Informing Missing Physics with Model Form Error and Model Selection
TITLE:
Informing Missing Physics with Model Form Error and Model Selection
DATE:
Friday, October 1, 2021
TIME:
3:30 PM
LOCATION:
Virtual Zoom Conference
SPEAKER:
Dr. Kathryn A. Maupin, Senior Member of the Technical Staff, Optimization and Uncertainty Quantification, Sandia National Laboratories
ABSTRACT:
Despite continuing advances in statistical inversion and modeling, model inadequacy due to model form error remains a concern in all areas of mathematical modeling. Much like physical models, calibrating a discrepancy model requires careful consideration regarding formulation, parameter estimation, and uncertainty quantification, each of which is often problem-specific. At the intersection of model form error quantification and model selection lies a systematic methodology for identifying and characterizing model form error as a means of identifying missing physics or unknown phenomena, which has the potential to inform model development and experimental design. One such methodology is presented.
*Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
Bio: Kathryn Maupin is a Senior Member of the Technical Staff at Sandia National Laboratories. Her research focuses on model form error quantification and multiobjective surrogate modeling. Broader research interests include Bayesian methods, model validation, sensitivity analysis, and uncertainty quantification. Kathryn joined Sandia as a postdoc in 2016 and converted to a staff position in 2018. She received her Ph.D. in Computational Sciences, Engineering and Mathematics and her M.S. in Computational and Applied Mathematics from the University of Texas at Austin after completing her B.A. in Applied Mathematics at the University of California, San Diego. When she is not working, Kathryn spends her time playing with her two girls and three dogs.
HOST:
Rodrigo Navarro Perez
VIDEO: