Efficient updating of PDE models for metrology. (February 2016)

• Record Type: Journal Article
• Authors: Esward, T.J.; Wright, L.
• Is Part Of: Measurement. Volume 79(2016:Feb.)
• Page Start: 267
• Page End: 275
• Publication Date: 2016-02
• Subjects: Model -- Partial differential equation -- Model selection; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2015.06.012
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Created a methodology to assess the effects of changing a PDE model on the results. Compares complicated models to a simple model without solving complicated models. Illustrated by application to a simple problem. Abstract: We describe a model selection methodology for partial differential equation (PDE) based models and show the results of applying it to a test problem. A methodology for comparing and choosing simplified models is of benefit to the model development process in metrology. It is assumed that the computational aim is not only to solve the model to obtain the results that the metrologist requires, but also to ensure that the model is no more complex than necessary to achieve this, and that results can be obtained in a reasonable time using the available computing resources. The advantage of the proposed method is that it avoids the need to solve directly the underlying complex model. We present the results of comparisons of four models of the test problem and identify the further work needed to improve the approach and to extend it to a wider range of problems.