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Статті в журналах з теми "Détection du locuteur actif"
de COLIGNY, M., and A. DOUERIN. "DÉTECTION DE FRÉQUENCE ET DE PHASE EN CONTRÔLE ACTIF SYNCHRONE." Le Journal de Physique IV 02, no. C1 (April 1992): C1–523—C1–526. http://dx.doi.org/10.1051/jp4:19921113.
Повний текст джерелаBazus, Léa, Nicolas Cimetiere, Laurent Legentil, Guy Randon, and Dominique Wolbert. "Recherche de dérivés conjugués de médicaments dans l’eau de surface et en cours de potabilisation." Revue des sciences de l’eau 28, no. 1 (April 21, 2015): 19–25. http://dx.doi.org/10.7202/1030003ar.
Повний текст джерелаBarbaud, Philippe. "Fondements grammaticaux de l’acquisition des mots composés." Canadian Journal of Linguistics/Revue canadienne de linguistique 36, no. 3 (September 1991): 215–53. http://dx.doi.org/10.1017/s000841310002154x.
Повний текст джерелаRouffiac, K., G. Boudet, P. Bailly, I. Biat, F. Dutheil, and A. Chamoux. "Détection des sujets à haut risque cardiovasculaire : bilan de sept années de dépistage actif et stratégie d’action en milieu de travail." Archives des Maladies Professionnelles et de l'Environnement 73, no. 3 (June 2012): 339–43. http://dx.doi.org/10.1016/j.admp.2012.02.008.
Повний текст джерелаBERTIN, H., N. NOYON, J. ENAULT, I. BAUDIN, J. F. ROBIN, M. ESPERANZA, and A. BREHANT. "Problématique du fosétyl-aluminium en eau potable." Techniques Sciences Méthodes 12 (January 20, 2023): 149–60. http://dx.doi.org/10.36904/202212149.
Повний текст джерелаOkwuraiwe, A. P., R. A. Audu, F. A. Ige, O. B. Salu, C. K. Onwuamah, and A. Z. Musa. "Long term outcomes of highly active antiretroviral therapy in HIV infected Nigerians and those co-infected with hepatitis B and C viruses." African Journal of Clinical and Experimental Microbiology 22, no. 1 (January 26, 2021): 67–73. http://dx.doi.org/10.4314/ajcem.v22i1.9.
Повний текст джерелаPILLON, Denis. "Introduction à la détection en sonar actif - Notions de base." Technologies radars et applications, November 2017. http://dx.doi.org/10.51257/a-v1-rad6714.
Повний текст джерелаGrandjean, Dominique, Capucine Gallet, Clothilde Julien, Marc Blondot, and Hélène Bacqué. "La détection biomédicale canine, un potentiel inexploité dans la gestion immédiate des crises épi/pandémiques et bioterrotistes… Application à la CoViD-19 dans le cadre du programme NOSAÏS." Bulletin de l'Académie vétérinaire de France 175 (2022). http://dx.doi.org/10.3406/bavf.2022.71013.
Повний текст джерелаWarren, Annabelle, Patrick Drogui, and Isabelle Laurion. "Revue sur l’état actuel des connaissances des procédés utilisés pour l’élimination des cyanobactéries et cyanotoxines lors de la potabilisation des eaux." 23, no. 4 (December 20, 2010): 391–412. http://dx.doi.org/10.7202/045100ar.
Повний текст джерелаTematio Nague, Lionel, Emmanuel Mpondo Mpondo, Emmanuel Nnanga Nga, J. S. N. Foumane Maniepi, V. Soppo Lobe, J. A. Metego Ntsama, A. Minyem, et al. "Formulation et fabrication des suppositoires antipaludiques d’Artémisia annua d’Ouest Cameroun en utilisant le beurre de karité comme excipient." Journal Africain de Technologie Pharmaceutique et Biopharmacie (JATPB) 2, no. 3 (December 20, 2023). http://dx.doi.org/10.57220/jatpb.v2i3.156.
Повний текст джерелаДисертації з теми "Détection du locuteur actif"
Gacon, Pierre. "Analyse d'images et modèles de formes pour la détection et la reconnaissance : application aux visages en multimédia." Phd thesis, Grenoble INPG, 2006. http://tel.archives-ouvertes.fr/tel-00207391.
Повний текст джерелаDans ce travail, notre objectif est d'obtenir une détection robuste et efficace des contours des lèvres de façon à être capable de restaurer les mouvements de la parole aussi fidèlement que possible.
Nous apportons une attention particulière au contour intérieur de la bouche dans la segmentation est une tâche difficile à cause des variations non-linéaires de l'apparence.
Nous proposons une méthode basée sur un modèle statistique de la forme et de l'apparence échantillonnée faisant intervenir des descripteurs gaussiens locaux d'apparence.
