Creating a Scoring System with an Armband Wearable Device for Table Tennis Forehand Loop Training: Combined Use of the Principal Component Analysis and Artificial Neural Network. - Wen-Lan Wu; Jing-Min Liang; Chien-Fei Chen; Kuei-Lan Tsai; Nian-Shing Chen; Kuo-Chin Lin; Ing-Jer Huang (Sensors, 2021)