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Author : Fethi Choubani
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (494 download)
Download or read book Etude et conception des oscillateurs : application aux capteurs electromagnetiques written by Fethi Choubani and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fethi Choubani
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (49 download)
Download or read book Étude et conception des oscillateurs written by Fethi Choubani and published by . This book was released on 1993 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE METHODE SYSTEMATIQUE DE CONCEPTION EN FAIBLE SIGNAL D'OSCILLATEURS LIBRES OU ACCORDABLES EST PRESENTEE DANS CE MEMOIRE. UNE ANALYSE DES PRINCIPALES PROPRIETES DE CES CIRCUITS COMBINEE AVEC DES RESULTATS EMPIRIQUES TROUVES A L'AIDE DE METHODES FORTS SIGNAUX, A PERMIS DE CONCEVOIR ET DE REALISER PLUSIEURS TYPES D'OSCILLATEURS (DRO, VCO, ...) A L'AIDE DE LOGICIELS DE CAO OU D'OUTILS DE CALCUL MATHEMATIQUE. PLUSIEURS SOLUTIONS SONT PROPOSEES POUR AMELIORER LES PERFORMANCES EN STABILITE, PULLING ET BRUIT. UNE DEUXIEME PARTIE DE CETTE ETUDE EST CONSACREE A L'APPLICATION DES OSCILLATEURS AUX CAPTEURS ELECTROMAGNETIQUES. DES DISPOSITIFS POUR LA CARACTERISATION DES MATERIAUX DIELECTRIQUES SONT ELABORES. ENFIN, LA CONCEPTION DES ANTENNES MICROBANDES AINSI QUE L'ETUDE DE L'EFFET DOPPLER ET LA RETRODIFFUSION DU SOL ONT DEBOUCHE SUR LA REALISATION DES CAPTEURS ALTIMETRIQUES
Author : Minh-Quang Lê
Publisher :
ISBN 13 :
Total Pages : 191 pages
Book Rating : 4.:/5 (49 download)
Download or read book Conception et modélisation de capteurs électromagnetiques written by Minh-Quang Lê and published by . This book was released on 1995 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée a l'étude et a la réalisation d'un système de contrôle non destructif par capteurs electromagnetiques. Les capteurs étudies appartiennent a la famille des capteurs magnétiques ou a courants de foucault. Ce mémoire comprend trois étapes principales: la conception des capteurs, leur modélisation et la résolution du problème inverse pour l'estimation des paramètres recherches. Le principe de fonctionnement de ces capteurs, ainsi que quelques generalites sur cette technique de contrôle non destructif sont présentes au chapitre 1. Ensuite, le chapitre 2 aborde le problème de l'optimisation de la géométrie du capteur afin d'augmenter son efficacité de détection. Deux structures différentes y sont proposées. Les simulations par éléments finis et les essais expérimentaux ont montre que ces structures sont intéressantes par rapport a certaines structures existantes. Afin d'approfondir l'étude des structures proposées et l'exploitation des données, la modélisation des capteurs est indispensable et elle constitue l'objectif du troisième chapitre. La première partie de ce chapitre traite la modélisation analytique, laquelle est fondée entièrement sur la théorie de l'electromagnetisme. L'approche comportementale de la modélisation est traitée au cours de la deuxième partie. Ce type de modélisation est utilisée quand on veut obtenir rapidement un modèle pour une configuration donnée. Pour ce faire, nous avons utilise des modèles polynomiaux ou des réseaux de neurones. La bonne adéquation avec les données expérimentales a valide les modèles obtenus. Le quatrième chapitre aborde l'exploitation des signaux capteur permettant de retrouver les paramètres influents. Nous avons illustre ce problème par deux exemples de contrôles industriels. Le premier exemple est la mesure simultanée de la conductivité électrique et de la perméabilité magnétique d'une cible métallique plane ainsi que de la distance capteur cible. Le deuxième exemple concerne la mesure avec grande précision du diamètre des cylindres d'acier dont les propriétés physiques sont incontrôlables. Pour le premier exemple, nous avons résolu le problème par inversion du modèle de l'interaction capteur cible a l'aide des algorithmes itératifs, tandis que pour le deuxième, un modèle inverse permettant de retrouver directement le paramètre recherche a été utilise
Author : SANTOSO.
