Author: Laurent Colombet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Le but de cette these est d'etudier et developper des methodes pour la parallelisation efficace des applications scientifiques sur machines paralleles a memoire distribuee. Dans une premiere partie nous presentons deux bibliotheques de fonctions de communication PVM (( it Parallel Virtual Machine)) et MPI (( it Message Passing Interface)). Ces dernieres fournissent une portabilite des programmes sur la grande majorite des machines paralleles, mais aussi sur des reseaux d'ordinateurs heterogenes. Cette partie illustre le probleme de la mesure des performances pour des reseaux de processeurs heterogenes. Ceci nous a amene a adapter le calcul du facteur d'acceleration et de l'efficacite afin de pouvoir evaluer les performances d'un algorithme sur un reseau de processeurs heterogenes. La deuxieme partie est consacree a l'etude de bibliotheques numeriques paralleles, comme ScaLAPACK, et au developpement d'une methode etudiee de maniere theorique, mais peu utilisee en pratique pour augmenter les performances des fonctions de ces bibliotheques : le recouvrement calcul/communication. L'idee generale consiste a anticiper les communications, notamment en pipelinant l'envoi des messages. Des resultats experimentaux sur machines Cray T3D et IBM SP1, permettent de valider les etudes theoriques effectuees sur des algorithmes de base de ces bibliotheques.
Author: Laurent Colombet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 160
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Book Description
Le but de cette these est d'etudier et developper des methodes pour la parallelisation efficace des applications scientifiques sur machines paralleles a memoire distribuee. Dans une premiere partie nous presentons deux bibliotheques de fonctions de communication PVM ((\it Parallel Virtual Machine)) et MPI ((\it Message Passing Interface)). Ces dernieres fournissent une portabilite des programmes sur la grande majorite des machines paralleles, mais aussi sur des reseaux d'ordinateurs heterogenes. Cette partie illustre le probleme de la mesure des performances pour des reseaux de processeurs heterogenes. Ceci nous a amene a adapter le calcul du facteur d'acceleration et de l'efficacite afin de pouvoir evaluer les performances d'un algorithme sur un reseau de processeurs heterogenes. La deuxieme partie est consacree a l'etude de bibliotheques numeriques paralleles, comme ScaLAPACK, et au developpement d'une methode etudiee de maniere theorique, mais peu utilisee en pratique pour augmenter les performances des fonctions de ces bibliotheques : le recouvrement calcul/communication. L'idee generale consiste a anticiper les communications, notamment en pipelinant l'envoi des messages. Des resultats experimentaux sur machines Cray T3D et IBM SP1, permettent de valider les etudes theoriques effectuees sur des algorithmes de base de ces bibliotheques.
Author: L. Colombet
Publisher:
ISBN:
Category :
Languages : fr
Pages : 152
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Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 534
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Author:
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ISBN:
Category : Electronic data processing
Languages : en
Pages : 284
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Book Description
Author: Xin-Jun Liu
Publisher: Springer Science & Business Media
ISBN: 3642369294
Category : Technology & Engineering
Languages : en
Pages : 314
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Book Description
Parallel Kinematics- Type, Kinematics, and Optimal Design presents the results of 15 year's research on parallel mechanisms and parallel kinematics machines. This book covers the systematic classification of parallel mechanisms (PMs) as well as providing a large number of mechanical architectures of PMs available for use in practical applications. It focuses on the kinematic design of parallel robots. One successful application of parallel mechanisms in the field of machine tools, which is also called parallel kinematics machines, has been the emerging trend in advanced machine tools. The book describes not only the main aspects and important topics in parallel kinematics, but also references novel concepts and approaches, i.e. type synthesis based on evolution, performance evaluation and optimization based on screw theory, singularity model taking into account motion and force transmissibility, and others. This book is intended for researchers, scientists, engineers and postgraduates or above with interests in robotics and advanced machine tools technology such as parallel kinematics machines (PKMs). Xinjun Liu and Jinsong Wang, professors, work at The Institute of Manufacturing Engineering, Department of Precision Instruments and Mechanology, Tsinghua University.
