Download or read book Controle non destructif par analyse supervisee d images 3D ultrasonores written by Etienne Goubet and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contr le non destructif par analyse supervis e d images 3D ultrasonores written by Étienne Goubet and published by . This book was released on 1999 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objet de cette thèse consiste en l'élaboration d'une chaine de traitements permettant d'extraire l'information utile de données 3d ultrasonores et de caractériser les défauts éventuellement présents dans la pièce inspectée. Cette caractérisation a été abordée pour des fissures contrôlées par un même émetteur/récepteur. Dans une première partie nous rappelons les principes du contrôle non destructif par ultrasons ainsi que les représentations classiques des données ultrasonores. La deuxième partie est consacrée à l'étude d'un modèle d'extraction de l'information d'échos présents sur les données au moyen d'une base d'ondelettes adaptée. L'utilisation d'une ondelette unique translatée dans le temps est rendue possible par un travail sur une représentation complexe des données réelles originales. Une première étape permet de détecter et de positionner les échos d'amplitude significative. Dans un deuxième temps, on effectue une régularisation spatialement cohérente des instants de détection à l'aide d'un modèle markovien. On élimine ainsi les échos dont les instants de détection ne font pas partie de surfaces d'instants régulières. Les parties suivantes traitent de la localisation et du dimensionnement des fissures. On utilise des caractéristiques extraites du faisceau ultrasonore afin de déterminer le trajet de l'onde ultrasonore du capteur à l'objet diffractant lorsque la réponse de l'écho est maximale. On met en correspondance l'instant de détection obtenu pour cet écho et le temps de parcours selon le trajet défini afin de positionner un point d'arête dans la pièce. On obtient ainsi un ensemble de points de discrétisation pour chaque arête. Dans le cadre de données 3d obtenues sur un matériau isotrope, on élimine les points d'arête extrêmes en utilisant un critère de comparaison sur les courbes échodynamiques associées aux points de détection sur les données réelles et sur des données simulées équivalentes. La localisation est abordée pour des fissures situées dans un matériau isotrope ou acier revêtu d'anisotrope.
Download or read book NDT Data Fusion written by Xavier Gros and published by Elsevier. This book was released on 1996-11-01 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data fusion is a rapidly developing technology which involves the combination of information supplied by several NDT (Non-Destructive Testing) sensors to provide a more complete and understandable picture of structural integrity. This text is the first to be devoted exclusively to the concept of multisensor integration and data fusion applied to NDT. The advantages of this methodology are widely acknowledged and the author presents an excellent introduction to data fusion processes. Problems are approached progressively through detailed case studies, offering practical guidance for those wishing to develop and explore NDT data fusion further. This book will prove invaluable to inspectors, students and researchers concerned with NDT signal processing measurements and testing. It shows the great value and major benefits which can be achieved by implementing multisensor data fusion, not only in NDT but also in any discipline where measurements and testing are key activities.
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 Proceedings of the 13th World Conference on Titanium written by Vasisht Venkatesh and published by John Wiley & Sons. This book was released on 2016-04-26 with total page 4024 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the Proceedings of the 13th World Conference on Titanium.
Download or read book Electric Machines and Drives written by Miroslav Chomat and published by BoD – Books on Demand. This book was released on 2011-02-28 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subject of this book is an important and diverse field of electric machines and drives. The twelve chapters of the book written by renowned authors, both academics and practitioners, cover a large part of the field of electric machines and drives. Various types of electric machines, including three-phase and single-phase induction machines or doubly fed machines, are addressed. Most of the chapters focus on modern control methods of induction-machine drives, such as vector and direct torque control. Among others, the book addresses sensorless control techniques, modulation strategies, parameter identification, artificial intelligence, operation under harsh or failure conditions, and modelling of electric or magnetic quantities in electric machines. Several chapters give an insight into the problem of minimizing losses in electric machines and increasing the overall energy efficiency of electric drives.
