Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties

Uncertainties exist and affect the actual port production. For example, at the beginning of 2020, the sudden outbreak of COVID-19 seriously affected terminal production and increased the short-term pressure of handling at container terminals. Consequently, a large number of containers were stacked a...

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Autores principales:	Bowei Xu, Yuqing Wang, Junjun Li
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/543793d325674a54b2615bc25f2568c1
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spelling	oai:doaj.org-article:543793d325674a54b2615bc25f2568c12021-11-22T01:11:40ZOptimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties1607-887X10.1155/2021/3977984https://doaj.org/article/543793d325674a54b2615bc25f2568c12021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/3977984https://doaj.org/toc/1607-887XUncertainties exist and affect the actual port production. For example, at the beginning of 2020, the sudden outbreak of COVID-19 seriously affected terminal production and increased the short-term pressure of handling at container terminals. Consequently, a large number of containers were stacked at terminals, and the problem of terminal congestion became more serious. To solve the congestion problem of container terminals and ensure the priority dispatch of emergency materials, this study uses the optimized arrival patterns of external trucks and a priority dispatch strategy for emergency materials to establish a bilevel optimization model for container terminals and proposes a chaotic genetic algorithm based on logistic mapping as a solution. Through numerical experiments, the algorithm proposed in this study was compared with the genetic algorithm and adaptive genetic algorithm. The experimental results show that the model and algorithm proposed in this study can effectively reduce the total cost of containers in a terminal while ensuring the priority dispatch of emergency materials, reducing the overlapping part of the time window, optimizing the arrival mode of external trucks, and reducing the waiting time of external trucks, effectively alleviating the terminal congestion problem.Bowei XuYuqing WangJunjun LiHindawi LimitedarticleMathematicsQA1-939ENDiscrete Dynamics in Nature and Society, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Mathematics QA1-939
spellingShingle	Mathematics QA1-939 Bowei Xu Yuqing Wang Junjun Li Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
description	Uncertainties exist and affect the actual port production. For example, at the beginning of 2020, the sudden outbreak of COVID-19 seriously affected terminal production and increased the short-term pressure of handling at container terminals. Consequently, a large number of containers were stacked at terminals, and the problem of terminal congestion became more serious. To solve the congestion problem of container terminals and ensure the priority dispatch of emergency materials, this study uses the optimized arrival patterns of external trucks and a priority dispatch strategy for emergency materials to establish a bilevel optimization model for container terminals and proposes a chaotic genetic algorithm based on logistic mapping as a solution. Through numerical experiments, the algorithm proposed in this study was compared with the genetic algorithm and adaptive genetic algorithm. The experimental results show that the model and algorithm proposed in this study can effectively reduce the total cost of containers in a terminal while ensuring the priority dispatch of emergency materials, reducing the overlapping part of the time window, optimizing the arrival mode of external trucks, and reducing the waiting time of external trucks, effectively alleviating the terminal congestion problem.
format	article
author	Bowei Xu Yuqing Wang Junjun Li
author_facet	Bowei Xu Yuqing Wang Junjun Li
author_sort	Bowei Xu
title	Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
title_short	Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
title_full	Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
title_fullStr	Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
title_full_unstemmed	Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties
title_sort	optimization of port emergency materials dispatch with time windows constraints under uncertainties
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/543793d325674a54b2615bc25f2568c1
work_keys_str_mv	AT boweixu optimizationofportemergencymaterialsdispatchwithtimewindowsconstraintsunderuncertainties AT yuqingwang optimizationofportemergencymaterialsdispatchwithtimewindowsconstraintsunderuncertainties AT junjunli optimizationofportemergencymaterialsdispatchwithtimewindowsconstraintsunderuncertainties
_version_	1718418281949298688

Optimization of Port Emergency Materials Dispatch with Time Windows Constraints under Uncertainties

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