Download or read book Contribution la Mod lisation Comportementale Des Circuits Rf written by Ahmed Fakhfakh and published by Omniscriptum. This book was released on 2011 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Depuis 1987, la conception num rique a subi une importante mutation gr ce l'apport du langage de mod lisation VHDL. Ce langage a autoris une conception descendante TOP-DOWN et on a vu ainsi appara tre, avec les outils de synth se, l'automatisation d'un grand nombre d' tapes du process de conception. Au contraire, le domaine de l'analogique n'a pas connu une telle volution. Avec la n cessit d'int grer sur un m me chip des syst mes de plus en plus complexes, comprenant la fois des fonctions num riques et analogiques, a amen les industriels se tourner vers l'utilisation d'une m thodologie de conception hi rarchique qui permet de r duire les temps de conception, de faciliter la r utilisation de blocs analogiques d j valid s et d'acc l rer les simulations. A terme, on peut penser aussi la cr ation d'outils de synth se en analogique comme cela se fait d j en num rique. Les travaux pr sent s dans ce livre apportent donc une contribution la mod lisation comportementale des circuits RF en termes de m thodologie et de d veloppement de biblioth ques de mod les standard, indispensables l' volution du flot de conception analogique Top-Down.

Download or read book Contribution la mod lisation comportementale des circuits radio fr quence written by Ahmed Fakhfakh and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avec les nouvelles tendances que sont les System-on-Chip (SoC) et les ASIC mixtes, les outils de CAO analogiques doivent évoluer pour permettre une conception hiérarchique, basée sur la ré-utilisation de blocs, utilisant largement la modélisation comportementale des circuits. L'avènement des langages de description standards pour les circuits analogiques et mixtes (VHDL-AMS par exemple) ouvre la voie à l'amélioration attendue mais il reste à développer divers méthodes et outils. Les travaux présentés dans ce mémoire apportent une contribution à la modélisation comportementale des circuits analogiques et mixtes en termes de méthodologie et de développement de bibliothèques de modèles standards. Ainsi, nous proposons une méthode systématique de modélisation comportementale, une bibliothèque de modèles pour les circuits RF et une étude du bruit de phase aboutissant à une modélisation de ce phénomène dans les oscillateurs.

Download or read book Contribution la mod lisation comportementale des circuits analogiques written by Noëlle Milet-Lewis and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analyse du comportement petit signal du transistor MOS written by Emmanuel Bouhana and published by . This book was released on 2007 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'explosion des moyens de communication sans fil durant les quinze dernières années, ainsi que les services nécessitant des communications à haut débit ont conduit l'industrie du semiconducteur à s'intéresser de plus en plus au circuit intégré pour des applications analogiques radio-fréquences. Les dispositifs réalisés en technologie CMOS présentent aujourd'hui des performances les rendant intéressants pour la conception de circuits RF. Or, la plupart des modèles disponibles actuellement ne sont pas adaptés aux besoins des applications RF, et ne peuvent donc pas être utilisés tels quels pour la conception de tels circuits. Afin d'améliorer la connaissance et la modélisation du MOSFET pour ce type d'applications, nous avons développé, au cours de ces travaux de thèse, de nouvelles méthodes d'analyse de la partie extrinsèque du transistor MOS, basées sur la mesure de paramètres S, et sur une connaissance approfondie de la théorie du MOSFET et de sa technologie. Ces méthodes consistent à isoler les éléments extrinsèques pour les étudier et connaître leurs effets. Elles permettent une extraction et une modélisation rigoureuses de composantes telles que la résistance de grille ou le réseau substrat, dont l'influence au premier ordre sur le comportement RF du transistor a été mise en évidence. Elles ont également conduit à montrer l'existence d'effets haute fréquence de second ordre induits par ces éléments parasites du dispositif, et montrent l'évolution grandissante de leur impact, au fil des générations technologiques, sur les performances RF du composant.

