ANN Anhui Province Bayesian technique Beta-Lognormal model Burg entropy EEF method ENSO El Niño GB2 distribution Hei River basin Hexi corridor Kolmogorov complexity Lagrangian function Loess Plateau NDVI Poyang Lake basin Shannon entropy Tsallis entropy accelerating genetic algorithm ant colony fuzzy clustering arid region bagging bootstrap aggregating bootstrap neural networks canopy flow changing environment climacogram coherent structures combined forecast complement