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. 2020 Nov 9;11:587057. doi: 10.3389/fphys.2020.587057

TABLE 3.

Summary of unique extracted input features.

Feature n Description
Primary feature vector 4 A vector consisting of: - Normalized Aggregated Left VGRF - Normalized Aggregated Right VGRF - FMV for sensor 3 - FMV for sensor 7
Stance times 2 Left and Right Stance Times
Stride times 2 Left and Right Stride Times
Swing times 2 Left and Right Swing Times
Swing ratio 2 Left and Right Swing Ratios
Swing ratio 2 Left and Right Stance Ratios
Swing-stance ratio 2 Left and Right Swing-Stance Ratios
Initial contact force 2 Right and Left Maximum Initial Contact Force
Terminal contact force 2 Right and Left Maximum Terminal Contact Force
Statistical covariance 4 Covariance (CoV) of each of the Feature Vector Elements: - CoV(Normalized Aggregated Left VGRF) - CoV(Normalized Aggregated Right VGRF) - CoV(FMV for sensor 3) - CoV(FMV for sensor 7)
Statistical mean 4 Mean of each of the Feature Vector Elements: - mean(Normalized Aggregated Left VGRF) - mean(Normalized Aggregated Right VGRF) - mean(FMV for sensor 3) - mean(FMV for sensor 7)
Standard deviation 4 Mean of each of the Feature Vector Elements: - std(Normalized Aggregated Left VGRF) - std(Normalized Aggregated Right VGRF) - std(FMV for sensor 3) - std(FMV for sensor 7)
Step distance 1 Average Step Distance of the Subjects
Asymmetry index 1 Asymmetry Index of the Stride between left and right feet
Total Features 34