Aiming at online testing of concentration of sodium aluminate solution in evaporation process of alumina production

a modeling method for concentration of sodium aluminate solution based on improved differential evolution algorithm and least squares support vector machine was proposed.The input variables of the soft sensor model were determined by analyzing process parameters based on grey relational analysis and kernel principal components analysis

and then the LSSVM model was established based on improved differential evolution algorithm and compared with DE-LSSVM soft sensor model.Finally

the experimental results of industrial production data of evaporation process showed that the new model had better learning ability and generalization performance and higher prediction accuracy

and could provide necessary guidance for the evaporation process operation optimization.