【摘要】 研究了一类具HollingⅡ类功能反应的三维循环捕食系统 ,给出了其持续生存的判据 ,特别当系统是周期系统时 ,得到了此系统存在平稳振荡的充分条件更多还原

【Abstract】 In this paper, the cyclic and predutor-prey model of three species with Holling’s type Ⅱ functional response is discussed. A criterion for the perisistene of the system is given, the sufficient condition for the existence of stationary oscillation of the system with periodic coefficients is obtained.更多还原