Letteratura scientifica selezionata sul tema "Apprentissage profond des représentations"
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Articoli di riviste sul tema "Apprentissage profond des représentations":
Narcy, Jean-Paul. "Représentations, apprentissage et supports multimédias". Recherche et pratiques pédagogiques en langues de spécialité - Cahiers de l'APLIUT 17, n. 3 (1998): 14–24. http://dx.doi.org/10.3406/apliu.1998.1154.
Tremblay, Marc-Adélard. "L'anthropologie de la santé en tant que représentation". Articles - Le quotidien 23, n. 3 (12 aprile 2005): 253–73. http://dx.doi.org/10.7202/055985ar.
Lieury, Alain, Catherine Clinet, Marc Gimonet e Muriel Lefebre. "Représentations imagées et apprentissage d'un vocabulaire étranger". Bulletin de psychologie 41, n. 386 (1988): 701–9. http://dx.doi.org/10.3406/bupsy.1988.12928.
Milovanovic, Julie, Daniel Siret, Guillaume Moreau e Francis Miguet. "Écosystème de représentations et apprentissage de la conception". SHS Web of Conferences 47 (2018): 01003. http://dx.doi.org/10.1051/shsconf/20184701003.
Sánchez Abchi, Verónica, e Amelia Lambelet. "Enseignement/apprentissage des langues et cultures d’origine: changements, synergies et représentations". Babylonia Journal of Language Education 1 (25 aprile 2023): 8–11. http://dx.doi.org/10.55393/babylonia.v1i.277.
Auger, Nathalie. "L’enseignement-apprentissage de la langue française en France. Dé-complexifier la question". Diversité 151, n. 1 (2007): 121–26. http://dx.doi.org/10.3406/diver.2007.2835.
Fotso Kono, Hervé, e José Ángel Vera Noriega. "Propriétés psychométriques d’un instrument de mesure des représentations des approches grammaticales inductives/déductives des enseignants de FLE au Mexique". Verbum et Lingua, n. 20 (30 giugno 2022): 7–24. http://dx.doi.org/10.32870/vel.vi20.181.
Fillières-Riveau, Gauthier, Jean-Marie Favreau, Vincent Barra e Guillaume Touya. "Génération de cartes tactiles photoréalistes pour personnes déficientes visuelles par apprentissage profond". Revue Internationale de Géomatique 30, n. 1-2 (gennaio 2020): 105–26. http://dx.doi.org/10.3166/rig.2020.00104.
Pouliquen, Geoffroy, e Catherine Oppenheim. "Débruitage par apprentissage profond: impact sur les biomarqueurs quantitatifs des tumeurs cérébrales". Journal of Neuroradiology 49, n. 2 (marzo 2022): 136. http://dx.doi.org/10.1016/j.neurad.2022.01.040.
Narcy-Combes, Marie-Françoise. "Conflits de représentations et adaptation des dispositifs d’enseignement/apprentissage". Recherche et pratiques pédagogiques en langues de spécialité - Cahiers de l APLIUT, Vol. XXVII N° 1 (15 febbraio 2008): 32–50. http://dx.doi.org/10.4000/apliut.1525.
Tesi sul tema "Apprentissage profond des représentations":
Moradi, Fard Maziar. "Apprentissage de représentations de données dans un apprentissage non-supervisé". Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALM053.
Due to the great impact of deep learning on variety fields of machine learning, recently their abilities to improve clustering approaches have been investi- gated. At first, deep learning approaches (mostly Autoencoders) have been used to reduce the dimensionality of the original space and to remove possible noises (also to learn new data representations). Such clustering approaches that utilize deep learning approaches are called Deep Clustering. This thesis focuses on developing Deep Clustering models which can be used for different types of data (e.g., images, text). First we propose a Deep k-means (DKM) algorithm where learning data representations (through a deep Autoencoder) and cluster representatives (through the k-means) are performed in a joint way. The results of our DKM approach indicate that this framework is able to outperform similar algorithms in Deep Clustering. Indeed, our proposed framework is able to truly and smoothly backpropagate the loss function error through all learnable variables.Moreover, we propose two frameworks named SD2C and PCD2C which are able to integrate respectively seed words and pairwise constraints into end-to-end Deep Clustering frameworks. In fact, by utilizing such frameworks, the users can observe the reflection of their needs in clustering. Finally, the results obtained from these frameworks indicate their ability to obtain more tailored results
Tamaazousti, Youssef. "Vers l’universalité des représentations visuelle et multimodales". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC038/document.
