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Author : Edouard Ngoya
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (494 download)
Download or read book Contribution a la creation d'outils de CAO des circuits non-lineaires microondes written by Edouard Ngoya and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Edouard Ngoya
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (799 download)
Download or read book Contribution à la création d'outils de C.A.O. des circuits non-linéaires microondes written by Edouard Ngoya and published by . This book was released on 1988 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: RESUME DES PRINCIPALES TECHNIQUES D'ANALYSE NUMERIQUE ET MATRICIELLE DES CIRCUITS NON LINEAIRES. ETUDE DETAILLEE DES TECHNIQUES DE TRANSFORMATION DE FOURIER DISCRETE POUR SIGNAUX QUASI-PERIODIQUES AVEC DES CONTRIBUTIONS ORIGINALES. ETUDE DETAILLEE DE LA TECHNIQUE D'ANALYSE DE CIRCUITS PAR EQUILIBRAGE SPECTRAL. DESCRIPTION FONCTIONNELLE DU SIMULATEUR DE CIRCUITS NON LINEAIRES MICRO-ONDES LISA
Author : Stéphane Dellier
Publisher :
ISBN 13 :
Total Pages : 213 pages
Book Rating : 4.:/5 (799 download)
Download or read book Contributions à la conception des circuits micro-ondes written by Stéphane Dellier and published by . This book was released on 2005 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail traite des différents aspects de la conception des circuits micro-ondes actifs, et plus particulièrement du développement des outils d'assistance à la conception permettant de mettre en oeuvre rapidement des méthodologies avancées tout en gardant le maximum de degrés de liberté pour intégrer de nouvelles connaissances. Les deux parties de ce manuscrit concernent : - la réalisation à 40GHz en technologie pHEMT AsGa d'un driver MMIC de modulateur électro-absorbant InP pour la génération d'impulsions optiques. Une méthodologie de conception de driver de MEA a été développée permettant la prise en compte directe dans la phase de CAO hyperfréquence, du composant optique et de ses caractéristiques. Cette méthodologie a été appliquée dans le cadre d'une collaboration avec Alcatel-Opto+ à la réalisation d'un circuit driver MMIC de commande à 40 GHZ, en technologie pHEMT 0.15 μm AsGa d'OMMIC. Cette réalisation a permis de valider la pertinence de la méthodologie utilisée et a permis de démontrer l'intérêt de la fonction driver+MEA sur InP pour la génération d'impulsions optiques très courtes et avec un fort taux d'extinction à 40 GHz. - le développement d'un outil d'assistance à la conception des circuits micro-ondes. Dans le cadre d'un programme de recherche en collaboration avec le CNES, un assistant à la conception des circuits non linéaires micro-ondes a été développé. L'objectif est de mettre à la disposition des concepteurs, un outil informatique à même de les guider efficacement dans leur démarche de conception et de leur faciliter l'implémentation de méthodes adaptées afin de leur permettre de passer plus de temps sur les problèmes de conception et le développement de solutions innovantes
Author : Mustapha C. E.. Yagoub
Publisher :
ISBN 13 :
Total Pages : 51 pages
Book Rating : 4.:/5 (49 download)
