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This paper addresses the issue of web information extraction to support automatic teacher information management. We propose an effective approach based on block segmentation. First, the teacher introduction web pages are divided into independent blocks, where html tags and punctuation marks are used as segmentation criterion. Then CRF model is employed to label the text. We apply this approach on...
Topic-oriented search engine (topic-search) is a new IR service which provides compounded types of information with certain user queried topic in one page. It firstly categorizes user query into a certain domain, and then organizes several types of information based on the query keywords into a magazine-style topic page for user. In this paper, we propose a Chinese topic-oriented search engine service,...
Temporal information is an important characteristic of event. It can be used in information retrieval process to organize the returned result. In Chinese, the presentations of time expression are very complex, which make it difficult to both accurately recognize a time expression and precisely connecting it with a given event in a Web page that contains multiple events. To address these problems,...
User information need detection is a fundamental issue in automatic question answering systems. Based on real questions collected from on-line question answering communities, this paper proposes a three-level question type taxonomy to model user information need. The three levels are based on interrogative patterns, hidden user intentions and specific answer expectations. One question can have multiple...
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