Stackings 11 Machine learning 4 Proton exchange membrane fuel cells (PEMFC) 4 Stacking sequence 4 Deep learning 3 Diseases 3 Ensemble learning 3 Forecasting 3 Humans 3 Learning algorithms 3 STACK 3 human 3 Algorithms 2 Bending strength 2 Decision trees 2 Degradation 2 ELECTRICAL-CONDUCTIVITY 2 Feature selection 2 Fuel cell stack 2 Fuel cells 2 Graphene 2 Hybrid composites 2 Laminated composites 2 Layer stacking 2 Learning systems 2 MANAGEMENT 2 Machine Learning 2 Monitoring 2 Morphology 2 Optimization 2