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Multiple Model Soft Sensor Based on Affinity Propagation,Gaussian Process and Bayesian Committee Machine

LI Xiuliang,SU Hongye and CHU Jian National Key Laboratory of Industrial Control Technology,Institute of Cyber-Systems and Control,Zhejiang University,Hangzhou 310027,China  
Presented is a multiple model soft sensing method based on Affinity Propagation(AP),Gaussian process(GP) and Bayesian committee machine(BCM).AP clustering arithmetic is used to cluster training samples according to their operating points.Then,the sub-models are estimated by Gaussian Process Regression(GPR).Finally,in order to get a global probabilistic prediction,Bayesian committee machine is used to combine the outputs of the sub-estimators.The proposed method has been applied to predict the light naphtha end point in hydrocracker fractionators.Practical applications indicate that it is useful for the online prediction of quality monitoring in chemical processes.
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