When the model ofsystem is unbeknown, the computation is very complex for the decouplecondition of disperse time multi-variable non-linearity system which beconstituted by using input-output model.

• 以输人输出模型表示的离散时间多变量非线性系统的可解耦条件，在系统模型未知时，算法相当复杂，无法进行工业应用。