Cross-Domain and Semisupervised Named Entity Recognition in Chinese Social Media: A Unified Model
Cross-Domain and Semisupervised Named Entity Recognition in Chinese Social Media: A Unified Model
复制标题
中国社交媒体中的跨域半监督命名实体识别:统一模型
DOI:
10.1109/taslp.2018.2856625
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发表时间:
2018-11
影响因子:
5.4
通讯作者:
Li Sujian
中科院分区:
文献类型:
--
作者:
Xu Jingjing;He Hangfeng;Sun Xu;Ren Xuancheng;Li Sujian
Named entity recognition (NER) in Chinese social media is an important, but challenging task because Chinese social media language is informal and noisy. Most previous methods on NER focus on in-domain supervised learning, which is limited by scarce annotated data in social media. In this paper, we present that sufficient corpora in formal domains and massive unannotated text can be combined to improve the NER performance in social media. We propose a unified model which can learn from out-of-domain corpora and in-domain unannotated text. The unified model is composed of two parts. One is for cross-domain learning and the other is for semisupervised learning. Cross-domain learning can learn out-of-domain information based on domain similarity. Semisupervised learning can learn in-domain unannotated information by self-training. Experimental results show that our unified model yields a 9.57% improvement over strong baselines and achieves the state-of-the-art performance.1
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