A new hazard event classification model via deep learning and multifractal

TL;DR

This paper introduces a novel deep learning framework utilizing multifractal analysis for classifying hazard events in industrial safety, improving accuracy in severity, possibility, and risk assessments.

Contribution

The study presents a new hierarchical gating neural network combined with multifractal analysis and BERT-based vectorization for hazard event classification, a novel approach in this domain.

Findings

DLF classifier outperforms other classifiers in precision, recall, and F1-score.

HmF-DFA and HGNN enhance hazard event classification accuracy.

System supports industrial safety decision-making and risk assessment.

Abstract

Hazard and operability analysis (HAZOP) is the paradigm of industrial safety that can reveal the hazards of process from its node deviations, consequences, causes, measures and suggestions, and such hazards can be considered as hazard events (HaE). The classification research on HaE has much irreplaceable pragmatic values. In this paper, we present a novel deep learning model termed DLF through multifractal to explore HaE classification where the motivation is that HaE can be naturally regarded as a kind of time series. Specifically, first HaE is vectorized to get HaE time series by employing BERT. Then, a new multifractal analysis method termed HmF-DFA is proposed to win HaE fractal series by analyzing HaE time series. Finally, a new hierarchical gating neural network (HGNN) is designed to process HaE fractal series to accomplish the classification of HaE from three aspects: severity, possibility and risk. We take HAZOP reports of 18 processes as cases, and launch the experiments on this basis. Results demonstrate that compared with other classifiers, DLF classifier performs better under metrics of precision, recall and F1-score, especially for the severity aspect. Also, HmF-DFA and HGNN effectively promote HaE classification. Our HaE classification system can serve application incentives to experts, engineers, employees, and other enterprises. We hope our research can contribute added support to the daily practice in industrial safety.