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Peridynamic least squares minimization

机译:王动脉最小二乘最小化

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摘要

This study presents the peridynamic approximation of a field variable and its temporal and spatial derivatives based on least squares minimization Such capability permits the conversion of local form of differentiation to its nonlocal analytical integral form. It enables the analysis of discrete and scattered data for numerical differentiation and approximation of the field variable without employing any special techniques. Also, it enables the numerical solution of differential field equations with single and multiple variables in a computational domain of either uniform or nonuniform discretization. The implicit solution to the discrete form of the differential equations can be achieved by employing standard techniques for solving sparse non-symmetric systems. The accuracy of this approach is demonstrated by considering numerical differentiation of discrete data, and solving ordinary and partial differential equations with particular characteristics. (C) 2018 Elsevier B.V. All rights reserved.
机译:该研究呈现了场变量的白动力学近似,并且其时间和空间衍生物基于最小平方最小化,这些能力允许将局部分化的局部形式转化为其非局部分析整体形式。它能够分析用于在不采用任何特殊技术的情况下分析现场变化的数值分化和近似。此外,它能够在均匀或非均匀离散化的计算领域中具有单个和多个变量的差分场方程的数值解。通过采用用于求解稀疏非对称系统的标准技术,可以实现对微分方程的离散形式的隐式解决方案。通过考虑离散数据的数值分化,并解决具有特定特征的普通和部分微分方程来证明这种方法的准确性。 (c)2018年elestvier b.v.保留所有权利。

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