数学的实践与认识
數學的實踐與認識
수학적실천여인식
MATHEMATICS IN PRACTICE AND THEORY
2009年
17期
91-96
,共6页
阶段%重合度%时滞%周期解
階段%重閤度%時滯%週期解
계단%중합도%시체%주기해
staged structure%coincidence degree%delay%periodic solution
考虑了一类具有阶段结构和脉冲收获的捕食模型.讨论了解的非负性和有界性.利用重合度定理,得到了正周期解存在的充分条件.
攷慮瞭一類具有階段結構和脈遲收穫的捕食模型.討論瞭解的非負性和有界性.利用重閤度定理,得到瞭正週期解存在的充分條件.
고필료일류구유계단결구화맥충수획적포식모형.토론료해적비부성화유계성.이용중합도정리,득도료정주기해존재적충분조건.
We consider a predator-prey model, which has stage structure and impulsive harvesting. We discuss the boundedness of solution. By using the continuation theorem of coincidence degree theory, a sufficient condition is obtained for the existence of a positive periodic solution of this system.
