Download or read book Elaboration d une m thode de d tection de texture par les champs de Gibbs Markhov written by Sid Ahmed Kherzat and published by . This book was released on 1997 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'OBJET DE CETTE ETUDE EST DE PRESENTER UNE METHODE DE DETECTION DE TEXTURE. CETTE METHODE UTILISE DES MODELES MATHEMATIQUES LARGEMENT UTILISES EN TRAITEMENT D'IMAGE, CONNUS SOUS LE NOM DE MODELES MARKOVIENS. DANS LA PREMIERE PARTIE, NOUS PRESENTONS LES DIFFERENTS ELEMENTS D'ANALYSE DE LA TEXTURE AINSI QUE LE FORMALISME DES CHAMPS MARKOVIENS. POUR MODELISER LA TEXTURE, NOUS UTILISONS LE MODELE A NIVEAU DE GRIS, PROPOSE PAR H. DERIN DONT NOUS PROPOSONS UNE NOUVELLE STRUCTURE POUR LE POTENTIEL D'ORDRE 1. CETTE STRUCTURE FAIT APPEL A DEUX PARAMETRES. ILS ONT L'AVANTAGE DE VEHICULER L'INFORMATION SUR LES NIVEAUX DE GRIS PREDOMINANTS QUE RENFERME LA TEXTURE A ANALYSER. LES PARAMETRES ISSUS DE CE MODELE SONT UTILISES POUR CONSTRUIRE LE VECTEUR D'ATTRIBUTS DE TEXTURE. NOUS PRESENTONS ENSUITE L'ALGORITHME D'EXTRACTION DES ATTRIBUTS DE TEXTURE. NOUS PROPOSONS DEUX APPROCHES SYSTEMATIQUES POUR ESTIMER LES PARAMETRES DU MODELE. LA PREMIERE APPROCHE UTILISE LE MAXIMUM DE LA PROBABILITE JOINTE LOCALE. TANDIS QUE LA SECONDE UTILISE LA MOYENNE LOCALE DES PROBABILITES JOINTES. LA COMPARAISON DES RESULTATS DE L'ESTIMATION DE CES DEUX APPROCHES PAR RAPPORT A L'APPROCHE DE H. DERIN MONTRE QUE L'APPROCHE, UTILISANT LE MAXIMUM DE LA PROBABILITE JOINTE LOCALE, EST LA PLUS ROBUSTE. NOUS AVONS ENSUITE MENE UNE ETUDE EXPERIMENTALE ET COMPARATIVE DANS LAQUELLE DEUX MESURES - INDICE DE DISCRIMINATION ET TAUX DE CLASSEMENT - SONT UTILISES POUR EVALUER LA PERTINENCE DU VECTEUR D'ATTRIBUTS RETENU PAR RAPPORT AU VECTEUR D'ATTRIBUTS DE H. DERIN. LES RESULTATS EXPERIMENTAUX MONTRENT L'EFFICACITE DE LA METHODE PROPOSEE POUR LA DETECTION DES TEXTURES CHOISIES. DANS LA DEUXIEME PARTIE, NOUS ABORDONS LES TECHNIQUES RECENTES DE SEGMENTATION DES IMAGES. NOUS PROPOSONS DE TESTER L'EFFICACITE DE LA METHODE D'EXTRACTION LORSQU'ELLE EST ENGAGEE DANS UNE PROCEDURE DE SEGMENTATION SUPERVISEE (CRITERE DE DECISION GEOMETRIQUE) OU DE SEGMENTATION MARKOVIENNE NON-SUPERVISEE (CRITERE DE BAYES) PAR L'ICM. SELON LE CRITRE DU POURCENTAGE DE PIXELS BIEN CLASSES, LES DEUX PROCEDURES FOURNISSENT DES RESULTATS SATISFAISANTS ET ASSEZ PROCHES. ENFIN, NOUS EFFECTUONS UNE ETUDE COMPARATIVE ENTRE L'APPROCHE D'ANALYSE MARKOVIENNE PROPOSEE ET LA METHODE D'ANALYSE PAR LES MATRICES DE COOCCURRENCE DANS LE CADRE D'UNE APPLICATION DE SEGMENTATION D'IMAGES IRM.
Download or read book Le Golfe Du Saint Laurent petit Oc an 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.
