A revisit of some delay-dependent stability criteria for uncertain time-delay systems *

This article revisits some delay-dependent stability criteria previous discussed in the literature. A more systematic approach is taken, and different forms of stability criteria are developed. The form is more convenient to treat related uncertainty in different system matrices. The relationship between the stability criteria based on simple Lyapunov-Krasovskii functional method and on Razumikhin Theorem are more explicitly shown