This work was supported by the Natural Science Foundation of Fujian (Z0511052);the Foundation of Fujian Education Bureau (JA04158, JA04274);the Foundation of Developing Science and Technology of Fuzhou University (2005-QX-20).
In this paper,we consider a class of quartic system,which is more general and realistic than the quartic accompanying system. Consequently,we obtain sufficient conditions concerning the uniqueness of limit cycle as we...