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arXiv 1608.02646cs.SIphysics.soc-ph
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走向社交网络中的早期和量级级联预测

Toward Early and Order-of-Magnitude Cascade Prediction in Social Networks

Ruocheng Guo, Elham Shaabani, Abhinav Bhatnagar, Paulo Shakarian

摘要:

当一条信息(微博、照片、视频、链接等)当社交网络开始传播时,一个重要的问题出现了:它是否会传播到病毒式的比例-其中病毒式可以定义为数量级的增长。然而,以前的几项研究已经确定,级联的大小和频率是通过幂律相关的-这导致了严重的不平衡,在这个分类问题。在本文中,我们设计了一套基于结构多样性的测量方法-各种社会背景(社区)中,参与给定级联的个人参与。我们证明这些措施能够区分病毒和非病毒级联,尽管这个问题的数据严重不平衡。此外,我们利用这些测量值作为分类方法中的特征,成功地预测了从50到500次转发的微博,其精确度为0.69,病毒类的召回率为0.52-尽管此类样本不到2%。这显著优于我们的基线方法以及当前最先进的方法。我们还表明,这种方法在识别观察60分钟的级联是否会增长到500次转发方面也表现良好,并演示了我们如何在精度和召回率之间进行权衡。

英文摘要:

When a piece of information (microblog, photograph, video, link, etc.) starts to spread in a social network, an important question arises: will it spread to viral proportions - where viral can be defined as an order-of-magnitude increase. However, several previous studies have established that cascade size and frequency are related through a power-law - which leads to a severe imbalance in this classification problem. In this paper, we devise a suite of measurements based on structural diversity - the variety of social contexts (communities) in which individuals partaking in a given cascade engage. We demonstrate these measures are able to distinguish viral from non-viral cascades, despite the severe imbalance of the data for this problem. Further, we leverage these measurements as features in a classification approach, successfully predicting microblogs that grow from 50 to 500 reposts with precision of 0.69 and recall of 0.52 for the viral class - despite this class comprising under 2% of samples. This significantly outperforms our baseline approach as well as the current state-of-the-art. We also show this approach also performs well for identifying if cascades observed for 60 minutes will grow to 500 reposts as well as demonstrate how we can tradeoff between precision and recall.

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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