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arXiv 0707.1963cond-mat.dis-nncond-mat.stat-mech
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无向无标度网络中的Kauffman布尔模型

Kauffman Boolean model in undirected scale free networks

Piotr Fronczak, Agata Fronczak, Janusz A. Holyst

摘要:

本文用解析和数值方法研究了任意度分布的无向随机布尔网络的临界线,包括连接的无标度拓扑$P(k)\sim k^{-γ}$。我们证明了在无限无标度网络中,$3<γ< 3.5$的冻结相和混沌相之间发生了转变。观察结果很有趣,原因有二。首先,由于无标度网络中的大多数临界现象都揭示了它们对于$γ<3$的非平凡性,因此Kauffman模型中临界线的位置似乎是该规则的一个重要例外。其次,由于基因调控网络的特点是无标度拓扑结构与$γ<3$,观察到,在有限大小的网络中,上述过渡移动到较小的$γ$是一个参数考夫曼模型作为一个很好的起点,以模拟真实的系统。我们还解释了经典随机图的数值模拟中临界线的不可达性是由于渗流现象。

英文摘要:

We investigate analytically and numerically the critical line in undirected random Boolean networks with arbitrary degree distributions, including scale-free topology of connections $P(k)\sim k^{-γ}$. We show that in infinite scale-free networks the transition between frozen and chaotic phase occurs for $3<γ< 3.5$. The observation is interesting for two reasons. First, since most of critical phenomena in scale-free networks reveal their non-trivial character for $γ<3$, the position of the critical line in Kauffman model seems to be an important exception from the rule. Second, since gene regulatory networks are characterized by scale-free topology with $γ<3$, the observation that in finite-size networks the mentioned transition moves towards smaller $γ$ is an argument for Kauffman model as a good starting point to model real systems. We also explain that the unattainability of the critical line in numerical simulations of classical random graphs is due to percolation phenomena.

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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