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《农作物害虫预测预报的多因子综合相关法》(朱伯承1975昆虫学报第18卷第4期),以下简称综合相关法。此法最大的优点是无需解多元线性代数方程组,经直接分析各因子与预报量的“单相关”,即可建立预报方程。这种方法发表后,我们进行过试用,方法和效果是肯定的。但应用此法除需要逐一计算各个单相关外,特别是需要计算其常数项(b)及系数项(b_(lk)~l),从而建立预报方程(P_l)及进行“0,1”特征处理,计算虽然较简单,但较繁锁,稍不留心,容易搞错。而条件频率法是多因子综合相关法的简化,它比综合相关法更简便、易学,其效果和综合相关法是完全一样的。介绍如下。
“Multi-factor Synthetic Correlation Method for Prediction and Prediction of Crop Pests” (Zhu Bo Cheng 1975 Entomology Vol. 18 No. 4), hereinafter referred to as the Comprehensive Correlation Method. The biggest advantage of this method is that it does not need to solve the multivariate linear algebraic equations. By directly analyzing the “single correlation” between each factor and the forecasting quantity, the forecasting equation can be established. After the publication of this method, we conducted a trial, method and effect is affirmative. However, in addition to the need to calculate each single one by one, the constant term (b) and the coefficient term (b_ (lk) ~ l) need to be calculated in order to establish the prediction equation (P_l) Treatment, although the calculation is relatively simple, but more complicated, slightly careless, easy to make mistakes. Conditional frequency method is a simplification of multi-factor comprehensive correlation method, which is more convenient and easier to learn than comprehensive correlation method. Its effect is exactly the same as comprehensive correlation method. Introduced as follows.