Spatial Information Entropy and Its Application in the Degradation State Identification of Hydraulic Pump

Table 3

Clustering centers of sliding boot wear feature set.

Degradation features	Wearing degree (mm)
	Normal	0.1	0.16	0.26	0.48
PE	0.9975	0.9932	0.9873	0.9826	0.9469
SIE	0.2908	0.2331	0.1948	0.1556	0.1249