Linear and non-linear models were studied from three aspects: theokles,hypotheses,and selectingmodels. Main stage models from aborad was analysed.

• 本文从理论特征,建模主要假设及确认方法等方面,对线性模型和阶段非线性模型的建模问题进行了较系统的研究,对国外主要的阶段模型进行了比较分析,提出了模型适用条件;