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arXiv physics/0502082physics.soc-ph
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复杂系统的一个广义偏好依恋模型

A Generalized Preferential Attachment Model for Complex Systems

Kazuko Yamasaki, Kaushik Matia, Dongfeng Fu, Sergey V. Buldyrev, Fabio Pammolli, Massimo Riccaboni, H. Eugene Stanley

摘要:

复杂系统可以通过根据系统特定规则定义的其元素的等价类来表征。我们提出了一个广义偏好依恋模型来描述班级规模分布。该模型假定现有阶级优先增长,新阶级稳步涌入。我们调查如何分布取决于初始条件和变化从一个纯粹的指数形式为零涌入的新类的幂律指数截止形式时,涌入的新类是大量的。我们应用该模型研究了医药行业的增长动力。

英文摘要:

Complex systems can be characterized by classes of equivalency of their elements defined according to system specific rules. We propose a generalized preferential attachment model to describe the class size distribution. The model postulates preferential growth of the existing classes and the steady influx of new classes. We investigate how the distribution depends on the initial conditions and changes from a pure exponential form for zero influx of new classes to a power law with an exponential cutoff form when the influx of new classes is substantial. We apply the model to study the growth dynamics of pharmaceutical industry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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