Results: the morbidity level increased with dust dose increased and we obtained an equationofregression between them.
结果：发病水平随接尘剂量的增高而增高，求得了两者之间的回归方程。
2
The gained predicting equationofregression could predict the effects on rice seed vigour at different Pb concentrations.
得到的回归预测方程能有效预测不同铅浓度对水稻种子活力的影响。
3
In practical work, new sample data is often obtained continually, so these new data can be joined the empirical equationofregression by using recursive formula, and form a dynamic forecast system.