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Detection Et Localisation De Defauts Par Analyse En Composantes Principales
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Book Synopsis Détection et localisation de défauts par analyse en composantes principales by : Mohamed-Faouzi Harkat
Download or read book Détection et localisation de défauts par analyse en composantes principales written by Mohamed-Faouzi Harkat and published by . This book was released on 2003 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les travaux présentés dans ce mémoire sont axés sur la détection et la localisation de défauts en utilisant l'analyse en composantes principales (ACP). Dans le premier chapitre les principes fondamentaux de l'analyse en composantes principales linéaire sont présentés. L'ACP est utilisée pour la modélisation des processus en fonctionnement normal. Dans le deuxième chapitre le problème de détection et localisation de défauts par ACP linéaire est abordé. A partir de l'analyse des indices de détection classiques, un nouvel indice de détection de défaut basé sur les dernières composantes principales a été développé. Pour la localisation de défauts, les méthodes classiques, utilisant par exemple le principe de reconstruction ou encore le calcul des contributions à l'indice de détection, ont été adaptées à l'indice de détection proposé. Le troisième chapitre est consacré à l'ACP non-linéaire (ACPNL). Une extension de l'ACP pour des systèmes non-linéaires, combinant l'algorithme des courbes principales et les réseaux RBF, est proposée. Pour la détermination du nombre de composantes à retenir dans le modèle ACPNL, une extension du critère basé sur la variance de l'erreur de reconstruction a été proposée. Une application réalisée dans le cadre d'une collaboration avec le réseau de surveillance de la qualité de l'air en Lorraine AIRLOR fait l'objet du quatrième chapitre. Cette application concerne, la détection et la localisation de défauts de capteurs de ce réseau en utilisant la procédure de détection et de localisation développée dans le cas linéaire.
Book Synopsis Diagnostic de systèmes non linéaires par analyse en composantes principales à noyau by : Kwami Dodzivi Anani
Download or read book Diagnostic de systèmes non linéaires par analyse en composantes principales à noyau written by Kwami Dodzivi Anani and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette thèse, le diagnostic d'un système non linéaire a été réalisé par une analyse de données. Initialement conçue pour analyser les données liées par des relations linéaires, l'Analyse en Composantes Principales (ACP) est couplée aux méthodes à noyau pour détecter, localiser et estimer l'amplitude des défauts sur des systèmes non linéaires. L'ACP à noyau consiste à projeter les données par l'intermédiaire d'une application non linéaire dans un espace de dimension élevée dénommé espace des caractéristiques où l'ACP linéaire est appliquée. Ayant fait la projection à l'aide de noyaux, la détection peut facilement être réalisée dans l'espace des caractéristiques. Cependant, l'estimation de l'amplitude du défaut nécessite la résolution d'un problème d'optimisation non linéaire. Une étude de contributions permet de localiser et d'estimer ces amplitudes. La variable ayant la plus grande contribution est susceptible d'être affectée par un défaut. Dans notre travail, nous avons proposé de nouvelles méthodes pour les phases de localisation et d'estimation des défauts pour lesquelles les travaux existants ont des limites. La nouvelle méthode proposée est basée sur les contributions sous contraintes permettant d'obtenir une reconstruction parcimonieuse des variables. L'efficacité des méthodes proposées est montrée sur un réacteur à agitation continue (CSTR).
