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- W2749455574 abstract "The additions of oxygen and zinc oxide for the goethite process determine the cost and efficiency of the iron precipitation process. As the two production targets (cost and efficiency) are conflicting and the chemical reaction is a continuous process that changes over time, the amounts of additive need to be dynamically optimized to satisfy the requirement of industrial application. In this paper, a discretization method based on control variables and control intervals is proposed to transform the dynamic optimization problem to a nonlinear mathematical programming problem. Then, a multi-objective optimization approach based on the state transition algorithm and constrained nondominated sorting is proposed to find the Pareto optimal solutions. Finally, an evaluation mechanism is proposed to obtain the best solution for industrial applications. The results from a series of simulation experiments show the effectiveness of the proposed approach, e.g. the daily average additions of oxygen and zinc oxide are decreased by 778.0854 m3 and 4.9013 t, respectively." @default.
- W2749455574 created "2017-08-31" @default.
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- W2749455574 date "2017-11-01" @default.
- W2749455574 modified "2023-10-16" @default.
- W2749455574 title "Dynamic multi-objective optimization arising in iron precipitation of zinc hydrometallurgy" @default.
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- W2749455574 doi "https://doi.org/10.1016/j.hydromet.2017.08.007" @default.
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