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Auteur: REZVANI ARANY, Roushan, Bratcu, Antoneta Iuliana
Résumé: This paper approaches the topic of robust control for DC-DC power converters. A low-power single-ended primary-inductor converter (SEPIC) has been chosen as a case study, for which the output voltage regulation problem in presence of parameter uncertainties is stated in the Hinf formalism as a disturbance-rejection problem. This approach is assessed by numerical simulations in MATLAB® against a classical integral state-feedback control from the point of view of robustness in stability and in ...
Auteur: Zanon Boito, Marcely, Bérard, Alexandre, Villavicencio, Aline, Besacier, Laurent
Résumé: Word discovery is the task of extracting words from un-segmented text. In this paper we examine to what extent neu-ral networks can be applied to this task in a realistic unwritten language scenario, where only small corpora and limited annotations are available. We investigate two scenarios: one with no supervision and another with limited supervision with access to the most frequent words. Obtained results show that it is possible to retrieve at least 27% of the gold standard vocabulary by ...
Auteur: Labussiere, Olivier
Résumé: La question d’ensemble qui sous-tend cette analyse porte sur la construction de politiques énergétiques contemporaines fondées sur l’exploitation de ressources diffuses (e.g. vent, soleil, gaz non-conventionnels) – c’est-a-dire qui n’ont pas été concentrées dans le temps à la différence des trois ressources énergétiques historiquement exploitées par nos sociétés (charbon, gaz naturel, pétrole). Le cas de l’exploration du gaz de charbon en région Lorraine est ici abordé comme un cas singulier de ...
Auteur: Nadaï, Alain, Labussiere, Olivier
Résumé: Our contribution aims at adding to the understanding of opposition to wind power. We follow the progressive emergence and structuring of a so-called “opponent” network to a highly conflictual wind power project (Seine-et-Marne, Parisian basin, France), paying particular attention to the shared landscape resources engaged in the development of this project.The paper draws on various strands of literature interested in landscape as a socio-material assemblage, a commons as a collective management ...
Auteur: Nadaï, Alain, Labussiere, Olivier
Résumé: Wind energy is commonly thought as part of renewable energies. “Renewable” points to the idea that wind, being a flow-energy, is not exhaustible. In economic terms, it is thought as non-rival: harnessing the energy of the wind does not deprive others from the possibility of doing so. A corollary to this view is the pregnant and reifying idea that wind speed defines the potential for wind power development and production. In this view, the physical geography of wind is the only geography that ...

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