【摘要】 以高峰期蚜量为预测对象,冬春季气象要素为预测因子,用主成分分析法建立了菏泽市麦蚜发生量预测模型,经试用效果理想。更多还原

【Abstract】 The calculation method of principal component was introduced in this paper.It was discussed that the principal componments were used for seting up regression equation,and the predictive model of amount of wheat aphids was determined in Heze,Shandong Province.The results were accurate.更多还原