| 作为CAS的复杂城市地理系统的SOC性质 |
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| 引用本文： | 刘继生,陈彦光.作为CAS的复杂城市地理系统的SOC性质[J].地理科学,2007,27(2):129-135. |
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| 作者姓名： | 刘继生 陈彦光 |
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| 作者单位： | 1. 东北师范大学城市与环境科学学院,吉林,长春,130024
2. 北京大学地理科学研究中心,北京,100871 |
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| 摘 要： | 将城市作为复杂适应性系统(CAS)研究其自组织临界性(SOC)具有重要的理论意义和实践价值,这方面的探索工作刚刚开始.本文从城市的地理空间角度出发,论证城市是一种复杂适应性系统.城市在本质上是不可还原的,我们可以根据积木的机制将城市分解,但分解的结果对解释城市的复杂行为丝毫没有帮助.由于城市和城市体系都具有分形结构、服从Ziopf定律,且具有1/f噪声的特征,由此判断城市地理系统具有自组织临界性质.自组织临界性与复杂性适应性立论的视角不同,但可以统一于"混沌的边缘"这一概念.
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| 关 键 词： | 城市 复杂空间系统 复杂适应系统 自组织临界性 分形 Zipf定律 1/f噪声 |
| 文章编号： | 1000-0690（2007）02-0129-07 |
| 收稿时间： | 06 14 2006 12:00AM |
| 修稿时间： | 2006-06-142006-10-30 |
SOC of Complex Urban Geographical Systems as CAS |
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| LIU Ji-Sheng,CHEN Yan-Guang.SOC of Complex Urban Geographical Systems as CAS[J].Scientia Geographica Sinica,2007,27(2):129-135. |
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| Authors: | LIU Ji-Sheng CHEN Yan-Guang |
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| Institution: | 1. College of Urban and Envrironmental Sicences, Northeast Normal University, Changchun, Jilin 130024; 2. Department of Geography, Peking University, Beijing, 100871 |
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| Abstract: | As complex spatial systems,cities are discussed using the theories of complex adaptive systems(CAS) and self-organized criticality(SOC).First,cities are considered as CASs by analogy with four properties including aggregation,nonlinearity,flows,and diversity,and three mechanisms including tagging,internal models,and building blocks.However,cities seem to be divided into a series of building blocks,but we cannot use the interaction of blocks to interpret the behaviors of cities at the macro level.Second,three indications of SOC including fractals,Zipf's law,and 1 over f noise are researched by means of mathematical transformation and empirical observations.A discovery is that fractals are the principal marks of SOC.Both the concepts of CAS and SOC can be unified on "the edge of chaos",another important concept in complex sciences. |
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| Keywords: | cities complex spatial system complex adaptive system selforganized criticality fractals Zipf's law 1 over f noise |
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