Download or read book S paration aveugle de sources bas e sur l utilisation des transform es spatiales quadratiques written by Laurent Giulieri and published by . This book was released on 2003 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le problème auquel on s'intéresse est l'étude de la séparation aveugle de sources dans le cadre des mélanges instantanés en utilisant des transformées spatiales quadratiques. Après une présentation de la problématique centrale et des principaux travaux s'y rapportant, les outils (diagonalisation et zéro-diagonalisation conjointe d'un ensemble de matrices, transformées bilinéaires et quadratiques avec comme cas particulier les représentationstemps-fréquence, extensions au cas vectoriel avec les transformées spatiales quadratiques) autour desquels s'articuleront les méthodes développées dans cette thèse, sont détaillés. Le travail original présenté dans ce manuscrit est l'étude des transformées spatiales quadratiques des mélanges de sources non bruités qui conduit à l'établissement de deux critères de sélection automatique des points temps-fréquence permettant la construction d'ensemble de matrices devant être diagonalisées et/ou zéro-diagonalisées conjointement. Le premier critère est destiné au cas des mélanges de signaux déterministes décorrélés préalablement blanchis, mélanges qui pourront être complexes. Le second critère, plus large, est destiné au cas des mélanges de signaux déterministes corrélés. L'étape de blanchiment est supprimée et les techniques de diagonalisation conjointe sous contrainte d'unitarité sont remplacées, au profit d'une technique sans contrainte, limitant les performances de séparation. On démontre qu'il est aussi pos-sible de résoudre le problème de manière analytique. Enfin l'effet du bruit sur les représentations temps-fréquence spatiales quadratiques est étudié afin d'élaborer de nouvelles stratégies de décision nécessaires à l'adaptation des critères de sélection automatique au cas bruité.
Download or read book Integrable Systems written by V. Babelon and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the International Conference on Integrable Systems in memory of J.-L. Verdier. It was held on July 1-5, 1991 at the Centre International de Recherches Mathematiques (C.I.R.M.) at Luminy, near Marseille (France). This collection of articles, covering many aspects of the theory of integrable Hamiltonian systems, both finite and infinite-dimensional, with an emphasis on the algebro-geometric meth ods, is published here as a tribute to Verdier who had planned this confer ence before his death in 1989 and whose active involvement with this topic brought integrable systems to the fore as a subject for active research in France. The death of Verdier and his wife on August 25, 1989, in a car accident near their country house, was a shock to all of us who were acquainted with them, and was very deeply felt in the mathematics community. We knew of no better way to honor Verdier's memory than to proceed with both the School on Integrable Systems at the C.I.M.P.A. (Centre International de Mathematiques Pures et Appliquees in Nice), and the Conference on the same theme that was to follow it, as he himself had planned them.
Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Download or read book The Development of the Number Field Sieve written by Arjen K. Lenstra and published by Springer. This book was released on 2006-11-15 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The number field sieve is an algorithm for finding the prime factors of large integers. It depends on algebraic number theory. Proposed by John Pollard in 1988, the method was used in 1990 to factor the ninth Fermat number, a 155-digit integer. The algorithm is most suited to numbers of a special form, but there is a promising variant that applies in general. This volume contains six research papers that describe the operation of the number field sieve, from both theoretical and practical perspectives. Pollard's original manuscript is included. In addition, there is an annotated bibliography of directly related literature.
Download or read book The Theory of Unitary Group Representations written by George Whitelaw Mackey and published by . This book was released on 1955 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Working with the Anthropological Theory of the Didactic in Mathematics Education written by Marianna Bosch and published by Routledge. This book was released on 2019-10-23 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the main research veins developed within the framework of the Anthropological Theory of the Didactic (ATD), a paradigm that originated in French didactics of mathematics. While a great number of publications on ATD are available in French and Spanish, Working with the Anthropological Theory of the Didactic in Mathematics Education is the first directed at English-speaking international audiences. Written and edited by leading researchers in ATD, the book covers all aspects of ATD theory and practice, including teaching applications. The chapters feature the most relevant and recent investigations presented at the 6th international conference on the ATD, offering a unique opportunity for an international audience interested in the study of mathematics teaching and learning to keep in touch with advances in educational research. The book is divided into four sections and the contributions explore key topics such as: The core concept of ‘praxeology’, including its development and functionalities The need for new teaching praxeologies in the paradigm of questioning the world The impact of ATD on the teaching profession and the education of teachers This is the second volume in the New Perspectives on Research in Mathematics Education. This comprehensive casebook is an indispensable resource for researchers, teachers and graduate students around the world.
