Download or read book SONDAGE ELECTRO OPTIQUE DE CIRCUITS INTEGRES HYPERFREQUENCES written by PHILIPP OLIVER.. MULLER and published by . This book was released on 1997 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE DE THESE PRESENTE LE DEVELOPPEMENT D'UN SYSTEME DE SONDAGE ELECTRO-OPTIQUE INTERNE A FAISCEAU CONTINU, UTILISANT UN LASER A SEMI-CONDUCTEUR ET DES COMPOSANTS FIBREES. GRACE AU CONTROLE DE LA LONGUEUR D'ONDE DU FAISCEAU SONDE, LA SENSIBILITE DE LA MESURE EST MAXIMISEE ET LES VALEURS DE TENSION LOCALE SUR L'ELEMENT SOUS TEST SONT CALIBREES. UNE DISCUSSION GENERALE DE LA THEORIE DU SIGNAL ELECTRO-OPTIQUE SOUS INFLUENCE DES EFFETS DES MULTIPLES REFLEXIONS A L'INTERIEUR DE L'ELEMENT SOUS TEST CONCLUT A L'EXISTENCE DE DEUX SIGNAUX ELECTRO-OPTIQUE D'ORIGINE DIFFERENTE : UNE VARIATION DE L'ETAT DE POLARISATION DUE A LA DIFFERENCE DE PHASE ENTRE LES COMPOSANTES DE CHAMP DU FAISCEAU SONDE, ET UNE MODULATION D'AMPLITUDE DU CHAMP PROVENANT DES INTERFERENCES DE LA LUMIERE MODULEE EN PHASE. L'ETUDE DU SIGNAL MODULE EN AMPLITUDE AMENE A UNE NOUVELLE METHODE DE CALIBRAGE QUI PERMET DE DETERMINER LA TENSION LOCALE SUR L'ELEMENT SOUS TEST. CETTE METHODE EST VERIFIEE EXPERIMENTALEMENT. LA NOUVELLE CONCEPTION D'UN SYSTEME FIBRE EST BASEE SUR UNE DETECTION DU SIGNAL ELECTRO-OPTIQUE MODULE EN AMPLITUDE. LA TETE DE MESURE, QUI DETERMINE L'INJECTION DU FAISCEAU SONDE DANS LE SUBSTRAT DE L'ELEMENT SOUS TEST, CONSISTE EN DEUX LENTILLES DANS UNE CONFIGURATION CONFOCALE. UNE ETUDE DETAILLEE DU FILTRAGE SPATIALE EFFECTUE PAR UNE TELLE CONFIGURATION PERMET DE COMPRENDRE L'INFLUENCE DE LA TETE DE MESURE SUR LE SIGNAL ELECTRO-OPTIQUE. LA DISCUSSION DE L'OPTIMISATION DES PERFORMANCES DU NOUVEAU SYSTEME DE SONDAGE ELECTRO-OPTIQUE AMENE A L'INTEGRATION D'UN AMPLIFICATEUR A FIBRE DOPEE ERBIUM (EDFA) AFIN D'AUGMENTER LA SENSIBILITE DE MESURE DU SYSTEME. UNE AUTOMATISATION COMPLETE DU BALAYAGE EN DEUX DIMENSIONS PERMET DE VISUALISER LA DISTRIBUTION DU POTENTIEL ELECTRIQUE SUR L'ELEMENT SOUS TEST.

Download or read book Sondage lectro optique de circuits int gr s avec des lasers semi conducteurs en fonctionnement continu written by Quang Dai Le and published by . This book was released on 1995 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE PRESENTE LA REALISATION ET LA CARACTERISATION D'UN SYSTEME DE SONDAGE ELECTRO-OPTIQUE FONDE SUR L'UTILISATION D'UN LASER A SEMI-CONDUCTEURS FONCTIONNANT EN REGIME CONTINU. ELLE COMMENCE DONC PAR UN RAPPEL DE L'EFFET ELECTRO-OPTIQUE LINEAIRE (EFFET POCKELS) SUR LEQUEL EST BASEE CETTE METHODE DE SONDAGE. ENSUITE, LES MONTAGES EXPERIMENTAUX MIS EN PLACE SONT PRESENTES EN VUE DE TESTER DES CIRCUITS INTEGRES MICRO-ONDES. L'UTILISATION D'UN LASER CONTINU ET UNE DETECTION DIRECTE PERMET DE REALISER UN DISPOSITIF DE TEST TRES COMPACT ET MOINS COUTEUX QUE LES SYSTEMES UTILISANT LA TECHNIQUE D'ECHANTILLONNAGE. LE TROISIEME CHAPITRE EST CONSACRE A UNE ETUDE THEORIQUE DES PERFORMANCES DU SYSTEME QUI, A L'EXCEPTION DE LA RESOLUTION SPATIALE, SONT ETROITEMENT LIEES A LA PRESENCE D'UN EFFET FABRY-PEROT A COTE DE L'EFFET ELECTRO-OPTIQUE. MALGRE UN BRUIT THERMIQUE ASSEZ ELEVE DU A LA DETECTION DIRECTE, L'UTILISATION DE L'EFFET FABRY-PEROT A L'AIDE D'UN LASER ACCORDABLE PERMET D'OBTENIR UNE SENSIBILITE COMPARABLE A CELLE DE L'ECHANTILLONNAGE, VOIRE AU MOINS DEUX FOIS SUPERIEURE SI UN LASER PLUS PUISSANT EST UTILISE. UN AUTRE AVANTAGE DU A L'EFFET FABRY-PEROT EST QU'IL NOUS OFFRE UN MOYEN SIMPLE DE CALIBRER DES MESURES AFIN DE TENIR COMPTE DE LA NON-UNIFORMITE DE LA FACE METALLISEE DES CIRCUITS INDUSTRIELS. AINSI, DES TENSIONS ABSOLUES PEUVENT ETRE DETERMINEES ET LES MESURES DE PARAMETRES S PAR LE SONDAGE ELECTRO-OPTIQUE SONT POSSIBLES. LE DERNIER CHAPITRE REGROUPE LES RESULTATS EXPERIMENTAUX OBTENUS SUR DIFFERENTS CIRCUITS. L'ACCENT EST PORTE SUR LE POTENTIEL DE LA TECHNIQUE POUR LE TEST DE CIRCUITS INTEGRES INDUSTRIELS, NOTAMMENT LE CALIBRAGE DE MESURES ET LA DETERMINATION DES PARAMETRES S. PARALLELEMENT, NOUS AVONS PU METTRE EN EVIDENCE LA POSSIBILITE D'EFFECTUER DES MESURES ELECTRO-OPTIQUES, EN AMPLITUDE ET EN PHASE, SUR UN ANALYSEUR DE RESEAUX VECTORIEL. LES RESULTATS OBTENUS MONTRENT BIEN LA FIABILITE ET LES BONNES PERFORMANCES DU SYSTEME.

