Kernel principal component analysis for stochastic input model generation

X Ma, N Zabaras - Journal of Computational Physics, 2011 - Elsevier
Stochastic analysis of random heterogeneous media provides useful information only if
realistic input models of the material property variations are used. These input models are …

CFD Uncertainty Quantification using stochastic spectral methods—Exemplary application to a buoyancy-driven mixing process

PJ Wenig, S Kelm, M Klein - Nuclear Engineering and Design, 2023 - Elsevier
The consideration of uncertainties is of particular importance for nuclear reactor safety,
where high safety standards for example ensure the integrity of the containment. By means …

Uncertainty quantification given discontinuous model response and a limited number of model runs

K Sargsyan, C Safta, B Debusschere, H Najm - SIAM Journal on Scientific …, 2012 - SIAM
We outline a methodology for forward uncertainty quantification in systems with uncertain
parameters, discontinuous model response, and a limited number of model runs. Our …

Robust optimization of well location to enhance hysteretical trap** of CO2: Assessment of various uncertainty quantification methods and utilization of mixed …

M Babaei, I Pan, A Alkhatib - Water Resources Research, 2015 - Wiley Online Library
The paper aims to solve a robust optimization problem (optimization in presence of
uncertainty) for finding the optimal locations of a number of CO2 injection wells for …

Surrogate construction via weight parameterization of residual neural networks

OH Diaz-Ibarra, K Sargsyan, HN Najm - Computer Methods in Applied …, 2025 - Elsevier
Surrogate model development is a critical step for uncertainty quantification or other sample-
intensive tasks for complex computational models. In this work we develop a multi-output …

Modeling auto-ignition transients in reacting diesel jets

L Hakim, G Lacaze, M Khalil… - … of Engineering for …, 2016 - asmedigitalcollection.asme.org
The objective of the present work is to establish a framework to design simple Arrhenius
mechanisms for simulation of diesel engine combustion. The goal is to predict auto-ignition …

Preconditioned Bayesian regression for stochastic chemical kinetics

A Alexanderian, F Rizzi, M Rathinam… - Journal of Scientific …, 2014 - Springer
We develop a preconditioned Bayesian regression method that enables sparse polynomial
chaos representations of noisy outputs for stochastic chemical systems with uncertain …

Uncertainty quantification for subsurface flow and transport: Co** with nonlinearity/irregularity via polynomial chaos surrogate and machine learning

J Meng, H Li - Water Resources Research, 2018 - Wiley Online Library
Subsurface flow and transport problems usually involve some degree of uncertainty.
Polynomial chaos expansion can be used as surrogate of physical models for uncertainty …

Uncertainty propagation using conditional random fields in large-eddy simulations of scramjet computations

X Huan, C Safta, ZP Vane, G Lacaze… - AIAA Scitech 2019 …, 2019 - arc.aiaa.org
Research in powered hypersonic flight has thrived in the past decades with strong interests
from both military and civilian aerospace applications [1, 2]. Among others, one significant …

On spectral methods for variance based sensitivity analysis

A Alexanderian - 2013 - projecteuclid.org
Consider a mathematical model with a finite number of random parameters. Variance based
sensitivity analysis provides a framework to characterize the contribution of the individual …