arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1808.05906cs.CLcs.IRcs.LGstat.ML
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Story Disambiguation:在新闻和社交媒体流中跟踪不断发展的新闻故事

Story Disambiguation: Tracking Evolving News Stories across News and Social Streams

Insight Centre for Data Analytics(洞察数据分析中心);University College Dublin(都柏林大学学院)

Bichen Shi, Thanh-Binh Le, Neil Hurley, Georgiana Ifrim

摘要:

在线跟踪特定新闻故事是一项重要但困难的任务,因为相关信息通常分散在不同的域/源(例如,新闻文章、博客、评论、推文),以各种格式和语言风格呈现,并且可能与数千个其他故事重叠。在这项工作中,我们加入了主题跟踪和实体消歧领域,并提出了一个框架命名为故事消歧-一个跨域的故事跟踪方法,建立在实时实体消歧和学习排名框架,以表示和更新丰富的语义结构的新闻故事。给定一个目标新闻故事,由一组种子文档指定,目标是从传入的文档流中有效地选择新的故事相关文档。我们将故事表示为实体图,并将故事跟踪问题建模为学习排名任务。这使我们能够从多个领域实时跟踪高精度的内容。我们研究了一系列基于文本,实体和图形的功能,以了解哪种类型的功能是最有效的代表故事。我们进一步提出了新的半监督学习技术,随着时间的推移自动更新的故事表示。我们的实证研究表明,我们优于国家的最先进的方法跟踪混合域文档流的准确性,同时需要更少的标记数据种子跟踪的故事。这对于容易被其他趋势故事遮蔽的本地新闻故事以及在嘈杂的流环境中具有模糊内容的复杂新闻故事来说尤其如此。

英文摘要:

Following a particular news story online is an important but difficult task, as the relevant information is often scattered across different domains/sources (e.g., news articles, blogs, comments, tweets), presented in various formats and language styles, and may overlap with thousands of other stories. In this work we join the areas of topic tracking and entity disambiguation, and propose a framework named Story Disambiguation - a cross-domain story tracking approach that builds on real-time entity disambiguation and a learning-to-rank framework to represent and update the rich semantic structure of news stories. Given a target news story, specified by a seed set of documents, the goal is to effectively select new story-relevant documents from an incoming document stream. We represent stories as entity graphs and we model the story tracking problem as a learning-to-rank task. This enables us to track content with high accuracy, from multiple domains, in real-time. We study a range of text, entity and graph based features to understand which type of features are most effective for representing stories. We further propose new semi-supervised learning techniques to automatically update the story representation over time. Our empirical study shows that we outperform the accuracy of state-of-the-art methods for tracking mixed-domain document streams, while requiring fewer labeled data to seed the tracked stories. This is particularly the case for local news stories that are easily over shadowed by other trending stories, and for complex news stories with ambiguous content in noisy stream environments.

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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