neural network machine learning 26 History of engineering & technology 16 Research & information: general 13 Technology: general issues 13 deep learning 13 artificial intelligence 12 optimization 11 genetic algorithm 7 image processing 7 pattern recognition 7 principal component analysis 7 support vector machine 7 sustainability 7 artificial neural network 6 feature extraction 6 mechanical properties 6 transfer learning 6 CNN 5 big data 5 calibration 5 convolutional neural networks 5 smart grid 5 FTIR 4 LSTM 4 classification 4 convolutional neural network 4 electric vehicles 4 feature selection 4 groundwater 4