Search Results for author: Assad A. Oberai

Found 10 papers, 1 papers with code

Solution of physics-based inverse problems using conditional generative adversarial networks with full gradient penalty

no code implementations8 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.

Generative Adversarial Network

A few-shot graph Laplacian-based approach for improving the accuracy of low-fidelity data

no code implementations29 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.

Deep Learning and Computational Physics (Lecture Notes)

no code implementations3 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.

Variationally Mimetic Operator Networks

no code implementations26 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).

The efficacy and generalizability of conditional GANs for posterior inference in physics-based inverse problems

no code implementations15 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.

Bayesian Inference

GAN-based Priors for Quantifying Uncertainty

1 code implementation27 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.

Bayesian Inference Generative Adversarial Network +4

Quantifying uncertainty with GAN-based priors

no code implementations25 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.

Bayesian Inference Generative Adversarial Network

GAN priors for Bayesian inference

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.

Bayesian Inference Generative Adversarial Network

Spectral Analysis Of Weighted Laplacians Arising In Data Clustering

no code implementations13 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.

Clustering

Bayesian Inference with Generative Adversarial Network Priors

no code implementations22 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.

Bayesian Inference Generative Adversarial Network

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