In view of the hardship to get real—time and on—line biological parameters in fermentation process，a soft sensor model based on support vector machines is established for estimating the bio— logical parameters．The complexity and generalization performance of the support vector regression (SVR)model depend on a good setting of the three parameters ，c， ．An algorithm called parti— cle swarm optimization(PSO)is applied to optimize the three parameters synchronously．Based on the proposed method，a PSO—SVR model is developed to estimate the products concentration of beta— mannanase for feedstuf．The control results of fermenter show that the state estimation model based on PSO·-SVR has good learn ing accuracy and generalization perform ance SO as to obtain the real·-time and on—line estimation for products concentration of beta—mannanase．

PS0-SVR.PDF

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