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Dominant parameter selection in the marginally identifiable case

Author

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  • Ioslovich, Ilya
  • Gutman, Per-Olof
  • Seginer, Ido

Abstract

Often a rather limited set of experimental data is available for the identification of a dynamic model, which contains many parameters. This is, e.g. the usual case for crop growth models. In this situation, only some parameter values can be estimated. Based on an analysis of the Fisher information matrix, a method for a reasonable selection of parameters is suggested here. The method chooses the most sensitive parameters, i.e. those to which the model under the considered experimental conditions is most sensitive, and excludes both coupled parameters and those that exhibit multiplecorrelation. A comparison with different ridge regression methods is made. The methodology is illustrated with a simple lettuce growth model.

Suggested Citation

  • Ioslovich, Ilya & Gutman, Per-Olof & Seginer, Ido, 2004. "Dominant parameter selection in the marginally identifiable case," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 65(1), pages 127-136.
    • Handle: RePEc:eee:matcom:v:65:y:2004:i:1:p:127-136
    DOI: 10.1016/j.matcom.2003.09.012
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    Cited by:

    1. Linker, Raphael & Johnson-Rutzke, Corinne, 2005. "Modeling the effect of abrupt changes in nitrogen availability on lettuce growth, root-shoot partitioning and nitrate concentration," Agricultural Systems, Elsevier, vol. 86(2), pages 166-189, November.
    2. Linker, Raphael & Kisekka, Isaya, 2022. "Concurrent data assimilation and model-based optimization of irrigation scheduling," Agricultural Water Management, Elsevier, vol. 274(C).

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