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在Togashi-Kaneko模型中随机可比增长和衰退
Jeremy R Worsfold1,2, Richard G Morris1,2,3
1UNSW, Sydney, School of Physics, New South Wales 2052, Australia.
Physical review. E
|August 19, 2025
概括
有限系统中的自催化会导致分子噪声诱导的双稳定性. 这项研究表明,物种依赖的出口率导致人口增长和衰减切换,这种现象在模拟和分析模型中观察到.
科学领域:
- 系统生物学 系统生物学
- 理论生物学的理论生物学.
- 计算建模计算建模
背景情况:
- 托加希-卡内科模型解释了由于自催化在有限系统大小的分子度中的噪声诱导的双稳定性.
- 生物系统经常表现出由分子波动和物种相互作用影响的复杂动力学.
研究的目的:
- 调查物种依赖的出口率对分子切换和种群动态的影响.
- 探索随机分子波动和种群大小变化之间的合.
- 开发分析方法来理解这些合动态.
主要方法:
- 托加希-卡内科双状态模型的随机模拟.
- 对于有限系统大小的福克-普朗克方程的数值集成.
- 用零碎决定性的马尔科夫和线性噪声近似的应用.
主要成果:
- 取决于物种的出口率导致人口增长和衰退之间的切换,再加上分子物种的切换.
- 静态分布的分析表达式在特定条件下 (快速随机切换) 得到.
- 这项研究证实了模拟和福克-普朗克方程的结果.
结论:
- 分子物种的随机切换可以驱动非周期性种群大小动态 (增长/衰变).
- 这些发现扩展到其他"选民阶级"模型,包括旋转系统和意见动态.
- 使用的分析技术为研究类似复杂系统提供了一个框架.
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