全部文献期刊会议图书|学者科研项目
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作者:Qian Wang , Nicolò Ripamonti , Jan S. Hesthaven
来源:[J].Journal of Computational Physics(IF 2.138), 2020
摘要:Abstract(#br)Closure modeling based on the Mori-Zwanzig formalism has proven effective to improve the stability and accuracy of projection-based model order reduction. However, closure models are often expensive and infeasible for complex nonlinear systems. Towards efficient mode...
作者:Weizhang Huang , Yanqiu Wang
来源:[J].Journal of Computational Physics(IF 2.138), 2020, Vol.410
摘要:Abstract(#br)Anisotropic mesh quality measures and adaptation are studied for convex polygonal meshes. Three sets of alignment and equidistribution measures are developed, based on least squares fitting, generalized barycentric mappings, and the singular value decomposition, resp...
作者:Sibusiso Mabuza , John N. Shadid , Eric C. Cyr ...
来源:[J].Journal of Computational Physics(IF 2.138), 2020, Vol.410
摘要:Abstract(#br)In this work, a stabilized continuous Galerkin (CG) method for magnetohydrodynamics (MHD) is presented. Ideal, compressible inviscid MHD equations are discretized in space on unstructured meshes using piecewise linear or bilinear finite element bases to get a semi-di...
作者:Nan Chen , Andrew J. Majda
来源:[J].Journal of Computational Physics(IF 2.138), 2020, Vol.410
摘要:Abstract(#br)A nonlinear optimal smoother and an associated optimal strategy of sampling hidden model trajectories are developed for a rich class of complex nonlinear turbulent dynamical systems with partial and noisy observations. Despite the strong nonlinearity and the signific...
作者:David Cohen , Jianbo Cui , Jialin Hong ...
来源:[J].Journal of Computational Physics(IF 2.138), 2020, Vol.410
摘要:Abstract(#br)This article presents explicit exponential integrators for stochastic Maxwell's equations driven by both multiplicative and additive noises. By utilizing the regularity estimate of the mild solution, we first prove that the strong order of the numerical approximation...
作者:P.H. Lam , H.C. So , C.F. Chan
来源:[J].Journal of Computational Physics(IF 2.138), 2020, Vol.410
摘要:Abstract(#br)The Mittag-Leffler function (MLF) is fundamental to solving fractional calculus problems. An exponential sum approximation for the single-parameter MLF with negative input is proposed. Analysis shows that the approximation, which is based on the Gauss-Legendre quadra...
作者:Karl Sabelfeld
来源:[J].Journal of Computational Physics(IF 2.138), 2020
摘要:Abstract(#br)We suggest in this paper a new stochastic simulation algorithm for solving narrow escape problems governed by drift-diffusion-reaction equations of high dimension. The developed method drastically improves the efficiency of the diffusion trajectory tracking algorithm...
作者:Kjetil O. Lye , Siddhartha Mishra , Deep Ray
来源:[J].Journal of Computational Physics(IF 2.138), 2020
摘要:Abstract(#br)Many large scale problems in computational fluid dynamics such as uncertainty quantification, Bayesian inversion, data assimilation and PDE constrained optimization are considered very challenging computationally as they require a large number of expensive (forward) ...
作者:James Bremer
来源:[J].Journal of Computational Physics(IF 2.138), 2020
摘要:Abstract(#br)Standard solvers for the variable coefficient Helmholtz equation in two spatial dimensions have running times which grow at least quadratically with the wavenumber k . Here, we describe a solver which applies only when the scattering potential is radially symmet...
作者:Alexander Zaitzeff , Selim Esedoḡlu , Krishna Garikipati
来源:[J].Journal of Computational Physics(IF 2.138), 2020
摘要:Abstract(#br)The threshold dynamics algorithm of Merriman, Bence, and Osher is only first order accurate in the two-phase setting. Its accuracy degrades further to half order in the multi-phase setting, a shortcoming it has in common with other related, more recent algorithm...

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