As far as we know, for chaos synchr

As far as we know, for chaos synchronization, most of the existing control methods [7, 8, 9, 10, 11] only deal with the chaotic systems whose systems do not include model uncertainty and external disturbance. Some methods can be used to cancel the uncertainty and disturbance, but the uncertainty and the disturbance are assumed bounded. As a matter of fact, uncertainty and the disturbance of such systems cannot be avoided, and are often very large. Therefore, to investigate chaotic synchronization of the systems with both model uncertainty and disturbance is not only necessary, but also meaningful.