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. 2018 Apr 5;18(4):1102. doi: 10.3390/s18041102

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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ROC curves of the proposed detection ratio using the WT method for COP and its velocity: (A) ML direction and (B) AP direction. EO-R_{COP_ML}: the detection ratio using COP data in the ML direction under the eyes open condition, EC-R_{COP_ML}: the detection ratio using COP data in the ML direction under the eyes closed condition, EO-R_{VCOP_ML}: the detection ratio using COP velocity data in the ML direction under the eyes open condition, EC-R_{VCOP_ML}: the detection ratio using COP velocity data in the ML direction under the eyes closed condition, EO-R_{COP_AP}: the detection ratio using COP data in the AP direction under the eyes open condition, EC-R_{COP_AP}: the detection ratio using COP data in the AP direction under the eyes closed condition, EO-R_{VCOP_AP}: the detection ratio using COP velocity data in the AP direction under the eyes open condition, and EC-R_{VCOP_AP}: the detection ratio using COP velocity data in the AP direction under the eyes closed condition.