Multi-fidelity Bayesian neural networks: Algorithms and applications

X Meng, H Babaee, GE Karniadakis - Journal of Computational Physics, 2021 - Elsevier
We propose a new class of Bayesian neural networks (BNNs) that can be trained using
noisy data of variable fidelity, and we apply them to learn function approximations as well as …

[HTML][HTML] Deep learning-based surrogate model for three-dimensional patient-specific computational fluid dynamics

P Du, X Zhu, JX Wang - Physics of Fluids, 2022 - pubs.aip.org
Optimization and uncertainty quantification have been playing an increasingly important role
in computational hemodynamics. However, existing methods based on principled modeling …

Data assimilation predictive GAN (DA-PredGAN) applied to a spatio-temporal compartmental model in epidemiology

VLS Silva, CE Heaney, Y Li, CC Pain - Journal of Scientific Computing, 2023 - Springer
We propose a novel use of generative adversarial networks (GANs)(i) to make predictions in
time (PredGAN) and (ii) to assimilate measurements (DA-PredGAN). In the latter case, we …

[HTML][HTML] Aleatory uncertainty quantification based on multi-fidelity deep neural networks

Z Li, F Montomoli - Reliability Engineering & System Safety, 2024 - Elsevier
Traditional methods for uncertainty quantification (UQ) struggle with the curse of
dimensionality when dealing with high-dimensional problems. One approach to address this …

Bi-fidelity stochastic collocation methods for epidemic transport models with uncertainties

G Bertaglia, L Liu, L Pareschi, X Zhu - arXiv preprint arXiv:2110.14579, 2021 - arxiv.org
Uncertainty in data is certainly one of the main problems in epidemiology, as shown by the
recent COVID-19 pandemic. The need for efficient methods capable of quantifying …

Multifidelity data fusion in convolutional encoder/decoder networks

L Partin, G Geraci, AA Rushdi, MS Eldred… - Journal of …, 2023 - Elsevier
We analyze the regression accuracy of convolutional neural networks assembled from
encoders, decoders and skip connections and trained with multifidelity data. Besides …

Data Assimilation Predictive GAN (DA-PredGAN): applied to determine the spread of COVID-19

VLS Silva, CE Heaney, Y Li, CC Pain - arXiv preprint arXiv:2105.07729, 2021 - arxiv.org
We propose the novel use of a generative adversarial network (GAN)(i) to make predictions
in time (PredGAN) and (ii) to assimilate measurements (DA-PredGAN). In the latter case, we …

Surrogate modelling and uncertainty quantification based on multi-fidelity deep neural network

Z Li, F Montomoli - arXiv preprint arXiv:2308.01261, 2023 - arxiv.org
To reduce training costs, several Deep neural networks (DNNs) that can learn from a small
set of HF data and a sufficient number of low-fidelity (LF) data have been proposed. In these …

A non-intrusive bi-fidelity reduced basis method for time-independent problems

JSR Park, X Zhu - Journal of Computational Physics, 2024 - Elsevier
Scientific and engineering problems often involve parametric partial differential equations
(PDEs), such as uncertainty quantification, optimizations, and inverse problems. However …

[PDF][PDF] A Surrogate Reduced Order Model of the Unsteady Advection Dominant Problems Based on Combination of Deep Autoencoders-LSTM and POD

M Kherad, MK Moayyedi, F Fotouhi - Advances in Applied …, 2024 - doc.global-sci.org
Model Order Reduction is an approximation of the main system so that the simplified system
retains important features of the main system. Deep learning technology is a recent …