<正> The Kapchinsky Vladimirsky(K-V)beam through a hackle periodic-focusing magnetic field is studiedusing the particle-core model.The beam halo-chaos is found,
<正> In this paper,an electric system with two dichotomous resistors is investigated.It is shown that thissystem can display two stochastic resonances,which are
<正> In this paper,starting with the well known U(1)Chern-Simons Lagrangian and the covariant derivative ofa complex scalar matter field,we give a detailed disc