Search Results for author: Rodolphe Le Riche

Found 11 papers, 2 papers with code

A comparison of mixed-variables Bayesian optimization approaches

no code implementations30 Oct 2021 Jhouben Cuesta-Ramirez, Rodolphe Le Riche, Olivier Roustant, Guillaume Perrin, Cedric Durantin, Alain Gliere

In this article, costly mixed problems are approached through Gaussian processes where the discrete variables are relaxed into continuous latent variables.

Bayesian Optimization Gaussian Processes

Revisiting Bayesian Optimization in the light of the COCO benchmark

1 code implementation30 Mar 2021 Rodolphe Le Riche, Victor Picheny

It is commonly believed that Bayesian optimization (BO) algorithms are highly efficient for optimizing numerically costly functions.

Bayesian Optimization

A sampling criterion for constrained Bayesian optimization with uncertainties

1 code implementation9 Mar 2021 Reda El Amri, Rodolphe Le Riche, Céline Helbert, Christophette Blanchet-Scalliet, Sébastien da Veiga

The main contribution of this work is an acquisition criterion that accounts for both the average improvement in objective function and the constraint reliability.

Bayesian Optimization

TREGO: a Trust-Region Framework for Efficient Global Optimization

no code implementations18 Jan 2021 Youssef Diouane, Victor Picheny, Rodolphe Le Riche, Alexandre Scotto Di Perrotolo

By following a classical scheme for the trust region (based on a sufficient decrease condition), the proposed algorithm enjoys global convergence properties, while departing from EGO only for a subset of optimization steps.

Bayesian Optimization

Global sensitivity analysis for optimization with variable selection

no code implementations12 Nov 2018 Adrien Spagnol, Rodolphe Le Riche, Sebastien Da Veiga

However it does not account for the specific structure of optimization problems where we would like to identify which variables most lead to constraints satisfaction and low values of the objective function.

Variable Selection

Budgeted Multi-Objective Optimization with a Focus on the Central Part of the Pareto Front -- Extended Version

no code implementations27 Sep 2018 David Gaudrie, Rodolphe Le Riche, Victor Picheny, Benoit Enaux, Vincent Herbert

When the number of experiments is severely restricted and/or when the number of objectives increases, uncovering the whole set of Pareto optimal solutions is out of reach, even for surrogate-based approaches: the proposed solutions are sub-optimal or do not cover the front well.

Small ensembles of kriging models for optimization

no code implementations8 Mar 2016 Hossein Mohammadi, Rodolphe Le Riche, Eric Touboul

The Efficient Global Optimization (EGO) algorithm uses a conditional Gaus-sian Process (GP) to approximate an objective function known at a finite number of observation points and sequentially adds new points which maximize the Expected Improvement criterion according to the GP.

An analytic comparison of regularization methods for Gaussian Processes

no code implementations2 Feb 2016 Hossein Mohammadi, Rodolphe Le Riche, Nicolas Durrande, Eric Touboul, Xavier Bay

A measure for data-model discrepancy is proposed which serves for choosing a regularization technique. In the second part of the paper, a distribution-wise GP is introduced that interpolates Gaussian distributions instead of data points.

Gaussian Processes

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