electrocardiogram machine learning 6 EEG 4 History of engineering & technology 4 deep learning 4 feature extraction 4 heart rate variability 4 IMU 3 Technology: general issues 3 accelerometers 3 artificial intelligence 3 convolutional neural network 3 feature selection 3 gait analysis 3 healthcare 3 heart rate 3 human activity recognition 3 transfer learning 3 wearable sensors 3 Humanities 2 IoT 2 MIMU 2 Social interaction 2 accelerometer 2 aging 2 body sensor network 2 calibration 2 center of pressure 2 classification 2 convolutional neural networks 2