Search Results for author: Victor Gabillon

Found 10 papers, 0 papers with code

Derivative-Free & Order-Robust Optimisation

no code implementations9 Oct 2019 Victor Gabillon, Rasul Tutunov, Michal Valko, Haitham Bou Ammar

In this paper, we formalise order-robust optimisation as an instance of online learning minimising simple regret, and propose Vroom, a zero'th order optimisation algorithm capable of achieving vanishing regret in non-stationary environments, while recovering favorable rates under stochastic reward-generating processes.

MANAS: Multi-Agent Neural Architecture Search

no code implementations3 Sep 2019 Vasco Lopes, Fabio Maria Carlucci, Pedro M Esperança, Marco Singh, Victor Gabillon, Antoine Yang, Hang Xu, Zewei Chen, Jun Wang

The Neural Architecture Search (NAS) problem is typically formulated as a graph search problem where the goal is to learn the optimal operations over edges in order to maximise a graph-level global objective.

Neural Architecture Search

A simple parameter-free and adaptive approach to optimization under a minimal local smoothness assumption

no code implementations1 Oct 2018 Peter L. Bartlett, Victor Gabillon, Michal Valko

The difficulty of optimization is measured in terms of 1) the amount of \emph{noise} $b$ of the function evaluation and 2) the local smoothness, $d$, of the function.

Hit-and-Run for Sampling and Planning in Non-Convex Spaces

no code implementations19 Oct 2016 Yasin Abbasi-Yadkori, Peter L. Bartlett, Victor Gabillon, Alan Malek

We propose the Hit-and-Run algorithm for planning and sampling problems in non-convex spaces.

Approximate Dynamic Programming Finally Performs Well in the Game of Tetris

no code implementations NeurIPS 2013 Victor Gabillon, Mohammad Ghavamzadeh, Bruno Scherrer

A close look at the literature of this game shows that while ADP algorithms, that have been (almost) entirely based on approximating the value function (value function based), have performed poorly in Tetris, the methods that search directly in the space of policies by learning the policy parameters using an optimization black box, such as the cross entropy (CE) method, have achieved the best reported results.

Adaptive Submodular Maximization in Bandit Setting

no code implementations NeurIPS 2013 Victor Gabillon, Branislav Kveton, Zheng Wen, Brian Eriksson, S. Muthukrishnan

Maximization of submodular functions has wide applications in machine learning and artificial intelligence.

Approximate Modified Policy Iteration

no code implementations14 May 2012 Bruno Scherrer, Victor Gabillon, Mohammad Ghavamzadeh, Matthieu Geist

Modified policy iteration (MPI) is a dynamic programming (DP) algorithm that contains the two celebrated policy and value iteration methods.

General Classification

Multi-Bandit Best Arm Identification

no code implementations NeurIPS 2011 Victor Gabillon, Mohammad Ghavamzadeh, Alessandro Lazaric, Sébastien Bubeck

We first propose an algorithm called Gap-based Exploration (GapE) that focuses on the arms whose mean is close to the mean of the best arm in the same bandit (i. e., small gap).

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