修正欧拉法求解ode初值问题的精度分析

Mohammad Asif Arefin, Nazrul Islam, B. Gain, Mohammad Roknujjaman
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引用次数: 2

摘要

求解常微分方程初值问题的数值方法有很多。这些方法的精度水平和计算时间不尽相同。本文讨论了用修正欧拉法求解不同步长常微分方程并求其精确解的问题。用结果分析表给出了不同步长得到的近似结果。用所提出的方法解决了一些问题,并将近似结果与精确解进行了图形化比较,以便更好地了解该方法的精度水平。估计了每一步的误差,并使用Matlab编程语言和MS Excel图形化表示,这表明如此小的步长可以在较小的计算误差下获得更好的精度。结果表明,当所取步长过小时,该方法适用于得到ode的精确解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Accuracy Analysis for the Solution of Initial Value Problem of ODEs Using Modified Euler Method
There exist numerous numerical methods for solving the initial value problems of ordinary differential equations. The accuracy level and computational time are not the same for all of these methods. In this article, the Modified Euler method has been discussed for solving and finding the accurate solution of Ordinary Differential Equations using different step sizes. Approximate Results obtained by different step sizes are shown using the result analysis table. Some problems are solved by the proposed method then approximated results are shown graphically compare to the exact solution for a better understanding of the accuracy level of this method. Errors are estimated for each step and are represented graphically using Matlab Programming Language and MS Excel, which reveals that so much small step size gives better accuracy with less computational error. It is observed that this method is suitable for obtaining the accurate solution of ODEs when the taken step sizes are too much small.
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