Notre hypothèse est que la réponse de ces descripteurs locaux peut être prédite à partir de la forme par le biais d'un réseau de neurones non-linéaire.
Nous avons d'abord testé cette hypothèse dans un cas mono-locuteur et l'avons ensuite généralisé à un cas multi-locuteurs en tenant de la variabilité
inter-personne.
A cet effet, nous adaptons progressivement notre modèle au locuteur traité en déterminant son apparence caractéristique.
A partir de notre segmentation de la bouche, nous pouvons ensuite générer un clone de la bouche de la personne dont les mouvements seront aussi proches que possible de ceux de l'originale.
Finalement, nous avons évalué quantitativement puis qualitativement la pertinence de notre méthode en menant une expérience qui a quantifié l'apport effectif de compréhension de notre schéma d'analyse/synthèse dans le cas de numéros de téléphone en milieu bruité.
Pouthier, Baptiste. "Apprentissage profond et statistique sur données audiovisuelles dédié aux systèmes embarqués pour l'interface homme-machine." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ4019.
Повний текст джерелаIn the rapidly evolving landscape of human-machine interfaces, deep learning has been nothing short of revolutionary. It has ushered in a new era of audio-visual algorithms, which, in turn, have expanded the horizons of potential applications and strengthened the performance of traditional systems. However, these remarkable advancements come with a caveat - many of these algorithms are computationally demanding, rendering their integration onto embedded devices a formidable task. The primary focus of this thesis is to surmount this limitation through a comprehensive optimization effort, addressing the critical factors of latency and accuracy in audio-visual algorithms. Our approach entails a meticulous examination and enhancement of key components in the audio-visual human-machine interaction pipeline; we investigate and make contributions to fundamental aspects of audio-visual technology in Active Speaker Detection and Audio-visual Speech Recognition tasks. By tackling these critical building blocks, we aim to bridge the gap between the vast potential of audio-visual algorithms and their practical application in embedded systems. Our research introduces efficient models in Active Speaker Detection. On the one hand, our novel audio-visual fusion strategy yields significant improvements over other state-of-the-art systems, featuring a relatively simpler model. On the other hand, we explore neural architecture search, resulting in the development of a compact yet efficient architecture for the Active Speaker Detection problem. Furthermore, we present our work on audio-visual speech recognition, with a specific emphasis on keyword spotting. Our main contribution targets the visual aspect of speech recognition with a graph-based approach designed to streamline the visual processing pipeline, promising simpler audio-visual recognition systems
Kerkeni, Leila. "Analyse acoustique de la voix pour la détection des émotions du locuteur." Thesis, Le Mans, 2020. http://www.theses.fr/2020LEMA1003.
Повний текст джерелаThe aim of this thesis is to propose a speech emotion recognition (SER) system for application in classroom. This system has been built up using novel features based on the amplitude and frequency (AM-FM) modulation model of speech signal. This model is based on the joint use of empirical mode decomposition (EMD) and the Teager-Kaiser energy operator (TKEO). In this system, the discrete (or categorical) emotion theory was chosen to represent the six basic emotions (sadness, anger, joy, disgust, fear and surprise) and neutral emotion.Automatic recognition has been optimized by finding the best combination of features, selecting the most relevant ones and comparing different classification approaches. Two reference speech emotional databases, in German and Spanish, were used to train and evaluate this system. A new database in French, more appropriate for the educational context was built, tested andvalidated
François, Dominique. "Détection et identification des occlusives et fricatives au sein du système indépendant du locuteur APHODEX." Nancy 1, 1995. http://www.theses.fr/1995NAN10044.
Повний текст джерелаRemy, Bertrand. "Étude et réalisation d'un imageur actif laser à compression d'impulsion." Paris 11, 1986. http://www.theses.fr/1986PA112346.
Повний текст джерелаThe thesis describes the breadboard of an imaging CO₂ laser radar based upon the use of a CW waveguide single mode laser, heterodyne detection and chirp pulse compression. A theoretical model of the system is given: overall performance, angular, range and Doppler precisions are estimated, as well as the influence of heterodyne mixing, speckle, atmospheric turbulence and optical aberrations. An evaluation of several scanning devices is also given, that compares their performance as far as Doppler precision is concerned. Parametric optimization of this imaging system has 1ed to a total field of view of 0,5° x 1° (corresponding to 64 x 128 points). The 3 images Range-Doppler Velocity and Reflectivity are generated at a repetition rate of about 1,5 Hz. Field tests and experimental results confirm the theoretical investigations and help compare the relative interests of these new images in a wide range of applications
Ait, Fares Wassima. "Détection et suivi d'objets par vision fondés sur segmentation par contour actif basé région." Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00932263.
Повний текст джерелаAit, Fares Wassima. "Détection et suivi d'objets par vision fondés sur segmentation par contour actif base région." Toulouse 3, 2013. http://thesesups.ups-tlse.fr/2143/.
