Results 21 to 30 of about 12,853 (184)
Algebraic Multi-Grid Based Multi-Focus Image Fusion Using Watershed Algorithm
IEEE Access, 2018 This paper proposes a new multi-focus image fusion method named AMGW, and it is based on algebraic multi-grid (AMG) algorithm and watershed segmentation method.
Ying Huang +3 more
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Multigrid optimization for space-time discontinuous Galerkin discretizations of advection dominated flows [PDF]
, 2010 The goal of this research is to optimize multigrid methods for higher order accurate space-time discontinuous Galerkin discretizations. The main analysis tool is discrete Fourier analysis of two- and three-level multigrid algorithms.
A. Brandt +7 more
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The hp-version of the least-squares collocation method with integral collocation for solving a biharmonic equation [PDF]
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2022 A new algorithm for the numerical solution of the biharmonic equation is developed. It is based on the first implemented hp-version of the least-squares collocation method (hp-LSCM) with integral collocations for a fourth-order elliptic equation in ...
Vasily P. Shapeev +2 more
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A Root-Node--Based Algebraic Multigrid Method [PDF]
SIAM Journal on Scientific Computing, 2017 This paper provides a unified and detailed presentation of root-node style algebraic multigrid (AMG). Algebraic multigrid is a popular and effective iterative method for solving large, sparse linear systems that arise from discretizing partial differential equations. However, while AMG is designed for symmetric positive definite matrices (SPD), certain
Manteuffel, Thomas A. +3 more
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Remote Sensing, 2016 The algebraic multigrid (AMG) method is used to solve linear systems of equations on a series of progressively coarser grids and has recently attracted significant attention for image segmentation due to its high efficiency and robustness. In this paper,
Haiwei Song, Yi Wang
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Uniciencia, 2020 This paper presents detailed aspects regarding the implementation of the Finite Element Method (FEM) to solve a Poisson’s equation with homogeneous boundary conditions.
Helen Guillén-Oviedo +3 more
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IEEE Access, 2022 The fast solution of three-dimensional eddy current problems is still an open problem, especially when real-size finite element models with millions of degrees of freedom are considered.
Federico Moro +4 more
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A fully-coupled discontinuous Galerkin method for two-phase flow in porous media with discontinuous capillary pressure [PDF]
, 2013 In this paper we formulate and test numerically a fully-coupled discontinuous Galerkin (DG) method for incompressible two-phase flow with discontinuous capillary pressure. The spatial discretization uses the symmetric interior penalty DG formulation with
Bastian, Peter
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Algebraic analysis of aggregation-based multigrid
Numerical Linear Algebra with Applications, 2010 Numerical solution of a system \(Ax=b\) is considered, where \(A\) is large, sparse, symmetric and positive definite. A two-grid scheme using an agglomeration of unknowns into pairwise disjoint sets is studied. In spite of the classical multigrid theory, the numbers of pre- and post-smoothing steps can be different.
Napov, Artem, Notay, Yvan
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A new multilevel smoothing method for wavelet-based algebraic multigrid poisson problem solver
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsIn contrast to the standard algebraic multigrid, the Wavelet-based Algebraic Multigrid method relies more strongly on the smoothing method because the coarse spaces are chosen a priori. So, it is very important to develop new smoother methods, especially
Fabio Henrique Pereira +2 more
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