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| 基于特定问题类别的汉语问答系统查询扩展 | |
| 引用本文： | 余正涛,樊孝忠,宋丽荣.基于特定问题类别的汉语问答系统查询扩展[J].北京理工大学学报,2005,25(10):880-884. |
| 作者姓名： | 余正涛 樊孝忠 宋丽荣 |
| 作者单位： | 1. 北京理工大学,信息科学技术学院计算机科学工程系,北京,100081;昆明理工大学,信息工程与自动化学院,云南,昆明,650051 2. 北京理工大学,信息科学技术学院计算机科学工程系,北京,100081 3. 北京理工大学,人文社会科学学院,北京,100081 |
| 基金项目： | 云南省信息技术专项基金 |
| 摘 要： | 针对汉语问答系统的特点,提出一种通过统计问答对方式获得各种问题类别的关联词,并根据类别关联词进行查询扩展的方法.在计算问题和答案文本相似度时,实现了一种基于最小匹配距离的计算方法,该方法充分考虑了查询词及查询扩展词在文本中的词频及位置分布信息.实验结果说明在汉语问答系统答案文本检索中,按照问题类别关联词进行查询扩展比未进行查询扩展在性能上有很大的改进. |
| 关 键 词： | 汉语问答系统 查询扩展 问题类别 类别关联词 答案文本检索 最小匹配距离 问题类别 汉语问答系统 查询扩展 System Question Answering Chinese Specific Expansion 改进 性能 答案文本检索 结果 实验 分布信息 位置 词频 计算方法 最小匹配距离 文本相似度 计算问题 |
| 文章编号： | 1001-0645(2005)10-0880-05 |
| 收稿时间： | 11 5 2004 12:00AM |
| 修稿时间： | 2004年11月5日 |
Query Expansion for Specific Question Types in Chinese Question Answering System |
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| YU Zheng-tao,FAN Xiao-zhong and SONG Li-rong.Query Expansion for Specific Question Types in Chinese Question Answering System[J].Journal of Beijing Institute of Technology(Natural Science Edition),2005,25(10):880-884. | |
| Authors: | YU Zheng-tao FAN Xiao-zhong and SONG Li-rong |
| Institution: | 1. Department of Computer Science and Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China;2. The School of Information Engineering and Automation, Kunming University of Science and Technology, Kunming, Yunnan 650051, China; 3. School of Humanities and Social Sciences, Beijing Institute of Technology, Beijing 100081, China |
| Abstract: | In connection with the characteristics of Chinese question answering systems,a method of query expansion is proposed.It is based on the related words for specific question types that are retrieved by pairing statistically the question-answering classes.A method of similarity between question and answering documents based on minimal matching span is implemented.The term frequency and position of information of query and query expansion in the document are fully considered in the computation.The experimental results show that in answering document retrieval of Chinese question answering system,the performance of expanding the query based on related words for specific question types is much better than in unexpanded query. |
| Keywords: | Chinese question answering system query expansion question type related words for specific question types answering document retrieval minimal matching span |
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