Download or read book Automatisation du contr le non destructif par courants de Foucault am lioration du rapport signal sur bruit written by Fatos Qendro and published by . This book was released on 1989 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail présente une contribution à la classification automatique de défauts lors du contrôle par courants de Foucault du fil de cuivre. Après avoir étudié la possibilité d'une telle classification il est déduit que l'amélioration du rapport signal sur bruit est une étape indispensable pour la réussite de cette classification. Plusieurs méthodes de filtrage adaptatif ont été testées et une méthode d'interpolation adaptative a été développée. Cette méthode peut être appliquée avec succès à l'amélioration du rapport signal sur bruit dans le cas des signaux impulsionnels noyés dans un bruit stationnaire à bande étroite, modélisable par un modèle AR d'ordre fini. La méthode d'interpolation est appliquée avec succès aux signaux obtenus en contrôle non destructif par courants de Foucault de tubes de générateur de vapeur

Download or read book Automatisation d un contr le non destructif par courants de Foucault written by Patrice Simard and published by . This book was released on 1984 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book APPLICATION DES COURANTS DE FOUCAULT PULSES AU CONTROLE NON DESTRUCTIF APPROCHES EXPERIMENTALES ET THEORIQUES written by PATRICK.. WEBER and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL DECRIT UN DISPOSITIF DE CONTROLE NON DESTRUCTIF PAR COURANTS DE FOUCAULT PULSES CONCU POUR LA DETECTION DE DEFAUTS DANS LES MATERIAUX METALLIQUES ET PLUS PARTICULIEREMENT DANS L'ACIER AUSTENITIQUE. L'APPROCHE DES PHENOMENES ELECTROMAGNETIQUES MIS EN JEU LORS D'UN CONTROLE EST OBTENUE GRACE A DEUX MODELES SIMPLIFIES. LES CIRCUITS D'EXCITATION ET DE DETECTION AINSI QUE LA CONSTITUTION DES CAPTEURS, OPTIMISES EN CE QUI CONCERNE LEUR LIMITE DE DETECTION EN PROFONDEUR OU LEUR RESOLUTION TRANSVERSALE, SONT EGALEMENT PRESENTES. LES METHODES DE TRAITEMENT ET D'ANALYSE, PROPRES A L'EXCITATION IMPULSIONNELLE, PERMETTENT NON SEULEMENT LA DETECTION D'UN DEFAUT MAIS EGALEMENT SON POSITIONNEMENT PAR RAPPORT A LA SURFACE DE CONTROLE. DES EXEMPLES D'APPLICATION EN MESURE D'EPAISSEUR ET EN DETECTION DE DEFAUTS SONT ABORDES

Download or read book Etude et mod lisation de capteurs destin s au contr le non destructif par courants de Foucault written by Mohamed Bensetti and published by . This book was released on 2004 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAL DE THESE ABORDE DES PROBLEMATIQUES LIEES AU CONTROLE NON DESTRUCTIF (CND) PAR COURANTS DE FOUCAULT, IL EST DECOMPOSE EN TROIS GRANDES PARTIES. LA PREMIERE A ETE CONSACREE A LAMISE EN ŒUVRE DE METHODES D'INVERSION POUR L'ESTIMATION DES PARAMETRES PHYSIQUES ET GEOMETRIQUES DE CIBLES. POUR CE FAIT, NOUS NOUS SOMMES INTERESSES AUX MODELES INVERSES A BASE DE RESEAUX DE NEURONES. DANS CE CONTEXTE DEUX APPLICATIONS ONT ETE ETUDIEES. LES MICRO-BOBINES SONT DEDIEES A PLUSIEURS APPUCATIONS TELLES QUE RADIO FREQUENCE (RF), RESONANCE MAGNETIQUE NUCLEAIRE (RMN), CONTROLE NON DESTRUCTIF (CND). SELON L'APPLICATION, CES MICRO-BOBINES PEUVENT ËTRE UTILISEES EN HAUTE FREQUENCE (HF). EFFECTIVEMENT, LA REPONSE EN HF EST DIFFERENTE DE CELLE EN BF A CAUSE DES EFFETS DE PEAU ET DE PROXIMITE QUI INFLUENT SUR LES PARAMETRES ELECTRIQUES DE LA MICRO-BOBINE. LA RESISTANCE ET L'INDUCTANCE DEPENDENT DE LA FREQUENCE ET LA CAPACITE DE PARASITE NE PEUT ETRE NEGLIGEE. LA SECONDE PARTIE EST CONSACREE A LA MISE EN ŒUVRE D'UNE METHODE ORIGINAL EN COMBINANT ENTRE UNE ANALYSE MAGNETODYNAMIQUE ET UNE ANALYSE ELECTROSTATIQUE POUR LA DETERMINATION DES PARAMETRES ELECTRIQUES DU SCHEMA EQUIVALENT. LE DERNIER ASPECT ABORDE A ETE CONSACRE A L'ELABORATION D'UNE APPROCHE HYBRIDE ASSOSIANT LA METHODE DES ELEMENTS FINIS ET LA METHODE DES INTEGRALES DE FRONTIERES (MIF) POUR CALCULER LA REPONSE DU CAPTEUR EN PRESENCE DE FISSURES. DEUX TYPES DE VALIDATIONS ONT ETE REALISES DANS CE TRAVAIL, UNE COMPARAISON DES RESULTATS OBTENUS PAR LA METHODE DES ELMENTS FINIS AVEC DES RESULTATS FOURNIS PAR LE CEA (LOGICIEL CIVA) ET UNE VALIDATION DE LA METHODE HYBRIDE EN UTILISANT UN DISPOSITIF DE MESURE AU LABORATOIRE.

Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Download or read book Government Reports Annual Index Corporate author written by and published by . This book was released on 1987 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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.

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Download or read book Commercial Nuclear Power written by and published by . This book was released on 1984 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Principles of Radar and Sonar Signal Processing written by Chevalier François Le and published by Artech House. This book was released on 2002 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book I Catherine written by Saint Catherine (of Siena) and published by HarperCollins. This book was released on 1980 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neohellenism written by John Burke and published by . This book was released on 1992 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Nuclear Industry written by U.S. Atomic Energy Commission. Division of Industrial Participation and published by . This book was released on 1974 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Reactor Development written by and published by . This book was released on 1960 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ptolemy s Almagest written by Ptolemy and published by Princeton University Press. This book was released on 1998-11-08 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ptolemy's Almagest is one of the most influential scientific works in history. A masterpiece of technical exposition, it was the basic textbook of astronomy for more than a thousand years, and still is the main source for our knowledge of ancient astronomy. This translation, based on the standard Greek text of Heiberg, makes the work accessible to English readers in an intelligible and reliable form. It contains numerous corrections derived from medieval Arabic translations and extensive footnotes that take account of the great progress in understanding the work made in this century, due to the discovery of Babylonian records and other researches. It is designed to stand by itself as an interpretation of the original, but it will also be useful as an aid to reading the Greek text.