Because the dynamical change in the HRVsignal is very slow, we generalize the dynamical description of autonomous systems to the case of nonautonomous systems.

• 但这种变化是缓慢的，本文从确定 性动力学模型的角度出发，讨论了相对于这种系统结构缓变的非平稳性及其处 理方法。