adult human 5 female 4 male 4 Article 3 Humans 3 human experiment 3 machine learning 3 mathematical model 3 signal noise ratio 3 Electrocardiography 2 Wearable Electronic Devices 2 Wearable sensors 2 article 2 artificial neural network 2 breathing 2 electrocardiogram 2 electrocardiography 2 electroencephalography 2 electronic device 2 nerve cell network 2 normal human 2 physical activity 2 random forest 2 signal processing 2 Accurate estimation 1 Adult 1 Asthma 1 Atmospheric pressure 1 Biomarkers 1