Classification and computation of extreme events in turbulent combustion

M Hassanaly, V Raman - Progress in Energy and Combustion Science, 2021 - Elsevier
In the design of practical combustion systems, ensuring safety and reliability is an important
requirement. For instance, reliably avoiding lean blowout, flame flashback or inlet unstart is …

Dimensionality reduction for complex models via Bayesian compressive sensing

K Sargsyan, C Safta, HN Najm… - International Journal …, 2014 - dl.begellhouse.com
Uncertainty quantification in complex physical models is often challenged by the
computational expense of these models. One often needs to operate under the assumption …

Minimal multi-element stochastic collocation for uncertainty quantification of discontinuous functions

JD Jakeman, A Narayan, D Xiu - Journal of Computational Physics, 2013 - Elsevier
We propose a multi-element stochastic collocation method that can be applied in high-
dimensional parameter space for functions with discontinuities lying along manifolds of …

Escaping unknown discontinuous regions in blackbox optimization

C Audet, A Batailly, S Kojtych - SIAM Journal on Optimization, 2022 - SIAM
The design of key nonlinear systems often requires the use of expensive blackbox
simulations presenting inherent discontinuities whose positions in the variable space cannot …

Mercer kernels and integrated variance experimental design: connections between Gaussian process regression and polynomial approximation

A Gorodetsky, Y Marzouk - SIAM/ASA Journal on Uncertainty Quantification, 2016 - SIAM
This paper examines experimental design procedures used to develop surrogates of
computational models, exploring the interplay between experimental designs and …

Accelerated vibration reliability testing of electronic assemblies using sine dwell with resonance tracking

QT Su, MA Gharaibeh… - Journal of …, 2018 - asmedigitalcollection.asme.org
In this work, a sinusoidal vibration test method with resonance tracking is employed for
reliability testing of circuit assemblies. The system continuously monitors for changes in the …

Multi-element polynomial chaos expansion based on automatic discontinuity detection for nonlinear systems

J Dréau, B Magnain, A Batailly - Journal of Sound and Vibration, 2023 - Elsevier
This article focuses on the stochastic modeling of nonlinear systems featuring discontinuities
in their response surface. More specifically, original developments are presented to improve …

[HTML][HTML] Learning non-stationary and discontinuous functions using clustering, classification and Gaussian process modelling

M Moustapha, B Sudret - Computers & Structures, 2023 - Elsevier
Surrogate models have shown to be an extremely efficient aid in solving engineering
problems that require repeated evaluations of an expensive computational model. They are …

Efficient localization of discontinuities in complex computational simulations

A Gorodetsky, Y Marzouk - SIAM Journal on Scientific Computing, 2014 - SIAM
Surrogate models for computational simulations are input-output approximations that allow
computationally intensive analyses, such as uncertainty propagation and inference, to be …

Approximating smooth, multivariate functions on irregular domains

B Adcock, D Huybrechs - Forum of Mathematics, Sigma, 2020 - cambridge.org
In this paper, we introduce a method known as polynomial frame approximation for
approximating smooth, multivariate functions defined on irregular domains in, for a large …