Fusion multisource appliquee a la reconnaissance d'objets dans le milieu sous-marin PDF Download
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Author: Sylvie Daniel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Sylvie Daniel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: David Boulinguez
Publisher:
ISBN:
Category :
Languages : fr
Pages : 166
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Book Description
L’investigation du milieu marin est un domaine qui fait l'objet de travaux de recherche importants. Dans la plupart des secteurs d'applications (ingénierie offshore, secteur de la pêche, archéologie, océanographie, lutte anti sous-marine), l'un des problèmes majeurs concerne la classification des objets sous-marins, c'est-a-dire la différenciation des cibles immergées ou enfouies dans le sédiment. L’objectif de ce rapport est de proposer, grâce aux techniques de traitement du signal et des images, une méthode générale pour la reconnaissance des objets sous-marins. Une part essentielle du travail consiste à rechercher des paramètres pertinents capables de distinguer différents types d'objets. La première démarche proposée étudie la séparation des objets sous-marins en deux catégories : objets naturels et manufacturés. Différentes techniques d'amélioration de la résolution temporelle sont développées afin de séparer les deux échos dûs à la présence d'une coque pour les cibles manufacturées : l'algorithme music, l'analyse spectrale a l'ordre 3 et l'algorithme wrelax. Nous montrons que ce dernier répond le mieux au problème en termes de pouvoir de séparation et de robustesse au bruit. Nous nous intéressons ensuite à l'identification de la forme des objets à partir de l'information acoustique 2D et 3D. Cette partie traite de la recherche de paramètres capables de caractériser les formes. Trois méthodes fournissant des jeux de paramètres discriminants sont comparées. Pour caractériser la forme 2D : les descripteurs de Fourier, puis les descripteurs de Fourier améliorés par fusion floue. Pour caractériser la forme 3D : les invariants 3D. Une structure de classification supervisée, fondée sur un classifieur non-paramétrique et mise en place sur données synthétiques et réelles, permet de comparer les performances des différents paramètres proposés. Les résultats montrent la supériorité des invariants 3D en termes de pouvoir discriminant et de robustesse au bruit.
Author: Jean-François Augoyard
Publisher: McGill-Queen's Press - MQUP
ISBN: 0773576916
Category : Music
Languages : en
Pages : 230
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Book Description
Never before has the everyday soundtrack of urban space been so cacophonous. Since the 1970s, sound researchers have attempted to classify noise, music, and everyday sounds using concepts such as Pierre Shafer's sound object and R. Murray Schafer's soundscape. Recently, the most significant team of soundscape researchers in the world has been concerned with the effects of sounds on listeners.
Author: Abdelkébir Khatibi
Publisher: Editions L'Harmattan
ISBN: 2140014154
Category : Fiction
Languages : en
Pages : 162
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Book Description
Tattooed Memory (La Mémoire tatouée) is the first novel of the great Moroccan critic and novelist Abdelkébir Khatibi (1938-2009). Only one other novels has been translated into English (Love In Two Languages, 1991). Khatibi belongs to the generation following the foundational generation of writers such as Driss Chraïbi. For Khatibi's generation, French colonialism is a vibrant memory - but a memory from childhood. Tattooed Memory is part bildungsroman, part anticolonial treatise, and part language experiment, and it takes us from earliest childhood memory to young adulthood.
Author: David Cowley
Publisher: Archaeolingua
ISBN: 9789639911208
Category : Archaeological surveying
Languages : en
Pages : 0
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Book Description
Remote sensing is one of the main foundations of archaeological data, underpinning knowledge and understanding of the historic environment. The volume, arising from a symposium organised by the Europae Archaeologiae Consilium (EAC) and the Aerial Archaeology Research Group (AARG), provides up to date expert statements on the methodologies, achievements and potential of remote sensing with a particular focus on archaeological heritage management. Well-established approaches and techniques are set alongside new technologies and data-sources, with discussion covering relative merits and applicability, and the need for integrated approaches to understanding and managing the landscape. Discussions cover aerial photography, both modern and historic, LiDAR, satellite imagery, multi- and hyper-spectral data, sonar and geophysical survey, addressing both terrestrial and maritime contexts. Case studies drawn from the contrasting landscapes of Europe illustrate best practice and innovative projects.
Author: E. A. Hailwood
Publisher: Geological Society Publishing House
ISBN:
Category : Science
Languages : en
Pages : 450
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Author: Manfred A. Max-Neef
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 132
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Presents a people-centred approach to development.
Author: Gert A. Schultz
Publisher: Springer Science & Business Media
ISBN: 3642595839
Category : Science
Languages : en
Pages : 498
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Book Description
The book provides comprehensive information on possible applications of remote sensing data for hydrological monitoring and modelling as well as for water management decisions. Mathematical theory is provided only as far as it is necessary for understanding the underlying principles. The book is especially timely because of new programs and sensors that are or will be realised. ESA, NASA, NASDA as well as the Indian and the Brazilian Space Agency have recently launched satellites or developed plans for new sensor systems that will be especially pertinent to hydrology and water management. New techniques are presented whose structure differ from conventional hydrological models due to the nature of remotely sensed data.
Author: Dwight F. Reynolds
Publisher: Univ of California Press
ISBN: 0520926110
Category : Literary Criticism
Languages : en
Pages : 351
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Book Description
Autobiography is a literary genre which Western scholarship has ascribed mostly to Europe and the West. Countering this assessment and presenting many little-known texts, this comprehensive work demonstrates the existence of a flourishing tradition in Arabic autobiography. Interpreting the Self discusses nearly one hundred Arabic autobiographical texts and presents thirteen selections in translation. The authors of these autobiographies represent an astonishing variety of geographical areas, occupations, and religious affiliations. This pioneering study explores the origins, historical development, and distinctive characteristics of autobiography in the Arabic tradition, drawing from texts written between the ninth and nineteenth centuries c.e. This volume consists of two parts: a general study rethinking the place of autobiography in the Arabic tradition, and the translated texts. Part one demonstrates that there are far more Arabic autobiographical texts than previously recognized by modern scholars and shows that these texts represent an established and—especially in the Middle Ages—well-known category of literary production. The thirteen translated texts in part two are drawn from the full one-thousand-year period covered by this survey and represent a variety of styles. Each text is preceded by a brief introduction guiding the reader to specific features in the text and providing general background information about the author. The volume also contains an annotated bibliography of 130 premodern Arabic autobiographical texts. In addition to presenting much little-known material, this volume revisits current understandings of autobiographical writing and helps create an important cross-cultural comparative framework for studying the genre.
Author: James Olney
Publisher: Princeton University Press
ISBN: 1400856310
Category : Biography & Autobiography
Languages : en
Pages : 374
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Professor Olney gathers together in this book some of the best and most important writings on autobiography produced in the past two decades. Originally published in 1980. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
