permanance meaning in English

耐久性

This paper consists of three parts : we first consider the non - autonomous predator - prey system with both beddirigton - deangelis functional response and dispersion . by using comparison theorem of differential equation , we study the permanance of the system . after that , by constructing suitable lyapunov function , we obtain some sufficient condition which guarantee the existence of globally asymptotically stable almost periodic solution of the system
本文研究三方面的内容：第一部分考虑具有扩散和beddington ? deangelis功能反应的捕食-食饵系统，利用微分方程比较原理得到该系统一致持续生存的条件；通过构造适当的lyapunov函数得到了该系统存在全局渐近稳定概周期解的充分条件。