Download or read book DETERMINATION DU COUPLAGE D UNE ONDE ELECTROMAGNETIQUE AVEC UN CABLE SITUE DANS UNE CAVITE METALLIQUE written by Dominique Lecointe and published by . This book was released on 1995 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE PRESENTE L'ANALYSE DU COUPLAGE D'UNE ONDE ELECTROMAGNETIQUE AVEC UNE CAVITE PARALLELEPIPEDIQUE PARFAITEMENT CONDUCTRICE POSSEDANT UNE OU PLUSIEURS OUVERTURES DANS SA PAROI. PLUS PARTICULIEREMENT, LE COURANT INDUIT SUR UN CABLE PLACE A L'INTERIEUR DE LA CAVITE, AINSI QUE LA TENSION AUX BORNES D'UNE IMPEDANCE CHARGEANT LE CABLE SONT DETERMINES. LA MODELISATION EST BASEE SUR UNE REPRESENTATION INTEGRALE DES CHAMPS UTILISANT LES FONCTIONS DE GREEN DYADIQUES DE LA CAVITE SANS OUVERTURE. CETTE APPROCHE PERMET DE NE CONSIDERER COMME INCONNU QUE LE COURANT INDUIT SUR LE CABLE, LIMITANT AINSI LE VOLUME DES CALCULS A EFFECTUER. UN AUTRE POINT CLE DE CETTE MODELISATION EST LA DESCRIPTION DE L'OUVERTURE PAR DEUX DIPOLES, L'UN ELECTRIQUE, L'AUTRE MAGNETIQUE. CETTE APPROXIMATION N'EST EN PRINCIPE VALABLE QUE POUR DES OUVERTURES DE DIMENSIONS PETITES DEVANT LA LONGUEUR D'ONDE. LE MODELE DEVELOPPE A PERMIS D'ENTREPRENDRE UNE ANALYSE PARAMETRIQUE DE LA TENSION RECUEILLIE AUX BORNES D'UNE IMPEDANCE CHARGEANT LE CABLE. LES RESULTATS OBTENUS ONT ETE VALIDES EXPERIMENTALEMENT AU CENTRE D'ETUDES DE GRAMAT. L'INFLUENCE DE PLUSIEURS PARAMETRES A ETE MISE EN EVIDENCE: LES DIMENSIONS DE LA CAVITE, LA POSITION ET LA LONGUEUR DU CABLE, LA GEOMETRIE DE L'OUVERTURE. PLUSIEURS FREQUENCES DE RESONANCE ONT ETE IDENTIFIEES ET PEUVENT ETRE PREDETERMINEES. L'ANALYSE ET LA COMPREHENSION PHYSIQUE DU PHENOMENE DE REACTION DU FIL ET DES PAROIS SUR L'OUVERTURE A PERMIS DE DETERMINER LA NECESSITE DE PRENDRE EN COMPTE CETTE REACTION OU LA POSSIBILITE DE LA NEGLIGER SELON LA BANDE DE FREQUENCE D'ETUDE POUR UNE STRUCTURE DONNEE