Book Synopsis Diagnostic de processus continus by : Abdessamad Kobi
Download or read book Diagnostic de processus continus written by Abdessamad Kobi and published by . This book was released on 1994 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES TRAVAUX PRESENTES DANS CE MEMOIRE SE SITUENT DANS LE CADRE DU DIAGNOSTIC DE PROCESSUS CONTINUS. ILS SONT AXES SUR LA DETECTION DE DEFAUTS DE CAPTEURS ET DE MODIFICATIONS DE PROCESSUS INDUSTRIELS. NOUS NOUS SOMMES PLUS PARTICULIEREMENT INTERESSES AUX DEFAUTS DE TYPES VALEURS ABERRANTES. DANS LE PREMIER CHAPITRE, NOUS AVONS APPLIQUE L'ANALYSE EN COMPOSANTES PRINCIPALES SUR UN TABLEAU DE VALEURS. AINSI, NOUS AVONS MIS EN PLACE UNE STRATEGIE BASEE SUR L'ANALYSE DES NUAGES DES OBSERVATIONS ET SUR LA CONTRIBUTION DE CES OBSERVATIONS A LA CONSTRUCTION DES AXES FACTORIELS POUR LA DETECTION DES VALEURS ABERRANTES. DANS LE DEUXIEME CHAPITRE, NOUS AVONS PRESENTE UNE SYNTHESE DES DIFFERENTS DIAGNOSTICS DANS UNE REGRESSION LINEAIRE. UNE ETUDE COMPARATIVE A ETE REALISEE ET UNE APPLICATION A ETE EFFECTUEE SUR DES DONNEES REELLES DU PROCESSUS PILOTE REALISE AU LABORATOIRE. POUR LE TROISIEME CHAPITRE DE CE MEMOIRE, NOUS AVONS APPLIQUE DES TESTS STATISTIQUES POUR VERIFIER L'APPARTENANCE DE TOUTES LES MESURES DELIVREES PAR LE CAPTEUR A LA LOI DE DISTRIBUTION CONNUE OU DETERMINEE A L'AVANCE. CETTE APPLICATION A ETE EFFECTUEE D'UNE PART SUR DES DONNEES DU PROCESSUS PILOTE ET D'AUTRE PART SUR DES DONNEES SIMULEES. LORSQUE LE SIGNAL DELIVRE PAR LE CAPTEUR EST MODELISE PAR UN PROCESSUS AUTOREGRESSIF, LA PROCEDURE QUE NOUS AVONS MISE EN UVRE, DANS LE QUATRIEME CHAPITRE, PERMET D'ESTIMER LES PARAMETRES DU MODELE, EN UTILISANT LA TECHNIQUE DES MOINDRES CARRES, DE DETECTER ET DE LOCALISER LE DEFAUT, D'IDENTIFIER SA NATURE ET ENFIN DE CORRIGER LES MESURES. NOUS AVONS ETENDU CETTE APPROCHE A DES PROCESSUS AUTO REGRESSIFS VECTORIELS. ENFIN, DANS LE CINQUIEME CHAPITRE, NOUS AVONS DEVELOPPE UNE TECHNIQUE ORIGINALE, BASEE SUR LE CALCUL DE L'AMPLITUDE DE DEFAUT NORMALISE PAR SON ECART-TYPE, POUR DETECTER LES DEFAUTS CAPTEURS SUR LES ENTREES ET LES SORTIES DU SYSTEME.
Download or read book Neural Networks written by Gérard Dreyfus and published by Springer Science & Business Media. This book was released on 2005-11-25 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural networks represent a powerful data processing technique that has reached maturity and broad application. When clearly understood and appropriately used, they are a mandatory component in the toolbox of any engineer who wants make the best use of the available data, in order to build models, make predictions, mine data, recognize shapes or signals, etc. Ranging from theoretical foundations to real-life applications, this book is intended to provide engineers and researchers with clear methodologies for taking advantage of neural networks in industrial, financial or banking applications, many instances of which are presented in the book. For the benefit of readers wishing to gain deeper knowledge of the topics, the book features appendices that provide theoretical details for greater insight, and algorithmic details for efficient programming and implementation. The chapters have been written by experts and edited to present a coherent and comprehensive, yet not redundant, practically oriented introduction.
Book Synopsis Data-Driven and Model-Based Methods for Fault Detection and Diagnosis by : Majdi Mansouri
Download or read book Data-Driven and Model-Based Methods for Fault Detection and Diagnosis written by Majdi Mansouri and published by Elsevier. This book was released on 2020-02-05 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data-Driven and Model-Based Methods for Fault Detection and Diagnosis covers techniques that improve the quality of fault detection and enhance monitoring through chemical and environmental processes. The book provides both the theoretical framework and technical solutions. It starts with a review of relevant literature, proceeds with a detailed description of developed methodologies, and then discusses the results of developed methodologies, and ends with major conclusions reached from the analysis of simulation and experimental studies. The book is an indispensable resource for researchers in academia and industry and practitioners working in chemical and environmental engineering to do their work safely. Outlines latent variable based hypothesis testing fault detection techniques to enhance monitoring processes represented by linear or nonlinear input-space models (such as PCA) or input-output models (such as PLS) Explains multiscale latent variable based hypothesis testing fault detection techniques using multiscale representation to help deal with uncertainty in the data and minimize its effect on fault detection Includes interval PCA (IPCA) and interval PLS (IPLS) fault detection methods to enhance the quality of fault detection Provides model-based detection techniques for the improvement of monitoring processes using state estimation-based fault detection approaches Demonstrates the effectiveness of the proposed strategies by conducting simulation and experimental studies on synthetic data
Book Synopsis Principal Component Analysis by : I.T. Jolliffe
Download or read book Principal Component Analysis written by I.T. Jolliffe and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principal component analysis is probably the oldest and best known of the It was first introduced by Pearson (1901), techniques ofmultivariate analysis. and developed independently by Hotelling (1933). Like many multivariate methods, it was not widely used until the advent of electronic computers, but it is now weIl entrenched in virtually every statistical computer package. The central idea of principal component analysis is to reduce the dimen sionality of a data set in which there are a large number of interrelated variables, while retaining as much as possible of the variation present in the data set. This reduction is achieved by transforming to a new set of variables, the principal components, which are uncorrelated, and which are ordered so that the first few retain most of the variation present in all of the original variables. Computation of the principal components reduces to the solution of an eigenvalue-eigenvector problem for a positive-semidefinite symmetrie matrix. Thus, the definition and computation of principal components are straightforward but, as will be seen, this apparently simple technique has a wide variety of different applications, as weIl as a number of different deri vations. Any feelings that principal component analysis is a narrow subject should soon be dispelled by the present book; indeed some quite broad topics which are related to principal component analysis receive no more than a brief mention in the final two chapters.
