On the dynamics of ocean ambient noise: Two decades later
On the dynamics of ocean ambient noise: Two decades later
复制标题
海洋环境噪声的动态：二十年后
DOI：
10.1063/1.4932561
复制
发表时间：
2015-10-01
期刊：
影响因子：
2.9
通讯作者：
Yang, Kunde
中科院分区：
文献类型：
--
作者：
Siddagangaiah, Shashidhar;Li, Yaan;Yang, Kunde
二十年前，环境噪声表现出低维混沌行为。近年来，非线性科学的新技术可以有效地检测噪声时间序列中的潜在动力学。本文采用相关维数、李雅普诺夫指数、非线性预测和基于熵的方法等多种非线性技术研究了环境噪声中存在的低维确定性动力学。不同方法的一致解释表明，环境噪声可以最好地建模为非线性随机动力学，从而拒绝了低维混沌行为的假设。本研究使用的环境噪声数据是在南海测量的60 s的持续时间。(C) 2015作者。
Two decades ago, it was shown that ambient noise exhibits low dimensional chaotic behavior. Recent new techniques in nonlinear science can effectively detect the underlying dynamics in noisy time series. In this paper, the presence of low dimensional deterministic dynamics in ambient noise is investigated using diverse nonlinear techniques, including correlation dimension, Lyapunov exponent, nonlinear prediction, and entropy based methods. The consistent interpretation of different methods demonstrates that ambient noise can be best modeled as nonlinear stochastic dynamics, thus rejecting the hypothesis of low dimensional chaotic behavior. The ambient noise data utilized in this study are of duration 60 s measured at South China Sea. (C) 2015 Author(s).