A modified genetic algorithm was applied to optimize smoothing factors of GRNN,then model of salvolatile column was built based on GRNN.

• 采用改进的遗传算法优化广义回归神经网络(GRNN)的平滑参数,并运用GRNN的非线性映射能力,建立了碳铵塔出口碳化度和氨滴度的预测模型。