基于句法路径的情感评价单元识别

摘要

Different from previous works such as hand-crafted patterns and rule based methods, this paper proposes a novel method that uses syntactic paths to automatically recognize the appraisal expressions.In detail, the syntactic paths are first automatically collected to describe the relationships between the polarity words and their corresponding targets.Next, an edit distance based syntactic path matching strategy is used to improve the performance of the exact syntactic path matching method.Experimental results on the camera and MP3 player domains show that (1) syntactic paths are helpful for appraisal expression recognition, and (2) edit distance based syntactic path matching method can further improve the performance of appraisal expression recognition.%不同于已有的基于手工模板和规则的方法,提出了一种基于句法路径的情感评价单元自动识别方法.该方法自动获取句法路径来描述评价对象及其评价词语之间的修饰关系,并通过计算句法路径编辑距离来改进情感评价单元抽取的系统性能.实验语料来自数码相机和MP3播放器两个典型的电子产品领域.实验结果表明:(1)句法路径能够有效描述评价对象及其评价词语之间的关系,对情感评价单元的识别有很大帮助;(2)基于编辑距离的句法路径改进策略能够进一步提高情感评价单元识别的系统性能.