盆地作为时间延迟系统中分叉的指标
Juan P Tarigo1, Cecilia Stari2, Cristina Masoller3
1Instituto de Física, Facultad de Ciencias, Universidad de la República, Igua 4225, 11400 Montevideo, Uruguay.
Chaos (Woodbury, N.Y.)
|May 8, 2024
概括
盆地量化了多稳定系统中的可预测性. 这项研究将其应用扩展到时间延迟系统,揭示了其在捕获吸引子特性和检测霍夫分叉的有效性,但不是叉分叉.
科学领域:
- 动态系统理论 动态系统理论
- 非线性动力学是一种非线性动力学.
- 混沌理论 混沌理论
背景情况:
- 盆地测量了多个吸引子的多稳定系统中的状态可预测性.
- 以前的盆地的应用不包括时间延迟系统,这些系统具有无限维的相位空间.
- 时间延迟系统在各种科学和工程领域都很常见.
研究的目的:
- 在一个简单的时间延迟动态系统中研究盆地的适用性和实用性.
- 为了确定盆地能否在有时间延迟的系统中描述吸引力盆地.
- 评估盆地的能力,以检测在这样的系统的分叉.
主要方法:
- 分析了具有线性反的简单的二位式时间延迟系统.
- 盆地被计算为时间区间[-τ,0]上的初始条件的函数.
- 检查了系统在Hopf和pitchfork分叉附近的行为.
主要成果:
- 盆地成功地捕获了盆地的关键性质,即对共存的吸引器的吸引力.
- 盆地表示接近霍夫分叉,显示其发生前的最大值.
- 盆地力未能检测到附近的叉分叉,因为吸引子盆地保持不变.
结论:
- 盆地是分析时间延迟系统的长期可预测性的一个有价值的工具.
- 该措施有效地反映了在特定类型的分叉 (Hopf) 附近的吸引器结构的变化.
- 进一步的研究可以在更复杂的时间延迟系统中探索盆地.
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