RÉSUMÉ. Nous proposons un nouvel algorithme semi-supervisé qui combine un modèle de mélange gaussien pour modéliser localement les données, et un graphe génératif construit sur les composants du mélange pour capturer la structure globale des données. La combinaison est réalisée via un processus de propagation d’étiquettes au travers du graphe. Contrairement aux algorithmes de l’état de l’art, l...

The B and Pb isotope systems are widely applied tracers of recycling processes occurring during subduction. Studies examining these complementary systems as a pair enjoy considerable success, where B primarily records the thermal and fluid evolution of the subducting slab, whereas the tripartite Pb system constrains the source of subducted material returned to volcanic arcs. However, interpreta...

The dynamics of soil moisture and temperature states are forced by land surface fluxes that form the coupling between the soil and the atmosphere. This twoway interaction between the soil and the atmosphere results in feedback mechanisms that affect the temporal patterns of variability of the system. To understand these characteristics of soil moisture and temperature variability, a one-dimensi...

Les références principales pour l’interprétation du produit de mélange de deux séries en termes d’automates et les applications aux identités syntaxiques sont [Lo 2002] 1.3 et [J 1980]. Dans le cours du 14 mars les exemples suivant sont traités: 1. Mélange de deux éléments de K < X > 2. L’identité x∗0x(x1 · · ·xn) = x∗0x1x∗0x2 · · ·x∗0xnx∗0 3. L’identité (x0 + x1)∗ = x∗0xx∗1 4. L’identité (1 + ...

RÉSUMÉ. L’idée à l’origine du modèle de mélange conjoint (MMConjoint) est de classer simultanément deux ensembles d’observations en introduisant un a priori conjoint entre les deux classifications et un lien statistique entre les deux observations. Nous étudions en particulier le cas de mélanges gaussiens et le cas de mélanges paramétriques non gaussiens construits à partir de copules et de mar...

This paper presents a new approach to the problem of blind separation of independent components in the case of MA convolutive mixtures of MA processes. It consists of an extension of the well-known Fast-ICA algorithm developed by Hyvärinen and Oja for instantaneous mixtures. We introduce a new type of sphering (convolutive sphering) that allows the use of non-gaussianity criteria and associated...

We consider the mixing behaviour of the solutions of the continuity equation associated with a divergence-free velocity field. In this announcement we sketch two explicit examples of exponential decay of the mixing scale of the solution, in case of Sobolev velocity fields, thus showing the optimality of known lower bounds. We also describe how to use such examples to construct solutions to the ...

Genus Mentha is represented by 15 taxa in Turkey, most common being Mentha longifolia, M. suaveolens, M. pulegium and M. aquatica. All are perennial herbs, flowering in summer and reproducing with the help of seeds as well as vegetatively. These taxa are widely used by locals as condiment as well as for the preparation of mint tea aginst flue, lung and stomach disorders, whooping cough, and as ...