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arXiv 2106.09533cs.IRcs.LGstat.MEstat.ML
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短文本的作者聚类和主题估计

Author Clustering and Topic Estimation for Short Texts

Duke University(杜克大学)

Graham Tierney, Christopher Bail, Alexander Volfovsky

摘要:

短文本的分析,如社交媒体帖子,是非常困难的,因为它们固有的简短。除了对这些帖子的主题进行分类外,一项常见的下游任务是将这些文档的作者分组,以便随后进行分析。我们提出了一种新的模型,扩展了潜在的Dirichlet分配建模强依赖性的话在同一个文件中,与用户级的主题分布。我们还同时集群用户,消除了事后集群估计的需要,并通过缩小嘈杂的用户级主题分布对典型值的主题估计。我们的方法执行以及-或更好-比传统的方法,我们证明了它的有用性的数据集上的推文从美国参议员,恢复有意义的主题和集群,反映党派意识形态。我们还开发了一种新的措施,这些政客之间的回声室特征的孤立性的参议员群体讨论的主题,并提供不确定性量化。

英文摘要:

Analysis of short text, such as social media posts, is extremely difficult because of their inherent brevity. In addition to classifying topics of such posts, a common downstream task is grouping the authors of these documents for subsequent analyses. We propose a novel model that expands on the Latent Dirichlet Allocation by modeling strong dependence among the words in the same document, with user-level topic distributions. We also simultaneously cluster users, removing the need for post-hoc cluster estimation and improving topic estimation by shrinking noisy user-level topic distributions towards typical values. Our method performs as well as -- or better -- than traditional approaches, and we demonstrate its usefulness on a dataset of tweets from United States Senators, recovering both meaningful topics and clusters that reflect partisan ideology. We also develop a novel measure of echo chambers among these politicians by characterizing insularity of topics discussed by groups of Senators and provide uncertainty quantification.

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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