In order to demonstrate the features of SMI methods, comparison between the SMI methods and the prediction error methods (PEM) is made based on the same data sets collected from real-life application.

• 为说明SMI方法的特性，通过一个工厂实际例子研究对比了3种SMI基本算法和一种传统辨识算法-预测误差方法(PEM)。