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论文类型：期刊论文

发表时间：2005-05-01

发表刊物：INTERNATIONAL JOURNAL OF MODERN PHYSICS C

收录刊物：Scopus、SCIE

卷号：16

期号：5

页面范围：807-814

ISSN号：0129-1831

关键字：the Penna model; the wealth of the individual; Monte-Carlo method

摘要：We present a simulation model based on the Penna model to study the population evolution. The wealth of the individual is considered in the model. We define increasing ratio a and decreasing ratio beta of the wealth presenting the individual wealth variation, also define minimum wealth PROMO which works when one reproduces. We study the influence of alpha and beta on a species' survival or downfall, and the influence of PROMO on the age distribution of a species. According to the different values of alpha and beta, we find diverse regimes where a species will survive or die out, and even the regime where species' survival or downfall axe very sensitive. We study the relation between life expectancy and the wealth of the individual, finding that life expectancy doesn't increase but decrease a little when the wealth of the individual increases.