A Study on Standardization of Security Evaluation Information for Chemical Processes Based on Deep Learning

Processes

Yujie Bai¹  Dong Gao¹  Lanfei Peng¹ 

[1] School of Information Science and Technology, Beijing University of Chemical Technology, No. 15, North Third Ring East Road, Beijing 100029, China;

关键词: hazard and operability analysis;    named entity recognition;    neural network;    deep learning;   

DOI  :  10.3390/pr9050832

来源: DOAJ

【 摘 要 】

Hazard and operability analysis (HAZOP) is one of the most commonly used hazard analysis methods in the petrochemical industry. The large amount of unstructured data in HAZOP reports has generated an information explosion which has led to a pressing need for technologies that can simplify the use of this information. In order to solve the problem that massive data are difficult to reuse and share, in this study, we propose a new deep learning framework for Chinese HAZOP documents to perform a named entity recognition (NER) task, aiming at the characteristics of HAZOP documents, such as polysemy, multi-entity nesting, and long-distance text. Specifically, the preprocessed data are input into an embeddings from language models (ELMo) and a double convolutional neural network (DCNN) model to extract rich character features. Meanwhile, a bidirectional long short-term memory (BiLSTM) network is used to extract long-distance semantic information. Finally, the results are decoded by a conditional random field (CRF), and then output. Experiments were carried out using the HAZOP report of a coal seam indirect liquefaction project. The experimental results for the proposed model showed that the accuracy rate of the optimal results reached 90.83, the recall rate reached 92.46, and the F-value reached the highest 91.76%, which was significantly improved as compared with other models.

【 授权许可】

Unknown