Search Results for author: Robert B. Gramacy

Found 12 papers, 3 papers with code

Voronoi Candidates for Bayesian Optimization

1 code implementation7 Feb 2024 Nathan Wycoff, John W. Smith, Annie S. Booth, Robert B. Gramacy

Bayesian optimization (BO) offers an elegant approach for efficiently optimizing black-box functions.

Bayesian Optimization Gaussian Processes

Robust expected improvement for Bayesian optimization

no code implementations16 Feb 2023 Ryan B. Christianson, Robert B. Gramacy

Bayesian Optimization (BO) links Gaussian Process (GP) surrogates with sequential design toward optimizing expensive-to-evaluate black-box functions.

Active Learning Bayesian Optimization

Triangulation candidates for Bayesian optimization

1 code implementation14 Dec 2021 Robert B. Gramacy, Annie Sauer, Nathan Wycoff

Bayesian optimization involves "inner optimization" over a new-data acquisition criterion which is non-convex/highly multi-modal, may be non-differentiable, or may otherwise thwart local numerical optimizers.

Bayesian Optimization

Entropy-based adaptive design for contour finding and estimating reliability

no code implementations24 May 2021 D. Austin Cole, Robert B. Gramacy, James E. Warner, Geoffrey F. Bomarito, Patrick E. Leser, William P. Leser

In reliability analysis, methods used to estimate failure probability are often limited by the costs associated with model evaluations.

Sensitivity Prewarping for Local Surrogate Modeling

no code implementations15 Jan 2021 Nathan Wycoff, Mickaël Binois, Robert B. Gramacy

In the continual effort to improve product quality and decrease operations costs, computational modeling is increasingly being deployed to determine feasibility of product designs or configurations.

Active Learning for Deep Gaussian Process Surrogates

1 code implementation15 Dec 2020 Annie Sauer, Robert B. Gramacy, David Higdon

Deep Gaussian processes (DGPs) are increasingly popular as predictive models in machine learning (ML) for their non-stationary flexibility and ability to cope with abrupt regime changes in training data.

Active Learning Gaussian Processes +1

Locally induced Gaussian processes for large-scale simulation experiments

no code implementations28 Aug 2020 D. Austin Cole, Ryan Christianson, Robert B. Gramacy

A cascade of strategies for planning the selection of local inducing points is provided, and comparisons are drawn to related methodology with emphasis on computer surrogate modeling applications.

Computational Efficiency Gaussian Processes

Bayesian optimization under mixed constraints with a slack-variable augmented Lagrangian

no code implementations NeurIPS 2016 Victor Picheny, Robert B. Gramacy, Stefan M. Wild, Sebastien Le Digabel

An augmented Lagrangian (AL) can convert a constrained optimization problem into a sequence of simpler (e. g., unconstrained) problems, which are then usually solved with local solvers.

Bayesian Optimization

Gaussian Process Structural Equation Models with Latent Variables

no code implementations9 Aug 2014 Ricardo Silva, Robert B. Gramacy

In a variety of disciplines such as social sciences, psychology, medicine and economics, the recorded data are considered to be noisy measurements of latent variables connected by some causal structure.

Sequential Design for Optimal Stopping Problems

no code implementations16 Sep 2013 Robert B. Gramacy, Mike Ludkovski

We propose a new approach to solve optimal stopping problems via simulation.

Active Learning

Local Gaussian process approximation for large computer experiments

no code implementations2 Mar 2013 Robert B. Gramacy, Daniel W. Apley

We provide a new approach to approximate emulation of large computer experiments.

Methodology Computation

Bayesian treed Gaussian process models with an application to computer modeling

no code implementations24 Oct 2007 Robert B. Gramacy, Herbert K. H. Lee

Motivated by a computer experiment for the design of a rocket booster, this paper explores nonstationary modeling methodologies that couple stationary Gaussian processes with treed partitioning.

Methodology Applications Computation

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