| 信息检索中主题式词典的构建方法 |
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| 引用本文： | 许静芳,李星,李粤.信息检索中主题式词典的构建方法[J].计算机工程,2005,31(21):143-145. |
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| 作者姓名： | 许静芳 李星 李粤 |
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| 作者单位： | 清华大学电子工程系,北京,100084;清华大学电子工程系,北京,100084;清华大学电子工程系,北京,100084 |
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| 摘 要： | 提出了一种基于用户查询日志的主题式词典的构建方法，用于中文信息检索中分词。利用互信息从用户查询日志中提取短语并与通用词典相结合构建主题式词典。该词典能提高信息检索的准确率和效率，并有助于解决未登录词问题。
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| 关 键 词： | 主题式词典 信息检索 中文分词 短语提取 |
| 文章编号： | 1000-3428（2005）21-0143-03 |
| 收稿时间： | 2004-09-21 |
| 修稿时间： | 2004-09-21 |
A Topic-specific Dictionary Construction Algorithm for Information Retrieval |
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| XU Jingfang,LI Xing,LI Yue.A Topic-specific Dictionary Construction Algorithm for Information Retrieval[J].Computer Engineering,2005,31(21):143-145. |
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| Authors: | XU Jingfang LI Xing LI Yue |
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| Affiliation: | Department of Electronics Engineering, Tsinghua University, Beijing 100084 |
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| Abstract: | This paper proposes a novel algorithm to construct a topic-specific dictionary, based on user query log, for information retrieval, According to their mutual information, phrases are extracted from the log and they are combined with a general dictionary to construct a topic-specific dictionary. The experiment result shows that the constructed dictionary greatly improves the retrieval performance and helps to detect many out-of-vocabulary words. |
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| Keywords: | Topic-specific dictionary Information retrieval Chinese word segmentation Phrase extraction |
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