361

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Book Description
State-of-the-art algorithms and theory in a novel domain of machine learning, prediction when the output has structure.

Communicating Sequential Processes

Communicating Sequential Processes PDF Author: Charles Antony Richard Hoare
Publisher: Prentice Hall
ISBN:
Category : Computers
Languages : en
Pages : 264

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Book Description


Glowworm Swarm Optimization

Glowworm Swarm Optimization PDF Author: Krishnanand N. Kaipa
Publisher: Springer
ISBN: 3319515950
Category : Technology & Engineering
Languages : en
Pages : 265

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Book Description
This book provides a comprehensive account of the glowworm swarm optimization (GSO) algorithm, including details of the underlying ideas, theoretical foundations, algorithm development, various applications, and MATLAB programs for the basic GSO algorithm. It also discusses several research problems at different levels of sophistication that can be attempted by interested researchers. The generality of the GSO algorithm is evident in its application to diverse problems ranging from optimization to robotics. Examples include computation of multiple optima, annual crop planning, cooperative exploration, distributed search, multiple source localization, contaminant boundary mapping, wireless sensor networks, clustering, knapsack, numerical integration, solving fixed point equations, solving systems of nonlinear equations, and engineering design optimization. The book is a valuable resource for researchers as well as graduate and undergraduate students in the area of swarm intelligence and computational intelligence and working on these topics.