Download or read book Contribution la mod lisation comportementale des amplificateurs de puissance utilis s en communications radio mobiles written by Frédéric Launay and published by . This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: La thèse présentée concerne le développement d'un modèle comportemental des amplificateurs de puissance micro-onde. L'objectif est d'obtenir un modèle de l'amplificateur de puissance permettant de rendre compte des performances globales d'une chaîne de communication pour des signaux de modulation numérique (simulation système) à partir de données expérimentales ou simulées en mono-porteuse ou bi-porteuses. A partir d'un modèle générique, dit sans mémoire, nous avons peu à peu affiné la modélisation du comportement de l'amplificateur pour rendre compte, dans un premier temps, des effets de mémoire HF puis, dans un second temps, des effets de mémoires HF et BF. Ainsi, le modèle développé permet de ren-dre compte des performances d'un amplificateur fonctionnant dans un contexte de communica-tion à large bande et à haut débit. Nous avons complété l'étude de la modélisation par une formulation analytique rigoureuse permettant de caractériser quantitativement le rehaussement spectral d'un signal modulé (AC-PR), utilisé en communication mobile, en sortie de l'amplificateur de puissance.

Download or read book Contribution au test des circuits mixtes written by Pascal Caunègre and published by . This book was released on 1996 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES RECHERCHES PRESENTES DANS CETTE THESE CONTRIBUENT AU TEST DES CIRCUITS ANALOGIQUES OU MIXTES PAR L'ETUDE DES MODELES DE FAUTES ET PAR LA REALISATION D'OUTILS DE SIMULATION DE FAUTES. LES DEFAUTS PHYSIQUES SURVENANT LORS DE LA FABRICATION DES CIRCUITS SONT INVENTORIES. DIFFERENTS MODELES ET TECHNIQUES D'INJECTION DE FAUTES PERMETTANT DE SIMULER CES DEFAUTS DANS LES CIRCUITS ANALOGIQUES SONT ENVISAGES ET EVALUES A L'AIDE DE CIRCUITS A BASE DE TRANSISTORS MOS OU BIPOLAIRES. L'EFFET CES DEFAUTS SUR UNE CELLULE LOGIQUE EST ANALYSE ET L'ADEQUATION DE MODELES DE FAUTES LOGIQUES EXISTANTS EST ETUDIEE. DE NOUVEAUX MODELES SONT INTRODUITS ET LA CONSTRUCTION D'UN CATALOGUE DE MODELES DE FAUTES EST PROPOSEE. LES COURT-CIRCUITS INTERVENANT ENTRE LES SIGNAUX ISSUS DE DEUX CELLULES LOGIQUES SONT TRAITES PAR UNE METHODE FAISANT INTERVENIR UN SIMULATEUR MIXTE ET DES MODELES COMPORTEMENTAUX DE CELLULE LOGIQUES. CETTE ETUDE EST EGALEMENT ETENDUE AUX COURT-CIRCUITS DANS LES CIRCUITS MIXTES. DES MODELES COMPORTEMENTAUX DE SYSTEMES DE TEST ANALOGIQUE SONT REALISES ET PERMETTENT DE CONCEVOIR UN BANC DE TEST VIRTUEL AIDANT A L'ECRITURE DES VECTEURS DE TEST. DES OUTILS DE SIMULATION DE FAUTES POUR CIRCUITS ANALOGIQUES OU MIXTES SONT DEVELOPPES PERMETTANT DE MESURER LE TAUX DE COUVERTURE DE FAUTES DU TEST ET DE SELECTIONNER LES VECTEURS DE TEST. L'ANALYSE DE LA SENSIBILITE DES MESURES AUX PARAMETRES DU CIRCUIT EST AUSSI MISE A PROFIT POUR CALCULER LE TAUX DE COUVERTURE DES FAUTES PARAMETRIQUES POUR DES CIRCUITS LINEAIRES

Download or read book CONTRIBUTION A LA MODELISATION COMPORTEMENTALE DES COMPOSANTS DE PUISSANCE EN COMMUTATION written by KAMEL.. BESBES and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CONSTRUCTION DE NOUVEAUX MODELES POUR LES DIODES ET LES TRANSISTOR MOS DE PUISSANCE, PERMETTANT D'AMELIORER L'ETUDE DES CIRCUITS ASSOCIANT CES DEUX COMPOSANTS

Download or read book Innovation in Information Systems and Technologies to Support Learning Research written by Mohammed Serrhini and published by Springer Nature. This book was released on 2019-11-30 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides glimpses into contemporary research in information systems & technology, learning, artificial intelligence (AI), machine learning, and security and how it applies to the real world, but the ideas presented also span the domains of telehealth, computer vision, the role and use of mobile devices, brain–computer interfaces, virtual reality, language and image processing and big data analytics and applications. Great research arises from asking pertinent research questions. This book reveals some of the authors’ “beautiful questions” and how they develop the subsequent “what if” and “how” questions, offering readers food for thought and whetting their appetite for further research by the same authors.

