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- research-articleJune 2024
A model reduction method for parametric dynamical systems defined on complex geometries
Journal of Computational Physics (JOCP), Volume 506, Issue Chttps://doi.org/10.1016/j.jcp.2024.112923AbstractDynamic mode decomposition (DMD) describes the dynamical system in an equation-free manner and can be used for the prediction and control. It is an efficient data-driven method for the complex systems. In this paper, we extend DMD to the ...
- research-articleJanuary 2020
A Variable-Separation Method for Nonlinear Partial Differential Equations With Random Inputs
SIAM Journal on Scientific Computing (SISC), Volume 42, Issue 2Pages A723–A750https://doi.org/10.1137/19M1262486In this paper, we consider a variable-separation (VS) method to solve the nonlinear partial differential equations (PDEs) with random inputs. The aim of the VS method is to get a sep- arated representation of the Galerkin solution for nonlinear PDEs with ...
- research-articleJuly 2019
A multiscale virtual element method for elliptic problems in heterogeneous porous media
Journal of Computational Physics (JOCP), Volume 388, Issue CPages 394–415https://doi.org/10.1016/j.jcp.2019.03.031AbstractIn this paper, we propose a Multiscale Virtual Element Method (MsVEM) for elliptic problems in heterogeneous porous media. The use of very general coarse grids has advantages in subsurface simulations since they provide flexibility and can render ...
- research-articleJuly 2018
Multiscale model reduction for fluid infiltration simulation through dual-continuum porous media with localized uncertainties
Journal of Computational and Applied Mathematics (JCAM), Volume 336, Issue CPages 127–146https://doi.org/10.1016/j.cam.2017.12.040AbstractHere, we present some Reduced Basis (RB) methods for fluid infiltration problems through certain porous media modeled as dual-continuum with localized uncertainties. We apply dimension reduction techniques to construct a reduced order ...
- research-articleJune 2017
Model's sparse representation based on reduced mixed GMsFE basis methods
Journal of Computational Physics (JOCP), Volume 338, Issue CPages 285–312https://doi.org/10.1016/j.jcp.2017.02.055In this paper, we propose a model's sparse representation based on reduced mixed generalized multiscale finite element (GMsFE) basis methods for elliptic PDEs with random inputs. A typical application for the elliptic PDEs is the flow in heterogeneous ...
- research-articleJanuary 2017
A Novel Variable-Separation Method Based on Sparse and Low Rank Representation for Stochastic Partial Differential Equations
SIAM Journal on Scientific Computing (SISC), Volume 39, Issue 6Pages A2879–A2910https://doi.org/10.1137/16M1100010In this paper, we propose a novel variable-separation (VS) method for generic multivariate functions. The idea of the novel VS is extended to obtain the solution in tensor product structure for stochastic partial differential equations (SPDEs). Compared ...
- research-articleAugust 2016
Reduced multiscale finite element basis methods for elliptic PDEs with parameterized inputs
Journal of Computational and Applied Mathematics (JCAM), Volume 301, Issue CPages 101–120https://doi.org/10.1016/j.cam.2016.01.033In this paper, we present some reduced basis methods for elliptic PDEs with parameterized inputs. In the framework of Galerkin projection, dimension reduction techniques are used to construct a reduced order model. If the PDEs have multiscale structures,...
- research-articleJanuary 2016
A reduced order method for Allen-Cahn equations
Journal of Computational and Applied Mathematics (JCAM), Volume 292, Issue CPages 213–229https://doi.org/10.1016/j.cam.2015.07.009In this article, we present a reduced order method for modeling and computing Allen-Cahn equations. A global basis method is used in the discretized system of the Allen-Cahn equations and Proper Orthogonal Decomposition (POD) method is utilized to ...