A descriptor system transformation was taken to derive a sufficient condition for the existence of a state feedback robust non-fragile H∞ controller.

Choosing a novel Lyapunov-Krasovskii functional and introducing the equivalent descriptor system,we investigate the asymptotical stability for the Cohen-Grossberg neural networks with time-varying and continuously distributed time-delays.

In this paper,the approach of system description making use of UML is analyzed and giving the method of system description by using of use case diagram,class diagram,activity diagram and collaboration diagram in accordance with the artillery regiment-group combat system as a instance.