Multistep Degradation Tendency Prediction for Aircraft Engines Based on CEEMDAN Permutation Entropy and Improved Grey–Markov Model

Table 3

PE values of the CEEMDAN decomposed IMFs.

	IMF1	IMF2	IMF3	IMF4	IMF5	IMF6	IMF7	IMF8	r0
PE	0.895	0687	0.489	0.388	0.262	0.188	0.167	0.166	0