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arXiv 1805.03052math.NAcs.NA
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利用插值法求解Van der Pol方程的数值解

On the numerical solution of the Van der Pol equation using collocation

The Open University(开放大学)

J Hamish M Darbyshire

AI总结:

本文介绍了用插值法求解非线性二阶常微分方程的理论,针对Van der Pol方程的初始条件和参数μ的变化,提出改进的分段插值法以降低计算成本。

摘要:

本文介绍了用插值法近似非线性二阶常微分方程解的理论。重点讨论了该方法在Van der Pol方程中的应用,特别是初始条件和参数μ的变化情况。原插值法因计算成本高而不适用于生成这些近似解,尤其是当方程的刚性随参数μ增加时。提出了一种改进的分段插值法,利用初始值问题的特定结构和收敛性,理论上和数值上证明其能以更优成本生成等效近似解。进一步研究建议比较分段方法与其他传统方法(如Runge-Kutta族)的性能,并测试该方法以确定其在近似具有初始条件的二阶ODE中的完整实用性和竞争力。

英文摘要:

This study introduces the reader to the theory of approximating the solution(s) of a non-linear, second order, ordinary differential equation (ODE) with piecewise polynomial functions by using the collocation method. It then focuses on the application of the method to generate collocation approximations for the Van der Pol equation with initial conditions and with varying equation parameter, μ. It is shown that the collocation method in its original form is impractical for generating these approximations due to the numerical costs of producing such an approximation, particularly as the stiffness of the equation increases with parameter, μ. An adaptation to the method, termed segmented collocation, is proposed, reliant upon on the specific structure and convergence for initial value problems, and shown theoretically and numerically to be capable of generating equivalent approximations for much superior costs. Further study is proposed; to compare the segmented method to other numerical methods traditionally employed with equations of this type such as the Runge-Kutta family; and to develop and test the method in order to ascertain its complete usefulness and competitive standing in the context of approximating second order, ODEs with initial conditions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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