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 Restoration of Architectural Heritage written by Stanislav Kolisnychenko and published by Trans Tech Publications Ltd. This book was released on 2017-05-08 with total page 1630 pages. Available in PDF, EPUB and Kindle. Book excerpt: The conventional and unconventional materials, modern engineering methods and technologies employed in the restoration and reconstruction of architectural heritage are the topics of the aggregated edition Restoration of Architectural Heritage". The book contains the scientific articles selected from the materials published by Trans Tech Publications Inc. from 2010 to 2016 inclusive. We hope this collection will be useful for many readers whose activity refers to the architectural heritage preservation sphere.
Download or read book The Physics of Welding written by J. F. Lancaster and published by Elsevier. This book was released on 2013-10-22 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Physics of Welding, Second Edition covers advances in welding physics. The book describes symbols, units and dimensions; the physical properties of fluids at elevated temperatures; and electricity and magnetism. The text also discusses fluid and magneto fluid dynamics; the electric arc; and the electric arc in welding. Metal transfer and mass flow in the weld pool, as well as high power density welding are also tackled. Students interested in welding physics will find the book useful.
Download or read book Modern Radar Detection Theory written by Antonio De Maio and published by IET. This book was released on 2015-11-25 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern radar detection is the new frontier for advanced radar systems capable of operating in challenging scenarios with a plurality of interference sources, both manmade and natural. Written by top researchers and recognized leaders in the field, this is the first book to provide a comprehensive understanding of the current research trends in modern radar detection. It updates readers with the latest radar signal processing algorithms now capable with high-speed computer chips and sophisticated programs. It also includes examples and applications from real systems. This is essential reading for radar systems design engineers within aerospace companies, military radar engineers, and aerospace contractors/consultants.
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Topological Data Analysis for Scientific Visualization written by Julien Tierny and published by Springer. This book was released on 2018-01-16 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining theoretical and practical aspects of topology, this book provides a comprehensive and self-contained introduction to topological methods for the analysis and visualization of scientific data. Theoretical concepts are presented in a painstaking but intuitive manner, with numerous high-quality color illustrations. Key algorithms for the computation and simplification of topological data representations are described in detail, and their application is carefully demonstrated in a chapter dedicated to concrete use cases. With its fine balance between theory and practice, "Topological Data Analysis for Scientific Visualization" constitutes an appealing introduction to the increasingly important topic of topological data analysis for lecturers, students and researchers.
Download or read book Annual Report 1985 written by United States. Presidential Advisory Committee on Small and Minority Business Ownership and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Construction Manual for Robots Ethical Systems written by Robert Trappl and published by Springer. This book was released on 2015-11-26 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will help researchers and engineers in the design of ethical systems for robots, addressing the philosophical questions that arise and exploring modern applications such as assistive robots and self-driving cars. The contributing authors are among the leading academic and industrial researchers on this topic and the book will be of value to researchers, graduate students and practitioners engaged with robot design, artificial intelligence and ethics.
Download or read book Guide to the Welding and Weldability of Cryogenic Steels written by International Institute of Welding and published by Woodhead Publishing. This book was released on 1987-01-01 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Modeling for Virtual Manufacturing Systems and Processes written by Jan C. Aurich and published by Trans Tech Publications Ltd. This book was released on 2017-08-30 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1st Conference on Physical Modeling for Virtual Manufacturing Systems and Processes is the result of the International Research Training Group (IRTG) 2057 "Physical Modeling for Virtual Manufacturing Systems and Processes", funded by the German Research Foundation (DFG). The IRTG began on 01 July 2014. Partner University of the University of Kaiserslautern, is the University of California, with its locations in Berkeley and Davis. At the conference the progress and the results of the first cohort of PhD students was presented. The conference was complemented by talks of international guest speakers from computer science and manufacturing engineering. The proceedings contain 22 peer-reviewed papers on Physical Modeling for Virtual Manufacturing Systems and Processes.
Download or read book AWS A5 5 A5 5M 2006 Specification for Low Alloy Steel Electrodes for Shielded Metal Arc Welding written by American Welding Society and published by . This book was released on 2006-01-01 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
