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Surrogate modeling: tricks that endured the test of time and some recent developments

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Abstract

Tasks such as analysis, design optimization, and uncertainty quantification can be computationally expensive. Surrogate modeling is often the tool of choice for reducing the burden associated with such data-intensive tasks. However, even after years of intensive research, surrogate modeling still involves a struggle to achieve maximum accuracy within limited resources. This work summarizes various advanced, yet often straightforward, statistical tools that help. We focus on four techniques with increasing popularity in the surrogate modeling community: (i) variable screening and dimensionality reduction in both the input and the output spaces, (ii) data sampling techniques or design of experiments, (iii) simultaneous use of multiple surrogates, and (iv) sequential sampling. We close the paper with some suggestions for future research.

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Notes

  1. Nevertheless, cross-validation should be used with caution, since the literature has reported problems such as bias in error estimation (Picard and Cook 1984; Varma and Simon 2006).

  2. In practice, k-fold implementations are influenced by the size of datasets. With small to medium datasets, using clustering algorithms, such as k-means (Kanungo et al. 2002), improves robustness. When datasets are very large, clustering is very time consuming and potentially less important. Therefore, random selection is commonly used.

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Acknowledgements

This paper is dedicated to Dr. Raphael T. Haftka. All three authors of this paper had the honor to have Dr. Haftka as their doctoral supervisor. Dr. Haftka’s legacy in multi-disciplinary optimization, surrogate modeling, uncertainty quantification, structural analysis, and other engineering disciplines is everlasting. His influence in the education of scientists and engineers will remain alive for many years to come.

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Correspondence to Felipe A. C. Viana.

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Viana, F.A.C., Gogu, C. & Goel, T. Surrogate modeling: tricks that endured the test of time and some recent developments. Struct Multidisc Optim 64, 2881–2908 (2021). https://doi.org/10.1007/s00158-021-03001-2

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  • DOI: https://doi.org/10.1007/s00158-021-03001-2

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