arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.0586cs.CL
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异步会话中的话题分割与标注

Topic Segmentation and Labeling in Asynchronous Conversations

Qatar Computing Research Institute(卡塔尔计算研究所);University of British Columbia(不列颠哥伦比亚大学)

Shafiq Rayhan Joty, Giuseppe Carenini, Raymond T Ng

摘要:

话题分割和标记通常被认为是更高级别会话分析的先决条件,并且已被证明在许多自然语言处理(NLP)应用中是有用的。我们提出了两个新的语料库的电子邮件和博客对话注释的主题,并评估注释器的可靠性,在这些异步对话的分割和标记任务。我们提出了一个完整的计算框架,主题分割和标签在异步会话。我们的方法通过考虑异步会话的细粒度结构以及通过应用最近的基于图的NLP方法的其他会话特征来扩展最先进的方法。对于主题分割,我们提出了两个新的无监督模型,利用细粒度的会话结构,和一个新的图论监督模型,结合词汇,会话和主题功能。对于主题标签,我们提出了两种新的(无监督)随机游走模型,分别从两个不同的来源捕获会话特定的线索:领导的句子和细粒度的会话结构。经验评估表明,我们最好的模型所执行的分割和标记击败了最先进的技术,并且与人类注释高度相关。

英文摘要:

Topic segmentation and labeling is often considered a prerequisite for higher-level conversation analysis and has been shown to be useful in many Natural Language Processing (NLP) applications. We present two new corpora of email and blog conversations annotated with topics, and evaluate annotator reliability for the segmentation and labeling tasks in these asynchronous conversations. We propose a complete computational framework for topic segmentation and labeling in asynchronous conversations. Our approach extends state-of-the-art methods by considering a fine-grained structure of an asynchronous conversation, along with other conversational features by applying recent graph-based methods for NLP. For topic segmentation, we propose two novel unsupervised models that exploit the fine-grained conversational structure, and a novel graph-theoretic supervised model that combines lexical, conversational and topic features. For topic labeling, we propose two novel (unsupervised) random walk models that respectively capture conversation specific clues from two different sources: the leading sentences and the fine-grained conversational structure. Empirical evaluation shows that the segmentation and the labeling performed by our best models beat the state-of-the-art, and are highly correlated with human annotations.

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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