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Optimization of black-box models with uncertain climatic inputs—Application to sunflower ideotype design
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Optimization of black-box models with uncertain climatic inputs—Application to sunflower ideotype design
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Journal Article
Optimization of black-box models with uncertain climatic inputs—Application to sunflower ideotype design
2017
Overview
Accounting for the interannual climatic variations is a well-known issue for simulation-based studies of environmental systems. It often requires intensive sampling (e.g., averaging the simulation outputs over many climatic series), which hinders many sequential processes, in particular optimization algorithms. We propose here an approach based on a subset selection in a large basis of climatic series, using an ad-hoc similarity function and clustering. A non-parametric reconstruction technique is introduced to estimate accurately the distribution of the output of interest using only the subset sampling. The proposed strategy is non-intrusive and generic (i.e. transposable to most models with climatic data inputs), and can be combined to most \"off-the-shelf\" optimization solvers. We apply our approach to sunflower ideotype design using the crop model SUNFLO. The underlying optimization problem is formulated as a multi-objective one to account for risk-aversion. Our approach achieves good performances even for limited computational budgets, outperforming significantly standard strategies.
Publisher
Public Library of Science,Public Library of Science (PLoS)
