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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Two families of $n$-rectangle nonconforming finite elements for sixth-order elliptic equations
六阶椭圆方程 矩形 有限元族
2023/4/13
We propose two families of nonconforming finite elements on $n$-rectangle meshes of any dimension to solve the sixth-order elliptic equations. The unisolvent property and the approximation ability of ...
第19届有限元素法流体力学国际会议（19th International Conference on Finite Elements in Flow Problems）
第19届 有限元素法流体力学 国际会议
2017/1/10
The Finite Elements in Flow (FEF) Problems Conference has a rich history that closely parallels the development and maturation of the finite element method and its application to computational fluid d...
Digital photogrammetry, GPR and finite elements in heritage documentation: geometry and structural damages
Close Range Digital Photogrammetry GPR Structural analysis Structural Damages Surveying Cultural Heritage
2015/8/24
This paper shows a multidisciplinary approach to heritage documentation involving Close Range Photogrammetry and Ground Penetrating Radar techniques, as well as the development of finite elements base...
A sweeping preconditioner for time-harmonic Maxwell’s equations with finite elements
Maxwell’s equations Frequency domain Finite element methods Preconditioners Fast solvers Perfectly matched layers Block LDLt factorization High-frequency waves
2015/7/14
This paper is concerned with preconditioning the stiffness matrix resulting from finite element discretizations of Maxwell’s equations in the high frequency regime. The moving PML sweeping preconditio...
Stabilized mixed finite elements for deformable porous media with double porosity
Coupled problem Double porosity Effective stress Mixture theory Stabilized finite elements Twofold saddle point problem
2015/7/1
Natural geomaterials such as fissured rocks and aggregated soils often exhibit a pore size distribution with two dominant pore scales, usually termed macropores and micropores. High-fidelity descripti...
Stabilized low-order finite elements for frictional contact with the extended finite element method
Extended finite element Frictional contact Lagrange multipliers Penalty method Stabilized methods
2015/7/1
Contact problem suffers from a numerical instability similar to that encountered in incompressible elasticity, in which the normal contact pressure exhibits spurious oscillation. This oscillation does...
Embedded strong discontinuity finite elements for fractured geomaterials with variable friction
bifurcation rate- and state-friction strong discontinuity enhanced strain finite element
2015/7/1
The strong discontinuity approach to modelling strain localization, combined with an enhanced strain element, has been used for more than a decade to model strain localization in materials including g...
Stabilized low-order finite elements for coupled solid-deformation/fluid-diffusion and their application to fault zone transients
Coupled analysis Fault zone Fluid flow Mixed formulation Stabilized finite elements
2015/7/1
Finite element simulations of coupled solid-deformation/fluid-diffusion occurring in earthquake fault zones often require high-fidelity descriptions of the spatial and temporal variations of excess po...
Filtering of Laser Scanning Data in Forest Areas using Finite Elements
Laser scanning Finite elements TIN robust adjustment
2015/5/26
During the last decade laser scanning turned out to be one of the most promising techniques in photogrammetry. Some
photogrammetrists even say that laser scanning has caused a paradigm change in pho...
HIFI - A Minicomputer Program Package for Height Interpolation by Finite Elements
HIFI A Minicomputer Program Package Height Interpolation Finite Elements
2015/1/4
HIFI - A Minicomputer Program Package for Height Interpolation by Finite Elements.
Two remarks on rectangular mixed finite elements for elasticity
Two remarks rectangular finite elements elasticity
2011/1/19
The lowest order nonconforming rectangular element in three dimen-sions involves 54 degrees of freedom for the stress and 12 degrees of freedom for the displacement.
Dual Raviart-Thomas mixed finite elements
finite volumes mixed finite elements Petrov-Galerkin variational formulation
2011/1/19
For an elliptic problem with two space dimensions, we propose to formulate the finite volume method with the help of Petrov-Galerkin mixed finite elementsthat are based on the building of a dual Ravia...
Tsunami waveform inversion by numerical finite-elements Green’s functions
Tsunami waveform inversion numerical finite-elements Green’s functions
2009/12/9
The inversion of tide-gage records to determine the initial state results in the least square inversion of a rectangular system of linear equations. When the inversions are unconstrained, we found tha...
Finite elements method (FEM) simulation based prediction of deformation and temperature at rolling of tubes on a pilgrim mill
FEM temperature tube rolling
2009/10/23
3D - FEM simulation was used as an efficient tool for description of stress-deformation thermal field at rolling of tubes on a pilgrim mill. The monitored objectives comprised also behaviour of workin...
DETERMINATION OF DIAMETRAL ERROR USING FINITE ELEMENTS AND EXPERIMENTAL METHOD
turning diametral error laser distance sensor
2009/10/23
This study concerns experimental and numerical analysis on a one-sided bound workpiece on the lathe machine.
Cutting force creates deflection on workpiece while turning process is on. Deflection quan...