no code implementations • 8 Jun 2023 • Deep Ray, Javier Murgoitio-Esandi, Agnimitra Dasgupta, Assad A. Oberai
The cWGAN developed in this work differs from earlier versions in that its critic is required to be 1-Lipschitz with respect to both the inferred and the measurement vectors and not just the former.
no code implementations • 29 Mar 2023 • Orazio Pinti, Assad A. Oberai
In the approach described in this paper, this is accomplished by constructing a graph Laplacian using the low-fidelity data and computing its low-lying spectrum.
no code implementations • 3 Jan 2023 • Deep Ray, Orazio Pinti, Assad A. Oberai
These notes were compiled as lecture notes for a course developed and taught at the University of the Southern California.
no code implementations • 26 Sep 2022 • Dhruv Patel, Deep Ray, Michael R. A. Abdelmalik, Thomas J. R. Hughes, Assad A. Oberai
The application of the VarMiON to a canonical elliptic PDE and a nonlinear PDE reveals that for approximately the same number of network parameters, on average the VarMiON incurs smaller errors than a standard DeepONet and a recently proposed multiple-input operator network (MIONet).
no code implementations • 15 Feb 2022 • Deep Ray, Harisankar Ramaswamy, Dhruv V. Patel, Assad A. Oberai
In this work, we train conditional Wasserstein generative adversarial networks to effectively sample from the posterior of physics-based Bayesian inference problems.
1 code implementation • 27 Mar 2020 • Dhruv V. Patel, Assad A. Oberai
Bayesian inference is used extensively to quantify the uncertainty in an inferred field given the measurement of a related field when the two are linked by a mathematical model.
no code implementations • 25 Sep 2019 • Dhruv V. Patel, Assad A. Oberai
Bayesian inference is used extensively to quantify the uncertainty in an inferred field given the measurement of a related field when the two are linked by a mathematical model.
no code implementations • NeurIPS Workshop Deep_Invers 2019 • Dhruv V. Patel, Assad A. Oberai
Bayesian inference is used extensively to infer and to quantify the uncertainty in a field of interest from a measurement of a related field when the two are linked by a mathematical model.
no code implementations • 13 Sep 2019 • Franca Hoffmann, Bamdad Hosseini, Assad A. Oberai, Andrew M. Stuart
Graph Laplacians computed from weighted adjacency matrices are widely used to identify geometric structure in data, and clusters in particular; their spectral properties play a central role in a number of unsupervised and semi-supervised learning algorithms.
no code implementations • 22 Jul 2019 • Dhruv Patel, Assad A. Oberai
In this work we demonstrate how this approximate distribution may be used as a prior in a Bayesian update, and how it addresses the challenges associated with characterizing complex prior distributions and the large dimension of the inferred field.