摘要
借助平面定性理论的方法,讨论了一类三种群的非线性模型的极限环的存在性、唯一性问题.
By use of the method of the planar qualitative theory,existence and uniqueness of the limit cycle were researched for a nonlinear model of the population of Korean pines.
出处
《广西大学学报(自然科学版)》
CAS
CSCD
1999年第4期307-309,312,共4页
Journal of Guangxi University(Natural Science Edition)
关键词
红松林
种群
非线性模型
极限环
定性理论
population of dorean pines
nonlinear model
limit cycle
qualitative theory