干草叉分叉
鞍结分岔
分叉理论的生物学应用
分叉
参数空间
背景(考古学)
博格达诺夫-塔肯分岔
准周期函数
弹簧(装置)
振荡(细胞信号)
数学
强迫(数学)
尖点(奇点)
分岔图
突变理论
统计物理学
物理
数学分析
非线性系统
几何学
热力学
工程类
地质学
化学
古生物学
生物化学
岩土工程
量子力学
标识
DOI:10.1016/j.mechrescom.2022.103967
摘要
We analyse a simple mass–spring system as an accessible context for showcasing how continuous changes to system parameters can lead to critical transitions ('tipping points'). Two kinds of transition are explored in particular: saddle–node bifurcations, due to changes in a mass forcing parameter a; and pitchfork bifurcations, due to changes in a spring separation parameter X. Both types of bifurcation arise as features of a cusp catastrophe characterised in X−a parameter space by the critical curve X2/3+a2/3=1, leading to hysteresis cycles, as described by C. Ong (2021), and non-reversible pitchfork catastrophes, which are discussed here for the first time. In each case we demonstrate critical slowing down of the oscillation period τ→∞ as the system approaches bifurcation.
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