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

Table 6

Comparison of computing time of eight models in degradation tendency prediction.

Models	CEEMDAN-PE-IGMMW	EMD-PE-IGMMW	CEEMDAN-IGMMW	IGMMW	ELM	SVR	ARIMA	BPNN
Time (s)	2.33	2.65	2.89	2.01	3.23	14.57	10.20	9.32