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 Indian Rock Paintings of the Great Lakes written by Selwyn Dewdney and published by University of Toronto Press. This book was released on 1962-12-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes in word and illustration the results of an exciting quest on the part of its authors to discover and record Indian rock paintings of Northern Ontario and Minnesota. Numerous drawings were made from these pictographs at a hundred different sites; the originals range in age from four to five hundred years to a thousand, and were done with the simplest materials: fingers for brushes, fine clay impregnated with ferrous oxide giving the characteristic red paint. Where an overhanging rock protected a vertical face from dripping water or on dry, naked rock faces the Indians recorded the forest life with which they lived in intimate association—deer, caribou, rabbit, heron, trout, canoes, animal tracks—and also abstractions which puzzle and intrigue the modern viewer. Many of the paintings could only have been done from a canoe or a convenient rock ledge. Selwyn Dewdney travelled many thousands of miles by canoe to make the drawings of the pictographs which illustrate every page of this fascinating and attractive book. He provides also a general analysis of the materials used by the Indians, of their subject-matter and the artistic rendering given to it, and his artist's journal records in detail the sites he visited, the paintings he found at each, the comparisons among them that came to mind, the references to rock paintings in early literature of the Northwest. Kenneth E. Kidd contributes a valuable essay on the anthropological background of the area, linking the rock paintings with early cave art in, for example, France and Spain, describing the life of the Indians in the Shield country, and commenting on what the pictographs reveal of their makers' attitudes to their external world and of their thinking. This is a book which will appeal to a wide audience: to those interested in primitive art forms and in Canadian art in general, to all students of the early history of North America, to travellers who in increasing numbers follow the canoe trails of the Shield lakes and rivers.
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 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.
Download or read book Trichier written by Alessandra Ceretto and published by Lulu.com. This book was released on with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agricultural English written by Georgeta Raţă and published by Cambridge Scholars Publishing. This book was released on 2012-04-25 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural English is a collection of essays on the English of Agriculture. The approach is a linguistic one: the different aspects of the English used in the field of agriculture (agricultural practices, agricultural systems) and in some fields related to agriculture (agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, zoology) are analysed from a morphological (combination, derivation), syntactical (nominal phrases, verbal phrases), lexical and lexicographical, semantic (homonymy, semantic fields, synonymy, terminology), pragmatic (academic discourse, idiom, metaphor), etymological (etymon, Latin heritage), and contrastive (English–Croatian, English–French, English–German, English–Romanian, Romanian–English) points of view. The book will appeal to agriculturists, animal breeders, professors, researchers, students, and translators from Croatian-, English-, French-, German-, and Romanian-speaking countries, active in their own countries or abroad. The types of academic readership it would appeal to include academic teaching staff, researchers and students in the fields of agriculture and related fields – agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, and zoology.
Download or read book The RF and Microwave Handbook written by Mike Golio and published by CRC Press. This book was released on 2000-12-20 with total page 1377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent shift in focus from defense and government work to commercial wireless efforts has caused the job of the typical microwave engineer to change dramatically. The modern microwave and RF engineer is expected to know customer expectations, market trends, manufacturing technologies, and factory models to a degree that is unprecedented in the
Download or read book From Brows to Trust written by Zsófia Ruttkay and published by Springer Science & Business Media. This book was released on 2006-02-19 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: Embodied conversational agents (ECAs) are autonomous software entities with human-like appearance and communication skills. These agents can take on a number of different roles, for example, as an assistant, tutor, information provider, or customer service agent. They may also simply represent or entertain a user. The precise nature and benefits of different characteristics of ECAs requires careful investigation. Questions range from the function of an eyebrow raise to mechanisms for assessing and improving ECA trustworthiness. This book will help experts and designers in the specification and development of applications incorporating ECAs. Part 1 provides guidelines for evaluation methodologies and the identification of design and evaluation parameters. Part 2 demonstrates the importance of considering the user's perspective and interaction experience. Part 3 addresses issues in fine-tuning design parameters of ECAs and verifying the perceived effect. Finally, in Part 4 lessons learned from a number of application case studies are presented. The book is intended for both ECA researchers in academia and industry, and developers and designers interested in applying the technology.
Download or read book Water Flow and Solute Transport in Soils written by David Russo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: A year has passed since Eshel Bresler, my good friend and colleague, and a member of the editorial board of the Advanced Series in Agricultural Sciences, died suddenly while on a visit to the Chinese Academy of Sciences in Beijing. We had worked together for almost 30 years at the Institute of Soils and Water, ARO, The Volcani Center at Bet Dagan. At the very beginning of our scientific careers we cooperated directly and as a result one of our first publications was coauthored (Soil Sci. 101:205-209, 1966). Thereafter, our specific research interests diver sified, but we continued to work together, with similar approaches to research, and to strive towards the development of Israel soil science and its integration into general worldwide scientific progress. I don't need to emphasize Eshel's contribution to the understan ding of the processes governing water flow and solute transport pro cesses in soils and unsaturated zones. The contributions to this Volume by such a body of outstanding scientists shows the apprecia tion of the international scientific community to his research achievements.
Download or read book Radar Technology Encyclopedia written by David Knox Barton and published by Artech House Publishers. This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the quick, easy way to pinpoint the exact information you need from the 511-page Radar Technology Encyclopedia. The CD-ROM edition includes every page of the print edition -- explaining more than 5000 terms and concepts related to radar, antenna, and microwave technology. Edited by two leading radar experts from the US and Russia, the Encyclopedia includes descriptions and illustrations of all types of radar systems, including information on Russian systems that was previously unavailable outside of that country.
