【摘要】 森林火灾系统是和自然、社会以及经济发展息息相关的的复杂系统.森林火灾的自组织临界行为也是复杂科学的重要研究领域.森林火灾模型的幂律分布,很好地揭示了森林火灾系统自组织临界性,进一步自组织临界行为研究有利于帮助了解森林火灾系统.研究一个简单的森林火灾模型,通过数值模拟得到了很好的"频率-尺度"分布,模型很好的满足有限尺度效应.引入异质性和风向因素,来讨论和原初模型的"频率-尺度"分布差别,给出了平均过火面积和控制参数的变化关系.模型的结果对如何控制森林火灾提供了很好的建议.更多还原

【Abstract】 Forest fire system is a complex system which relates to nature,society and economic development.The power-law distribution has been verified by forest fire model,and the system shows well self-organized properties.Self-organized behavior has a great significance to help us to understand forest fire system.A simple forest fire model has been investigated,and power-law behavior of frequency-size distribution has been found through numerical simulation.Meanwhile,the model can well satisfy finite-size scaling.The heterogeneity and the direction of wind have been introduced into weighted model to compare the distribution difierences.The results provide a good idea about how to control forest fire.Also,difierent behaviors between mean fire area and the control parameter have been shown.更多还原