Table 9 Convergence results of different algorithms based on PHM2010.

From: Improved sand cat swarm optimization algorithm assisted GraphSAGE-GRU for remaining useful life of engine

Algorithms

R2

RMSE

SMAPE

GraphSAGE-GRU

0.9806

11.8182

0.0596

CMGRU

0.9783

12.5106

0.0649

CNN

0.9691

14.9208

0.0769

GRU

0.9628

16.3707

0.0875

CNN-GRU

0.9719

14.2174

0.0739

Transformer

0.9678

15.2076

0.0815

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