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Fast increased fidelity samplers for approximate Bayesian Gaussian process regression

Journal Article · · Journal of the Royal Statistical Society: Series B (Statistical Methodology)
DOI:https://doi.org/10.1111/rssb.12494· OSTI ID:1876804
 [1];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. US National Institutes of Health (NIH), Research Triangle Park, NC (United States).National Institute of Environmental Health Sciences
Gaussian processes (GPs) are common components in Bayesian non-parametric models having a rich methodological literature and strong theoretical grounding. The use of exact GPs in Bayesian models is limited to problems containing several thousand observations due to their prohibitive computational demands. We develop a posterior sampling algorithm using H-matrix approximations that scales at O(n log2 n). We show that this approximation’s Kullback-Leibler divergence to the true posterior can be made arbitrarily small. Though multidimensional GPs could be used with our algorithm, d-dimensional surfaces are modeled as tensor products of univariate GPs to minimize the cost of matrix construction and maximize computational efficiency. We illustrate the performance of this fast increased fidelity approximate GP, FIFA-GP, using both simulated and non-synthetic data sets
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Institute of Environmental Health Sciences (NIEHS); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001; FG02-97ER25308
OSTI ID:
1876804
Report Number(s):
LA-UR-21-23822
Journal Information:
Journal of the Royal Statistical Society: Series B (Statistical Methodology), Journal Name: Journal of the Royal Statistical Society: Series B (Statistical Methodology) Journal Issue: 4 Vol. 84; ISSN 1369-7412
Publisher:
Royal Statistical Society - WileyCopyright Statement
Country of Publication:
United States
Language:
English

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