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Supervised Multi-Layer Conditional Variational Auto-Encoder for Process Modeling and Soft Sensor
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Supervised Multi-Layer Conditional Variational Auto-Encoder for Process Modeling and Soft Sensor
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Journal Article
Supervised Multi-Layer Conditional Variational Auto-Encoder for Process Modeling and Soft Sensor
2023
Overview
Variational auto-encoders (VAE) have been widely used in process modeling due to the ability of deep feature extraction and noise robustness. However, the construction of a supervised VAE model still faces huge challenges. The data generated by the existing supervised VAE models are unstable and uncontrollable due to random resampling in the latent subspace, meaning the performance of prediction is greatly weakened. In this paper, a new multi-layer conditional variational auto-encoder (M-CVAE) is constructed by injecting label information into the latent subspace to control the output data generated towards the direction of the actual value. Furthermore, the label information is also used as the input with process variables in order to strengthen the correlation between input and output. Finally, a neural network layer is embedded in the encoder of the model to achieve online quality prediction. The superiority and effectiveness of the proposed method are demonstrated by two real industrial process cases that are compared with other methods.
Publisher
MDPI AG
Subject