Because of its key societal, economic and cultural stakes, Artificial Intelligence (AI) is a hot topic. One of its main goal, is to develop systems that facilitates the daily life of humans, with applications such as household robots, industrial robots, autonomous vehicle and much more. The rise of AI is highly due to the emergence of tools based on deep neural-networks which make it possible to simultaneously learn, the representation of the data (which were traditionally hand-crafted), and the task to solve (traditionally learned with statistical models). This resulted from the conjunction of theoretical advances, the growing computational capacity as well as the availability of many annotated data. A long standing goal of AI is to design machines inspired humans, capable of perceiving the world, interacting with humans, in an evolutionary way. We categorize, in this Thesis, the works around AI, in the two following learning-approaches: (i) Specialization: learn representations from few specific tasks with the goal to be able to carry out very specific tasks (specialized in a certain field) with a very good level of performance; (ii) Universality: learn representations from several general tasks with the goal to perform as many tasks as possible in different contexts. While specialization was extensively explored by the deep-learning community, only a few implicit attempts were made towards universality. Thus, the goal of this Thesis is to explicitly address the problem of improving universality with deep-learning methods, for image and text data. We have addressed this topic of universality in two different forms: through the implementation of methods to improve universality (“universalizing methods”); and through the establishment of a protocol to quantify its universality. Concerning universalizing methods, we proposed three technical contributions: (i) in a context of large semantic representations, we proposed a method to reduce redundancy between the detectors through, an adaptive thresholding and the relations between concepts; (ii) in the context of neural-network representations, we proposed an approach that increases the number of detectors without increasing the amount of annotated data; (iii) in a context of multimodal representations, we proposed a method to preserve the semantics of unimodal representations in multimodal ones. Regarding the quantification of universality, we proposed to evaluate universalizing methods in a Transferlearning scheme. Indeed, this technical scheme is relevant to assess the universal ability of representations. This also led us to propose a new framework as well as new quantitative evaluation criteria for universalizing methods
Droniou, Alain. "Apprentissage de représentations et robotique développementale : quelques apports de l'apprentissage profond pour la robotique autonome". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066056/document.
This thesis studies the use of deep neural networks to learn high level representations from raw inputs on robots, based on the "manifold hypothesis"
Moreau, Thomas. "Représentations Convolutives Parcimonieuses -- application aux signaux physiologiques et interpétabilité de l'apprentissage profond". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN054/document.
Convolutional representations extract recurrent patterns which lead to the discovery of local structures in a set of signals. They are well suited to analyze physiological signals which requires interpretable representations in order to understand the relevant information. Moreover, these representations can be linked to deep learning models, as a way to bring interpretability intheir internal representations. In this disserta tion, we describe recent advances on both computational and theoretical aspects of these models.First, we show that the Singular Spectrum Analysis can be used to compute convolutional representations. This representation is dense and we describe an automatized procedure to improve its interpretability. Also, we propose an asynchronous algorithm, called DICOD, based on greedy coordinate descent, to solve convolutional sparse coding for long signals. Our algorithm has super-linear acceleration.In a second part, we focus on the link between representations and neural networks. An extra training step for deep learning, called post-training, is introduced to boost the performances of the trained network by making sure the last layer is optimal. Then, we study the mechanisms which allow to accelerate sparse coding algorithms with neural networks. We show that it is linked to afactorization of the Gram matrix of the dictionary.Finally, we illustrate the relevance of convolutional representations for physiological signals. Convolutional dictionary learning is used to summarize human walk signals and Singular Spectrum Analysis is used to remove the gaze movement in young infant’s oculometric recordings
Droniou, Alain. "Apprentissage de représentations et robotique développementale : quelques apports de l'apprentissage profond pour la robotique autonome". Electronic Thesis or Diss., Paris 6, 2015. http://www.theses.fr/2015PA066056.
This thesis studies the use of deep neural networks to learn high level representations from raw inputs on robots, based on the "manifold hypothesis"
Caron, Stéphane. "Détection d'anomalies basée sur les représentations latentes d'un autoencodeur variationnel". Master's thesis, Université Laval, 2021. http://hdl.handle.net/20.500.11794/69185.
In this master's thesis, we propose a methodology that aims to detect anomalies among complex data, such as images. In order to do that, we use a specific type of neural network called the varitionnal autoencoder (VAE). This non-supervised deep learning approach allows us to obtain a simple representation of our data on which we then use the Kullback-Leibler distance to discriminate between anomalies and "normal" observations. To determine if an image should be considered "abnormal", our approach is based on a proportion of observations to be filtered, which is easier and more intuitive to establish than applying a threshold based on the value of a distance metric. By using our methodology on real complex images, we can obtain superior anomaly detection performances in terms of area under the ROC curve (AUC),precision and recall compared to other non-supervised methods. Moreover, we demonstrate that the simplicity of our filtration level allows us to easily adapt the method to datasets having different levels of anomaly contamination.