Download or read book Power Electronics Semiconductor Devices written by Robert Perret and published by John Wiley & Sons. This book was released on 2013-03-01 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book relates the recent developments in several key electrical engineering R&D labs, concentrating on power electronics switches and their use. The first sections deal with key power electronics technologies, MOSFETs and IGBTs, including series and parallel associations. The next section examines silicon carbide and its potentiality for power electronics applications and its present limitations. Then, a dedicated section presents the capacitors, key passive components in power electronics, followed by a modeling method allowing the stray inductances computation, necessary for the precise simulation of switching waveforms. Thermal behavior associated with power switches follows, and the last part proposes some interesting prospectives associated to Power Electronics integration.

Download or read book Brain Computer Interfaces Handbook written by Chang S. Nam and published by CRC Press. This book was released on 2018-01-09 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brain–Computer Interfaces Handbook: Technological and Theoretical Advances provides a tutorial and an overview of the rich and multi-faceted world of Brain–Computer Interfaces (BCIs). The authors supply readers with a contemporary presentation of fundamentals, theories, and diverse applications of BCI, creating a valuable resource for anyone involved with the improvement of people’s lives by replacing, restoring, improving, supplementing or enhancing natural output from the central nervous system. It is a useful guide for readers interested in understanding how neural bases for cognitive and sensory functions, such as seeing, hearing, and remembering, relate to real-world technologies. More precisely, this handbook details clinical, therapeutic and human-computer interfaces applications of BCI and various aspects of human cognition and behavior such as perception, affect, and action. It overviews the different methods and techniques used in acquiring and pre-processing brain signals, extracting features, and classifying users’ mental states and intentions. Various theories, models, and empirical findings regarding the ways in which the human brain interfaces with external systems and environments using BCI are also explored. The handbook concludes by engaging ethical considerations, open questions, and challenges that continue to face brain–computer interface research. Features an in-depth look at the different methods and techniques used in acquiring and pre-processing brain signals, extracting features, and classifying the user's intention Covers various theories, models, and empirical findings regarding ways in which the human brain can interface with the systems or external environments Presents applications of BCI technology to understand various aspects of human cognition and behavior such as perception, affect, action, and more Includes clinical trials and individual case studies of the experimental therapeutic applications of BCI Provides human factors and human-computer interface concerns in the design, development, and evaluation of BCIs Overall, this handbook provides a synopsis of key technological and theoretical advances that are directly applicable to brain–computer interfacing technologies and can be readily understood and applied by individuals with no formal training in BCI research and development.

Download or read book The Soar Cognitive Architecture written by John E. Laird and published by MIT Press. This book was released on 2019-08-20 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive presentation of Soar, one AI's most enduring architectures, offering comprehensive descriptions of fundamental aspects and new components. In development for thirty years, Soar is a general cognitive architecture that integrates knowledge-intensive reasoning, reactive execution, hierarchical reasoning, planning, and learning from experience, with the goal of creating a general computational system that has the same cognitive abilities as humans. In contrast, most AI systems are designed to solve only one type of problem, such as playing chess, searching the Internet, or scheduling aircraft departures. Soar is both a software system for agent development and a theory of what computational structures are necessary to support human-level agents. Over the years, both software system and theory have evolved. This book offers the definitive presentation of Soar from theoretical and practical perspectives, providing comprehensive descriptions of fundamental aspects and new components. The current version of Soar features major extensions, adding reinforcement learning, semantic memory, episodic memory, mental imagery, and an appraisal-based model of emotion. This book describes details of Soar's component memories and processes and offers demonstrations of individual components, components working in combination, and real-world applications. Beyond these functional considerations, the book also proposes requirements for general cognitive architectures and explicitly evaluates how well Soar meets those requirements.

Download or read book Consuming Experience written by Antonella Carù and published by Routledge. This book was released on 2007 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on the consumption experience, the way it happens, and on the phenomenon of consumer experience. The authors highlight the need to let the consumers construct their own experiences.

