%0 Journal Article
%T The Limit Cycles for a Class of Cubic Systems II<br>一类三次系统的极限环II
%A LIANG Jinpeng
%A <br>梁锦鹏
%J 系统科学与数学
%D 2008
%I 
%X The limit cycles for the cubic system $$\begin{array}{ll}&\dot{x}=-y(1-ax)(1-bx)+\delta x-lx^3,\\2mm]&\dot{y}=x(1-c_1x)(1-c_2x)\end{array}$$are discussed. With some conditions of parameters, the existence and uniqueness of limit cycle are given. The obtained results generalize the existing ones.
%K Cubic system
%K limit cycle
%K existence
%K uniqueness<br>三次系统
%K 极限环
%K 存在性
%K 唯一性.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=37F46C35E03B4B86&jid=0CD45CC5E994895A7F41A783D4235EC2&aid=E8EA585075A38DA3A3B62D43137F8741&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=39E48869A719B9DE&eid=D5970ECA7D10A7B1&journal_id=1000-0577&journal_name=系统科学与数学&referenced_num=0&reference_num=0