Download or read book Terra 2008 written by Leslie Rainer and published by Getty Publications. This book was released on 2011-06-14 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Book Synopsis Acoustics of Porous Media by : Thierry Bourbié
Download or read book Acoustics of Porous Media written by Thierry Bourbié and published by Editions TECHNIP. This book was released on 1987 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anode Baking written by Felix Keller and published by . This book was released on 2008 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Light Metals 2017 by : Arne P. Ratvik
Download or read book Light Metals 2017 written by Arne P. Ratvik and published by Springer. This book was released on 2017-02-10 with total page 1385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Light Metals symposia at the TMS Annual Meeting & Exhibition present the most recent developments, discoveries, and practices in primary aluminum science and technology. The annual Light Metals volume has become the definitive reference in the field of aluminum production and related light metal technologies. The 2017 collection includes papers from the following symposia:Alumina and BauxiteAluminum Alloys, Processing, and CharacterizationAluminum Reduction TechnologyCast Shop TechnologyCast Shop Technology: Recycling and Sustainability Joint SessionElectrode TechnologyThe Science of Melt Refining: An LMD Symposium in Honor of Christian Simensen and Thorvald Abel Engh
Book Synopsis Image and Cognition by : Michel Denis
Download or read book Image and Cognition written by Michel Denis and published by . This book was released on 1991 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Denis explores the role of imagery in reasoning, in resolving problems and in planning human action, and more generally, in human thought. The text is designed for the upper-level undergraduate or postgraduate in cognitive psychology or neuroscience.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251305536 Total Pages :435 pages Book Rating :4.2/5 (513 download)
Book Synopsis Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea by : Food and Agriculture Organization of the United Nations
Download or read book Regional Conference on building a future for sustainable small-scale fisheries in the Mediterranean and the Black Sea written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-10-31 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the report, the conference focused on the main challenges for the sustainable development of small-scale fisheries, including promoting political commitment and tailored strategies, raising awareness, and sharing knowledge.
Book Synopsis Product Life-Cycle Management by : Max Giordano
Download or read book Product Life-Cycle Management written by Max Giordano and published by John Wiley & Sons. This book was released on 2012-12-17 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a comprehensive view of the most recent major international research in the field of tolerancing, and is an excellent resource for anyone interested in Computer Aided Tolerating. It is organized into 4 parts. Part 1 focuses on the more general problems of tolerance analysis and synthesis, for tolerancing in mechanical design and manufacturing processes. Part 2 specifically highlights the simulation of assembly with defects, and the influence of tolerances on the quality of the assembly. Part 3 deals with measurement aspects, and quality control throughout the life cycle. Different measurement technologies and methods for estimating uncertainty are considered. In Part 4, different aspects of tolerancing and their interactions are explored, from the definition of functional requirement to measurement processes in a PLM approach.
