Search Results for author: Xu Wu

Found 10 papers, 0 papers with code

Clustering and Uncertainty Analysis to Improve the Machine Learning-based Predictions of SAFARI-1 Control Follower Assembly Axial Neutron Flux Profiles

no code implementations20 Dec 2023 Lesego Moloko, Pavel Bokov, Xu Wu, Kostadin Ivanov

The aim of this work is to improve the ML models for the control assemblies by a combination of supervised and unsupervised ML algorithms.

Deep Generative Modeling-based Data Augmentation with Demonstration using the BFBT Benchmark Void Fraction Datasets

no code implementations19 Aug 2023 Farah Alsafadi, Xu Wu

Deep learning (DL) has achieved remarkable successes in many disciplines such as computer vision and natural language processing due to the availability of ``big data''.

Data Augmentation

Reduced Order Modeling of a MOOSE-based Advanced Manufacturing Model with Operator Learning

no code implementations18 Aug 2023 Mahmoud Yaseen, Dewen Yushu, Peter German, Xu Wu

The goal of this work is to develop an accurate and fast-running reduced order model (ROM) for this MOOSE-based AM model that can be used in a DRL-based process control and optimization method.

Operator learning

Fast and Accurate Reduced-Order Modeling of a MOOSE-based Additive Manufacturing Model with Operator Learning

no code implementations4 Aug 2023 Mahmoud Yaseen, Dewen Yushu, Peter German, Xu Wu

More specifically, we used the Fourier neural operator (FNO) and deep operator network (DeepONet) to develop ROMs for time-dependent responses.

Dimensionality Reduction Operator learning

Functional PCA and Deep Neural Networks-based Bayesian Inverse Uncertainty Quantification with Transient Experimental Data

no code implementations10 Jul 2023 Ziyu Xie, Mahmoud Yaseen, Xu Wu

This work focuses on developing an inverse UQ process for time-dependent responses, using dimensionality reduction by functional principal component analysis (PCA) and deep neural network (DNN)-based surrogate models.

Dimensionality Reduction Uncertainty Quantification

Prediction and Uncertainty Quantification of SAFARI-1 Axial Neutron Flux Profiles with Neural Networks

no code implementations16 Nov 2022 Lesego E. Moloko, Pavel M. Bokov, Xu Wu, Kostadin N. Ivanov

In this study, Deep Neural Networks (DNNs) are used to predict the assembly axial neutron flux profiles in the SAFARI-1 research reactor, with quantified uncertainties in the ANN predictions and extrapolation to cycles not used in the training process.

Uncertainty Quantification Variational Inference

Quantification of Deep Neural Network Prediction Uncertainties for VVUQ of Machine Learning Models

no code implementations27 Jun 2022 Mahmoud Yaseen, Xu Wu

In this work, we focus on UQ of ML models as a preliminary step of ML VVUQ, more specifically, Deep Neural Networks (DNNs) because they are the most widely used supervised ML algorithm for both regression and classification tasks.

Uncertainty Quantification

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