Type-I and Type-II Intermittencies with Two Channels of Re-injection

We have found transitions to chaos via type-I and -II intermittencies with two channels of re-injection instead of only one. There are just two unstable tori at the same value of the parameter, because of the symmetry in the system. This symmetry is responsible for this unusual behavior. These intermittencies show two different laminar regimes. © 1999 Elsevier Science Ltd. All rights reserved.