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论文类型：期刊论文

发表时间：2002-09-01

发表刊物：PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS

收录刊物：Scopus、SCIE、EI

卷号：312

期号：1-2

页面范围：243-250

ISSN号：0378-4371

关键字：Penna model; cellular automata; Lotka-Volterra model; predation; population

摘要：In Penna's single-species asexual bit-string model of biological ageing, the Verhulst factor has too strong a restraining effect on the development of the population. Danuta Makowiec gave an improved model based on the lattice, where the restraining factor of the four neighbours take the place of the Verhulst factor. Here, we discuss the two populations' Penna model with predation on the planar lattice of two dimensions. A cellular automata model containing movable wolves and sheep has been built. The results show that both the quantity of the wolves and the sheep fluctuate in accordance with the law that one quantity increases while the other one decreases. (C) 2002 Elsevier Science B.V. All rights reserved.