Learning systems Deep learning 7 Students 6 Learning algorithms 5 Teaching 5 Model-based OPC 4 Real- time 4 Artificial intelligence 3 Big data 3 Curricula 3 Data mining 3 Deep neural networks 3 English Learning 3 Heart 3 Learning models 3 Teachers' 3 Backpropagation 2 Cloud computing 2 College students 2 Colleges and universities 2 Computation theory 2 Diagnosis 2 E-learning 2 Edge computing 2 Engineering education 2 English teaching 2 Heart-rate 2 Image recognition 2 Information management 2 Long short-term memory 2