<正> Instead of the usual Hirota ansatz,i.e.,the functions in bilinear equations being chosen as exponentialtypes,a generalized Hirota ansatz is proposed for a
<正> We numerically study the dynamics of meandering spiral waves in the excitable system subjected to afeedback signal coming from two measuring points located
<正> Paolo Facchi,et al.[Phys.Rev.A 77 (2008)060304(R)]presented a maximally multipartite entangledstate (MMES).Here,we give a criterion for the identification
<正> We investigate the evolutionary prisoner’s dilemma game in structured populations by introducing dimers,which are defined as that two players in each dime