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Source : I-revues

Double formation de voies pour la séparation et l’identification d’ondes : applications en contexte fortement bruité et à la campagne FAF03

NICOLAS, Barbara et al. (2008)

Ocean Acoustic Tomography aims at estimating ocean celerity variations using wave travel times in the ocean. Estimation of the variations of these travel times and identification of each acoustic arrival with a theoretical ray path in the medium is necessary for tomographic purposes. These ...

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Source : I-revues

13 - Classification des méthodes da calibration et d'auto-calibration d'antenne

MARSAL (A.) et al. (1993)

The purpose of this article is to present a classification of the main tnethods for the estimation of the parameters of both the propagation and the reception models of the received signals along an array (calibration or self-calibration) . These methods are classified according to the a priori ...

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Source : I-revues

07 - Bilan énergétique du couplage résonnant entre un faisceau borné et un guide d'onde

PERDIJON, J. (1985)

A device has been developed for the measurement of the amplitudes of waves radiated in water, from one side or the other of a plate guiding continuous Lamb waves . A mathematical model is proposed to represent the variation of these amplitudes along the plate . These results are applied to pulses ...

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Source : I-revues

Asservissement visuel qualitatif pour la navigation

REMAZEILLES, Anthony et al. (2007)

We propose in this article a novel approach for vision-based control of a robotic system during a navigation task. This technique is based on a topological representation of the environment in which the scene is directly described within the sensor space, by an image database acquired off-line. ...

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Source : I-revues

Inversion géoacoustique d'un canal très petits fonds à partir des navires en mouvement Traitement incohérent

VALLEZ, S. et al. (2008)

In the context of the passive geoacoustic inversion, this manuscript proposes a new Inversion Method suitable for very shallow water environments (10 to 30 m) from the broadband noise produced by ships of opportunity. The solution is dedicated to a small number of hydrophones and is easy to ...

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Source : I-revues

Multirésolution adaptative pour un système de vision ultra faible consommation avec détection de mouvement et suivi intégrés

VERDANT, Arnaud et al. (2009)

Abstract – An ultra low power vision chip dedicated to video surveillance is presented. Based on a multiresolution acquisition scheme, this CMOS image sensor (CIS) performs integrated adaptive motion detection and tracking by focusing on targets with high resolution while keeping background in low ...

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Source : I-revues

1 - Fusion de données capteurs en vue de la localisation absolue d'un robot mobile par une méthode basée sur la théorie des possibilités. Comparaison avec le filtre de Kalman

MAAREF (H.) et al. (1999)

In order to improve autonomous system, it is necessary to determine accurately its position . In this paper, a method based on possibility theory has been developed in the experimental framework of the localisation of a miniature mobile robot from odometry reading and exteroceptive sensors into an ...

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Source : I-revues

5 - Fusion d'informations incertaines : application d'aide au guidage d'engins agricoles

CHATEAU (Thierry) et al. (2000)

This Paper presents an application of automatic guidance of a combine harvester by data fusion. Both a laser rangefinder and a monochromatic camera provide redundant information. The problem of feature combination is presented: three models are proposed (probabilities, possibilities and Dempster ...

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Source : I-revues

17 - Identification aveugle aux ordres supérieurs

CARDOSO (J.-F.) (1993)

A `blind approach' is proposed to address the issue of ill calibration . It is shown Chat, even when the array manifold is completely unkown, the directional vectors can be identified whenever the source signais can be assumed statistically independent and not normally distributed. The fourth-order ...

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Source : I-revues

Extraction de caractéristiques non linéaire et discriminante : application à la classification de phonèmes

GAS, Bruno et al. (2007)

In this article, we propose to study a speech coding method applied to the recognition of phonemes. The proposed model (the Neural Predictive Coding, NPC) and its two declinations (NPC-2 and DFE-NPC) is a connectionist model (multilayer perceptron) based on the non linear prediction of the speech ...

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