Table 3 Model optimal parameter settings.

From: Remaining useful life prognosis of turbofan engines based on deep feature extraction and fusion

imSSAE parameters

Value

imESN parameters

Value

Sparsity parameter \(\rho\)

0.05

Reservoir node \(m\)

300

Learning rate

0.01

Spectral radius \(\rho (\hat{W})\)

0.9

Batch size

64

Sparsity SD

0.05

Epoch

50

Leakage rate \(\lambda\)

0.23

Dropout

0.2

Scaling factor IS

0.4

Network structure

14-8-4-1

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