Download or read book Contribution à l'optimisation de circuits microondes non linéaires written by Mustapha C. E.. Yagoub and published by . This book was released on 1994 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA CONCEPTION DE CIRCUITS MICRO-ONDES NON LINEAIRES S'EST DEVELOPPEE DE MANIERE CONSIDERABLE DURANT CES DERNIERES ANNEES. DES COMPOSANTS ONT ETE SIMULES ET DES METHODES D'ANALYSE ONT ETE MISES EN UVRE POUR ATTEINDRE LES PERFORMANCES DESIREES. DE PLUS, UNE ETAPE D'OPTIMISATION S'EST AVEREE NECESSAIRE CAR LA THEORIE DES CIRCUITS NON LINEAIRES NE PERMET PAS D'INDIQUER DE PRIME ABORD LES TOPOLOGIES OPTIMALES CORRESPONDANT A UNE FONCTION NON LINEAIRE DONNEE. COMME L'OPTIMISATION A TOPOLOGIE FIXEE N'EST PRATIQUEMENT UTILISEE QUE POUR OPTIMISER UN SEUL ELEMENT A LA FOIS, C'EST VERS L'OPTIMISATION D'UN COMPOSANT SELON SA CARACTERISTIQUE, SANS IMPOSER DE TOPOLOGIE, QUE S'ORIENTENT LES RECHERCHES. LE PRINCIPE EST DE FIXER LES TENSIONS A L'ENTREE DU COMPOSANT NON LINEAIRE AFIN DE DETERMINER LES COURANTS OPTIMA ET PAR LA MEME LES CHARGES OPTIMALES CORRESPONDANTES. CEPENDANT, CETTE APPROCHE EST NUMERIQUE ET DONC SPECIFIQUE A CHAQUE TYPE DE FONCTION NON LINEAIRE A OPTIMISER. NOUS AVONS ALORS DEVELOPPE UNE APPROCHE D'OPTIMISATION SIMILAIRE PUISQU'ELLE CONSISTE A DETERMINER LES CHARGES OPTIMALES DE L'ELEMENT ACTIF SANS TOPOLOGIE IMPOSEE. L'INTERET DE LA METHODE RESIDE DANS LE FAIT QUE LA DEMARCHE EST ANALYTIQUE, DONC INDEPENDANTE DE LA FONCTION NON LINEAIRE A OPTIMISER. ELLE SE BASE SUR LA DETERMINATION, DANS L'ESPACE DES PUISSANCES, D'UNE SURFACE APPELEE SURFACE CARACTERISTIQUE RENFERMANT TOUTES LES PUISSANCES PERMISES AUX PORTES DE L'ELEMENT NON LINEAIRE AFIN D'EN DEDUIRE LES PUISSANCES OPTIMALES ET PAR LA MEME LES CHARGES OPTIMALES CORRESPONDANTES. APPLIQUEE AUX MULTIPLICATEURS DE FREQUENCE, NOTRE APPROCHE A DONNE DES RESULTATS SATISFAISANTS
Author : Madjid Benayada
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (799 download)
Download or read book Contribution à la création d'outils de C.A.O. des circuits et systèmes microondes written by Madjid Benayada and published by . This book was released on 2000 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LE DOMAINE DE LA CONCEPTION DES CIRCUITS ET DES SYSTEMES MICROONDES, LE RECOURS A LA C.A.O. EST UNE ETAPE INCONTOURNABLE. CEPENDANT, LA PRISE EN COMPTE DES DIFFERENTES INTERACTIONS, LORS DE LA CONCEPTION, NECESSITE LA MISE EN UVRE DE SUPPORTS DE DESCRIPTION BASES SUR DE NOUVEAUX FORMALISMES. DANS LE PREMIER CHAPITRE, NOUS EXPOSONS LES METHODOLOGIES EXISTANTES DE CONCEPTION AINSI QUE LA PROBLEMATIQUE ASSOCIEE. LA SUITE DU CHAPITRE EST CONSACREE A LA PRESENTATION ET A L'ETUDE DES LANGAGES DE DESCRIPTION DES SYSTEMES ANALOGIQUES TEL QUE VHDL-A ET MHDL. DANS LE DEUXIEME CHAPITRE, DES SPECIFICATIONS D'UNE NOUVELLE APPROCHE POUR UN LANGAGE DE DESCRIPTION OPERANT SUR DES DOMAINES VARIES SONT PRESENTEES, CE LANGAGE EST BASE SUR L'UTILISATION D'UN MODELE GENERIQUE A PLUSIEURS DIMENSIONS. LES REGLES DE MISE EN INTERFACE ET DE CONNEXION ENTRE OBJETS AINSI QUE LE STOCKAGE DES DONNEES SONT EXPOSES EN DETAIL. LA SOLUTION RETENUE POUR LE STOCKAGE DES INFORMATIONS SOUS FORME D'OBJET EST INTERESSANTE. CONTRAIREMENT A LA METHODE TRADITIONNELLE, CETTE SOLUTION PERMET DE GARDER TOUTE L'INFORMATION DU MODELE ET FOURNIT UNE REPRESENTATION UNIQUE DE CELLE-CI. LE MODELE DE LA STRUCTURE ETANT BIEN DEFINI, L'UTILISATION D'UNE BASE DE DONNEES ORIENTEE OBJET EST DEVENUE RELATIVEMENT SIMPLE, ET REPRESENTE UN CHOIX APPROPRIE. DANS LE TROISIEME CHAPITRE, LES METHODES ET LES OUTILS INFORMATIQUES A METTRE EN UVRE POUR LA CONCEPTION DE L'ENVIRONNEMENT DE GESTION DES INFORMATIONS SONT EXPOSEES. LES METHODES DE CONCEPTION ORIENTEES OBJET SONT DETAILLEES. LE SYSTEME DE GESTION DE BASE DE DONNEES, EN PARTICULIER LE SYSTEME DE GESTION DES BASES DE DONNEES 02, EST EGALEMENT DEVELOPPE. LE QUATRIEME CHAPITRE EXPLOITE LES OUTILS DECRITS PRECEDEMMENT POUR DEVELOPPER ET VALIDER L'APPLICATION PAR L'IMPLANTATION DES DIFFERENTS MODULES. PLUSIEURS CLASSES ONT ETE DEFINIES POUR REPRESENTER LES VUES HIERARCHIQUES DU SYSTEME A DIFFERENTS NIVEAUX D'ABSTRACTION. LE TRAITEMENT DE LA DESCRIPTION TEXTUELLE EST TRAITE PAR DES OUTILS DE COMPILATION DEVELOPPES DANS CE BUT.
