Correlation methods 70 Pearson correlation coefficients 11 Forecasting 10 Regression analysis 9 China 7 Deep learning 7 Mean square error 7 Correlation analysis 6 Diagnosis 6 Learning systems 6 Surveys 6 Vegetation 6 Factor analysis 5 Gene expression 5 NDVI 5 Neural networks 5 Pearson correlation 5 correlation 5 Canonical correlation analysis 4 Correlation 4 Decision trees 4 Forestry 4 Humans 4 Linear regression 4 Machine-learning 4 Positive correlations 4 Remote sensing 4 Support vector machines 4 Water conservation 4 Water quality 4