Abstract
We proposed the improved wavelet neural network and applied it to forecast rainfall. Activation function was selected automatically from three wavelet basis functions. The three given wavelet basis functions were Morlet, Mexican-Hat and Different Of Gauss(DOG) wavelet basis functions respectively. We demonstrat its effectiveness by forecasts rainfall of some cities in China. The results show that the improved wavelet networks method is better than BP neural network method in rainfall forecast.
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