November 2022 – Laboratoire Informatique d’Avignon

Cornet Seminar – Olivier Bilenne – 18/11/2022

18 November 2022

In the context of team Cornet’s seminars, Olivier Bilenne (ENPC) will present his research work on Solutions of Poisson’s equation for first-policy improvement in parallel queueing systems, on November 18, 2022, at 11:35 in the meeting room. Abstract: This talk addresses the problem of (state-aware) job dispatching at minimum long-run average cost in a parallel queueing system with Poisson arrivals. Policy iteration is a technique for approaching optimality through improvement of an initial dispatching policy. Its implementation rests on the computation of value functions. In this context, we will consider the M/G/1-FCFS queue endowed with an arbitrary cost function for the waiting times of the incoming jobs. The associated relative value function is a solution of Poisson’s equation for Markov chains, which I propose to solve in the Laplace transform domain by considering an ancillary stochastic process extended to (imaginary) negative backlog states. This construction enables us to issue closed-form solutions for simple cost functions (polynomial, exponential, and their piecewise compositions), in turn permitting the derivation of interval bounds for the relative value functions to more general cost functions. Such bounds allow for an exact implementation of the first improvement step of policy iteration in a parallel queueing system.One objective Plus d'infos

PhD defense of Luis-Gil Moreno-Jiménez – 18 November 2022

18 November 2022

Date: 18th November at 2:00 pm. Location: Thesis room, Hanna Arendt Campus (City Center). The jury comprises: Abstract: In this thesis, we approach the study of creativity in general, with a particular interest in how it is created using artificial devices, and we present a more targeted and formal treatment of artificial literary text generation. In “The Creative Mind: Myths and Mechanisms” (Boden, 2004), Margaret Boden explains that the creative process is an intuitive path followed by humans to generate new artifacts appreciated for their novelty, societal significance, and beauty. She proposes a classification of creativity into three categories: — Combinatorial creativity, where known elements are merged to generate new elements; — Exploratory creativity, where generation occurs from observation or exploration; and — Transformational creativity, where generated elements result from modifications or experiments applied to objects produced by exploratory creativity. The quest for automated processes capable of creatively generating artifacts has recently given rise to a research domain called Computational Creativity, which offers intriguing prospects in various artistic domains such as visual arts, music, and literature. Although significant advancements have been made in this field, there exist difficulties and limits related to the inherent complexity in understanding the human creative Plus d'infos