To enable natural language interfaces to databases more efficient and robust,two kinds of techniques,language paraphrasing and result analyzing,are widely used to help users to understand the system's intermediate...To enable natural language interfaces to databases more efficient and robust,two kinds of techniques,language paraphrasing and result analyzing,are widely used to help users to understand the system's intermediate language,and the query result meaning in some times. For the limitation of intermediate language adopted in some NLIDBs ,they could not give efficient and practical paraphrasing algorithms. Based on semantic dependency tree in NChiql,we present a completed paraphrasing algorithm which is suitable to Chinese languages.展开更多
问答系统在MOOC(Massive Open Online Course)学习平台中占有很重要的地位,但由于MOOC课程学习中用户多、问题多的特点,快速准确地找到某一问题的答案,成为提升MOOC平台用户体验的一个挑战。为此,构建了面向常问问题集的问答系统,通过...问答系统在MOOC(Massive Open Online Course)学习平台中占有很重要的地位,但由于MOOC课程学习中用户多、问题多的特点,快速准确地找到某一问题的答案,成为提升MOOC平台用户体验的一个挑战。为此,构建了面向常问问题集的问答系统,通过计算问句的相似性实现系统的自动问答。在现有的句子相似性度量方法基础上,设计了基于语义依存关系的度量方法,并结合了句长、词形、词义等多种特征度量句子之间的相似性。实验结果表明,该方法能够较好地反映句子之间的语义差别,是一种可行有效的方法,且提高了系统的响应准确率。该系统具有较高应答准确率,具有较强使用价值和广阔的应用前景。展开更多
文摘To enable natural language interfaces to databases more efficient and robust,two kinds of techniques,language paraphrasing and result analyzing,are widely used to help users to understand the system's intermediate language,and the query result meaning in some times. For the limitation of intermediate language adopted in some NLIDBs ,they could not give efficient and practical paraphrasing algorithms. Based on semantic dependency tree in NChiql,we present a completed paraphrasing algorithm which is suitable to Chinese languages.
文摘问答系统在MOOC(Massive Open Online Course)学习平台中占有很重要的地位,但由于MOOC课程学习中用户多、问题多的特点,快速准确地找到某一问题的答案,成为提升MOOC平台用户体验的一个挑战。为此,构建了面向常问问题集的问答系统,通过计算问句的相似性实现系统的自动问答。在现有的句子相似性度量方法基础上,设计了基于语义依存关系的度量方法,并结合了句长、词形、词义等多种特征度量句子之间的相似性。实验结果表明,该方法能够较好地反映句子之间的语义差别,是一种可行有效的方法,且提高了系统的响应准确率。该系统具有较高应答准确率,具有较强使用价值和广阔的应用前景。