| 环境污染下具有脉冲毒素投放的两种群竞争系统持久性 |
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| 引用本文： | 刘渊敏,黄灿云.环境污染下具有脉冲毒素投放的两种群竞争系统持久性[J].甘肃科学学报,2011,23(3):139-144. |
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| 作者姓名： | 刘渊敏 黄灿云 |
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| 作者单位： | 兰州理工大学理学院,甘肃兰州,730050 |
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| 基金项目： | 兰州理工大学博士基金项目(BS10200903) |
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| 摘 要： | 主要研究环境污染中具有脉冲投放毒素的两种群竞争系统,利用比较原理讨论了两种群体内毒素不同时,脉冲投放毒素对竞争系统的影响,得到了种群弱持续生存和灭绝的阈值条件.
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| 关 键 词： | 竞争系统 脉冲 毒素 持续生存 灭绝 |
Persistence of a Two-species Competition System in a Polluted Environment with Impulsive Toxicant Input |
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| LIU Yuan-min,HUANG Can-yun.Persistence of a Two-species Competition System in a Polluted Environment with Impulsive Toxicant Input[J].Journal of Gansu Sciences,2011,23(3):139-144. |
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| Authors: | LIU Yuan-min HUANG Can-yun |
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| Institution: | LIU Yuan-min,HUANG Can-yun(School of Sciences,Lanzhou University of Science and Technology,Lanzhou 730050,China) |
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| Abstract: | This paper is to investigate persistence of a Lotka-Volterra competition system in a polluted environment with impulsive toxicant input at fixed moments,in which two species have different concentrations of the toxicant.The effects of impulsive toxicant input with a constant rate on two-species Lotka-Volterra competition system are considered,and the thresholds between persistence and extinction of each population are obtained. |
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| Keywords: | competition system impulsive toxicant persistence extinction |
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