Download or read book Power GaN Devices written by Matteo Meneghini and published by Springer. This book was released on 2016-09-08 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the first comprehensive overview of the properties and fabrication methods of GaN-based power transistors, with contributions from the most active research groups in the field. It describes how gallium nitride has emerged as an excellent material for the fabrication of power transistors; thanks to the high energy gap, high breakdown field, and saturation velocity of GaN, these devices can reach breakdown voltages beyond the kV range, and very high switching frequencies, thus being suitable for application in power conversion systems. Based on GaN, switching-mode power converters with efficiency in excess of 99 % have been already demonstrated, thus clearing the way for massive adoption of GaN transistors in the power conversion market. This is expected to have important advantages at both the environmental and economic level, since power conversion losses account for 10 % of global electricity consumption. The first part of the book describes the properties and advantages of gallium nitride compared to conventional semiconductor materials. The second part of the book describes the techniques used for device fabrication, and the methods for GaN-on-Silicon mass production. Specific attention is paid to the three most advanced device structures: lateral transistors, vertical power devices, and nanowire-based HEMTs. Other relevant topics covered by the book are the strategies for normally-off operation, and the problems related to device reliability. The last chapter reviews the switching characteristics of GaN HEMTs based on a systems level approach. This book is a unique reference for people working in the materials, device and power electronics fields; it provides interdisciplinary information on material growth, device fabrication, reliability issues and circuit-level switching investigation.

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 Synaptic Plasticity written by M. Baudry and published by MIT Press. This book was released on 1993 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date overview of the current status of research on the full scope of synaptic plasticity, including synaptic remodeling in response to damage, long-term depression and long-term potentiation, and learning and memory.Synaptic Plasticity presents an up-to-date overview of the current status of research on the full scope of synaptic plasticity, including synaptic remodeling in response to damage, long-term depression and long-term potentiation, and learning and memory. The contributions are written by leading experts in the field and cover approaches from biochemical, anatomical, physiological, behavioral, and computational levels. They offer hypotheses concerning the molecular and cellular mechanisms that are responsible for the various manifestations of synaptic plasticity and propose models explaining how these cellular events can be linked to the functional and behavioral expressions of these adaptive principles. ContentsIntroduction - Molecular Correlates of Activity-dependent Development and Synaptic Plasticity, S. Hockfield - Molecular Sorting in Neurons, 0. Steward - Molecular and Morphological Responses to Deafferentation in Rodents, C. E. Finch, T. H. McNeill - Forms of Long-term Potentiation Induced by NMDA and Non-NMDA Receptor Activation, T. Teyler, L. Grover - Long-term Potentiation: Biochemical Mechanisms, M. Baudry, G. Lynch - Cerebellar Mechanisms of Long-Term Depression, M. Ito - Long-term Depression: Related Mechanisms in Cerebellum, Neocortex, and Hippocampus, A. Artola, W. Singer - Theory of Synaptic Plasticity in Visual Cortex, N. Intrator, M. F. Bear, L. N. Cooper, M. A. Paradiso - A Theoretical and Experimental Strategy for Realizing a Biologically Based Model of the Hippocampus, T. W. Berger et al - Synaptic Plasticity, Learning, and Memory, S. P. Rose - Synaptic Plasticity and Memory Storage, R. F. Thompson et al

Download or read book Economic Empowerment Of Women In The Islamic World Theory And Practice written by Toseef Azid and published by World Scientific. This book was released on 2020-06-22 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book, Economic Empowerment of Women in the Islamic World, discusses the economic, social, and political rights and status of women in Islam, which is theoretically given by the Islamic Jurisprudence (Shariah law). The chapters in this volume will address historical practices in comparison to the status of women in the contemporary Muslim world. Men and women in Islam, regardless of their age, social class, and education, are equal as citizens and individuals, but not identical in their rights and responsibilities. It can be observed from Islamic history that in the early age of Islam, women were given full confidence, trust, and high responsibilities in leadership, educational guidance, and decision-making.This volume will try to clarify the confusion in the status of the women in Islam that is presented by the media, as it is assumed that theoretical Islamic empowerment of women bears little relation to the real conditions of women in modern Muslim societies. It has been widely claimed in the media that Muslim women suffer more than men in Muslim societies and communities in terms of insecurity, domestic abuse, and low access to education and medical care. It is also stated in the press and media that absence of good governance also results in gender inequality and violation of the rights of Muslim women.This volume also aims to provide the solutions for the empowerment of women in the Islamic world. We assumed that without good governance, the status of women is not likely to improve. Muslim women have the potential to play a fundamental role in curbing corruption, social ills, violence, and crime in the Muslim world. This volume will make the case that in order to achieve stability and prosperity, the government must ensure a platform for women to participate in decision-making and hence benefit from the rights they are accorded in Islam.By covering a range of perspectives on the economic lives of Muslim women around the world, it hopes to shed light on the problems faced and to offer possible solutions to the empowerment of women in the Islamic world.

Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.