Search Results for author: David A. Barajas-Solano

Found 3 papers, 2 papers with code

Conditional Korhunen-Loéve regression model with Basis Adaptation for high-dimensional problems: uncertainty quantification and inverse modeling

no code implementations5 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.

Uncertainty Quantification

Gaussian process regression and conditional Karhunen-Loéve models for data assimilation in inverse problems

1 code implementation26 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.

regression

Physics-Informed Machine Learning Method for Large-Scale Data Assimilation Problems

1 code implementation30 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

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