Download or read book Les mod les de substitution pour l optimisation rapide des circuits analogiques written by Nawel Drira and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La conception, la synthèse, le dimensionnement et l'optimisation des circuits analogiques sont devenus trop compliqués pour qu'ils soient traités par les méthodes classiques de dimensionnement. Deux techniques sont largement utilisées par les concepteurs pour développer des outils d'aide à la conception, à savoir, la technique d'optimisation basée sur les équations symboliques et la technique d'optimisation basée sur les simulations (connue sous le nom de 'inloop technique'). L'optimisation basée sur les équations est une technique rapide, cependant vu que les fonctions de transfert manipulées sont a fortiori entachées d'erreurs (principalement à cause des composants non-linéaires), ses performances restent limitées surtout pour les circuits complexes. Par contre, l'optimisation basée sur les simulations est très précise, mais en contrepartie elle nécessite de longues durées d'exécution.Dans ce travail, on s'intéresse à l'adaptation de la technique de métamodélisation pour l'analyse des circuits analogiques. La métamodélisation est une technique qui combine les avantages des deux approches de dimensionnement/optimisation citées plus haut. Un intérêt particulier est porté à la technique EGO (Efficient Global Optimization), récemment proposée dans la littérature, vu que cette dernière associe intrinsèquement « modélisation » et « optimisation », ajouté à ceci le fait qu'elle permet aussi la génération de modèles précis, tout en utilisant des bases de données de tailles réduites. C'est ainsi que l'on a étudié de près cette technique et qu'on l'a adaptée pour maximiser les performances de circuits analogiques. Des études comparatives ont été menées pour juger de l'efficacité de cette technique tout en la comparant aux approches classiques.Des améliorations de la technique EGO ont été proposées, à savoir l'intégration dans l'algorithme correspondant du critère 'pseudo expected improvement' pour développer un EGO 'parallèle'. Une seconde amélioration a aussi été proposée dans ce travail et qui consiste en la transformation de la technique EGO, de nature mono-objectif, en une approche multiobjectif en utilisant le critère 'expected improvement matrix'.Toutes les approches proposées ont été validées par application, d'abord sur des fonctions mathématiques de test, puis sur des circuits analogiques. Les résultats obtenus ont été comparés à ceux obtenus par simulation. Des métriques statistiques ont été utilisées à cet effet. Les avantages des approches proposées ont été ainsi mis en relief.

Download or read book Limitations Neurologiques Des Op rations A riennes written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Aerospace Medical Panel. Symposium and published by . This book was released on 1996 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamique Non lin aire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strap down Inertial Systems written by and published by . This book was released on 1978 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Space Systems as Contributors to the NATO Defence Mission written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Aerospace Electromagnetic Compatibility written by Dr. Reinaldo J. Perez and published by John Wiley & Sons. This book was released on 2018-11-30 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive resource that explores electromagnetic compatibility (EMC) for aerospace systems Handbook of Aerospace Electromagnetic Compatibility is a groundbreaking book on EMC for aerospace systems that addresses both aircraft and space vehicles. With contributions from an international panel of aerospace EMC experts, this important text deals with the testing of spacecraft components and subsystems, analysis of crosstalk and field coupling, aircraft communication systems, and much more. The text also includes information on lightning effects and testing, as well as guidance on design principles and techniques for lightning protection. The book offers an introduction to E3 models and techniques in aerospace systems and explores EMP effects on and technology for aerospace systems. Filled with the most up-to-date information, illustrative examples, descriptive figures, and helpful scenarios, Handbook of Aerospace Electromagnetic Compatibility is designed to be a practical information source. This vital guide to electromagnetic compatibility: • Provides information on a range of topics including grounding, coupling, test procedures, standards, and requirements • Offers discussions on standards for aerospace applications • Addresses aerospace EMC through the use of testing and theoretical approaches Written for EMC engineers and practitioners, Handbook of Aerospace Electromagnetic Compatibility is a critical text for understanding EMC for aerospace systems.

Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.

Download or read book Critical Technologies Plan written by and published by . This book was released on 1989 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Use of Analog and Digital Computers in Hydrology Proceedings of the Tucson Symposium written by tucson Symposium on the use of analog and digital computers in hydrology and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Translators Through History written by Jean Delisle and published by John Benjamins Publishing. This book was released on 2012 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acclaimed, when it first appeared, as a seminal work – a groundbreaking book that was both informative and highly readable – Translators through History is being released in a new edition, substantially revised and expanded by Judith Woodsworth. Translators have played a key role in intellectual exchange through the ages and across borders. This account of how they have contributed to the development of languages, the emergence of literatures, the dissemination of knowledge and the spread of values tells the story of world culture itself. Content has been updated, new elements introduced and recent directions in translation scholarship incorporated, providing fresh insights and a more nuanced view of past events. The bibliography contains over 100 new titles and illustrations have been refreshed and enhanced. An invaluable tool for students, scholars and professionals in the field of translation, the latest version of Translators through History remains a vital resource for researchers in other disciplines and a fascinating read for the wider public.

Download or read book Audio Effectiveness in Aviation written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Aerospace Medical Panel. Symposium and published by . This book was released on 1997 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Rotorcraft Technology written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium and published by . This book was released on 1997 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Balancing Automation and Human Action in Nuclear Power Plants written by International Atomic Energy Agency and published by . This book was released on 1991 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inertial Navigation Systems Analysis written by Kenneth Robert Britting and published by GNSS Technology and Applicatio. This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Out-of-print for years, this highly sought-after volume, remains the most popular reference on inertial navigation systems analysis. Finally, this classic book is back in print and readily available only from Artech House. Authored by a pioneer in the field, this authoritative resource focuses on terrestrial navigation, but is also useful for air and sea applications. Packed with valuable, time-saving equations and models, the book helps engineers design optimal navigation systems by comparing the performance of the various types of system mechanizations. Although applications and technology have changed over the years, this book remains the best source for fundamental inertial navigation system knowledge, from notational conventions, reference frames, and geometry of the earth, to unified error analysis, self-alignment techniques, and the development of a system error model. This well-illustrated, timeless reference belongs on the shelf of every practicing engineer working in this area.

Download or read book Plant Ecology written by Unesco and published by . This book was released on 1955 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Historical Dictionary of Iran written by John Henry Lorentz and published by Historical Dictionaries of Asia, Oceania, and the Middle East. This book was released on 2007 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.

Download or read book Physical Climatology written by Williams Sellers and published by . This book was released on 2014-03-11 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is based on a wide range of disciplines, including meteorology, hydrology, watershed and range management, agricultural chemistry and soils, agricultural economics, botany, zoology, electrical and civil engineering, geography, and geochronology. Most of the students are in the Graduate College, and all have had at least an introductory course in meteorology. The mathematical preparation of the students various considerably. Some have carried their training through boundary value problems and complex variables; others have had little more than college algebra and have done poorly in that. To teach a course that would be useful and interesting to all of these students turned out to be almost impossible.