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Bayesian Optimization with Inequality Constraints
Authors: Jacob Gardner, Matt Kusner, Kilian Q. Weinberger, John Cunningham and Zhixiang Xu
Conference: Proceedings of the 31st International Conference on Machine Learning (ICML-14)
Abstract: Bayesian optimization is a powerful framework for minimizing expensive objective functions while using very few function evaluations. It has been successfully applied to a variety of problems, including hyperparameter tuning and experimental design. However, this framework has not been extended to the inequality-constrained optimization setting, particularly the setting in which evaluating feasibility is just as expensive as evaluating the objective. Here we present constrained Bayesian optimization, which places a prior distribution on both the objective and the constraint functions. We evaluate our method on simulated and real data, demonstrating that constrained Bayesian optimization can quickly find optimal and feasible points, even when small feasible regions cause standard methods to fail.
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