Extracting Fine-grained Knowledge Units from Texts with Deep Learning

被引:0
作者
Yu L. [1 ,3 ]
Qian L. [1 ,2 ]
Fu C. [1 ]
Zhao H. [1 ]
机构
[1] National Science Library, Chinese Academy of Sciences, Beijing
[2] Department of Library, Information and Achieve Management, University of Chinese Academy of Sciences, Beijing
[3] State Key Laboratory of Resources and Environmental Information System, Beijing
关键词
Bootstrapping; Deep Learning; Knowledge Unit Extraction; LSTM-CRF; Named Entity Recognition;
D O I
10.11925/infotech.2096-3467.2018.1352
中图分类号
学科分类号
摘要
[Objective] This paper tries to extract fine-grained knowledge units from texts with a deep learning model based on the modified bootstrapping method. [Methods] First, we built the lexicon for each type of knowledge unit with the help of search engine and keywords from Elsevier. Second, we created a large annotated corpus based on the bootstrapping method. Third, we controlled the quality of annotation with the estimation models of patterns and knowledge units. Finally, we trained the proposed LSTM-CRF model with the annotated corpus, and extracted new knowledge units from texts. [Results] We retrieved four types of knowledge units (study scope, research method, experimental data, as well as evaluation criteria and their values) from 17,756 ACL papers. The average precision was 91%, which was calculated manually. [Limitations] The parameters of models were pre-defined and modified by human. More research is needed to evaluate the performance of this method with texts from other domains. [Conclusions] The proposed model effectively addresses the issue of semantic drifting. It could extract knowledge units precisely, which is an effective solution for the big data acquisition process of intelligence analysis. © 2019 Chinese Academy of Sciences. All rights reserved.
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收藏
页码:38 / 45
页数:7
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