Author: Dominique Dom Guinard
Publisher: Simon and Schuster
ISBN: 1638357099
Category : Computers
Languages : en
Pages : 520
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Book Description
Summary A hands-on guide that will teach how to design and implement scalable, flexible, and open IoT solutions using web technologies. This book focuses on providing the right balance of theory, code samples, and practical examples to enable you to successfully connect all sorts of devices to the web and to expose their services and data over REST APIs. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. About the Technology Because the Internet of Things is still new, there is no universal application protocol. Fortunately, the IoT can take advantage of the web, where IoT protocols connect applications thanks to universal and open APIs. About the Book Building the Web of Things is a guide to using cutting-edge web technologies to build the IoT. This step-by-step book teaches you how to use web protocols to connect real-world devices to the web, including the Semantic and Social Webs. Along the way you'll gain vital concepts as you follow instructions for making Web of Things devices. By the end, you'll have the practical skills you need to implement your own web-connected products and services. What's Inside Introduction to IoT protocols and devices Connect electronic actuators and sensors (GPIO) to a Raspberry Pi Implement standard REST and Pub/Sub APIs with Node.js on embedded systems Learn about IoT protocols like MQTT and CoAP and integrate them to the Web of Things Use the Semantic Web (JSON-LD, RDFa, etc.) to discover and find Web Things Share Things via Social Networks to create the Social Web of Things Build a web-based smart home with HTTP and WebSocket Compose physical mashups with EVRYTHNG, Node-RED, and IFTTT About the Reader For both seasoned programmers and those with only basic programming skills. About the Authors Dominique Guinard and Vlad Trifa pioneered the Web of Things and cofounded EVRYTHNG, a large-scale IoT cloud powering billions of Web Things. Table of Contents PART 1 BASICS OF THE IOT AND THE WOT From the Internet of Things to the Web of Things Hello, World Wide Web of Things Node.js for the Web of Things Getting started with embedded systems Building networks of Things PART 2 BUILDING THE WOT Access: Web APIs for Things Implementing Web Things Find: Describe and discover Web Things Share: Securing and sharing Web Things
Author: Mikhail S. Tarkov
Publisher: Nova Science Publishers
ISBN: 9781633219571
Category : Parallel programming (Computer science)
Languages : en
Pages : 0
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Book Description
Parallel programming is designed for the use of parallel computer systems for solving time-consuming problems that cannot be solved on a sequential computer in a reasonable time. These problems can be divided into two classes: 1. Processing large data arrays (including processing images and signals in real time); 2. Simulation of complex physical processes and chemical reactions For each of these classes, prospective methods are designed for solving problems. For data processing, one of the most promising technologies is the use of artificial neural networks. Particles-in-cell method and cellular automata are very useful for simulation. Problems of scalability of parallel algorithms and the transfer of existing parallel programs to future parallel computers are very acute now. An important task is to optimise the use of the equipment (including the CPU cache) of parallel computers. Along with parallelising information processing, it is essential to ensure the processing reliability by the relevant organisation of systems of concurrent interacting processes. From the perspective of creating qualitative parallel programs, it is important to develop advanced methods of learning parallel programming. The above reasons are the basis for the creation of this book, chapters of which are devoted to solving these problems. We hope this book will be of interest to researchers, students and all those working in the field of parallel programming and high performance computing.
Author: Jean-Louis Boulanger
Publisher: John Wiley & Sons
ISBN: 1119122481
Category : Technology & Engineering
Languages : en
Pages : 376
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Book Description
CENELEC EN 50128 and IEC 62279 standards are applicable to the performance of software in the railway sector. The 2011 version of the 50128 standard firms up the techniques and methods to be implemented. This is a guide to its implementation, in order to understand the foundations of the standard and how it impacts on the activities to be undertaken, helping towards better a preparation for the independent evaluation phase, which is mandatory.
Author: Pasqua D'Ambra
Publisher: Springer
ISBN: 3642152775
Category : Computers
Languages : en
Pages : 625
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Book Description
Annotation This book constitutes the refereed proceedings of the 16th International Euro-Par Conference held in Ischia, Italy, in August/September 2010. The 90 revised full papers presented were carefully reviewed and selected from 256 submissions. The papers are organized in topical sections on support tools and environments; performance prediction and evaluation; scheduling and load-balancing; high performance architectures and compilers; parallel and distributed data management; grid, cluster and cloud computing; peer to peer computing; distributed systems and algorithms; parallel and distributed programming; parallel numerical algorithms; multicore and manycore programming; theory and algorithms for parallel computation; high performance networks; and mobile and ubiquitous computing.
