Fig. 5

The accuracies of different models with box-plot. The mean value ± standard deviation for these models are:\({\text{Acc}}_{\text{GRU}} = 98.82\% \pm 0.46\%\), \({\text{Acc}}_{\text{SVM}} = 87.62\% \pm 1.77\%\), \({\text{Acc}}_{\text{FCN}} = 94.65\% \pm 3.07\%\), \({\text{Acc}}_{\text{LSTM}} = 96.29\% \pm 1.02\%\). Deep features based on GRU model show the highest accuracy on average