Download or read book Fields Medallists Lectures written by Michael Atiyah and published by World Scientific. This book was released on 1997-10-13 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Fields Medal does not have the same public recognition as the Nobel Prizes, they share a similar intellectual standing. It is restricted to one field - that of mathematics - and an age limit of 40 has become an accepted tradition. Mathematics has in the main been interpreted as pure mathematics, and this is not so unreasonable since major contributions in some applied areas can be (and have been) recognized with Nobel Prizes. The restriction to 40 years is of marginal significance, since most mathematicians have made their mark long before this age.A list of Fields Medallists and their contributions provides a bird's eye view of mathematics over the past 60 years. It highlights the areas in which, at various times, greatest progress has been made. This volume does not pretend to be comprehensive, nor is it a historical document. On the other hand, it presents contributions from 22 Fields Medallists and so provides a highly interesting and varied picture.The contributions themselves represent the choice of the individual Medallists. In some cases the articles relate directly to the work for which the Fields Medals were awarded. In other cases new articles have been produced which relate to more current interests of the Medallists. This indicates that while Fields Medallists must be under 40 at the time of the award, their mathematical development goes well past this age. In fact the age limit of 40 was chosen so that young mathematicians would be encouraged in their future work.The Fields Medallists' Lectures is now available on CD-ROM. Sections can be accessed at the touch of a button, and similar topics grouped together using advanced keyword searches.
Download or read book Local Approximation Techniques in Signal and Image Processing written by Vladimir I︠A︡kovlevich Katkovnik and published by SPIE-International Society for Optical Engineering. This book was released on 2006 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with a wide class of novel and efficient adaptive signal processing techniques developed to restore signals from noisy and degraded observations. These signals include those acquired from still or video cameras, electron microscopes, radar, X-rays, or ultrasound devices, and are used for various purposes, including entertainment, medical, business, industrial, military, civil, security, and scientific. In many cases useful information and high quality must be extracted from the imaging. However, often raw signals are not directly suitable for this purpose and must be processed in some way. Such processing is called signal reconstruction. This book is devoted to a recent and original approach to signal reconstruction based on combining two independent ideas: local polynomial approximation and the intersection of confidence interval rule.
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.
Download or read book GIS and Spatial Analysis in Veterinary Science written by Peter A. Durr and published by Cabi. This book was released on 2004 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is probably the first to review the subject of geographical information systems (including remote sensing) and spatial analysis as applied to veterinary science. Topics covered include the application of GIS to epidemic disease response, to companion animal epidemiology and to the management of wildlife diseases. There are also chapters on more general issues such as parallels with human health and spatial statistics in the biomedical sciences.
Download or read book Physical Aspects of Soil Water and Salts in Ecosystems written by A. Hadas 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: The papers collected in this book were given and discussed at the symposium on "Soil water physics and technology", which was held in Rehovot, Israel, from August 19th-September 4th, 1971. It was sponsored by the International Society of Soil Science (1.S.S.S.) through its Commissions I (soil physics) and VI (soil technology), and organized by the Israeli Soil Science Society. Thanks are due to the Editors for having assembled contributions and discussion remarks into a well-rounded, coherent book. The subjects covered in this book are the theoretical and practical aspects of the following topics: water movement in soils, soil-water interactions, evaporation from soil and plants, water requirements of crops, ion activity and migration in soils, soilwater management and salinity. In as much as these contributions were not solicited, they represent ideas and subjects considered important by the authors and debators. In science, one often finds a gap between basic research and practical application. If reading this book creates a feeling of an apparent lack of balance between theory and practice, this represents the state of our science today, and the thoughtful reader can and will recognize that much remains to be done. W. R. GARDNER T.]. MAR5HAL President, Commission I President, Commission VI 1.5.5.5.
Download or read book Simplicity Ideals of Practice in Mathematics and the Arts written by Roman Kossak and published by Springer. This book was released on 2017-06-28 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: To find "criteria of simplicity" was the goal of David Hilbert's recently discovered twenty-fourth problem on his renowned list of open problems given at the 1900 International Congress of Mathematicians in Paris. At the same time, simplicity and economy of means are powerful impulses in the creation of artworks. This was an inspiration for a conference, titled the same as this volume, that took place at the Graduate Center of the City University of New York in April of 2013. This volume includes selected lectures presented at the conference, and additional contributions offering diverse perspectives from art and architecture, the philosophy and history of mathematics, and current mathematical practice.
Download or read book Climate Variability and Change written by Flow Regimes from International Experimental and Network Data (Project) and published by . This book was released on 2006 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains 117 reviewed papers from over 30 countries, published in English, French and Spanish, which reflect both international dimension of FRIEND and the key challenges facing hydrologists in the 21st century.
