摘要
就二次系统可能出现的四种情形,总结出孤立奇点附近轨线的定性结构。
In the light of four kinds of conditions which possibly appeared in quadratic system, this paper sums up the qualitative structure of loci which is near singular point, so as to make further research on limit cycle of quadratic system.
出处
《沈阳建筑工程学院学报》
1991年第1期104-111,共8页
Journal of Shenyang Archit Civil Eng Univ: Nat Sci
关键词
二次系统
极限环
孤立奇点
limit cycle
foci
saddle point
isolated singular point
special direction
qualitative structure
