RÉSUMÉ Nous décrivons dans cet article l’utilisation d’algorithmes d’inférence grammaticale pour la tâche de chunking, pour ensuite les comparer et les combiner avec des CRF (Conditional Random Fields), à l’efficacité éprouvée pour cette tâche. Notre corpus est extrait du French TreeBank. Nous proposons et évaluons deux manières différentes de combiner modèle symbolique et modèle statistique ap...

Automatic events extraction by combining multiple approaches In this paper, we present an automatic system for extracting events based on the combination of two existing information extraction approaches : the first one is made of hand-crafted linguistic rules and the second one is based on an automatic learning of linguistic patterns. We have shown that this mixed approach leads to a significa...

Let ẋ = f(x, u) be a general control system; the existence of a smooth control-Lyapunov function does not imply the existence of a continuous stabilizing feedback. However, we show that it allows us to design a stabilizing feedback in the Krasovskii (or Filippov) sense. Moreover, we recall a definition of a control-Lyapunov function in the case of a nonsmooth function; it is based on Clarke’s g...