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Article Type: Research-Article
J Biomech Eng. December 2022, 144(12): 121007.
Paper No: BIO-22-1056
Published Online: September 20, 2022
Includes: Supplementary data
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IMU placement on the thigh and shank used for data acquisition. Positive  x...
Published Online: September 20, 2022
Fig. 1 IMU placement on the thigh and shank used for data acquisition. Positive x -axis points proximally, positive y -axis points anteriorly, and positive z -axis points medially. More
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Flowchart describing the feature extraction (box 1, thick red outline), fea...
Published Online: September 20, 2022
Fig. 2 Flowchart describing the feature extraction (box 1, thick red outline), feature selection and hyperparameter tuning (box 2, thick red outline), and model evaluation (box 3, thick red outline) procedures. Flowchart boxes with thin black outlines indicate processes conducted as part of the br... More
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Mean ± standard deviation of PPCS ( X  symbol with error lines) and accurac...
Published Online: September 20, 2022
Fig. 3 Mean ± standard deviation of PPCS ( X symbol with error lines) and accuracy (bars with error lines) across all folds for the seven initial models tested ( a ) and for the five posthoc models tested ( b ), with the initial and posthoc models separated by a vertical red dashed line. For the ... More
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Mean ± standard deviation loss ( a ) and accuracy ( b ) curves for the LSTM...
Published Online: September 20, 2022
Fig. 4 Mean ± standard deviation loss ( a ) and accuracy ( b ) curves for the LSTM model that used IMU signals as features (model E in Table 1 ). In ( a ), the blue solid line indicates the mean loss for each epoch. In ( b ), the orange solid line indicates the mean accuracy for each epoch. In bo... More
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Ground truth (blue, thick lines) and predictions (orange, thin lines) for e...
Published Online: September 20, 2022
Fig. 5 Ground truth (blue, thick lines) and predictions (orange, thin lines) for exemplar strides for level-ground walking ( a ), stair ascent ( b ), and stair ascent ( c ) for the posthoc model that used inertial measurement unit signals as features and median filtered predictions (model I in Tab... More
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