Aiming at the problems of low accuracy and poor robustness that existed in the current hot rolling strip width spread model,an improved strip spread prediction model based on a material forming mechanism and Bayesian ...Aiming at the problems of low accuracy and poor robustness that existed in the current hot rolling strip width spread model,an improved strip spread prediction model based on a material forming mechanism and Bayesian optimized adaptive differential evolution algorithm(BADE)was proposed.At first,we improved the original spread mechanism model by adding the weight and bias term to enhance the model robustness based on rolling temperature.Then,the BADE algorithm was proposed to optimize the improved spread mechanism model.The optimization algorithm is based on a novel adaptive differential evolution algorithm,which can effectively achieve the global optimal solution.Finally,the prediction performances of five machine learning algorithms were compared in experiments.The results show that the prediction accuracy of the improved spread model is obviously better than that of the machine learning algorithms,which proves the effectiveness of the proposed method.展开更多
The prediction of the peak width at half height is an important aspect in the optimization of the chromatographic operating conditions.In this paper,a linear relationship,between the peak widths at half height and the...The prediction of the peak width at half height is an important aspect in the optimization of the chromatographic operating conditions.In this paper,a linear relationship,between the peak widths at half height and the retention values with various isocratic elution is observed.In gradient elution,however,the relationship between the peak widths at half height and the so-called invented retention values that correspond to the mobile phase composition by eluting the solute from the column end is developed.We believe that there is almost the same band width at half height inside the column (in unit of length)for different solutes.The peak width at half height in the chromatogram(in unit of time)is mainly determined by the capacity factor of the solute when it is eluted front the column end.The larger the capacity factor of a solute eluted from the column end,the more slowly will be the solute eluted from the column end and the wider will be the peak width at half height.It is possible to predict the peak width at half height in various isocratic and gradient elutions by using this linear relationship.展开更多
基金support from National Natural Science Foundation of China(Grant Nos.61633019,61533013 and 62273234).
文摘Aiming at the problems of low accuracy and poor robustness that existed in the current hot rolling strip width spread model,an improved strip spread prediction model based on a material forming mechanism and Bayesian optimized adaptive differential evolution algorithm(BADE)was proposed.At first,we improved the original spread mechanism model by adding the weight and bias term to enhance the model robustness based on rolling temperature.Then,the BADE algorithm was proposed to optimize the improved spread mechanism model.The optimization algorithm is based on a novel adaptive differential evolution algorithm,which can effectively achieve the global optimal solution.Finally,the prediction performances of five machine learning algorithms were compared in experiments.The results show that the prediction accuracy of the improved spread model is obviously better than that of the machine learning algorithms,which proves the effectiveness of the proposed method.
基金This work was supported by the Foundation of Chinese Academy of Sciences.
文摘The prediction of the peak width at half height is an important aspect in the optimization of the chromatographic operating conditions.In this paper,a linear relationship,between the peak widths at half height and the retention values with various isocratic elution is observed.In gradient elution,however,the relationship between the peak widths at half height and the so-called invented retention values that correspond to the mobile phase composition by eluting the solute from the column end is developed.We believe that there is almost the same band width at half height inside the column (in unit of length)for different solutes.The peak width at half height in the chromatogram(in unit of time)is mainly determined by the capacity factor of the solute when it is eluted front the column end.The larger the capacity factor of a solute eluted from the column end,the more slowly will be the solute eluted from the column end and the wider will be the peak width at half height.It is possible to predict the peak width at half height in various isocratic and gradient elutions by using this linear relationship.
