no code implementations • 5 Jul 2023 • Yu-Hong Yeung, Ramakrishna Tipireddy, David A. Barajas-Solano, Alexandre M. Tartakovsky
We propose a methodology for improving the accuracy of surrogate models of the observable response of physical systems as a function of the systems' spatially heterogeneous parameter fields with applications to uncertainty quantification and parameter estimation in high-dimensional problems.
1 code implementation • 26 Jan 2023 • Yu-Hong Yeung, David A. Barajas-Solano, Alexandre M. Tartakovsky
On the other hand, in CKLEMAP, the number of unknowns (CKLE coefficients) is controlled by the smoothness of the parameter field and the number of measurements, and is in general much smaller than the number of discretization nodes, which leads to a significant reduction of computational cost with respect to the standard MAP method.
1 code implementation • 30 Jul 2021 • Yu-Hong Yeung, David A. Barajas-Solano, Alexandre M. Tartakovsky
In our approach, we extend the physics-informed conditional Karhunen-Lo\'{e}ve expansion (PICKLE) method for modeling subsurface flow with unknown flux (Neumann) and varying head (Dirichlet) boundary conditions.
BIG-bench Machine Learning Physics-informed machine learning