Based on the correlation principle, an algorithm to decomposite the damped free vibration signals of a two degrees of freedom system with close natural frequencies is put forward.

摘单一频率成分自由衰振动响应信号相关性原理，提出了一种频率密集成分两耦合振子自由衰振动响应信号解耦算法。

This homotopic method is an approximate analysis method, which can be more used for analyzing other behavior of the sea surface temperature anomaly of the atmosphere-ocean oscillator model.

本同伦方法是近似解析方法，它能进一步分析海-气振子海表温度异常性态。