汉语问答系统答案提取方法研究

答案提取是问答系统的关键部分，文章介绍了汉语问答系统的基本结构及其实现过程，以问题和答案中关键词的词频统计特性为基础，进一步考虑问题和句子中关键词位置分布信息，提出了一种结合向量空间模型（VSM）和关键词最小匹配距离的问题和句子相似度的计算方法。并以相似度为基础，结合问题类别，对汉语基于事实的简单陈述问题进行了答案句子提取实验，结果表明该方法有较好的效果。

Research on Answer Extracting for Chinese Question-answering System

Answer extracting is the key part of question-answering system.The basic structure and realization of Chinese question-answering system are introduced.Based on the statistic feature of keyword frequency,the distribution of keywords in question and sentence is considered.And a similarity computation method between question and sentence,which combines vector space model(VSM) and keyword minimal matching span is proposed.According to question type and the similarity calculated above,answer-extracting experiment for Chinese factoid question is done.The experiment result shows that the method presented in this paper gets a very good effect.