Author : MARIE-JOSE.. VILLARD
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (799 download)
Download or read book CONTRIBUTION A LA MODELISATION NON LINEAIRE DES TECS POUR LA C.A.O. DES CIRCUITS MONOLITHIQUES MICROONDES written by MARIE-JOSE.. VILLARD and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS NOUS SOMMES INTERESSES A LA MODELISATION NON LINEAIRE DES GENERATEURS DE COURANT DES TECS ASGA POUR LA C.A.O. DES CIRCUITS MONOLITHIQUES MICROONDES. CETTE MODELISATION, QUI IMPLIQUE UNE CARACTERISATION PRENANT EN COMPTE LES CONDITIONS DE FONCTIONNEMENT DU TEC DANS LE CIRCUIT (PHENOMENES THERMIQUES ET DE PIEGEAGE DES ELECTRONS), EST BASEE QUE DES MESURES EN IMPULSIONS. L'INSTALLATION PUIS L'AUTOMATISATION D'UN BANC DE MESURES EN IMPULSIONS A PERMIS D'ETUDIER PRINCIPALEMENT LES LOIS D'ECHELLE SUR LES COURANTS NON LINEAIRES EN FONCTION DE LA TAILLE DU COMPOSANT, L'EVOLUTION DE CES COURANTS AVEC LA TEMPERATURE DU MILIEU AMBIANT, LA CONDUCTANCE DE SORTIE SELON LE TYPE DE MESURES EFFECTUEES (DC, IMPULSIONS, HYPERFREQUENCES). CES ETUDES ONT APPORTE DES RENSEIGNEMENTS SUR LE PIEGEAGE DES ELECTRONS QUI APPARAIT COMME UN PHENOMENE PROPORTIONNEL A LA TAILLE DU TEC ET REAGISSANT DE FACON LINEAIRE AVEC LA TEMPERATURE DU MILIEU AMBIANT ALORS QU'IL SEMBLE REAGIR DE MANIERE PLUS COMPLEXE AVEC LES TENSIONS DE POLARISATION. NOTRE PROCEDURE DE CARACTERISATION GRAND SIGNAL A ETE VALIDEE GRACE A LA CONCEPTION DE FONCTIONS MMIC NON LINEAIRES
Author : Don Montague
Publisher : Taylor & Francis
ISBN 13 : 9780419199106
Total Pages : 472 pages
Book Rating : 4.1/5 (991 download)
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author : Alexander V. Sergienko
Publisher : CRC Press
ISBN 13 : 1420026607
Total Pages : 248 pages
Book Rating : 4.4/5 (2 download)
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.
Author : Krishnanand N. Kaipa
Publisher : Springer
ISBN 13 : 3319515950
Total Pages : 265 pages
Book Rating : 4.3/5 (195 download)
Download or read book Glowworm Swarm Optimization written by Krishnanand N. Kaipa and published by Springer. This book was released on 2017-01-10 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Agnes Buka
Publisher : World Scientific
ISBN 13 : 1848167997
Total Pages : 299 pages
Book Rating : 4.8/5 (481 download)
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author : Reginald Biddle
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.3/5 (121 download)
Download or read book Marketing in Zambia written by Reginald Biddle and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sarah Bridger
Publisher : Harvard University Press
ISBN 13 : 067442610X
Total Pages : 363 pages
Book Rating : 4.6/5 (744 download)
Download or read book Scientists at War written by Sarah Bridger and published by Harvard University Press. This book was released on 2015-04-06 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists at War examines the ethical debates that severely tested the American scientific community during the Cold War. Sarah Bridger highlights the contributions of scientists to military technologies and strategic policymaking, from the dawning atomic age in the 1940s through the Strategic Defense Initiative (“Star Wars”) in the 1980s, which sparked a cross-generational opposition among scientists. The Manhattan Project in the early 1940s and the crisis provoked by the launch of Sputnik in 1957 greatly enhanced the political clout of American scientists. Yet many who took up government roles felt a duty to advocate arms control. Bridger investigates the internal debate over nuclear weapons policy during the Eisenhower and Kennedy administrations, when scientific advisors did not restrict themselves to technical assessments but made an impassioned moral case for a nuclear test ban. The relationship between government and science began to fray further during the Vietnam War, as younger scientists inside and outside of government questioned the morality of using chemical defoliants, napalm, and other non-nuclear weapons. With campuses erupting in protest over classified weapons research conducted in university labs, many elder statesmen of science, who once believed they could wield influence from within, became alienated. The result was a coalition that opposed “Star Wars” during the 1980s—and a diminished role for scientists as counselors to future presidents.
