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A filter-based approach for global sensitivity analysis of models with functional inputs

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  • Roux, Sébastien
  • Loisel, Patrice
  • Buis, Samuel

Abstract

We design a method called filter-based global sensitivity analysis (filter-based GSA) to analyze computer models with functional inputs. Understanding the impact of functional inputs is central in many applications like building energy or environmental studies. The present work is a step further in the analysis of the impact of functional inputs signal components onto model responses of interest. To perform filter-based GSA, the functional inputs are modified with filters in order to either enhance or suppress some components in the signal. The influence of filters on the model response is assessed by computing the Sobol’ indices of Boolean factors that trigger the filters application. Two relationships between these indices and the error resulting from the filters application are established. The method is illustrated with smoothing filters applied on the climatic inputs of a toy model simulating crop yield. We show that the high frequencies for three out of the four climatic inputs are not important in the tested configuration. The present method does not require any hypotheses on the model or the type of filters used. It seems promising for model understanding, validation or simplification.

Suggested Citation

  • Roux, Sébastien & Loisel, Patrice & Buis, Samuel, 2019. "A filter-based approach for global sensitivity analysis of models with functional inputs," Reliability Engineering and System Safety, Elsevier, vol. 187(C), pages 119-128.
    • Handle: RePEc:eee:reensy:v:187:y:2019:i:c:p:119-128
    DOI: 10.1016/j.ress.2019.01.012
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    References listed on IDEAS

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    1. Fruth, J. & Roustant, O. & Kuhnt, S., 2015. "Sequential designs for sensitivity analysis of functional inputs in computer experiments," Reliability Engineering and System Safety, Elsevier, vol. 134(C), pages 260-267.
    2. Ruffo, Paolo & Bazzana, Livia & Consonni, Alberto & Corradi, Anna & Saltelli, Andrea & Tarantola, Stefano, 2006. "Hydrocarbon exploration risk evaluation through uncertainty and sensitivity analyses techniques," Reliability Engineering and System Safety, Elsevier, vol. 91(10), pages 1155-1162.
    3. Iooss, Bertrand & Ribatet, Mathieu, 2009. "Global sensitivity analysis of computer models with functional inputs," Reliability Engineering and System Safety, Elsevier, vol. 94(7), pages 1194-1204.
    4. Sobol’, I.M. & Tarantola, S. & Gatelli, D. & Kucherenko, S.S. & Mauntz, W., 2007. "Estimating the approximation error when fixing unessential factors in global sensitivity analysis," Reliability Engineering and System Safety, Elsevier, vol. 92(7), pages 957-960.
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