本文利用上下解方法和稳定性理论,讨论了一类带Beddington-DeAngelis反应项的捕食一食饵模型解的渐近行为,给出了正解一致持续的充分条件。同时,利用上下解方法证明了一个正的全局吸引子的存在性。文中的结果表明,在一定的条件下,相互作用的种群是可以持续生存的。
The asymptotic behavior for a kind of predator-prey models with Beddington-DeAngeas (BD) functional response is discussed. The method of upper and lower solutions and the theory of stability are used. The persistence of time-dependent positive solutions to this system is derived. In addition, a positive global attractor is presented by the method of upper and lower solutions for a class of elliptic system. The result gives certain conditions which ensure the persistence of species.