Optimization of Agent-Based Models Through Coarse-Graining

Sherli Koshy-Chenthittayil
Center for Quantitative Medicine, University of Connecticut Health Center (koshychenthittayil@uchc.edu)

Pedro Mendes
bCenter for Quantitative Medicine and Center for Cell Analysis and Modeling, University of Connecticut Health Center (pmendes@uchc.edu)

Reinhard Laubenbacher
Department of Medicine, University of Florida (reinhard.laubenbacher@medicine.ufl.edu)

Abstract

Optimization and control are important objectives across biology and biomedicine, and mathematical models are a key enabling technology. This paper reports a computational study of model-based multi-objective optimization in the setting of microbial ecology, using agent-based models. This modeling framework is well-suited to the field, but is not amenable to standard control-theoretic approaches. Furthermore, due to computational complexity, simulation-based optimization approaches are often challenging to implement. This paper presents the results of an approach that combines control-dependent model reduction with Pareto optimization, applied to two models of multi-species bacterial biofilms. It shows that this approach can be successful for models whose computational complexity prevents effective simulation-based optimization.

Keywords: Optimization ,Agent-based models ,Pareto frontier ,Microbial biofilms

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