New Trends in Theory and Applications of Complex Control Systems Special Issue in Journal of Control Theory and Applications In recent years modeling and control of complex systems, in particular complex nonlinear systems, have been one of the most active fields in the community of system and control. Various methods such as adaptive control, switching control, distributed and network-based control design methods have been proposed to cope with the complexity of systems under appropriate mathematical assumptions. However, considerable efforts are still needed in order to bridge the gap