“…In recent years, stability issue in various neutral time delay systems have been widely investigated in many reports [8,11,13,14,16,26]. Moreover, the stability for the systems with time varying delays will be an important focus that described systems more physical than the constant time delays cases [1,3,4,6,8,14,19,20,27]. It is well known that in practice, systems almost present some uncertainties and nonlinear perturbations.…”