Search Results for author: Xun Huan

Found 14 papers, 2 papers with code

Variational Bayesian Optimal Experimental Design with Normalizing Flows

no code implementations8 Apr 2024 Jiayuan Dong, Christian Jacobsen, Mehdi Khalloufi, Maryam Akram, Wanjiao Liu, Karthik Duraisamy, Xun Huan

Variational OED (vOED), in contrast, estimates a lower bound of the EIG without likelihood evaluations by approximating the posterior distributions with variational forms, and then tightens the bound by optimizing its variational parameters.

Dimensionality Reduction Experimental Design

Goal-Oriented Bayesian Optimal Experimental Design for Nonlinear Models using Markov Chain Monte Carlo

no code implementations26 Mar 2024 Shijie Zhong, Wanggang Shen, Tommie Catanach, Xun Huan

We present a computational framework of predictive goal-oriented OED (GO-OED) suitable for nonlinear observation and prediction models, which seeks the experimental design providing the greatest EIG on the QoIs.

Bayesian Optimization Density Estimation +1

Uncertainty Quantification of Graph Convolution Neural Network Models of Evolving Processes

no code implementations17 Feb 2024 Jeremiah Hauth, Cosmin Safta, Xun Huan, Ravi G. Patel, Reese E. Jones

In this work we present comparisons of the parametric uncertainty quantification of neural networks modeling complex spatial-temporal processes with Hamiltonian Monte Carlo and Stein variational gradient descent and its projected variant.

Uncertainty Quantification Variational Inference

Enhancing Dynamical System Modeling through Interpretable Machine Learning Augmentations: A Case Study in Cathodic Electrophoretic Deposition

no code implementations16 Jan 2024 Christian Jacobsen, Jiayuan Dong, Mehdi Khalloufi, Xun Huan, Karthik Duraisamy, Maryam Akram, Wanjiao Liu

We introduce a comprehensive data-driven framework aimed at enhancing the modeling of physical systems, employing inference techniques and machine learning enhancements.

Interpretable Machine Learning

Variational Sequential Optimal Experimental Design using Reinforcement Learning

no code implementations17 Jun 2023 Wanggang Shen, Jiayuan Dong, Xun Huan

We introduce variational sequential Optimal Experimental Design (vsOED), a new method for optimally designing a finite sequence of experiments under a Bayesian framework and with information-gain utilities.

Experimental Design reinforcement-learning

FP-IRL: Fokker-Planck-based Inverse Reinforcement Learning -- A Physics-Constrained Approach to Markov Decision Processes

no code implementations17 Jun 2023 Chengyang Huang, Siddhartha Srivastava, Xun Huan, Krishna Garikipati

We identify specific manifestations of this isomorphism and use them to create a novel physics-aware IRL algorithm, FP-IRL, which can simultaneously infer the transition and reward functions using only observed trajectories.

Uncertainty Quantification in Machine Learning for Engineering Design and Health Prognostics: A Tutorial

1 code implementation7 May 2023 Venkat Nemani, Luca Biggio, Xun Huan, Zhen Hu, Olga Fink, Anh Tran, Yan Wang, Xiaoge Zhang, Chao Hu

In this tutorial, we aim to provide a holistic lens on emerging UQ methods for ML models with a particular focus on neural networks and the applications of these UQ methods in tackling engineering design as well as prognostics and health management problems.

Decision Making Management +2

Shapley-based Explainable AI for Clustering Applications in Fault Diagnosis and Prognosis

no code implementations25 Mar 2023 Joseph Cohen, Xun Huan, Jun Ni

The rules, limited to 1-2 terms utilizing original feature scales, describe 12 out of the 16 derived equipment failure clusters with precision exceeding 0. 85, showcasing the promising utility of the explainable clustering framework for intelligent manufacturing applications.

Clustering Explainable artificial intelligence +2

Fault Prognosis of Turbofan Engines: Eventual Failure Prediction and Remaining Useful Life Estimation

no code implementations23 Mar 2023 Joseph Cohen, Xun Huan, Jun Ni

In the era of industrial big data, prognostics and health management is essential to improve the prediction of future failures to minimize inventory, maintenance, and human costs.

Management

Bayesian Sequential Optimal Experimental Design for Nonlinear Models Using Policy Gradient Reinforcement Learning

no code implementations28 Oct 2021 Wanggang Shen, Xun Huan

We formulate this sequential optimal experimental design (sOED) problem as a finite-horizon partially observable Markov decision process (POMDP) in a Bayesian setting and with information-theoretic utilities.

Experimental Design reinforcement-learning +1

Sequential Bayesian optimal experimental design via approximate dynamic programming

1 code implementation28 Apr 2016 Xun Huan, Youssef M. Marzouk

Advantages over batch and greedy design are then demonstrated on a nonlinear source inversion problem where we seek an optimal policy for sequential sensing.

Experimental Design

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