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求解变阶时间分数阶初边值问题的显式格式。

Explicit scheme for solving variable-order time-fractional initial boundary value problems.

作者信息

Kanwal Asia, Boulaaras Salah, Shafqat Ramsha, Taufeeq Bilal, Ur Rahman Mati

机构信息

School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, Sichuan, People's Republic of China.

Department of Mathematics, College of Science, Qassim University, 51452, Buraydah, Saudi Arabia.

出版信息

Sci Rep. 2024 Mar 5;14(1):5396. doi: 10.1038/s41598-024-55943-4.

Abstract

The creation of an explicit finite difference scheme with the express purpose of resolving initial boundary value issues with linear and semi-linear variable-order temporal fractional properties is presented in this study. The rationale behind the utilization of the Caputo derivative in this scheme stems from its known importance in fractional calculus, an area of study that has attracted significant interest in the mathematical sciences and physics. Because of its special capacity to accurately represent physical memory and inheritance, the Caputo derivative is a relevant and appropriate option for representing the fractional features present in the issues this study attempts to address. Moreover, a detailed Fourier analysis of the explicit finite difference scheme's stability is shown, demonstrating its conditional stability. Finally, certain numerical example solutions are reviewed and MATLAB-based graphic presentations are made.

摘要

本研究提出了一种显式有限差分格式,其明确目的是解决具有线性和半线性变阶时间分数性质的初边值问题。该格式中使用卡普托导数的基本原理源于其在分数阶微积分中的已知重要性,分数阶微积分是数学科学和物理学领域中引起广泛关注的一个研究领域。由于卡普托导数具有准确表示物理记忆和遗传性的特殊能力,因此它是表示本研究试图解决的问题中存在的分数特征的一个相关且合适的选择。此外,还给出了显式有限差分格式稳定性的详细傅里叶分析,证明了其条件稳定性。最后,回顾了一些数值示例解并给出了基于MATLAB的图形表示。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1586/10914797/8fece2673f7f/41598_2024_55943_Fig1_HTML.jpg

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