On the chaos synchronization phenomena

Chaos synchronization is an important problem in the nonlinear science. How ever, several phenomena can be found in the synchronization systems. Here, we discuss several phenomena involved with the chaos synchronization proble m. Between the involved phenomena, one can find: Complete, Practical and Pa rtial Synchronization. A feedback controller is used to illustrate such syn chronization phenomena. The feedback was recently reported and involves rob ustness features. Such control actions can induce one more phenomena: the A lmost Synchronization (AS). In addition, it is shown that the AS can be fou nd if the master and slave models are strictly different. (C) 1999 Publishe d by Elsevier Science B.V. All rights reserved.