Thomas, Hugues. "Apprentissage de nouvelles représentations pour la sémantisation de nuages de points 3D". Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM048/document.
In the recent years, new technologies have allowed the acquisition of large and precise 3D scenes as point clouds. They have opened up new applications like self-driving vehicles or infrastructure monitoring that rely on efficient large scale point cloud processing. Convolutional deep learning methods cannot be directly used with point clouds. In the case of images, convolutional filters brought the ability to learn new representations, which were previously hand-crafted in older computer vision methods. Following the same line of thought, we present in this thesis a study of hand-crafted representations previously used for point cloud processing. We propose several contributions, to serve as basis for the design of a new convolutional representation for point cloud processing. They include a new definition of multiscale radius neighborhood, a comparison with multiscale k-nearest neighbors, a new active learning strategy, the semantic segmentation of large scale point clouds, and a study of the influence of density in multiscale representations. Following these contributions, we introduce the Kernel Point Convolution (KPConv), which uses radius neighborhoods and a set of kernel points to play the role of the kernel pixels in image convolution. Our convolutional networks outperform state-of-the-art semantic segmentation approaches in almost any situation. In addition to these strong results, we designed KPConv with a great flexibility and a deformable version. To conclude our argumentation, we propose several insights on the representations that our method is able to learn
Mazari, Ahmed. "Apprentissage profond pour la reconnaissance d’actions en vidéos". Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS171.
Nowadays, video contents are ubiquitous through the popular use of internet and smartphones, as well as social media. Many daily life applications such as video surveillance and video captioning, as well as scene understanding require sophisticated technologies to process video data. It becomes of crucial importance to develop automatic means to analyze and to interpret the large amount of available video data. In this thesis, we are interested in video action recognition, i.e. the problem of assigning action categories to sequences of videos. This can be seen as a key ingredient to build the next generation of vision systems. It is tackled with AI frameworks, mainly with ML and Deep ConvNets. Current ConvNets are increasingly deeper, data-hungrier and this makes their success tributary of the abundance of labeled training data. ConvNets also rely on (max or average) pooling which reduces dimensionality of output layers (and hence attenuates their sensitivity to the availability of labeled data); however, this process may dilute the information of upstream convolutional layers and thereby affect the discrimination power of the trained video representations, especially when the learned action categories are fine-grained
Franceschi, Jean-Yves. "Apprentissage de représentations et modèles génératifs profonds dans les systèmes dynamiques". Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS014.
The recent rise of deep learning has been motivated by numerous scientific breakthroughs, particularly regarding representation learning and generative modeling. However, most of these achievements have been obtained on image or text data, whose evolution through time remains challenging for existing methods. Given their importance for autonomous systems to adapt in a constantly evolving environment, these challenges have been actively investigated in a growing body of work. In this thesis, we follow this line of work and study several aspects of temporality and dynamical systems in deep unsupervised representation learning and generative modeling. Firstly, we present a general-purpose deep unsupervised representation learning method for time series tackling scalability and adaptivity issues arising in practical applications. We then further study in a second part representation learning for sequences by focusing on structured and stochastic spatiotemporal data: videos and physical phenomena. We show in this context that performant temporal generative prediction models help to uncover meaningful and disentangled representations, and conversely. We highlight to this end the crucial role of differential equations in the modeling and embedding of these natural sequences within sequential generative models. Finally, we more broadly analyze in a third part a popular class of generative models, generative adversarial networks, under the scope of dynamical systems. We study the evolution of the involved neural networks with respect to their training time by describing it with a differential equation, allowing us to gain a novel understanding of this generative model
Francis, Danny. "Représentations sémantiques d'images et de vidéos". Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS605.
Recent research in Deep Learning has sent the quality of results in multimedia tasks rocketing: thanks to new big datasets of annotated images and videos, Deep Neural Networks (DNN) have outperformed other models in most cases. In this thesis, we aim at developing DNN models for automatically deriving semantic representations of images and videos. In particular we focus on two main tasks : vision-text matching and image/video automatic captioning. Addressing the matching task can be done by comparing visual objects and texts in a visual space, a textual space or a multimodal space. Based on recent works on capsule networks, we define two novel models to address the vision-text matching problem: Recurrent Capsule Networks and Gated Recurrent Capsules. In image and video captioning, we have to tackle a challenging task where a visual object has to be analyzed, and translated into a textual description in natural language. For that purpose, we propose two novel curriculum learning methods. Moreover regarding video captioning, analyzing videos requires not only to parse still images, but also to draw correspondences through time. We propose a novel Learned Spatio-Temporal Adaptive Pooling method for video captioning that combines spatial and temporal analysis. Extensive experiments on standard datasets assess the interest of our models and methods with respect to existing works
Libri sul tema "Apprentissage profond des représentations":
Les représentations des langues et de leur apprentissage: Références, modèles, données et méthodes. Paris: Didier, 2001.
