【摘要】 研究了污染环境中毒素压力影响下的单种群Ｓｍｉｔｈ模型，得到了种群－毒素动力系统是局部和全局渐近稳定的结果；证明了当环境中毒素周期性扰动时，系统周期解的存在性更多还原

【Abstract】 A Simple dynamic model of toxicant-population which is based on Smiths model is analyzed, and a condusions that the toxicant-population system is locally and globally asymptotically stable under some conditions is obtained. The existence of the system’s periodic sollution is demonstrated when the toxicant in the polluted environment perturbs periodically.更多还原