Search Results for author: Emmanuel Vazquez

Found 10 papers, 1 papers with code

Bayesian sequential design of computer experiments for quantile set inversion

no code implementations2 Nov 2022 Romain Ait Abdelmalek-Lomenech, Julien Bect, Vincent Chabridon, Emmanuel Vazquez

We consider an unknown multivariate function representing a system-such as a complex numerical simulator-taking both deterministic and uncertain inputs.

Bayesian multi-objective optimization for stochastic simulators: an extension of the Pareto Active Learning method

no code implementations8 Jul 2022 Bruno Barracosa, Julien Bect, Héloïse Dutrieux Baraffe, Juliette Morin, Josselin Fournel, Emmanuel Vazquez

This article focuses on the multi-objective optimization of stochastic simulators with high output variance, where the input space is finite and the objective functions are expensive to evaluate.

Active Learning Bayesian Optimization

Relaxed Gaussian process interpolation: a goal-oriented approach to Bayesian optimization

no code implementations7 Jun 2022 Sébastien J Petit, Julien Bect, Emmanuel Vazquez

This work presents a new procedure for obtaining predictive distributions in the context of Gaussian process (GP) modeling, with a relaxation of the interpolation constraints outside some ranges of interest: the mean of the predictive distributions no longer necessarily interpolates the observed values when they are outside ranges of interest, but are simply constrained to remain outside.

Bayesian Optimization

Parameter selection in Gaussian process interpolation: an empirical study of selection criteria

no code implementations13 Jul 2021 Sébastien Petit, Julien Bect, Paul Feliot, Emmanuel Vazquez

This article revisits the fundamental problem of parameter selection for Gaussian process interpolation.

Numerical issues in maximum likelihood parameter estimation for Gaussian process interpolation

1 code implementation24 Jan 2021 Subhasish Basak, Sébastien Petit, Julien Bect, Emmanuel Vazquez

This article investigates the origin of numerical issues in maximum likelihood parameter estimation for Gaussian process (GP) interpolation and investigates simple but effective strategies for improving commonly used open-source software implementations.

Bayesian Optimization GPR

Sequential design of multi-fidelity computer experiments: maximizing the rate of stepwise uncertainty reduction

no code implementations27 Jul 2020 Rémi Stroh, Julien Bect, Séverine Demeyer, Nicolas Fischer, Damien Marquis, Emmanuel Vazquez

This article deals with the sequential design of experiments for (deterministic or stochastic) multi-fidelity numerical simulators, that is, simulators that offer control over the accuracy of simulation of the physical phenomenon or system under study.

Sequential design of experiments to estimate a probability of exceeding a threshold in a multi-fidelity stochastic simulator

no code implementations26 Jul 2017 Rémi Stroh, Séverine Demeyer, Nicolas Fischer, Julien Bect, Emmanuel Vazquez

We consider a Bayesian estimator of the probability, together with an associated measure of uncertainty, and propose a new multi-fidelity sequential design strategy, called Maximum Speed of Uncertainty Reduction (MSUR), to select the value of physical inputs and the fidelity level of new simulations.

A Bayesian approach to constrained single- and multi-objective optimization

no code implementations2 Oct 2015 Paul Feliot, Julien Bect, Emmanuel Vazquez

More specifically, an extended domination rule is used to handle objectives and constraints in a unified way, and a corresponding expected hyper-volume improvement sampling criterion is proposed.

A new integral loss function for Bayesian optimization

no code implementations20 Aug 2014 Emmanuel Vazquez, Julien Bect

In the special case of a one-step Bayes-optimal strategy, it leads to the classical Expected Improvement (EI) sampling criterion.

Bayesian Optimization

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