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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：799-805

ISSN号：0129-1831

关键字：epidemic; Penna model; cellular automata

摘要：A cellular Automata model is developed aiming to study the epidemic on a lattice of two dimensions. The characteristics of individual including reproduction, death by inherited diseases and age are studied in the Penna, model. The spreading of epidemic and the reproduction of individual are considered as cellular automata. We shall mainly discuss the influence on the number of epidemical patients by infection rate and death rate. The results show that the existence of epidemic mainly depends on the infection rate and the death rate but not the initial ratio of patients. There are two reasons for nonexistent epidemic. As long as the infection rate is less than 0.3, the epidemic cannot spread. On the other hand, if the infection rate and the death rate are both high, the individuals with epidemic die out and the epidemic cannot spread, either. The epidemic can exist all along when the combination of infection rate and death rate are in the mid area.