Download or read book International Conference on Antennas and Propagation written by and published by . This book was released on 1993 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book APPORT DES STATISTIQUES AUX ETUDES DES PHENOMENES DE COUPLAGE EN COMPATIBILITE ELECTROMAGNETIQUE written by JEAN.. LEFEBVRE and published by . This book was released on 1997 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA MULTIPLICATION DES DISPOSITIFS ELECTRONIQUES RAYONNANTS FAIT DE LA COMPATIBILITE ELECTROMAGNETIQUE (CEM) UNE PREOCCUPATION MAJEURE DE L'INGENIEUR DES LA PHASE DE CONCEPTION D'UN PRODUIT. LE GRAND NOMBRE DE FACTEURS DE CONCEPTION ET LA COMPLEXITE DES INTERACTIONS ELECTROMAGNETIQUES RENDENT LE COUT D'UNE ETUDE PARAMETRIQUE PROHIBITIF, MALGRE LES PROGRES DE L'INFORMATIQUE ET DES METHODES NUMERIQUES. L'OBJET DE CE TRAVAIL EST DE MONTRER COMMENT LES METHODES STATISTIQUES VIENNENT UTILEMENT COMPLETER LES CODES DE CALCUL DE L'ELECTROMAGNETISME. LES METHODES PROPOSEES SONT, ASSOCIEES AVEC LA PLANIFICATION D'EXPERIENCES, LE KRIGEAGE ET LA REGRESSION. UN ACCENT PARTICULIER EST MIS SUR LE KRIGEAGE, DONT IL S'AGIT DE LA PREMIERE APPLICATION EN CEM. APPLIQUEES A L'ETUDE DU COUPLAGE D'UNE ONDE ELECTROMAGNETIQUE A UN CABLE PLACE DANS UNE CAVITE METALLIQUE, AINSI QU'A L'ETUDE DU COEFFICIENT DE REFLEXION D'UN RESEAU DE FIBRES, CES METHODES ONT PERMIS DE DISTINGUER DES COMPORTEMENTS NON TRIVIAUX DES PHENOMENES OBSERVES, A PARTIR DE SEULEMENT QUELQUES SIMULATIONS. LES RESULTATS OBTENUS SONT PROMETTEURS ET PERMETTENT D'ENVISAGER DES APPLICATIONS PLUS REALISTES.

Download or read book Tenth International Conference on Antennas and Propagation written by and published by . This book was released on 1997 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ETUDE DU COUPLAGE D UNE ONDE ELECTROMAGNETIQUE AVEC DES CABLES SOUTERRAINS ANTENNES ET CABLES written by Sami Dawood and published by . This book was released on 1987 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE LA REPONSE D'UN CABLE ENTERRE INFINI A UNE IMPULSION ELECTROMAGNETIQUE. DETERMINATION DE LA REPARTITION DU COURANT INDUIT PAR UNE METHODE MODALE. ETUDE DU CAS DES CABLES DE LONGUEUR FINIE PAR LA THEORIE DES LIGNES. ETUDE DES IMPULSIONS EXPONENTIELLE ET EN ECHELON

Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.

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.

Download or read book Adhesion Between Polymers and Concrete Adh sion Entre Polym res Et B ton written by H. R. Sasse and published by Springer. This book was released on 1986 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.

Download or read book The Theory of Ionization of Gases by Collision written by Sir John Townsend and published by . This book was released on 1910 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.

Download or read book Aeronomy written by P. M. Banks and published by Elsevier. This book was released on 2013-09-24 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.

Download or read book In Vessel Melt Retention and Ex Vessel Corium Cooling IAEA Tecdoc No 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.

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 Color Television Receivers written by and published by . This book was released on 1978 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report to the President on investigation no. 332-95 under section 332 of the Tariff Act of 1930, as amended.

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contrast Enhanced MRI of the Breast written by Sylvia Heywang-Köbrunner and published by Springer. This book was released on 2011-10-08 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first edition of Contrast-Enhanced MRI of the Breast was published in 1990, further progress has been made in the field and interest in magnetic resonance imaging (MRI) as an additional tool in the diagnosis of breast disease has increased. However, further questions have arisen concerning the best choice of technique, the most appropriate way to interpret MR images, and the role which MRI might play in the work-up of breast disease. In this edition we give an overview of the latest technical possibilities and present knowledge, which today is based on a much greater range of experience gained by various excellent research groups. It is our aim to help the interested reader in choosing an appropriate technique and in finding those applications which promise the greatest benefit for the patient. The particular advantages and limitations of MRI have been pointed out and the currently known capabilities and still existing limitations of other imaging modalities, including transcutaneous biopsy, discussed. Finally, a chapter concerning the use of MRI in the diagnosis of implant failure, a new situation, has been added. Acknowledgements. Since the first edition was published, much further work and research has been necessary. This would not have been possible without the continuous support of many colleagues, coworkers, and advisors.