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检索条件"主题词=multigrid algorithms"
20 条 记 录,以下是1-10 订阅
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On the Role of Ill-conditioning: Biharmonic Eigenvalue Problem and multigrid algorithms
On the Role of Ill-conditioning: Biharmonic Eigenvalue Probl...
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作者: Kasey Bray University of Kentucky
学位级别:博士
Very fine discretizations of differential operators often lead to large, sparse matrices A, where the condition number of A is large. Such ill-conditioning has well known effects on both solving linear systems and eig... 详细信息
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multigrid algorithms FOR hp-DISCONTINUOUS GALERKIN DISCRETIZATIONS OF ELLIPTIC PROBLEMS
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SIAM JOURNAL ON NUMERICAL ANALYSIS 2015年 第1期53卷 598-618页
作者: Antonietti, Paola F. Sarti, Marco Verani, Marco Politecn Milan Dipartimento Matemat MOX Lab Modeling & Sci Comp I-20133 Milan Italy
We present W-cycle h-, p-, and hp-multigrid algorithms for the solution of the linear system of equations arising from a wide class of hp-version discontinuous Galerkin discretizations of elliptic problems. Starting f... 详细信息
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A refined convergence analysis of multigrid algorithms for elliptic equations
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ANALYSIS AND APPLICATIONS 2015年 第3期13卷 255-290页
作者: Chang, Qianshun Jia, Rong-Qing Jiangsu Normal Univ Sch Math & Stat Xuzhou 221116 Peoples R China Chinese Acad Sci Acad Math & Syst Sci Beijing Peoples R China Univ Alberta Dept Math & Stat Sci Edmonton AB T6G 2G1 Canada
multigrid algorithms, in particular, multigrid V-cycles, are investigated in this paper. We establish a general theory for convergence of the multigrid algorithm under certain approximation conditions and smoothing co... 详细信息
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APPLICATIONS OF multigrid algorithms TO FINITE DIFFERENCE SCHEMES FOR ELLIPTIC EQUATIONS WITH VARIABLE COEFFICIENTS
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SIAM JOURNAL ON SCIENTIFIC COMPUTING 2014年 第3期36卷 A1140-A1162页
作者: Jia, Rong-Qing Univ Alberta Dept Math & Stat Sci Edmonton AB T6G 2G1 Canada
This paper is devoted to a study of multigrid algorithms applied to finite difference schemes. If the elliptic equation has variable coefficients, the analysis of multigrid algorithms in the existent literature only g... 详细信息
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Optimized parametric inference for the inner loop of the multigrid Ensemble Kalman Filter
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JOURNAL OF COMPUTATIONAL PHYSICS 2022年 471卷
作者: Moldovan, G. Lehnasch, G. Cordier, L. Meldi, M. Univ Poitiers Inst Pprime CNRS ISAEENSMA 11 Bd Marie & Pierre CurieSite FuturoscopeTSA 41 F-86073 Poitiers 9 France
Essential features of the multigrid Ensemble Kalman Filter (Moldovan et al. (2021) [24]) recently proposed for Data Assimilation of fluid flows are investigated and assessed in this article. The analysis is focused on... 详细信息
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Application of Helmholtz/Hodge Decomposition to Finite Element Methods for Two-Dimensional Maxwell's Equations
Application of Helmholtz/Hodge Decomposition to Finite Eleme...
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作者: Nan, Zhe Louisiana State University
学位级别:博士
In this work we apply the two-dimensional Helmholtz/Hodge decomposition to develop new finite element schemes for two-dimensional Maxwell's equations. We begin with the introduction of Maxwell's equations and ... 详细信息
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Automatic coarsening of three dimensional anisotropic unstructured meshes for multigrid applications
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APPLIED MATHEMATICS AND COMPUTATION 2012年 第21期218卷 10500-10519页
作者: Mesri, Youssef Guillard, Herve Coupez, Thierry IFP Energies Nouvelles F-92852 Rueil Malmaison France Inria F-06902 Sophia Antipolis France Univ Nice Sophia Antipolis Lab Jean Akexandre Dieudonne F-06108 Nice France CNRS UMR 7635 Ecole Mines Paris CEMEF F-06904 Sophia Antipolis France
This paper describes an algorithm designed for the automatic coarsening of three-dimensional unstructured simplicial meshes. This algorithm can handle very anisotropic meshes like the ones typically used to capture th... 详细信息
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HP-multigrid as Smoother algorithm for higher order discontinuous Galerkin discretizations of advection dominated flows. Part II: Optimization of the Runge-Kutta smoother
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JOURNAL OF COMPUTATIONAL PHYSICS 2012年 第22期231卷 7564-7583页
作者: van der Vegt, J. J. W. Rhebergen, S. Univ Twente Dept Appl Math NL-7500 AE Enschede Netherlands Univ Minnesota Sch Math Minneapolis MN 55455 USA
Using a detailed multilevel analysis of the complete hp-multigrid as Smoother algorithm accurate predictions are obtained of the spectral radius and operator norms of the multi-grid error transformation operator. This... 详细信息
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Reliable performance prediction for multigrid software on distributed memory systems
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ADVANCES IN ENGINEERING SOFTWARE 2011年 第5期42卷 247-258页
作者: Romanazzi, Giuseppe Jimack, Peter K. Goodyer, Christopher E. Univ Coimbra Dept Matemat CMUC P-3001454 Coimbra Portugal Univ Leeds Sch Comp Leeds LS2 9JT W Yorkshire England
We propose a model for describing and predicting the parallel performance of a broad class of parallel numerical software on distributed memory architectures. The purpose of this model is to allow reliable predictions... 详细信息
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multigrid methods for Maxwell's equations
Multigrid methods for Maxwell's equations
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作者: Cui, Jintao Louisiana State University
学位级别:博士
In this work we study finite element methods for two-dimensional Maxwell's equations and their solutions by multigrid algorithms. We begin with a brief survey of finite element methods for Maxwell's equations.... 详细信息
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