2023


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Lundi 3 Juillet
Heure: 12:30 - 13:30
Lieu: Salle B107, bâtiment B, Université de Villetaneuse
Résumé: A family of contrast-pattern based classifiers for class-imbalance problems
Description: Raul Monroy In this talk, I will give an overview of a family of contrast-pattern based classification mechanisms, especially designed to deal with class-imbalance problems. In particular, I will go into the internal workings of three classifiers, namely: PBC4cip, MHLDT and FT4cip. I will highlight pros and cons, as well as giving an outline of some greatest hits.
Jeudi 21 Septembre
Heure: 10:30 - 11:30
Lieu: Salle C216, bâtiment C, Université de Villetaneuse
Résumé: Theoretical and Computational comparison of Perspective Formulations for Piecewise Convex Problems
Description: Claudia D’ambrosio Our study aims to generalize mathematical formulations for Piecewise Linear functions to Piecewise Convex functions, when they appears as part of mathematical optimization problems. In this seminar, we compare different formulations and show that their continuous relaxations are not equivalent when perspective reformulation is applied to strengthen the formulation of each single segment where the function is convex. Computational results on some classes of piecewise convex problems are presented