带有扩散和时滞的捕食与被捕食模型的稳定性与Hopf分支
Stability and Hopf bifurcation of a predator-prey model with time delay and dispersion
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摘要: 本文考虑一类带有扩散和时滞的捕食与被捕食模型,分析了系统的非负不变性,边界平衡点性质及全局稳定性.在这一系统中,当时滞τ=τ1+τ2适当小时,正平衡点是局部渐近稳定的,随着时滞的增加,正平衡点由稳定变为不稳定,系统在平衡点附近发生Hopf分支.Abstract: A system of retarded functional differential equations is proposed as a predator-prey model with time delay in two-patches. The invariance of non-negativity,nature of boundary equilibria and global stability are analyzed.We show that positive equilibrium is locally asymptotically stable when time dalays τ=τ_1+τ_2 is suitable small, while a loss of stability by a Hopf bifurcation can occur as the delays increase.