Повний текст джерелаObject segmentation and tracking is a challenging area of ongoing research in computer vision. One important application lies in robotics where the ability to accurately segment an object of interest from its background is crucial and particularly on images acquired onboard during robot motion. Object segmentation technique consists in separating the object region from the image background according to a pre-defined criterion. Object tracking is a process of determining the positions of moving objects in image sequences. Several techniques can be applied to ensure these operations. In this thesis, we are interested to segment and track objects in video sequences using active contour method due to its robustness and efficiency to segment and track non-rigid objects. Active contour method consists in making a curve converge from an initial position around the object to be detected towards this object boundary according to a pre-defined criterion. We employ criteria which depend on the image regions what may impose certain constraints on the characteristics of these regions as a homogeneity assumption. This assumption may not always be verified due to the heterogeneity often present in images. In order to cope with the heterogeneity that may appear either in the object of interest or in the image background in noisy images using an inadequate active contour initialization, we propose a technique that combines local and global statistics in order to compute the segmentation criterion. By using a radius with a fixed size, a half-disk is superposed on each point of the active contour to define the local extraction regions. However, when the heterogeneity appears on both the object of interest and the image background, we develop a new technique based on a flexible radius that defines two half-disks with two different radius values to extract the local information. The choice of the value of these two radii is determined by taking into consideration the object size as well as the distance separating the object of interest from its neighbors. Finally, to track a mobile object within a video sequence using the active contour method, we develop a hybrid object tracking approach based on region characteristics and on motion vector of interest points extracted on the object region. Using our approach, the initial active contour for each image will be adequately adjusted in a way that it will be as close as possible to the actual boundary of the object of interest so that the evolution of active contour based on characteristics of the region will not be trapped by false contours. Simulation results on synthetic and real images validate the effectiveness of the proposed approaches
Cámara, Chávez Guillermo. "Analyse du contenu vidéo par apprentissage actif." Cergy-Pontoise, 2007. http://www.theses.fr/2007CERG0380.
Повний текст джерелаThis thesis presents work towards a unified framework for semi-automated video indexing and interactive retrieval. To create an efficient index, a set of representative key frames are selected from the entire video content. We developed an automatic shot boundary detection algorithm to get rid of parameters and thresholds. We adopted a SVM classifier due to its ability to use very high dimensional feature spaces while at the same time keeping strong generalization guarantees from few training examples. We deeply evaluated the combination of features and kernels and present interesting results obtained, for shot extraction TRECVID 2006 Task. We then propose an interactive video retrieval system: RETINVID, to significantly reduce the number of key frames annotated by the user. The key frames are selected based on their ability to increase the knowledge of the data. We perform an experiment against the 2005 TRECVID benchmark for high-level task
García-Gutiérrez, Luis Antonio. "Développement d'un contrôle actif tolérant aux défaillances appliqué aux systèmes PV." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30071.
Повний текст джерелаThis work contributes by developing an active fault tolerant control (AFTC) for Photovoltaic (PV) systems. The fault detection and diagnosis (FDD) methodology is based on the analysis of a model that compares real-time measurement. We use a high granularity PV array model in the FDD tool to allow faults to be detected in complex conditions. Firstly, the research focuses on fault detection in complex shadow conditions. A real-time approach is presented to emulate the electrical characteristics of PV modules under complex shadow conditions. Using a precise emulators approach is a real challenge to study the high non-linearity and the complexity of PV systems in partial shading. The real-time emulation was validated with simple experimental results under failure conditions to design specific fault-detection algorithms in a first sample. The second part of the research addresses the FDD method for DC/DC and DC/AC power converters that are connected to the grid. Primary results allowed us to validate the system's recovery for normal operating points after a fault with this complete AFTC approach. Emulations based on the simulation of distributed power converters, fault detection methodologies based on a model, and a hybrid diagnostician were then presented
Motchon, Koffi Mawussé Djidula. "Caractérisation de la discernabilité des systèmes dynamiques linéaires et non-linéaires affines en la commande." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10027/document.
Повний текст джерелаThe distinguishability of the input-output behavior of two dynamical systems plays a crucialrole in many applications such as control and observation of hybrid dynamical systems. Thisthesis aims to characterize this property of distinguishability. For linear systems and nonlinearcontrol-affine systems, we establish: conditions for strict distinguishability that ensure thedistinguishability of the systems for every control input jointly applied to them; conditions forcontrolled-distinguishability that guarantee the existence of a control input which makes distinguishable the outputs of the systems; conditions for residual-distinguishability that characterize the distinguishability of the modes through parity-space residuals. Moreover, in the linear case, a metric is specified in order to quantify for a given control input, the distinguishability degreeof the systems and the robustness of the property of distinguishability