Une methode efficace d'acceleration de la simulation des reseaux de Petri stochastiques PDF Download
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Author: Robert Garnier (toxicologue).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Author: Robert Garnier (toxicologue).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
Get Book Here
Book Description
Author: Robert Garnier (toxicologue).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 155
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Book Description
L'ANALYSE DES PERFORMANCES DES SYSTEMES A HAUT NIVEAU DE SURETE REQUIERT SOUVENT L'USAGE DE METHODES DE SIMULATION, QUI SONT ALORS CONFRONTEES AU PROBLEME POSE PAR LES EVENEMENTS RARES. POUR CONTOURNER CE PROBLEME, UNE METHODE D'ACCELERATION DE LA SIMULATION, DENOMMEE METHODE DU CONDITIONNEMENT TEMPOREL, EST PROPOSEE. APPLIQUEE AUX RESEAUX DE PETRI STOCHASTIQUES, ELLE PERMET, EN FORCANT L'OCCURRENCE DE CERTAINS EVENEMENTS, D'AUGMENTER LA PROBABILITE D'OCCURRENCE DES EVENEMENTS RARES, SANS INDUIRE DE BIAIS. SON EFFICACITE EST DEMONTREE SUR DES CAS D'APPLICATION ISSUS D'ETUDES INDUSTRIELLES REELLES.
Author: MIGUEL.. CANALES REVECO
Publisher:
ISBN:
Category :
Languages : fr
Pages : 153
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Book Description
ON PRESENTE ICI UNE NOUVELLE APPROCHE DE SIMULATION POUR LES GRAPHES D'EVENEMENTS STOCHASTIQUES, QUI EST PARTICULIEREMENT APPROPRIEE POUR UNE IMPLEMENTATION SUR UNE ARCHITECTURE SIMD. CETTE APPROCHE EST FONDEE SUR DES EQUATIONS DE RECURRENCE, LINEAIRES DANS (R, MAX, +), RECEMMENT ETABLIES POUR CE TYPE DE SYSTEME. TROIS VARIANTES SONT PRESENTEES: LA VARIANTE TEMPORELLE, LA VARIANTE SPATIALE ET LA VARIANTE PAR NIVEAUX. LA VARIANTE TEMPORELLE, QUI GENERALISE POUR LES RESEAUX DE PETRI UNE METHODE INTRODUITE POUR DES FILES D'ATTENTE, EST APPROPRIEE POUR LA SIMULATION DE PETITS SYSTEMES PENDANT DES INTERVALLES LONGS. LA VARIANTE SPATIALE PERMET LA SIMULATION DE RESEAUX PLUS GRANDS ET LE CALCUL SIMPLE DES STATISTIQUES DU PROCESSUS DE MARQUAGE. LA VARIANTE PAR NIVEAUX PERMET LA SIMULATION DE SYSTEMES ENCORE PLUS GRANDS, MAIS AVEC L'UTILISATION DE PLUS DE MEMOIRE PAR PROCESSEUR. ON ETUDIE LA COMPLEXITE PARALLELE THEORIQUE DES ALGORITHMES ASSOCIES A CHAQUE VARIANTE. QUELQUES EXEMPLES D'INTERET PRATIQUE SONT PRESENTES (RESEAUX DE FILES D'ATTENTE AVEC BLOCAGE, UN MODELE D'ATELIER STOCHASTIQUE) POUR LESQUELS LE COUT DE SIMULATION DE O(NT) EVENEMENTS D'UN RESEAU DE TAILLE T, EST DE O(N LOG T) AVEC LA VARIANTE SPATIALE. AVEC UNE METHODE TRADITIONNELLE, LE COUT DE SIMULATION DU MEME SYSTEME EST D'AU MOINS O(NT). CES CONSIDERATIONS THEORIQUES ONT ETE CONFIRMEES PAR UN PROTOTYPE QUI IMPLEMENTE LA NOUVELLE APPROCHE SUR UNE CONNECTION MACHINE-2
Author: Sandip Mazumder
Publisher: Academic Press
ISBN: 0128035048
Category : Mathematics
Languages : en
Pages : 484
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Book Description
Numerical Methods for Partial Differential Equations: Finite Difference and Finite Volume Methods focuses on two popular deterministic methods for solving partial differential equations (PDEs), namely finite difference and finite volume methods. The solution of PDEs can be very challenging, depending on the type of equation, the number of independent variables, the boundary, and initial conditions, and other factors. These two methods have been traditionally used to solve problems involving fluid flow. For practical reasons, the finite element method, used more often for solving problems in solid mechanics, and covered extensively in various other texts, has been excluded. The book is intended for beginning graduate students and early career professionals, although advanced undergraduate students may find it equally useful. The material is meant to serve as a prerequisite for students who might go on to take additional courses in computational mechanics, computational fluid dynamics, or computational electromagnetics. The notations, language, and technical jargon used in the book can be easily understood by scientists and engineers who may not have had graduate-level applied mathematics or computer science courses. - Presents one of the few available resources that comprehensively describes and demonstrates the finite volume method for unstructured mesh used frequently by practicing code developers in industry - Includes step-by-step algorithms and code snippets in each chapter that enables the reader to make the transition from equations on the page to working codes - Includes 51 worked out examples that comprehensively demonstrate important mathematical steps, algorithms, and coding practices required to numerically solve PDEs, as well as how to interpret the results from both physical and mathematic perspectives
Author: Jamie Davies
Publisher:
ISBN: 019884154X
Category :
Languages : en
Pages : 137
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Book Description
Written primarily for mid-to-upper level undergraduates, this primer will introduce students to topics at the forefront of the subject that are being applied to probe biological problems, or to address the most pressing issues facing society. These topics will include those that form thecornerstone of contemporary research, helping students to make the transition to active researcher.This primer introduces the challenges and opportunities of applying synthetic biological techniques to mammalian cells, tissues, and organisms. It covers the special features that make engineering mammalian systems different from engineering bacteria, fungi, and plants, and provides an overview ofcurrent techniques. A variety of cutting-edge examples illustrate the different purposes of mammalian synthetic biology, including pure biomedical research, drug production, tissue engineering, and regenerative medicine.
