为什么级联大小遵循幂律?
Why Do Cascade Sizes Follow a Power-Law?
摘要:
本文引入随机有向无环图,并利用它对信息扩散网络进行建模。随后,我们分析了Leskovec等人[19]引入的级联生成模型(CGM)。到目前为止,对这一模型的实证研究还很少。在本文中,我们提出的第一个理论证明,由CGM产生的级联的大小遵循幂律分布,这是符合多个大型社交网络的实证分析。我们将我们的模型的假设与Twitter社交网络进行了比较,并测试了近似的良好性。
英文摘要:
We introduce random directed acyclic graph and use it to model the information diffusion network. Subsequently, we analyze the cascade generation model (CGM) introduced by Leskovec et al. [19]. Until now only empirical studies of this model were done. In this paper, we present the first theoretical proof that the sizes of cascades generated by the CGM follow the power-law distribution, which is consistent with multiple empirical analysis of the large social networks. We compared the assumptions of our model with the Twitter social network and tested the goodness of approximation.
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