hal-00641108, version 2
Fast parallel kriging-based stepwise uncertainty reduction with application to the identification of an excursion set
Clément Chevalier
1Julien Bect
2, 3David Ginsbourger
1Emmanuel Vazquez
2, 3Victor Picheny
4Yann Richet
5
(2011-11-14)
Abstract: Stepwise Uncertainty Reduction (SUR) strategies aim at constructing a sequence of sampling points for a function f : Rd → R, in such a way that the residual uncertainty about a quantity of interest becomes small. In the context of Gaussian Process-based approximation of computer experiments, these strategies have been shown to be particularly efficient for the problem of estimating the volume of excursion of a function f above a threshold. However, these strategies remain difficult to use in practice because of their high computational complexity, and they only deliver at each iteration a single point to evaluate. In this paper we introduce parallel sampling criteria, which allow selecting several sampling points simultaneously. Such criteria are of particular interest when the function f is expensive to evaluate and many CPUs are available. We also manage to drastically reduce the computational cost of these strategies using closed form expressions. We illustrate their performances in various numerical experiments, including a nuclear safety test case.
- 1: Institute of Mathematical Statistics and Actuarial Science
- University of Bern
- 2: GdR MASCOT-NUM ((Méthodes d'Analyse Stochastique des Codes et Traitements Numériques))
- CNRS : GDR3179
- 3: Supélec Sciences des Systèmes - EA4454 (E3S)
- SUPELEC
- 4: Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS)
- CERFACS
- 5: Institut de radioprotection et de sûreté nucléaire (IRSN)
- Ministère de l'écologie de l'Energie, du Développement durable et de l'Aménagement du territoire – Ministère de l'économie, de l'industrie et de l'emploi – Ministère de l'Enseignement Supérieur et de la Recherche Scientifique – Ministère de la Défense – Ministère de la santé
- Collaboration : GDR Mascot-Num, ReDICE Consortium
- Domain : Computer Science/Modeling and Simulation
Mathematics/Statistics
Statistics/Statistics Theory
Mathematics/Optimization and Control
Statistics/Other Statistics
Statistics/Machine Learning
Statistics/Computation
Statistics/Methodology - Keywords : Computer experiments – Gaussian processes – Sequential design – Probability of failure estimation – Active learning – Metamodel-based inversion
- Available versions : v1 (2011-11-15) v2 (2012-04-19)
- hal-00641108, version 2
- http://hal.archives-ouvertes.fr/hal-00641108
- oai:hal.archives-ouvertes.fr:hal-00641108
- From: David Ginsbourger
- Submitted on: Thursday, 19 April 2012 13:09:40
- Updated on: Thursday, 19 April 2012 13:41:45






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