空间公共品博弈中种群密度的影响  

Effect of Population Density in Spatial Public Goods Game

作　　者：肖尧[1] 刘进军[1] 文爱兵[1] 

机构地区：[1]宁波大学理学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2012年第3期83-87,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(10575055)

摘　　要：采用Monte Carlo数值模拟方法,对周期性边界条件下空间公共品博弈进行了研究,讨论了在学习和迁移两种策略的共同作用下,种群密度对空间分布和合作演化的影响.密度较低时,合作者与背叛者共存;随着密度的增大,合作者的比例增加;密度较高时,系统由共存态转变为纯粹的合作态;但密度足够高时,合作行为完全消失.并通过研究空间形貌,对这些不同的合作演化行为进行了分析.With effects of the imitation and migration of the individuals in the spatial public goods game, the influence of population density on cooperation is studied using Monte Carlo simulation. When the density is low, the cooperators and defectors can coexist. As the density increases, the proportion of cooperator augments and the cooperation may thrive. On the contrary, the cooperation vanishes in circumstances with adequately high density. The evolutions of the spatial patterns of cooperators are investigated and the different evolution mechanisms of cooperation is analyzed.

关 键 词：公共品博弈 种群密度 空间分布 合作演化 

分 类 号：O414.22[理学—理论物理] O414.13[理学—物理]