简单的时周期延迟可支持复杂的动态变化

IF 1.9 4区数学 Q2 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

International Journal of Bifurcation and Chaos Pub Date : 2023-12-11 DOI:10.1142/s0218127423501754

Mingshan Li, Naiming Xie, Xiaoliang Zhou

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引用次数: 0

摘要

本文研究了由具有简单时周期延迟的微分方程导出的映射的复杂动力学。首先，我们计算了该映射在退化定点处 1:1 共振的截断法线形式，并通过皮卡尔迭代得到了该映射的近似系统。通过分析近似系统，我们发现映射在退化定点处会发生 1:1 共振。其次，确定了退化定点的定性和稳定性，为理解具有简单时周期延迟的微分方程的动态提供了新的视角。然而，近似系统并不具有第 2 维 Bogdanov-Takens 奇点的 versal 展开。这些现象表明，简单的时周期延迟可以支持复杂的动力学。最后，我们进行了数值模拟来验证分析结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Simple Time-Periodic Delay Can Support Complex Dynamics

In this paper, we investigate the complex dynamics of a mapping derived from a differential equation with simple time-periodic delay. Firstly, we calculate the truncated normal form of 1:1 resonance of the mapping at a degenerate fixed point and obtain an approximating system of the mapping by using Picard iteration. By analyzing the approximate system, we find that the mapping will undergo a 1:1 resonance at the degenerate fixed point. Secondly, the qualitative property and the stability of the degenerate fixed point are determined, which provide a new view to understand the dynamic of differential equation with simple time-periodic delay. However, the approximate system does not have the versal unfolding of the Bogdanov–Takens singularity of codimension 2. These phenomena show that simple time-periodic delay can support complex dynamics. Finally, a numerical simulation is carried out to verify the analytic results.

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来源期刊

International Journal of Bifurcation and Chaos 数学-数学跨学科应用

CiteScore

4.10

自引率

13.60%

发文量

237

审稿时长

2-4 weeks

期刊介绍： The International Journal of Bifurcation and Chaos is widely regarded as a leading journal in the exciting fields of chaos theory and nonlinear science. Represented by an international editorial board comprising top researchers from a wide variety of disciplines, it is setting high standards in scientific and production quality. The journal has been reputedly acclaimed by the scientific community around the world, and has featured many important papers by leading researchers from various areas of applied sciences and engineering. The discipline of chaos theory has created a universal paradigm, a scientific parlance, and a mathematical tool for grappling with complex dynamical phenomena. In every field of applied sciences (astronomy, atmospheric sciences, biology, chemistry, economics, geophysics, life and medical sciences, physics, social sciences, ecology, etc.) and engineering (aerospace, chemical, electronic, civil, computer, information, mechanical, software, telecommunication, etc.), the local and global manifestations of chaos and bifurcation have burst forth in an unprecedented universality, linking scientists heretofore unfamiliar with one another''s fields, and offering an opportunity to reshape our grasp of reality.