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 NATO Glossary of Terms and Definitions written by North Atlantic Treaty Organization and published by CreateSpace. This book was released on 2013-03-08 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: NATO Glossary of terms and definitions (English and French). Listing terms of military significance and their definitions for use in NATO.

Download or read book NATO Glossary of Abbreviations Used in NATO Documents and Publications written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Oxford Dictionary of English Grammar written by Bas Aarts and published by OUP Oxford. This book was released on 2014-01-16 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Oxford Dictionary of English Grammar is a straightforward and accessible A-Z guide to the diverse and often complex terminology of English grammar. It contains over 1,600 entries with clear and concise definitions, enhanced by numerous example sentences, as well as relevant quotations from the scholarly literature of the field. This second edition is written and edited by Professor Bas Aarts of University College London, writer of the acclaimed Oxford Modern English Grammar. It has been fully revised and updated, with particular attention paid to refreshing the example sentences included within the text. There are over 150 new entries that cover current terminology which has arisen since the publication of the first edition, and there are also new entries on the most important English grammars published since the start of the 20th century. Hundreds of new cross-references enhance the user-friendly nature of the text, and the list of works cited has been thoroughly updated to reflect the current state of the field. A short appendix of web links has been added. All in all, this Dictionary is an invaluable guide to English grammar for all students and teachers of the subject, as well as all those with an informed interest in the English language.

Download or read book Naval Arctic Manual written by and published by . This book was released on 1990 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Penguin Guide to Punctuation written by R L Trask and published by Penguin UK. This book was released on 2019-06-13 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Penguin Guide to Punctuation is indispensable for anyone who needs to get to grips with using punctuation in their written work. Whether you are puzzled by colons and semicolons, unsure of where commas should go or baffled by apostrophes, this jargon-free, succinct guide is for you.

Download or read book A Dictionary of Grammatical Terms in Linguistics written by R.L. Trask and published by Routledge. This book was released on 2013-04-15 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dictionary of grammatical terms covers both current and traditional terminology in syntax and morphology. It includes descriptive terms, the major theoretical concepts of the most influential grammatical frameworks, and the chief terms from mathematical and computational linguistics. It contains over 1500 entries, providing definitions and examples, pronunciations, the earliest sources of terms and suggestions for further reading, and recommendations about competing and conflicting usages. The book focuses on non-theory-boumd descriptive terms, which are likely to remain current for some years. Aimed at students and teachers of linguistics, it allows a reader puzzled by a grammatical term to look it up and locate further reading with ease.

Download or read book Usage and Abusage written by Eric Partridge and published by W. W. Norton & Company. This book was released on 1997 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: A handbook of advice on the proper use of the English language. Includes a section on vogue words that have acquired a power and influence beyond what they originally possessed.

Download or read book The Cassell Guide to Common Errors in English written by Harry Blamires and published by Burns & Oates. This book was released on 1999 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: The English language is a minefield of common errors and disputed points. Dealing with wide-ranging problems of grammar, syntax, punctuation, spelling, usage and style, all articles in this book have examples of incorrect usage, drawn from contemporary sources.

Download or read book Rules for Compositors and Readers at the University Press Oxford written by Oxford University Press and published by . This book was released on 1904 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Doctrine for Amphibious Operations written by United States. Department of the Army and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerospace power in the twenty first century a basic primer written by Clayton K. S. Chun and published by DIANE Publishing. This book was released on 2001 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Chun's Aerospace Power in the Twenty-First Century: A Basic Primer is a great start towards understanding the importance of aerospace power and its ability to conduct modern warfare. Aerospace power is continually changing because of new technology, threats, and air and space theories. However, many basic principles about aerospace power have stood the test of time and warfare. This book provides the reader with many of these time-tested ideas for consideration and reflection. Although Aerospace Power in the Twenty-First Century was written for future officers, individuals desiring a broad overview of aerospace power are invited to read, share, and discuss many of the ideas and thoughts presented here. Officers from other services will find that this introduction to air and space forces will give them a good grasp of aerospace power. More experienced aerospace leaders can use this book to revisit many of the issues that have affected air and space forces in the past and that might affect them in the future. Air Force officers will discover that Aerospace Power in the Twenty-First Century is a very timely and reflective resource for their professional libraries.

Download or read book Water Treatment Handbook written by and published by . This book was released on 2007 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: