基于灰色关联分析与BP神经网络模型的　日参考作物蒸发蒸腾量预测

Forecast of Daily Reference Evapotranspiration Based on Gray Relation Analysis and BP Neural Network

采用灰色系统理论中的关联分析方法,对影响作物蒸发蒸腾量的各个气象因素进行关联度分析,挑选出影响作物蒸发蒸腾量的主要气象因子,并以这些气象因子为输入向量,以参考作物蒸发蒸腾量为输出向量,建立作物蒸发蒸腾量与主要气象因子之间的BP神经网络预测模型。实例证明:该方法简单可行,预测精度较高,能满足实际生产需要。

Using the interaction analytical method in gray system theory,this paper analyzed all the factors which affected crop evapotranspiration and selected out the main climatic factors.The input vectors were various climatic factors,while the output was the daily reference evapotranspiration,the BP neural network forecast model was established.By means of experiment,this method is easy, accurate and convenient for practical application.