Download or read book Determinism Holism and Complexity written by Claudio Pellegrini and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determinism, holism and complexity: three epistemological attitudes that have easily identifiable historical origins and developments. Galileo believed that it was necessary to "prune the impediments" to extract the mathematical essence of physical phenomena, to identify the math ematical structures representing the underlying laws. This Galilean method was the key element in the development of Physics, with its extraordinary successes. Nevertheless the method was later criticized because it led to a view of nature as essentially "simple and orderly", and thus by choosing not to investigate several charac teristics considered as an "impediment", several essential aspects of the phenomenon under investigation might be left out. The Galilean point of view also contains an acknowledgement of the central role played by the causal nexus among phenomena. The mechanistic-deterministic de scription of reality - for instance, a la Laplace - although acknowledging that it is not possible to predict phenomena exactly owing to unavoid able measurement error, is based on the recognition of the their causal nature, even in an ontological sense. Consequently, deterministic predic tion became the methodological fulcrum of mathematical physics. But although mechanistic determinism has had and, in many cases, still has, considerable success in Physics, in other branches of science this situa tion is much less favourable.
Download or read book Miscellaneous Insects written by Henry Elijah Summers and published by . This book was released on 1900 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book All it Is It s a Carnival written by Mária Németh Lenke and published by . This book was released on 2007 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Symbolic Data written by Hans-Hermann Bock and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most recent methods for analyzing and visualizing symbolic data. It generalizes classical methods of exploratory, statistical and graphical data analysis to the case of complex data. Several benchmark examples from National Statistical Offices illustrate the usefulness of the methods. The book contains an extensive bibliography and a subject index.
Download or read book Mathematical Research Today and Tomorrow written by Carles Casacuberta and published by Springer. This book was released on 2006-11-15 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Symposium on the Current State and Prospects of Mathematics was held in Barcelona from June 13 to June 18, 1991. Seven invited Fields medalists gavetalks on the development of their respective research fields. The contents of all lectures were collected in the volume, together witha transcription of a round table discussion held during the Symposium. All papers are expository. Some parts include precise technical statements of recent results, but the greater part consists of narrative text addressed to a very broad mathematical public. CONTENTS: R. Thom: Leaving Mathematics for Philosophy.- S. Novikov: Role of Integrable Models in the Development of Mathematics.- S.-T. Yau: The Current State and Prospects of Geometry and Nonlinear Differential Equations.- A. Connes: Noncommutative Geometry.- S. Smale: Theory of Computation.- V. Jones: Knots in Mathematics and Physics.- G. Faltings: Recent Progress in Diophantine Geometry.
Download or read book Finite Dimensional Linear Algebra written by Mark S. Gockenbach and published by CRC Press. This book was released on 2011-06-15 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linear algebra forms the basis for much of modern mathematics—theoretical, applied, and computational. Finite-Dimensional Linear Algebra provides a solid foundation for the study of advanced mathematics and discusses applications of linear algebra to such diverse areas as combinatorics, differential equations, optimization, and approximation. The author begins with an overview of the essential themes of the book: linear equations, best approximation, and diagonalization. He then takes students through an axiomatic development of vector spaces, linear operators, eigenvalues, norms, and inner products. In addition to discussing the special properties of symmetric matrices, he covers the Jordan canonical form, an important theoretical tool, and the singular value decomposition, a powerful tool for computation. The final chapters present introductions to numerical linear algebra and analysis in vector spaces, including a brief introduction to functional analysis (infinite-dimensional linear algebra). Drawing on material from the author’s own course, this textbook gives students a strong theoretical understanding of linear algebra. It offers many illustrations of how linear algebra is used throughout mathematics.
Download or read book GIS Modules and Distributed Models of the Watershed written by Task Committee on GIS Modules and Distributed Models of the Watershed and published by ASCE Publications. This book was released on 1999-01-01 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by the Task Committee on GIS Modules and Distributed Models of the Watershed of ASCE. This report guides professionals in selecting the most advantageous applications of geographic information system (GIS) modules and distributed models for watershed runoff. Recent advances in technology offer hydrologic engineers, watershed managers, and data collection agencies unprecedented capabilities for storing and manipulating data. With the advent of Digital Elevation Models (DEM), Triangulated Irregular Networks (TIN), Digital Line Graphs (DLG), and GIS software, the use of watershed modeling among industry professionals has increased at an incredible rate. With this growth, it is increasingly difficult for practitioners to choose the most effective use of the technology. This report identifies state-of-the-art GIS hydrology analysis software and techniques, as well as GIS types and map projections. It covers data commonly required for hydrologic analysis, limitations of available data, and the integration of watershed hydrological analysis software and GIS techniques. The appendix highlights nine examples of watershed modeling systems, including the Watershed Modeling System (WMS), the Soil and Water Assessment Tool (SWAT), and the Hydrologic Model CASC2D.
Download or read book Impacts of Climate Change and Climate Variability on Hydrological Regimes written by Jan C. van Dam and published by Cambridge University Press. This book was released on 2003-10-16 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the implications of possible climate changes and variability on both global and regional water resources.
