no code implementations • 3 Apr 2024 • Didem Kochan, Xiu Yang
Introducing the QHMC method to the inequality and monotonicity constrained GP regression in the probabilistic sense, our approach improves the accuracy and reduces the variance in the resulting GP model.
no code implementations • 25 Sep 2022 • Bian Li, Hanchen Wang, Xiu Yang, Youzuo Lin
Previous works that concentrate on solving the wave equation by neural networks consider either a single velocity model or multiple simple velocity models, which is restricted in practice.
no code implementations • 15 Jun 2021 • Peiyuan Gao, Xiu Yang, Yu-Hang Tang, Muqing Zheng, Amity Anderson, Vijayakumar Murugesan, Aaron Hollas, Wei Wang
The solvation free energy of organic molecules is a critical parameter in determining emergent properties such as solubility, liquid-phase equilibrium constants, and pKa and redox potentials in an organic redox flow battery.
no code implementations • 19 Mar 2021 • Zhiwei Fang, Justin Zhang, Xiu Yang
In this paper, we show a physics-informed neural network solver for the time-dependent surface PDEs.
no code implementations • 3 Sep 2020 • Sheng Zhang, Xiu Yang, Samy Tindel, Guang Lin
We prove that under certain conditions, the observable and its derivatives of any order are governed by a single Gaussian random field, which is the aforementioned AGRF.
Statistics Theory Probability Statistics Theory
no code implementations • 3 Aug 2020 • Yixiang Deng, Guang Lin, Xiu Yang
We compare this method with the conventional multi-fidelity Cokriging method that does not use gradients information, and the result suggests that GE-Cokriging has a better performance in predicting both QoI and its gradients.
no code implementations • 7 Apr 2020 • Andrew Pensoneault, Xiu Yang, Xueyu Zhu
Gaussian Process (GP) regression is a flexible non-parametric approach to approximate complex models.
no code implementations • 7 Dec 2018 • Xiu Yang, Xueyu Zhu, Jing Li
In this work, we propose a framework that combines the approximation-theory-based multifidelity method and Gaussian-process-regression-based multifidelity method to achieve data-model convergence when stochastic simulation models and sparse accurate observation data are available.
no code implementations • 24 Nov 2018 • Xiu Yang, David Barajas-Solano, Guzel Tartakovsky, Alexandre Tartakovsky
In this work, we propose a new Gaussian process regression (GPR)-based multifidelity method: physics-informed CoKriging (CoPhIK).
no code implementations • 10 Sep 2018 • Xiu Yang, Guzel Tartakovsky, Alexandre Tartakovsky
We also provide an error estimate in preserving the physical constraints when errors are included in the stochastic model realizations.