A High-Precision Fatigue Detecting Method for Air Traffic Controllers Based on Revised Fractal Dimension Feature

Figure 13

Test results for support vector machines with HVSF and RBF kernels. The red asterisk in the figure indicates the true category of speech samples, while the blue circle indicates the predicted category. The two markers will overlap when the predicted and real categories are the same, otherwise they will be separated. Vertical coordinates of 0 and 1 indicate that the speech sample has been labelled as normal and fatigue, respectively.