Search Results for author: Mamikon Gulian

Found 7 papers, 0 papers with code

Solving High-Dimensional Inverse Problems with Auxiliary Uncertainty via Operator Learning with Limited Data

no code implementations20 Mar 2023 Joseph Hart, Mamikon Gulian, Indu Manickam, Laura Swiler

In complex large-scale systems such as climate, important effects are caused by a combination of confounding processes that are not fully observable.

Operator learning Uncertainty Quantification

Error-in-variables modelling for operator learning

no code implementations22 Apr 2022 Ravi G. Patel, Indu Manickam, Myoungkyu Lee, Mamikon Gulian

We propose error-in-variables (EiV) models for two operator regression methods, MOR-Physics and DeepONet, and demonstrate that these new models reduce bias in the presence of noisy independent variables for a variety of operator learning problems.

Model Discovery Operator learning +1

Probabilistic partition of unity networks: clustering based deep approximation

no code implementations7 Jul 2021 Nat Trask, Mamikon Gulian, Andy Huang, Kookjin Lee

We enrich POU-Nets with a Gaussian noise model to obtain a probabilistic generalization amenable to gradient-based minimization of a maximum likelihood loss.

Clustering Probabilistic Deep Learning +2

Gaussian Process Regression constrained by Boundary Value Problems

no code implementations22 Dec 2020 Mamikon Gulian, Ari Frankel, Laura Swiler

The framework may be applied to infer the solution of a well-posed boundary value problem with a known second-order differential operator and boundary conditions, but for which only scattered observations of the source term are available.

Gaussian Processes regression

Data-driven learning of robust nonlocal physics from high-fidelity synthetic data

no code implementations17 May 2020 Huaiqian You, Yue Yu, Nathaniel Trask, Mamikon Gulian, Marta D'Elia

A key challenge to nonlocal models is the analytical complexity of deriving them from first principles, and frequently their use is justified a posteriori.

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