TY - Journal of Yangtze River Scientific Research Institute A1 - MENG Jin-gen T1 - Model of Medium-long-term Precipitation Forecasting in Arid Areas Based on PSO and LS-SVM Methods Y1 - 2016-10-20 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 36 EP - 40 VL - 33 IS - 10 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20160010 ER -