微博观点句识别的话题影响研究

为了从海量的网络信息中迅速准确地获取评价信息,观点句识别已经成了自然语言处理的一个研究热点。现在观点句识别系统大都是基于机器学习的方法,一般使用机器学习的方法来进行分类会受到领域差异性影响。针对这个问题,该文对微博观点句识别系统是否会受到微博话题影响做了经验性研究,同时为了弥补训练数据的不足,该文通过规则方法自动标注网络数据进行了训练集的扩充。实验结果表明,微博话题间存在差异,进行分话题模型训练可以提升微博观点句识别系统的性能。

A Study on the Effects of Topics on an Opinion Sentences Identification System for Micro-blog Data

As an important stage for information extraction, the problem of Opinion Sentence Identification （OSI） has attracted more and more attentions from NLP researchers in the past decade. Similar to other areas in NLP, most current OSI systems are built based on machine learning （ML） technologies, which often suffer from the problem of domain/topic adaptation. In this pa-per, an empirical study was conducted to test whether the topic difference among the micro-blog data effects on the performance of an ML-based OSI system, which used rule-based automatic annotation methods to expand the training set. The experimental results indicated that by introducing a topic classifier and performing the training based on the sub topics, the performance of the OSI system for micro-blog data could be improved significantly.