Author : Safa Kasap
Publisher : Cambridge University Press
ISBN 13 : 113964372X
Total Pages : 862 pages
Book Rating : 4.1/5 (396 download)
Download or read book Cambridge Illustrated Handbook of Optoelectronics and Photonics written by Safa Kasap and published by Cambridge University Press. This book was released on 2009-06-11 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt: From fundamental concepts to cutting-edge applications, this is the first encyclopaedic reference of important terms and effects in optoelectronics and photonics. It contains broad coverage of terms and concepts from materials to optical devices and communications systems. Self-contained descriptions of common tools and phenomena are provided for undergraduate and graduate students, scientists, engineers and technicians in industry and laboratories. The book strikes a balance between materials and devices related coverage and systems level terms, and captures key nomenclature used in the field. Equations are used where necessary, and lengthy derivations are avoided. Over 600 clear and self-explanatory illustrations are used to help convey key concepts, and enable readers to quickly grasp important concepts.
Author : Donald Avery
Publisher : University of Toronto Press
ISBN 13 : 9780802059963
Total Pages : 450 pages
Book Rating : 4.0/5 (599 download)
Download or read book The Science of War written by Donald Avery and published by University of Toronto Press. This book was released on 1998-01-01 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second World War, with its emphasis on innovative weapons and defence technology, brought about massive changes in the role of scientists in Canada, the United States, and Great Britain. Canadian scientists, working through the auspices of the National Research Council and the Department of National Defence, made important contributions to the development of alliance warfare. Before 1939, Canada had only a minute military establishment and a limited industrial and academic capacity for research and development. With the outbreak of war, all this changed dramatically. This book explains how and why Canada was able to play in the big leagues of military technology, including the development of radar, RDX explosives, proximity fuses, chemical and biological warfare, and the atomic bomb. It also investigates the evolution of the Canadian national security state, which attempted to protect defence secrets both from the Axis powers and from Canada's wartime ally, the Soviet Union. The Science of War provides both a cross-disciplinary overview of the scientific and military activity of this period in several countries and a fascinating analysis of what the author calls 'Big Science' in Canada.
Author :
Publisher :
ISBN 13 :
Total Pages : 172 pages
Book Rating : 4.3/5 (91 download)
Download or read book Exportateur Americain written by and published by . This book was released on 1912 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jean Goubault-Larrecq
Publisher : Springer Science & Business Media
ISBN 13 : 9781402003684
Total Pages : 448 pages
Book Rating : 4.0/5 (36 download)
Download or read book Proof Theory and Automated Deduction written by Jean Goubault-Larrecq and published by Springer Science & Business Media. This book was released on 2001-11-30 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in computer applications has led to a new attitude to applied logic in which researchers tailor a logic in the same way they define a computer language. In response to this attitude, this text for undergraduate and graduate students discusses major algorithmic methodologies, and tableaux and resolution methods. The authors focus on first-order logic, the use of proof theory, and the computer application of automated searches for proofs of mathematical propositions. Annotation copyrighted by Book News, Inc., Portland, OR
Author : David Zimmerman
Publisher : McGill-Queen's Press - MQUP
ISBN 13 : 9780773514010
Total Pages : 280 pages
Book Rating : 4.5/5 (14 download)
Download or read book Top Secret Exchange written by David Zimmerman and published by McGill-Queen's Press - MQUP. This book was released on 1996 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tizard Mission was one of the key events in the forging of the Anglo-American alliance in World War II. Led by Sir Henry Tizard, the mission visited the United States and Canada in the summer of 1940 to make available virtually all of Britain's technical and scientific military secrets. Overwhelmed by British generosity, the U.S. reciprocated. David Zimmerman tells the story of that mission and examines the importance of technology in modern war and its crucial role in the defeat of the Axis powers.
