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- W4302306014 abstract "Bayesian optimization (BO) is a popular method for efficiently inferring optima of an expensive black-box function via a sequence of queries. Existing information-theoretic BO procedures aim to make queries that most reduce the uncertainty about optima, where the uncertainty is captured by Shannon entropy. However, an optimal measure of uncertainty would, ideally, factor in how we intend to use the inferred quantity in some downstream procedure. In this paper, we instead consider a generalization of Shannon entropy from work in statistical decision theory (DeGroot 1962, Rao 1984), which contains a broad class of uncertainty measures parameterized by a problem-specific loss function corresponding to a downstream task. We first show that special cases of this entropy lead to popular acquisition functions used in BO procedures such as knowledge gradient, expected improvement, and entropy search. We then show how alternative choices for the loss yield a flexible family of acquisition functions that can be customized for use in novel optimization settings. Additionally, we develop gradient-based methods to efficiently optimize our proposed family of acquisition functions, and demonstrate strong empirical performance on a diverse set of sequential decision making tasks, including variants of top-$k$ optimization, multi-level set estimation, and sequence search." @default.
- W4302306014 created "2022-10-06" @default.
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- W4302306014 date "2022-10-04" @default.
- W4302306014 modified "2023-10-18" @default.
- W4302306014 title "Generalizing Bayesian Optimization with Decision-theoretic Entropies" @default.
- W4302306014 doi "https://doi.org/10.48550/arxiv.2210.01383" @default.
- W4302306014 hasPublicationYear "2022" @default.
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