By calculating the Euclidian dis-tances of the phase point in phase space, both the phase density and the phase variance are defined and compared with correlation dimension which reflects the chaotic features of nonlinear dynamics system.

• 通过计算相空间状态点间的欧氏距离,定义相对嵌入维数的态密度和态方差,并与反映非线性动力学系统混沌特征的关联维数作比较。