Activity recognition 1 Attention mechanisms 1 Bidirectional gated recurrent unit 1 Complex activity 1 Complex human activity 1 Complex networks 1 Deep learning 1 Human activities 1 Human activity recognition 1 Learning algorithms 1 Pattern recognition 1 Physical activity 1 Recurrent neural networks 1 Smartwatch sensor Wearable computers 1 bidirectional gated recurrent unit 1 complex human activity 1 deep learning 1 human activity recognition 1 smartwatch sensors 1