Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (2): 153-159.DOI: 10.12068/j.issn.1005-3026.2021.02.001

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Abnormal Condition Recognition Based on Improved Subjective Bayesian Method for Fused Magnesium Furnace

YUAN Jie1, WANG Shu1,2, WANG Fu-li1,2, SUN Xiao-hui3   

  1. 1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China; 2. State Key Laboratory of Synthetical Automation for Process Industries, Northeastern University, Shenyang 110819, China; 3. Tianlai Security Risk Management Technology Co., Ltd., Dalian 116600, China.
  • Published:2021-03-05
  • Contact: WANG Fu-li
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Abstract: It is difficult for big data analysis to be applied to the smelting process of fused magnesium furnace because of a lot of uncertain information of the process. In order to identify abnormal conditions accurately, an online rule reasoning method based on improved subjective Bayesian is proposed. In view of the problem that the parameter value range of the traditional subjective Bayesian method is too wide, the mapping function is used to limit the value range to a finite interval, which improves the practicability of the method. In order to improve the robustness and accuracy of condition recognition, the fuzzy membership function is utilized to match the observation and evidence in the reasoning. Simulation results show that the method can effectively describe the uncertain information in the rules and accurately identify the abnormal conditions in the smelting process of fused magnesium furnace.

Key words: fused magnesium furnace; abnormal condition recognition; subjective Bayesian; uncertain reasoning; fuzzy function

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