首页|Real-time risk prediction of chemical processes based on attention-based Bi-LSTM
Real-time risk prediction of chemical processes based on attention-based Bi-LSTM
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
Real-time risk prediction of chemical processes based on attention-based Bi-LSTM
Refined risk prediction must be achieved to guarantee the safe and steady operation of chemical pro-duction processes.However,there is high nonlinearity and association coupling among massive,complicated multisource process data,resulting in a low accuracy of existing prediction technology.For that reason,a real-time risk prediction method for chemical processes based on the attention-based bidirectional long short-term memory(Attention-based Bi-LSTM)is proposed in this study.First,multisource process data,such as temperature,pressure,flow rate,and liquid level,are preprocessed for denoising.Data correlation is analyzed in time windows by setting time windows and moving step lengths to explore correlations,thus establishing a complex network model oriented to the chemical production process.Second,network structure entropy is introduced to reduce the dimensions of the multisource process data.Moreover,a 1D relative risk sequence is acquired by max-min deviation standardization to judge whether the chemical process is in a steady state.Finally,an Attention-based Bi-LSTM algorithm is established by integrating the attention mechanism and the Bi-LSTM network to fit and train 1D relative risk sequences.In that way,the proposed algorithm achieves real-time prediction and intelligent perception of risk states during chemical production.A case study based on the Tennessee Eastman process(TEP)is conducted.The validity and reasonability of the proposed method are verified by analyzing distribution laws of relative risks under normal and fault conditions.Also,the proposed algorithm importantly improves the prediction accuracy of chemical process risks relative to that of existing prediction technologies.
Chemical processesPredictionNeural networksNetwork structure entropyRelative risk sequence
Qianlin Wang、Jiaqi Han、Feng Chen、Xin Zhang、Cheng Yun、Zhan Dou、Tingjun Yan、Guoan Yang
展开 >
College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China
College of Mechanical and Transportation Engineering,China University of Petroleum,Beijing 102249,China
Instrumentation Technology and Economy Institute,Beijing 100055,China
万方数据
维普
