表 3. Test statistics and P-values of COP feature parameters test at P1 across different periods.

P1下各个时期的COP特征参数检验的检验值和P值

对比方式	轨迹移动长度	轨迹包络面积	左右动摇轨迹长	前后动摇轨迹长
Q1 vs Q2	W = 12，P = 0.034	W = 13，P = 0.042	W = 26，P = 0.339	W = 13，P = 0.042
Q1 vs Q3	W = 11，P = 0.027	W = 11，P = 0.027	W = 23，P = 0.233	W = 9，P = 0.016
Q2 vs Q3	W = 26，P = 0.339	W = 19，P = 0.129	W = 29，P = 0.469	W = 17，P = 0.092