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Activity Number: 441
Type: Contributed
Date/Time: Tuesday, August 2, 2016 : 2:00 PM to 3:50 PM
Sponsor: Section on Bayesian Statistical Science
Abstract #320855
Title: Combining Multivariate Stochastic Process Models with Filter Methods for Constrained Optimization
Author(s): Tony Pourmohamad* and Herbie Lee
Companies: University of California at Santa Cruz and University of California at Santa Cruz
Keywords: Gaussian Process ; Constrained Optimization ; Filter Method ; Bayesian ; Computer Experiment ; Sequential Monte Carlo

Expensive black box systems arise in many engineering applications but can be difficult to optimize because their output functions may be complex, multi-modal, and difficult to understand. The task becomes even more challenging when the optimization is subject to constraints and no derivative information is available. In this presentation, we combine response surface modeling, sequential Monte Carlo, and filter methods in order to solve problems of this nature. Our modeling framework extends Gaussian process methodology for modeling of continuous multivariate spatial outputs by adding a latent process structure that allows for joint modeling of a variety of types of correlated outputs. In addition, we implement fully Bayesian inference using particle learning, which allows us to conduct fast sequential inference. By employing a filter algorithm for solving constrained optimization problems, we also establish two novel probabilistic metrics for guiding the filter. Overall, this hybridization of statistical modeling and nonlinear programming efficiently utilizes both global and local search in order to converge to a global solution to the constrained optimization problem.

Authors who are presenting talks have a * after their name.

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