arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0801.1063cs.IRcs.DB
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基于多粒度主题模型的在线评论建模

Modeling Online Reviews with Multi-grain Topic Models

Ivan Titov, Ryan McDonald

摘要:

在本文中,我们提出了一种新的框架,用于提取对象的可评级方面的在线用户评论。提取这些方面是从网络中自动挖掘产品意见和生成基于意见的用户评论摘要的重要挑战。我们的模型是基于扩展的标准主题建模方法,如LDA和PLSA诱导多粒度的主题。我们认为多粒度模型更适合我们的任务,因为标准模型倾向于产生与对象的全局属性相对应的主题(例如,产品类型的品牌)而不是倾向于由用户评定的对象的方面。我们提出的模型不仅提取了可评价的方面,而且还将它们聚类为连贯的主题,例如,“waitress”和“bartender”是餐馆“staff”同一主题的一部分。这与以前的许多工作不同,以前的工作通过词频分析以最小聚类提取方面。我们从定性和定量两个方面对多粒度模型进行了评估,以表明它们在标准主题模型上有显着改进。

英文摘要:

In this paper we present a novel framework for extracting the ratable aspects of objects from online user reviews. Extracting such aspects is an important challenge in automatically mining product opinions from the web and in generating opinion-based summaries of user reviews. Our models are based on extensions to standard topic modeling methods such as LDA and PLSA to induce multi-grain topics. We argue that multi-grain models are more appropriate for our task since standard models tend to produce topics that correspond to global properties of objects (e.g., the brand of a product type) rather than the aspects of an object that tend to be rated by a user. The models we present not only extract ratable aspects, but also cluster them into coherent topics, e.g., `waitress' and `bartender' are part of the same topic `staff' for restaurants. This differentiates it from much of the previous work which extracts aspects through term frequency analysis with minimal clustering. We evaluate the multi-grain models both qualitatively and quantitatively to show that they improve significantly upon standard topic models.

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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