国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Tube cracking is the main technology in ethylene production and the quality index is influenced by many variables.Too many variables will obviously result in the increase of complication and difficulty of model structure.Besides,a lot of redundant information will reduce the accuracy of the model.To solve the problem,an algorithm based on chaotic and discrete PSO was proposed in this paper.Optimal input variable combination of ethylene production process is obtained by chaotic and discrete PSO algorithm.Then the model is set up based on the selected variables by PLS algorithm.The results show that the algorithm can make particles avoid falling into local optimum and get a higher accuracy model.