Principal component analysis 16 Principal-component analysis principal component analysis 5 Quality control 4 BP neural networks 3 Forecasting 3 Geographic information systems 3 Neural networks 3 Spatial variables measurement 3 Autocorrelation 2 BP neural network 2 Carbon 2 Data-driven fault diagnosis 2 Deposition 2 Ecology 2 Ecosystem services 2 Ecosystems 2 Factor analysis 2 Failure analysis 2 Fault detection 2 Faults diagnosis 2 Free energy 2 Free energy landscape 2 Fuel cell system 2 GIS 2 Heat exchanger rupture 2 Heat exchangers 2 Information use 2 Learning algorithms 2 Principal Component Analysis 2