Noise-induced transitions in human postural sway
Noise-induced transitions in human postural sway
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DOI：
10.1103/physreve.54.6681
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发表时间：
1996-12-01
影响因子：
2.4
通讯作者：
Milton, JG
中科院分区：
文献类型：
--
作者：
Eurich, CW;Milton, JG
具有多个标度区域的相关函数发生在安静站立期间的压力中心的波动的描述。姿势摇摆被建模为倒立摆与延迟反馈构造，使得超过空间阈值的恒定恢复力的偏差是从事。在没有噪声的情况下，两个稳定的极限环共存。相关函数取决于增加的噪声强度：在中间噪声水平三个缩放区域出现，而只有两个发生高噪声水平。我们的观察结果表明，多尺度区域的相关函数反映了噪声诱导的跃迁的非线性动力系统。
Correlation functions with multiple scaling regions occur in the description of the fluctuations in the center of pressure during quiet standing. Postural sway is modeled as an inverted pendulum with a delayed feedback constructed such that for deviations beyond a spatial threshold a constant restoring force is engaged. In the absence of noise, two stable limit cycles coexist. The correlation function depends on the added noise intensity: at intermediate noise levels three scaling regions appear whereas only two occur for high noise levels. Our observations suggest that correlation functions with multiple scaling regions reflect noise-induced transitions in bistable dynamical systems.