Estimation robuste des modèles de mélange sur des données distribuées

Abstract : This work proposes a contribution aiming at probabilistic model estimation, in the setting of dis- tributed, decentralized, data-sharing computer systems. Such systems are developing over the in- ternet, and also exist as sensor networks, for instance. Our general goal consists in estimating a probability distribution over a data set which is distributed into subsets located on the nodes of a distributed system. More precisely, we are at estimating the global distribution by aggregating local distributions, estimated on these local subsets. Our proposal exploits the following assumption: all distributions are modelled as a Gaussian mixture. Our contribution is a solution that is both decen- tralized and statistically robust to outlier local Gaussian mixture models. The proposed process only requires mixture parameters, rather than original data.
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Submitted on : Saturday, October 27, 2012 - 12:12:35 PM
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Ali El Attar. Estimation robuste des modèles de mélange sur des données distribuées. Apprentissage [cs.LG]. Université de Nantes, 2012. Français. ⟨tel-00746118⟩

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