In practical work, new sample data is often obtained continually, so these new data can be joined the empirical equation of regression by using recursive formula, and form a dynamic forecast system.

• 在实际工作中,往往会不断得到新样品数据,可利用递推公式不断地把新信息加入到经验回归方程中去,以构成一个动态的预测系统。