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Li, Dong; Liu, Yiqi; Huang, Daoping; Lui, Chun Fai; Xie, Min
IEEE transactions on instrumentation and measurement, 01/2023, Letnik: 72Journal Article
Data-driven soft sensors are usually used to predict quality-related but hard-to-measure variables in industrial systems. However, the acceptable prediction performance mainly relies on the premise that training data are sufficient for model training. To acquire more training data, this paper proposes an adversarial transfer learning (ATL) methodology to enhance soft sensor learning. Firstly, a hierarchical transfer learning algorithm, which integrates a feature extraction method with model-based transfer learning, is proposed to refine the useful hidden information from both historical variables and samples. Then, a novel adversarial learning network is designed to prevent the deterioration of transferred results at each transfer learning stage. Thirdly, a Granger causality analysis (GCA)-based rationale analyzer is added to unfold the internal causality among input variables and between input and output variables simultaneously. Finally, the effectiveness of the proposed soft sensor and the rationale analyzer is validated in a simulated wastewater plant, Benchmark Simulation Model No.2 (BSM2), and a full-scale oxidation ditch (OD) wastewater plant. The experimental results demonstrate that the ATL-based soft sensor can achieve more accurate prediction in terms of RMSE and R, and the GCA-based rationale analyzer can provide a visual explanation for the corresponding model and prediction results.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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