考虑一类双资源和两种微生物且具有时滞和脉冲输入的恒化器模型, 证明了微生物灭绝周期解的存在性, 并得到该周期解全局吸引性的临界条件和系统持久的充分条件, 最后利用数值模拟结果说明本文的主要结论. 

A chemostat model with periodic pulse and time delay is discussed in this paper. The existence of the microorganism-free periodic solution is proved, which is globally attractive under some critical conditions. Moreover, the sufficient conditions on permanence of the system is obtained. Finally, some numerical simulations are given to illustrate the main results.