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arXiv 2008.07005math.PRstat.APstat.ME
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Poisson测量下的有向偏好依恋模型

A Directed Preferential Attachment Model with Poisson Measurement

Tiandong Wang, Sidney I. Resnick

摘要:

在建模有向社会网络时,一种选择是使用传统的偏好依恋模型,该模型生成幂律尾部分布。在传统的有向优先连接中,每个新的边都被顺序地添加到网络中。然而,对于真实的数据集,通常只有粗略的时间戳可用,这意味着在相同的时间戳上创建了几个新的边。先前对社交网络演化的分析表明,在达到稳定阶段后,网络中边数的增长遵循非齐次泊松过程,其速率在一天内是恒定的,但每天的速率都在变化。考虑到这些经验观察,我们提出了一个修正的偏好依恋模型的泊松测量,并研究其渐近行为。然后将这个修改后的模型拟合到真实的数据集上,我们看到它比传统的模型提供了更好的拟合。

英文摘要:

When modeling a directed social network, one choice is to use the traditional preferential attachment model, which generates power-law tail distributions. In a traditional directed preferential attachment, every new edge is added sequentially into the network. However, for real datasets, it is common to only have coarse timestamps available, which means several new edges are created at the same timestamp. Previous analyses on the evolution of social networks reveal that after reaching a stable phase, the growth of edge counts in a network follows a non-homogeneous Poisson process with a constant rate across the day but varying rates from day to day. Taking such empirical observations into account, we propose a modified preferential attachment model with Poisson measurement, and study its asymptotic behavior. This modified model is then fitted to real datasets, and we see it provides a better fit than the traditional one.

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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