Author: Marc PoulinPublisher:
ISBN:
Category :
Languages : fr
Pages : 222
Book Description
Application du filtrage adapté à l'analyse spatiale
Author: Marc PoulinCanadiana
Author: SYNTHESE ET ANALYSE DE SIGNATURES TEMPORELLES PAR FILTRAGE SPATIAL - APPLICATION A L'IDENTIFICATION D'OBJETS ET LA RECONNAISSANCE D'ATTITUDES
Author: EMMANUEL.. QUEMENERPublisher:
ISBN:
Category :
Languages : fr
Pages : 140
Book Description
LES TECHNIQUES MODERNES DE TELEDETECTION OFFRENT SUR UNE CIBLE UNE MASSE CROISSANTE DE SIGNAUX DE NATURES TRES DIFFERENTES : SPECTRALE (DIFFERENTS CAPTEURS), SPATIALE (IMAGES) ET TEMPORELLE (OBSERVATION SUR UN LAPS DE TEMPS). L'ANALYSE GLOBALE, RENDUE PLUS DIFFICILE PAR CETTE NECESSITE D'ASSOCIER UNE MASSE D'INFORMATIONS HETEROGENES, DEVIENT CRITIQUE LORSQUE DES CONTRAINTES OPERATIONNELLES SONT POSEES, NOTAMMENT LORS D'APPLICATIONS DITES TEMPS REEL. UTILISANT LE MODELE DE FORMATION D'UNE REPONSE D'ANTENNE SYNTHETIQUE, UNE SIGNATURE TEMPORELLE SERA CREEE A PARTIR DE SEQUENCES D'IMAGES. LA CREATION PUIS L'UTILISATION D'UNE SIGNATURE TEMPORELLE, IMAGE CARACTERISTIQUE DE LA CIBLE ET DE SON ATTITUDE, SERONT SUCCESSIVEMENT ABORDEES POUR PARVENIR A LA RECONNAISSANCE DE LA CIBLE PAR L'ATTITUDE. CES OPERATIONS DE SYNTHESE ET D'ANALYSE SONT REALISEES A L'AIDE D'UN OUTIL SIMPLE, AUTANT DANS SA STRUCTURE QUE PAR SES IMPLANTATIONS : LE FILTRAGE SPATIAL. IL SERA DANS CETTE OPTIQUE ASSOCIE A UN PRETRAITEMENT LINEAIRE, LEQUEL PERMETTRA D'ACCEDER, LORS DE LA SYNTHESE, A UN NIVEAU DE DETAIL DONNE. LA VALIDATION DE CETTE APPROCHE SYNTHESE ET ANALYSE SERA TOUT D'ABORD MENEE SUR DES ATTITUDES DE VISAGES, PUIS SUR DES SIGNAUX RADAR TEMPS-FREQUENCE. CETTE DERNIERE DEMONTRERA ALORS QUE LA PUISSANCE DE CETTE TECHNIQUE REPOSE EN MAJORITE SUR LA QUALITE DES BASES DE REFERENCES ADJOINTES AU FILTRAGE SPATIAL. AINSI, FACE A DES TRAITEMENTS PUISSANTS, COMPLIQUES ET DONC NECESSAIREMENT COUTEUX EN TEMPS DE CALCUL, UNE APPROCHE SIMPLE VOIRE SOMMAIRE CONSERVE SON INTERET. ASSOCIE A DES BASES DE DONNEES OU DE REFERENCES, LE FILTRAGE SPATIAL RESTE ENCORE ET DEMEURE TOUJOURS UN BON OUTIL DE RECONNAISSANCE DE FORMES, MAIS AUSSI DE FORMES PAR L'ATTITUDE. SUR CETTE BASE, UNE DISCUSSION DES IMPLANTATIONS OPTIQUE ET NUMERIQUE SERA DEVELOPPEE, FIXANT LES AVANTAGES RESPECTIFS DE CHACUNE DANS LE CADRE CONSIDERE.
Mélanges offerts à André Journaux
Author: André JournauxPublisher:
ISBN:
Category : Conservation of natural resources
Languages : fr
Pages : 352
Book Description
"Publications scientifiques de A. Journaux": pages 12-18.
Proceedings of the International Symposium on Remote Sensing of Environment
Author: PASCAL.
Author: Canadian Journal of Electrical and Computer Engineering
Author: Publisher:
ISBN:
Category : Computer engineering
Languages : en
Pages : 598
Book Description
Comptes Rendus
Author: Modelling the Wireless Propagation Channel
Author: Fernando P¿rez Font¿nPublisher: John Wiley & Sons
ISBN: 0470751738
Category : Technology & Engineering
Languages : en
Pages : 268
Book Description
A practical tool for propagation channel modeling with MATLAB® simulations. Many books on wireless propagation channel provide a highly theoretical coverage, which for some interested readers, may be difficult to follow. This book takes a very practical approach by introducing the theory in each chapter first, and then carrying out simulations showing how exactly put the theory into practice. The resulting plots are analyzed and commented for clarity, and conclusions are drawn and explained from the obtained results. Key features include: A unique approach to propagation channel modeling with accompanying MATLAB® simulations to demonstrate the theory in practice Contains step by step commentary and analysis of the obtained simulation results in order to provide a comprehensive and structured learning tool Covers a wide range of topics including shadowing effects, coverage and interference, Multipath Narrowband channel, Multipath Wideband channel, propagation in micro and pico-cells, the land mobile satellite (LMS) channel, the directional Multipath channel and MIMO and propagation effects in fixed radio links (terrestrial and satellite) The book comes with an accompanying website that contains the MATLAB® simulations and allows readers to try them out themselves Well suited for lab-use, as reference and as a self-learning tool both for advanced students and professionals Modeling the Wireless Propagation Channel: A simulation approach with MATLAB® will be best suited for postgraduate (Masters and PhD) students and practicing engineers in telecommunications and electrical engineering fields, who are seeking to familiarise themselves with the topic without too many formulas. The book will also be of interest to network engineers, system engineers and researchers
Differentiable Measures and the Malliavin Calculus
Author: Vladimir Igorevich BogachevPublisher: American Mathematical Soc.
ISBN: 082184993X
Category : Mathematics
Languages : en
Pages : 506
Book Description
This book provides the reader with the principal concepts and results related to differential properties of measures on infinite dimensional spaces. In the finite dimensional case such properties are described in terms of densities of measures with respect to Lebesgue measure. In the infinite dimensional case new phenomena arise. For the first time a detailed account is given of the theory of differentiable measures, initiated by S. V. Fomin in the 1960s; since then the method has found many various important applications. Differentiable properties are described for diverse concrete classes of measures arising in applications, for example, Gaussian, convex, stable, Gibbsian, and for distributions of random processes. Sobolev classes for measures on finite and infinite dimensional spaces are discussed in detail. Finally, we present the main ideas and results of the Malliavin calculus--a powerful method to study smoothness properties of the distributions of nonlinear functionals on infinite dimensional spaces with measures. The target readership includes mathematicians and physicists whose research is related to measures on infinite dimensional spaces, distributions of random processes, and differential equations in infinite dimensional spaces. The book includes an extensive bibliography on the subject.