Complexity

Research Article

Forecasting Different Types of Droughts Simultaneously Using Multivariate Standardized Precipitation Index (MSPI), MLP Neural Network, and Imperialistic Competitive Algorithm (ICA)

Table 3

Time lags of MSPI as inputs selected by ACF.
Time windowStationTime significant correlated time lags (month)
MSPI3–6Hamedan1, 2, 3
Kermanshah1, 2, 3
MSPI6–12Hamedan1, 2, 3, 4, 5
Kermanshah1, 2, 3, 4, 5
MSPI3–12Hamedan1, 2, 3, 4, 5
Kermanshah1, 2, 3, 4, 5
MSPI12–24Hamedan1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Kermanshah1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
MSPI24–48Hamedan1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17
Kermanshah1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20