Page 88 - 摩擦学学报2025年第8期

1186 摩擦学学报（中英文） 第 45 卷

1.0 1.0

0.8 0.8
0.6 0.6
F 1 F 2
0.4 0.4
0.2 0.2

0.0 0.0
0 50 100 150 200 250 0 50 100 150 200 250
Sample sequence number Sample sequence number
(a) F 1 (b) F 2

1.0 1.0

0.8 0.8
0.6 0.6
F 3 F 4
0.4 0.4

0.2 0.2
0.0 0.0
0 50 100 150 200 250 0 50 100 150 200 250
Sample sequence number Sample sequence number
(c) F 3 (d) F 4

1.0 1.0
0.8 0.8
0.6 0.6
F 5 F 6
0.4 0.4
0.2 0.2
0.0 0.0

0 50 100 150 200 250 0 50 100 150 200 250
Sample sequence number Sample sequence number
(e) F 5 (f) F 6

1.0
0.8

0.6
F 7
0.4

0.2
0.0
0 50 100 150 200 250
Sample sequence number

(g) F 7
Fig. 11 Components of signal characteristic value after dimensionality reduction
图 11 信号特征值降维后成分