Analysis of the complex moving least squares approximation and the associated element-free Galerkin method

Analysis of the complex moving least squares approximation and the associated element-free Galerkin method
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复移动最小二乘近似及相关无单元伽辽金法分析

DOI:
10.1016/j.apm.2017.03.019
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发表时间:
2017-07
影响因子:
5
通讯作者:
Shuling Li
Shuling Li
中科院分区:
工程技术2区
文献类型:
--
作者:
Xiaolin Li;Shuling Li

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复移动最小二乘逼近是无网格方法中构造逼近函数的有效方法。本文首先分析了近似值的性质、稳定性和误差。为了克服固有的不稳定性,还开发并分析了稳定的近似值。复数无单元伽辽金法是一种与复数移动最小二乘近似相结合的无网格方法。然后给出了复杂无单元伽辽金方法在线性和非线性瞬态问题中的应用。从理论上推导了复数无单元伽辽金法的误差估计。最后提供了涉及函数拟合和孤子的数值例子,以显示所提出方法的准确性和效率。
The complex moving least squares approximation is an efficient method to construct approximation functions in meshless methods. This paper begins by analyzing properties, stability and error of the approximation. To overcome the inherent instability, a stabilized approximation is also developed and analyzed. The complex element-free Galerkin method is a meshless method combined with the use of the complex moving least squares approximation. Application of the complex element-free Galerkin method to linear and nonlinear time-dependent problems is then given. Error estimates of the complex element-free Galerkin method are derived theoretically. Numerical examples involving function fitting and solitons are finally provided to show the accuracy and efficiency of the proposed methods.
非线性正弦-Gordon和广义sinh-Gordon方程的无元伽辽金法分析与应用
DOI: 10.1016/j.camwa.2016.03.007
发表时间: 2016-04
影响因子: 2.9
作者:
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