Bayesian optimization with a finite budget: An approximate dynamic programming approach
We consider the problem of optimizing an expensive objective function when a finite budget of total evaluations is prescribed. In that context, the optimal solution strategy for Bayesian optimization can be formulated as a dynamic programming instance. This results in a complex problem with uncounta...
| Main Authors: | , , |
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| Format: | Article |
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Neural Information Processing Systems Foundation
2018
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| Online Access: | http://hdl.handle.net/1721.1/115164 https://orcid.org/0000-0003-4222-5358 https://orcid.org/0000-0003-2156-9338 |
| Summary: | We consider the problem of optimizing an expensive objective function when a finite budget of total evaluations is prescribed. In that context, the optimal solution strategy for Bayesian optimization can be formulated as a dynamic programming instance. This results in a complex problem with uncountable, dimension-increasing state space and an uncountable control space. We show how to approximate the solution of this dynamic programming problem using rollout, and propose rollout heuristics specifically designed for the Bayesian optimization setting. We present numerical experiments showing that the resulting algorithm for optimization with a finite budget outperforms several popular Bayesian optimization algorithms. |
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