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arXiv 2102.03525stat.MLcs.IRcs.LG
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独家主题建模

Exclusive Topic Modeling

National University of Singapore(新加坡国立大学)

Hao Lei, Ying Chen

摘要:

我们提出了一个排他性主题建模(ETM)的无监督文本分类,这是能够1)识别领域特定的关键字,虽然不经常出现,2)提供结构良好的主题与排他性的话。特别地,施加加权Lasso惩罚以自动减少频繁出现但不太相关的词的优势,并且成对的库尔贝克-莱布勒散度惩罚用于实现主题分离。仿真研究表明,ETM检测特定领域的关键字,而LDA失败。当应用于基准NIPS数据集时,加权Lasso惩罚和成对库尔贝克-莱布勒散度惩罚的模型的主题一致性得分平均分别提高了22%和10%。

英文摘要:

We propose an Exclusive Topic Modeling (ETM) for unsupervised text classification, which is able to 1) identify the field-specific keywords though less frequently appeared and 2) deliver well-structured topics with exclusive words. In particular, a weighted Lasso penalty is imposed to reduce the dominance of the frequently appearing yet less relevant words automatically, and a pairwise Kullback-Leibler divergence penalty is used to implement topics separation. Simulation studies demonstrate that the ETM detects the field-specific keywords, while LDA fails. When applying to the benchmark NIPS dataset, the topic coherence score on average improves by 22% and 10% for the model with weighted Lasso penalty and pairwise Kullback-Leibler divergence penalty, respectively.

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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