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Ph.D de

Ph.D
Group : Learning and Optimization

Portfolio methods in uncertain contexts

Starts on 14/03/2013
Advisor : TEYTAUD, Olivier

Funding :
Affiliation : Université Paris-Sud
Laboratory : LRI-TAO

Defended on 11/12/2015, committee :
Directeurs de thèse :
M. Olivier Teytaud, INRIA Saclay
M. Marc Schoenauer, INRIA Saclay

Rapporteurs :
M. Bruno Bouzy, Université Paris Descartes

Examinateurs :
M. Philippe Dague, Université Paris-Saclay
M. Simon Lucas, University of Essex
M. Petr Posik, Gerstner Laboratory
M. Günter Rudolph, University of Dortmund

Research activities :

Abstract :
The energy investments are difficult because of uncertainties. Some uncertainties can be modeled by the probabilities. But there are difficult issues such as the evolution of technology and the penalization of CO2, which can not be presented by probabilities. Also, in the traditional optimization of energy systems, disappointingly, the noise is often badly treated by deterministic management. This thesis focuses on applying noisy optimization to energy systems. This thesis concentrates in studying methods to handle noise, including using of resampling methods to improve the convergence rates; applying portfolio methods to noisy optimization in the continuous domain; applying portfolio methods to the energy investments and games, including the use of adversarial bandit algorithms to calculate the Nash equilibrium of two-player zero-sum matrix game and the use of "sparsity" to accelerate the computation of Nash equilibrium.

Ph.D. dissertations & Faculty habilitations
APPRENTISSAGE ET OPTIMISATION SUR LES GRAPHES


ANALYSE DE DONNéES MULTI-MODALES POUR LES PATHOLOGIES COMPLEXES PAR LA CONCEPTION ET L’IMPLéMENTATION DE PROTOCOLES REPRODUCTIBLES ET RéUTILISABLES


DESIGNING INTERACTIVE TOOLS FOR CREATORS AND CREATIVE WORK
Creative work has been at the core of research in Human-Computer Interaction (HCI). I describe the results of a series of studies that look at how creators work, where creators include artists with years of professional practice, as well as learners, or novices and casual makers. My research focuses on three creation activities: drawing, physical modeling, and music composition. For these activities, I examine how artists switch between representations and how these representations evolve throughout their creative process, from early sketches to fine-grained forms or structured vocabularies. I present interactive systems that enrich their workflow (i) by extending their computer tools with physical user interfaces, or (ii) by making physical materials interactive. I also argue that sketch-based representations can allow for user interfaces that are more personal and less rigid. My presentation will reflect on lessons and limitations of this work and discuss challenges for future design-support tools.