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选择 196个要素 ,建立数据库 ,利用关联度、图解法结合典型年份的生物学指标进行初选 ,使用了 5大类 10种以上的方法 ,计算出 60 0余个模型 ,从中选出棉铃虫第 2代、第 3代的发生期、发生量的中、短期预报模型。
A total of 196 elements were selected to establish a database. The association degree, the graphic method and the biological indexes of typical years were used for primary selection. Five categories of more than 10 methods were used to calculate more than 60 0 models, Generation 2, generation 3, the occurrence of the amount of medium and short-term forecasting model.