Book Synopsis Thermal Quadrupoles by : Denis Maillet
Download or read book Thermal Quadrupoles written by Denis Maillet and published by . This book was released on 2000-11-17 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This superb text describes a novel and powerful method for allowing design engineers to firstly model a linear problem in heat conduction, then build a solution in an explicit form and finally obtain a numerical solution. It constitutes a modelling and calculation tool based on a very efficient and systemic methodological approach. Solving the heat equations through integral transforms does not constitute a new subject. However, finding a solution generally constitutes only one part of the problem. In design problems, an initial thermal design has to be tested through the calculation of the temperature or flux field, followed by an analysis of this field in terms of constraints. A modified design is then proposed, followed by a new thermal field calculation, and so on until the right design is found. The thermal quadrupole method allows this often painful iterative procedure to be removed by allowing only one calculation. The chapters in this book increase in complexity from a rapid presentation of the method for one dimensional transient problems in chapter one, to non uniform boundary conditions or inhomogeneous media in chapter six. In addition, a wide range of corrected problems of contemporary interest are presented mainly in chapters three and six with their numerical implementation in MATLAB (r) language. This book covers the whole scope of linear problems and presents a wide range of concrete issues of contemporary interest such as harmonic excitations of buildings, transfer in composite media, thermal contact resistance and moving material heat transfer. Extensions of this method to coupled transfers in a semi-transparent medium and to mass transfer in porous media are considered respectively in chapters seven and eight. Chapter nine is devoted to practical numerical methods that can be used to inverse the Laplace transform. Written from an engineering perspective, with applications to real engineering problems, this book will be of significant interest not only to researchers, lecturers and graduate students in mechanical engineering (thermodynamics) and process engineers needing to model a heat transfer problem to obtain optimized operating conditions, but also to researchers interested in the simulation or design of experiments where heat transfer play a significant role.
Author :Canada. Department of Fisheries and Oceans Publisher :Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir ISBN 13 : Total Pages :376 pages Book Rating :4.:/5 (31 download)
Book Synopsis Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? by : Canada. Department of Fisheries and Oceans
Download or read book Le Golfe Du Saint-Laurent--petit Océan Ou Grand Estuaire? written by Canada. Department of Fisheries and Oceans and published by Peches Et Oceans Direction Generale Des Communications = Fisheries and Oceans Communications Dir. This book was released on 1991 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a workshop, the scientific reviews and the contributed papers presented at the symposium. The document presents a brief historical summary of marine research in the Gulf; reports the discussions, conclusions and recommendations of the different working groups on oceanography (physics, biology, chemistry and sedimentology) and on the fishery (fish and invertebrates); then presents the discussions of each multidisciplinary working group, centered around how the St. Lawrence system may be used as a natural laboratory which will contribute to the solution of major long-term problems of conservation of natural resources and of the quality of the environment.
Book Synopsis Global Change in the Holocene by : John Birks
Download or read book Global Change in the Holocene written by John Birks and published by Routledge. This book was released on 2014-02-24 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Holocene spans the 11,500 years since the end of the last Ice Age and has been a period of major global environmental change. However the rate of change has accelerated during the last hundred years, due largely to human impacts and this has led to a growing concern for the future of our environmental resources. Global Change in the Holocene demonstrates how reconstructing the record of past environmental change can provide us with essential knowledge about how our environment works and presents the reader with an informed viewpoint from which to project realistic future scenarios. The book brings together key techniques that are widely used in Holocene research, such as radiocarbon dating, dendrochronology and sediment analysis and offers a comprehensive analysis of various archives of environmental change including instrumental and documentary records, corals, lake sediments, glaciers and ice cores. This reference will be an informative and cutting-edge resource for all researchers in the fields of climate change, environmental science, geography, palaeoecology and archaeology.
Book Synopsis Variation in Working Memory by : Andrew Conway
Download or read book Variation in Working Memory written by Andrew Conway and published by Oxford University Press. This book was released on 2008-02-13 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Working memory--the ability to keep important information in mind while comprehending, thinking, and acting--varies considerably from person to person and changes dramatically during each person's life. Understanding such individual and developmental differences is crucial because working memory is a major contributor to general intellectual functioning. This volume offers a state-of-the-art, integrative, and comprehensive approach to understanding variation in working memory by presenting explicit, detailed comparisons of the leading theories. It incorporates views from the different research groups that operate on each side of the Atlantic, and covers working-memory research on a wide variety of populations, including healthy adults, children with and without learning difficulties, older adults, and adults and children with neurological disorders. A particular strength of this volume is that each research group explicitly addresses the same set of theoretical questions, from the perspective of both their own theoretical and experimental work and from the perspective of relevant alternative approaches. Through these questions, each research group considers their overarching theory of working memory, specifies the critical sources of working memory variation according to their theory, reflects on the compatibility of their approach with other approaches, and assesses their contribution to general working memory theory. This shared focus across chapters unifies the volume and highlights the similarities and differences among the various theories. Each chapter includes both a summary of research positions and a detailed discussion of each position. Variation in Working Memory achieves coherence across its chapters, while presenting the entire range of current theoretical and experimental approaches to variation in working memory.
