Predicting Remaining Useful Life Based on Hilbert–Huang Entropy with Degradation Model

Table 1

Distribution and parameter estimation.

Symbol	Before bootstrap sampling	After bootstrap sampling
DDT	μ = 2.9622	μ = 2.97447
	CI: [2.28619, 3.6382]	CI: [2.9561, 2.99284]
	σ = 0.644163	σ = 0.229118
	CI: [0.402092, 1.57988]	CI: [0.216847, 0.242873]
FT	μ = 5.87238	μ = 5.88007
	CI: [4.88223, 6.86253]	CI: [5.85236, 5.90777]
	σ = 0.943506	σ = 0.345575
	CI: [0.588944, 2.31406]	CI: [0.327067, 0.366321]

CI: confidence interval.