arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.3188physics.soc-phcs.SIphysics.data-an
收藏

真实网络中的可扩展性、社区和功能模块聚类

Clustering assortativity, communities and functional modules in real-world networks

Lovro Šubelj, Marko Bajec

摘要:

现实世界系统的复杂网络被认为是由常见现象控制的,产生的结构远非规则或随机。集群化、群落结构和按程度进行的非竞争性混合也许是后者最突出的例子。虽然这些性质被普遍接受用于社交网络,但它们只能部分解释其他网络的结构。我们首先表明,度校正的聚类是在相反的标准定义,高度重复性。然而有趣的是,我们进一步注意到,非社交网络包含具有非常低聚类的连接区域。因此,现实世界的网络结构是超越社区的。在这里,我们调查的概念功能模块-定期等价节点组-并表明,这种结构可以解释在非社会网络中观察到的属性。现实世界的网络可能由社区覆盖的功能模块组成。我们支持后者提出了一个简单的网络模型,生成无标度的小世界网络可调聚类和度混合。模型在许多现实世界的网络中有一个自然的解释,同时它也提供了一个适当的社区提取框架的见解。我们还提出了一种在没有任何先验知识的情况下检测任意结构模块的算法。算法被证明是优于国家的最先进的,而应用到现实世界的网络揭示了良好的支持复合材料的不同结构模块,是一致的底层系统。在包括社交网络在内的所有类型的网络中,都有明确的功能模块。因此,我们的发现揭示了功能模块是复杂现实世界网络的另一个关键组成部分。

英文摘要:

Complex networks of real-world systems are believed to be controlled by common phenomena, producing structures far from regular or random. Clustering, community structure and assortative mixing by degree are perhaps among most prominent examples of the latter. Although generally accepted for social networks, these properties only partially explain the structure of other networks. We first show that degree-corrected clustering is in contrast to standard definition highly assortative. Yet interesting on its own, we further note that non-social networks contain connected regions with very low clustering. Hence, the structure of real-world networks is beyond communities. We here investigate the concept of functional modules---groups of regularly equivalent nodes---and show that such structures could explain for the properties observed in non-social networks. Real-world networks might be composed of functional modules that are overlaid by communities. We support the latter by proposing a simple network model that generates scale-free small-world networks with tunable clustering and degree mixing. Model has a natural interpretation in many real-world networks, while it also gives insights into an adequate community extraction framework. We also present an algorithm for detection of arbitrary structural modules without any prior knowledge. Algorithm is shown to be superior to state-of-the-art, while application to real-world networks reveals well supported composites of different structural modules that are consistent with the underlying systems. Clear functional modules are identified in all types of networks including social. Our findings thus expose functional modules as another key ingredient of complex real-world networks.

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。

↑