论文部分内容阅读
利用经典的逐步回归方法，对安徽省凤阳县和江苏省南通县的稻纵卷叶螟各代次的高峰日、高峰日蛾量及峰累计蛾量提前１～２个月作中期预测，两年预测结果准确率达７７％。并对逐步回归分析法中Ｆ值的控制和预报因子的选取等问题作了深入的讨论。
By using the classical stepwise regression method, the peak daily, the peak daily moth and the cumulative peak moth of rice leaf roller in Fengyang County of Anhui Province and Nantong County of Jiangsu Province were predicted by 1 ~ 2 months in advance. Two-year forecast accuracy of 77%. In addition, the problems of the control of F value and the selection of forecasting factors in stepwise regression analysis are discussed in depth.