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (49 download)
Download or read book PARAMETRES DE REGLAGE DE LA FREQUENCE D'UN OSCILLATEUR-CAPTEUR. ETUDE DE DISPOSITIFS LC written by SANTOSO. and published by . This book was released on 1995 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE TRAVAIL PRESENTE DANS CE MEMOIRE TRAITE DE L'APPLICATION DES OSCILLATEURS SINUSOIDAUX A LA MESURE DE GRANDEURS PHYSIQUES VIA LES VARIATIONS DE LA FREQUENCE D'OSCILLATION. MALGRE LES NOMBREUX AVANTAGES QUE PRESENTE LA MESURE DE LA FREQUENCE, LES PERFORMANCES DES OSCILLATEURS-CAPTEURS SONT SOUVENT LIMITEES PAR DES DIFFICULTES A CONTROLER LA LOI FREQUENTIELLE ET LA REPRODUCTIBILITE. CES DEFAUTS SONT EVIDEMMENT AMPLIFIES, SURTOUT A FREQUENCE ELEVEE, PAR LES CONDITIONS D'ENVIRONNEMENT TRES PERTURBEES QUI SONT SOUVENT LE LOT DES CAPTEURS. LES PERTES NOTAMMENT JOUENT UN ROLE PRIMORDIAL. LEUR EFFET, RESULTAT DE PHENOMENES COMBINES DE NATURE LINEAIRE ET NON LINEAIRE, EST MIS EN EVIDENCE DANS UNE PRESENTATION S'APPUYANT SUR LES OSCILLATEURS LC. DANS CE CONTEXTE, LE CIRCUIT ELECTRONIQUE D'ENTRETIEN A UNE GRANDE INFLUENCE. C'EST POURQUOI UNE REVUE DES PRINCIPALES STRUCTURES EST EFFECTUEE A PARTIR DE LA NOTION DE SOURCE COMMANDEE, QUI EST L'UNE DES BASES FONCTIONNELLES DE L'ELECTRONIQUE. LES PROBLEMES LIES A L'ENVIRONNEMENT SONT ILLUSTRES ET IL EST MONTRE QUE LA RECHERCHE, A PRIORI SEDUISANTE, D'UNE SOURCE COMMANDEE IDEALEMENT INDEPENDANTE DE LA FREQUENCE EST FORMELLEMENT CONTRE-INDIQUEE. DEVELOPPEE A PARTIR DE CETTE REMARQUE, LA SUITE DU TRAVAIL TRAITE L'ASPECT THEORIQUE DU DEMARRAGE D'UN OSCILLATEUR DANS LE BUT DE RECHERCHER DES STRUCTURES MATHEMATIQUES ADAPTEES A L'ENTRETIEN DES DIVERSES CONFIGURATIONS D'OSCILLATEURS-CAPTEURS. PLUSIEURS TYPES D'EQUATIONS SONT AINSI BATIS, SUR LESQUELS LE REALISATEUR PEUT PRENDRE APPUI POUR LA CONCEPTION D'UN APPAREILLAGE. L'OUTIL DE SIMULATION ELECTRONIQUE, TRES LARGEMENT UTILISE, EST PRESENTE POUR SES APPORTS SPECIFIQUES ET POUR SA CAPACITE A TRAITER LES ASPECTS LINEAIRES ET NON LINEAIRES DES SYSTEMES ETUDIES, DU PRINCIPE LE PLUS ELEMENTAIRE A LA REPRESENTATION LA PLUS FOUILLEE. UNE APPLICATION SOULIGNE A TOUS LES STADES DE SA REALISATION LES POINTS LES PLUS IMPORTANTS DE L'ETUDE ET DONNE DES RESULTATS, EN BON ACCORD AVEC LES PREVISIONS, QUI CONFORTENT LA DEMARCHE ENTREPRISE
Author : George Green
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.A/5 ( download)
Download or read book An Essay on the Application of Mathematical Analysis to the Theories of Electricity and Magnetism written by George Green and published by . This book was released on 1828 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bertrand Lavédrine
Publisher : Getty Publications
ISBN 13 : 9780892367016
Total Pages : 304 pages
Book Rating : 4.3/5 (67 download)
Download or read book A Guide to the Preventive Conservation of Photograph Collections written by Bertrand Lavédrine and published by Getty Publications. This book was released on 2003 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A resource for the photographic conservator, conservation scientist, curator, as well as professional collector, this volume synthesizes both the masses of research that has been completed to date and the international standards that have been established on the subject.
Author : Wade H. Shafer
Publisher : Springer Science & Business Media
ISBN 13 : 1461534747
Total Pages : 421 pages
Book Rating : 4.4/5 (615 download)
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 34 (thesis year 1989) a total of 13,377 theses titles from 26 Canadian and 184 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 34 reports theses submitted in 1989, on occasion, certain univer sities do report theses submitted in previous years but not reported at the time.
Author : Laurent-Patrick Levy
Publisher : Springer Science & Business Media
ISBN 13 : 3662042711
Total Pages : 470 pages
Book Rating : 4.6/5 (62 download)
Download or read book Magnetism and Superconductivity written by Laurent-Patrick Levy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date work presents a modern vision of magnetism and superconductivity covering both microscopic and phenomenological aspects. The basic information is illustrated with the help of current research topics such as the quantum Hall effect or mesoscopic aspects of superconductivity.
Author : Robert Perret
Publisher : John Wiley & Sons
ISBN 13 : 1118623207
Total Pages : 381 pages
Book Rating : 4.1/5 (186 download)
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.
