Phase synchronization in coupled nonidentical excitable systems and   array enhanced coherence resonance
  We study the dynamics of a lattice of coupled nonidentical Fitz Hugh-Nagumo system subject to independent external noise. It is shown that these stochastic oscillators can lead to global synchronization behavior {\sl without an external signal}. With the increase of the noise intensity, the system exhibits coherence resonance behavior. Coupling can enhance greatly the noise-induced coherence in the system. 
Bambi Hu and Changsong Zhou (Department of Physics and Centre for   Nonlinear Studies, Hong Kong Baptist University, Hong Ko...