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Prediction of cooling efficiency of forced-air precooling systems based on optimized differential evolution and improved BP neural network

文献类型： 外文期刊

作者： Han, Jia-Wei 1 ; Li, Qing-Xue 1 ; Wu, Hua-Rui 1 ; Zhu, Hua-Ji 1 ; Song, Yu-Ling 4 ;

作者机构： 1.Beijing Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

2.Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

3.Beijing Acad Agr & Forestry Sci, Natl Engn Lab Agriprod Qual Traceabil, Beijing 100097, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Agr Internet Things, Yangling 712100, Shaanxi, Peoples R China

关键词： Differential evolution; Back-propagation; Forced-air cooling; Cold chain; Sensitivity analysis

期刊名称：APPLIED SOFT COMPUTING （ 影响因子：6.725； 五年影响因子：6.607 ）

ISSN： 1568-4946

年卷期： 2019 年 84 卷

页码：

收录情况： SCI

摘要： This paper proposes an approach to predict the efficiency of forced-air cooling of fresh apples that combines the optimized differential evolution (DE) algorithm and the back-propagation (BP) neural network algorithm. First, to balance population diversity and fast convergence, the individual mutation operation of the basic DE algorithm was optimized by dividing the entire population into two equal parts according to the fitness value of individuals, and DE-best-1 and DE-current-to-rand-1 are used as individual mutation operations for the superior- and inferior-part individuals, respectively. Moreover, the selection operation of basic DE was also changed by using a crowding scheme, which helps maintain population diversity and discover more regions containing the global optima. Second, an optimized DE-BP neural network model was established by using the optimized DE to determine the initial weights and thresholds of the BP neural network to avoid being trapped in local minima, following which the effect of input parameters on the network output was subjected to a comprehensive sensitivity analysis based on the trained neural network. The results show that the optimized DE-BP model accurately predicts the efficiency with which apples are cooled. Furthermore, the airflow velocity and total opening area have a significant negative correlation with the average apple temperature and a positive correlation with the cooling rate of the apples. Finally, the most important factor influencing the cooling efficiency of the pre-cooling system is the total opening area of the ventilated packaging. (C) 2019 Elsevier B.V. All rights reserved.

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