SO-I: a surrogate model algorithm for expensive nonlinear integer programming problems including global optimization applications

Juliane Müller (), Christine Shoemaker and Robert Piché

Journal of Global Optimization, 2014, vol. 59, issue 4, 865-889

Abstract: This paper presents the surrogate model based algorithm SO-I for solving purely integer optimization problems that have computationally expensive black-box objective functions and that may have computationally expensive constraints. The algorithm was developed for solving global optimization problems, meaning that the relaxed optimization problems have many local optima. However, the method is also shown to perform well on many local optimization problems, and problems with linear objective functions. The performance of SO-I, a genetic algorithm, Nonsmooth Optimization by Mesh Adaptive Direct Search (NOMAD), SO-MI (Müller et al. in Comput Oper Res 40(5):1383–1400, 2013 ), variable neighborhood search, and a version of SO-I that only uses a local search has been compared on 17 test problems from the literature, and on eight realizations of two application problems. One application problem relates to hydropower generation, and the other one to throughput maximization. The numerical results show that SO-I finds good solutions most efficiently. Moreover, as opposed to SO-MI, SO-I is able to find feasible points by employing a first optimization phase that aims at minimizing a constraint violation function. A feasible user-supplied point is not necessary. Copyright Springer Science+Business Media New York 2014

Keywords: Integer optimization; Derivative-free; Computationally expensive; Surrogate model; Response surface; Linear and nonlinear; Nonconvex; Radial basis functions; Multimodal; Global optimization (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (3)

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DOI: 10.1007/s10898-013-0101-y

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