利用构造正定矩阵的方法，给出了判别不确定时滞系统鲁棒 稳定的几个新结果，同时讨论了这类系统的稳定度.与前人的有关结果相比，该方法不需计 算矩阵的范数和最小特征值.
By using the method of constructing positively defin ite matrix,some new results for robust stability of uncertain time-delay systems are derived,and the stability degree is also discussed.As compared with previou s related results,the method in this paper need not to compute norm and minimum eigenvalues of the matrices.
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