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 : Igor V. Komarov
Publisher : Artech House
ISBN 13 : 1580531105
Total Pages : 308 pages
Book Rating : 4.5/5 (85 download)
Download or read book Fundamentals of Short-range FM Radar written by Igor V. Komarov and published by Artech House. This book was released on 2003 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's a unique new resource that offers you a solid understanding of the fundamental theory, operation principles and applications of short-range frequency modulated continuous wave (FM CW) radar. You learn how to choose the structural scheme of short-range FM radar, and determine the optimal algorithm of useful signal processing necessary for ensuring the technical characteristic of radar. Moreover, this practical reference shows you how to ensure the minimum level of radar signal parasitic amplitude, calculate modulation signal distortion, and compensate for nonlinear distortion.
Author : Gustav Gautschi
Publisher : Springer Science & Business Media
ISBN 13 : 3662047322
Total Pages : 271 pages
Book Rating : 4.6/5 (62 download)
Download or read book Piezoelectric Sensorics written by Gustav Gautschi and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the first time, this book covers the entire field of piezoelectric sensors for mechanical measurands. It gives extensive practical advice along with an overview of the most important piezoelectric materials and their properties, plus consistent terminology for describing sensors.
Author : Jan Ehrenwerth, MD
Publisher : Elsevier Health Sciences
ISBN 13 : 0323112374
Total Pages : 770 pages
Book Rating : 4.3/5 (231 download)
Download or read book Anesthesia Equipment written by Jan Ehrenwerth, MD and published by Elsevier Health Sciences. This book was released on 2013-04-01 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anesthesia Equipment: Principles and Applications, 2nd Edition, by Dr. Jan Ehrenwerth and Dr. James B. Eisenkraft, offers expert, highly visual, practical guidance on the full range of delivery systems and technology used in practice today. It equips you with the objective, informed answers you need to ensure optimal patient safety. "This is a comprehensive, up-to-date reference textbook covering all aspects of physics and equipment for the modern American anaesthetist. It may be helpful to those studying for American fellowship examinations but is not suited to preparation for the UK FRCA examinations." Reviewed by: I.Wrench on behalf of the British Journal of Anaesthesia, Feb 2014 Make informed decisions by expanding your understanding of the physical principles of equipment, the rationale for its use, delivery systems for inhalational anesthesia, systems monitoring, hazards and safety features, maintenance and quality assurance, special situations/equipment for non-routine adult anesthesia, and future directions for the field. Ensure patient safety with detailed advice on risk management and medicolegal implications of equipment use. Apply the most complete and up-to-date information available on machines, vaporizers, ventilators, breathing systems, vigilance, ergonomics, and simulation. Visualize the safe and effective use of equipment thanks to hundreds of full-color line drawings and photographs. Access the complete text and images online, fully searchable, at www.expertconsult.com.
Author : David M. Pozar
Publisher : John Wiley & Sons
ISBN 13 : 0471322822
Total Pages : 380 pages
Book Rating : 4.4/5 (713 download)
Download or read book Microwave and RF Design of Wireless Systems written by David M. Pozar and published by John Wiley & Sons. This book was released on 2000-11-29 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: David Pozar, author of Microwave Engineering, Second Edition, has written a new text that introduces students to the field of wireless communications. This text offers a quantitative and, design-oriented presentation of the analog RF aspects of modern wireless telecommunications and data transmission systems from the antenna to the baseband level. Other topics include noise, intermodulation, dynamic range, system aspects of antennas and filter design. This unique text takes an integrated approach to topics usually offered in a variety of separate courses on topics such as antennas and proagation, microwave systems and circuits, and communication systems. This approach allows for a complete presentation of wireless telecommunications systems designs. The author's goal with this text is for the student to be able to analyze a complete radio system from the transmitter through the receiver front-end, and quantitatively evaluate factors. Suitable for a one-semester course, at the senior or first year graduate level. Note certain sections have been denoted as advanced topics, suitable for graduate level courses.
Author : Edward A. Metzbower
Publisher : ASM International(OH)
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.:/5 (89 download)
Download or read book Lasers in Materials Processing written by Edward A. Metzbower and published by ASM International(OH). This book was released on 1983 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dieter Wagner
Publisher : Springer Science & Business Media
ISBN 13 : 940115080X
Total Pages : 455 pages
Book Rating : 4.4/5 (11 download)
Download or read book Itinerant Electron Magnetism: Fluctuation Effects written by Dieter Wagner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of recent developments in theoretical and experimental studies of fluctuation effects in itinerant electron magnets, focusing on novel physical phenomena: soft-mode spin fluctuations and zero-point effects, strong spin anharmonicity, magnetic frustrations in metals, fluctuation effects in Invar alloys and low-dimensional systems. All of these may be important for novel high-technology applications.
Author : John Henry Poynting
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (42 download)
Download or read book The Pressure of Light written by John Henry Poynting and published by . This book was released on 1907 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