Author: International Livestock Research Institute
Publisher: ILRI (aka ILCA and ILRAD)
ISBN: 9789291460038
Category : Animal industry
Languages : en
Pages : 268
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Book Description
Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author: Collectif
Publisher: IRD Éditions
ISBN: 2709922207
Category : Nature
Languages : en
Pages : 736
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Book Description
This book has been published by Allenvi (French National Alliance for Environmental Research) to coincide with the 22nd Conference of Parties to the United Nations Framework Convention on Climate Change (COP22) in Marrakesh. It is the outcome of work by academic researchers on both sides of the Mediterranean and provides a remarkable scientific review of the mechanisms of climate change and its impacts on the environment, the economy, health and Mediterranean societies. It will also be valuable in developing responses that draw on “scientific evidence” to address the issues of adaptation, resource conservation, solutions and risk prevention. Reflecting the full complexity of the Mediterranean environment, the book is a major scientific contribution to the climate issue, where various scientific considerations converge to break down the boundaries between disciplines.
Author: Rudi Klatte
Publisher: Springer Science & Business Media
ISBN: 3642772773
Category : Computers
Languages : en
Pages : 348
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Book Description
This manual describes a PASCAL extension for scientific computation with the short title PASCAL-XSC (PASCAL eXtension for Scientific Computation). The language is the result of a long term effort of members of the Institute for Applied Mathematics of Karlsruhe University and several associated scientists. PASCAL XSC is intended to make the computer more powerful arithmetically than usual. It makes the computer look like a vector processor to the programmer by providing the vector/matrix operations in a natural form with array data types and the usual operator symbols. Programming of algorithms is thus brought considerably closer to the usual mathematical notation. As an additional feature in PASCAL-XSC, all predefined operators for real and complex numbers and intervals, vectors, matrices, and so on, deliver an answer that differs from the exact result by at most one rounding. Numerical mathematics has devised algorithms that deliver highly accurate and automatically verified results by applying mathematical fixed point theorems. That is, these computations carry their own accuracy control. However, their imple mentation requires arithmetic and programming tools that have not been available previously. The development of PASCAL-XSC has been aimed at providing these tools within the PASCAL setting. Work on the subject began during the 1960's with the development of a general theory of computer arithmetic. At first, new algorithms for the realization of the arithmetic operations had to be developed and implemented.
Author: Rudi Klatte
Publisher: Springer Science & Business Media
ISBN: 3642580580
Category : Computers
Languages : en
Pages : 277
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Book Description
C-XSC is a tool for the development of numerical algorithms delivering highly accurate and automatically verified results. It provides a large number of predefined numerical data types and operators. These types are implemented as C++ classes. Thus, C-XSC allows high-level programming of numerical applications in C and C++. The most important features of C-XSC are: real, complex, interval, and complex interval arithmetic; dynamic vectors and matrices; subarrays of vectors and matrices; dotprecision data types, predefined arithmetic operators with maximum accuracy; standard functions of high accuracy; multiple precision arithmetic and standard functions; rounding control for I/O data; error handling, and library of problem solving routines with automatic result verification. Thus, C-XSC makes the computer more powerful concerning the arithmetic. C-XSC is immediately usable by C programmers, easy to learn, user-extendable, and may also be combined with other tools. The book can be used as a textbook and as a reference manual. It consists of an introduction to advanced computer arithmetic, a chapter describing the programming languages C and C++, the major chapter "C-XSC Reference", sample programs, and indices.
Author: Wade H. Shafer
Publisher: Springer
ISBN: 9780306341205
Category : Science
Languages : en
Pages : 320
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
