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【求助】50金币求文章
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本人正在写论文，现50金币求文章"A stochastic model for the effects of toxicants on populations"， 作者：TC Gard Ecological Modelling, 1990 Accepted 15 January 1990. ; Available online 30 June 2003. This article is not included in your organization's subscription. However, you may be able to access this article under your organization's agreement with Elsevier. Abstract A stochastic model for the dynamics of a toxicant in the environment is proposed and analyzed. Then, a three-component model, consisting of a population density of an organism, and the concentrations of the toxicant in the organism and in the environment respectively, is considered. Estimates for the probabilities of persistence and extinction of the population are calculated. [ Last edited by laizuliang on 2008-7-21 at 10:31 ] |
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