LI Dong-mei, YIN Xiao, SHAO Chen. The Stability of Smith’s Model in a Polluted Environment[J]. 2011, 16(3): 98-103.DOI:
污染环境中Smith模型的稳定性
摘要
针对小容量污染环境中的种群生存问题
考虑了环境毒素浓度和体内毒素浓度受死亡种群的影响
研究了一类外界毒素输入率是常数的污染环境中单种群Smith模型.给出了平衡点存在条件
利用Ruth-Hurwitz准则和复合矩阵理论的分析方法
讨论了平衡点的局部稳定性及全局稳定性.
Abstract
In view of the species survival problem in polluted environment of small capacity
considering the effect of the variance of the dead population on the internal and environmental toxicant density
the Smith’s model with constant input rate of toxin in polluted environment is studied.The existence conditions of the positive equilibrium is identified
by using Ruth-Hurwitz criterion and the analysis method of complex matrix theory
the local stability and the global stability of equilibriums are discussed.