human action recognition artificial intelligence 4 machine learning 4 Action recognition 3 Classification (of information) 3 Data augmentation 3 Datapoints 3 Human actions 3 Human-action recognition 3 Representative data samples 3 Skeletal data 3 Time series 3 Time series classifications 3 Times series 3 Warpings 3 ambient-assisted living 3 data augmentation 3 deep learning 3 feature selection 3 kinect 3 neural networks 3 skeletal data 3 time series classification 3 visual sensor-based 3 Aged 2 Ambient Intelligence 2 Artificial Intelligence 2 Human Activities 2 Humans 2 Neural Networks, Computer 2