de Diesbach-Dolder, Stéphanie. Apprentissage scolaire : lorsque les émotions s’invitent en classe… Une analyse socioculturelle des pratiques d’enseignement en éducation interculturelle. Éditions Alphil-Presses universitaires suisses, 2022. http://dx.doi.org/10.33055/alphil.03189.
Hodieb, Liliane, a cura di. Plurilinguisme et tensions identitaires. Editions des archives contemporaines, 2021. http://dx.doi.org/10.17184/eac.9782813003614.
Capitoli di libri sul tema "Apprentissage profond des représentations":
FLEURY SOARES, Gustavo, e Induraj PUDHUPATTU RAMAMURTHY. "Comparaison de modèles d’apprentissage automatique et d’apprentissage profond". In Optimisation et apprentissage, 153–71. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9071.ch6.
JACQUEMONT, Mikaël, Thomas VUILLAUME, Alexandre BENOIT, Gilles MAURIN e Patrick LAMBERT. "Analyse d’images Cherenkov monotélescope par apprentissage profond". In Inversion et assimilation de données de télédétection, 303–35. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9142.ch9.
ATIEH, Mirna, Omar MOHAMMAD, Ali SABRA e Nehme RMAYTI. "IdO, apprentissage profond et cybersécurité dans la maison connectée : une étude". In Cybersécurité des maisons intelligentes, 215–56. ISTE Group, 2024. http://dx.doi.org/10.51926/iste.9086.ch6.
Guemkam Ouafo, Diane Armelle. "Multilinguisme camerounais, traitement computationnel et développement". In Multilinguisme, multiculturalisme et représentations identitaires, 303–12. Observatoire européen du plurilinguisme, 2021. http://dx.doi.org/10.3917/oep.goron.2021.01.0303.
RAMANDIMBISOA, Farah-Sandy. "Langues et représentations linguistiques des étudiants issus de milieux défavorisés. Le cas du programme SÉSAME à Madagascar". In Langue(s) en mondialisation, 77–84. Editions des archives contemporaines, 2022. http://dx.doi.org/10.17184/eac.5291.
Atangana, Marie Renée. "Apport du numérique dans la dynamisation et l’opérationnalisation des langues nationales au Cameroun". In Multilinguisme, multiculturalisme et représentations identitaires, 313–31. Observatoire européen du plurilinguisme, 2021. http://dx.doi.org/10.3917/oep.goron.2021.01.0313.
Guehi, José-Gisèle, Marie Christelle Kouame e Anani Michael Kouabenan. "Et si le français ivoirien devient medium d’enseignement-apprentissage au primaire ? Représentations des enseignants et parents d’élèves". In Les parlers urbains africains au prisme du plurilinguisme : description sociolinguistique, 215–30. Observatoire européen du plurilinguisme, 2020. http://dx.doi.org/10.3917/oep.kosso.2020.01.0215.
Chevalier, Laurence. "Les facteurs à l’oeuvre dans le maintien de l’enseignement traditionnel de la grammaire au Japon". In Le Japon, acteur de la Francophonie, 27–40. Editions des archives contemporaines, 2016. http://dx.doi.org/10.17184/eac.5524.
Khadraoui, Errime, e Riad Messaour. "Apprentissage du FLE en Algérie : de l’analyse des représentations à la motivation des apprenants dans le milieu universitaire". In Para lá da tarefa: implicar os estudantes na aprendizagem de línguas estrangeiras no ensino superior, 208–25. Faculdade de Letras da Universidade do Porto, 2019. http://dx.doi.org/10.21747/9789898969217/paraa11.
Houda, Melaouhia Ben Hamad. "Pratiques et représentations du français chez les étudiants tunisiens en classe de langue". In Écoles, langues et cultures d’enseignement en contexte plurilingue africain, 267–81. Observatoire européen du plurilinguisme, 2018. http://dx.doi.org/10.3917/oep.agbef.2018.01.0267.
Atti di convegni sul tema "Apprentissage profond des représentations":
Fourcade, A. "Apprentissage profond : un troisième oeil pour les praticiens". In 66ème Congrès de la SFCO. Les Ulis, France: EDP Sciences, 2020. http://dx.doi.org/10.1051/sfco/20206601014.