Multiple quay cranes scheduling for double cycling in container terminals

At a container port, container vessels are served by quay cranes for loading and unloading containers. Each vessel is typically split into bays from head to tail where containers are stored. Parallel quay cranes can process different bays simultaneously, and their processing efficiency significantly affects the turn-around time of a container vessel. Sharing a single traveling rail, the quay cranes cannot crossover each other, and this phenomenon is referred as the non-crossing constraint. In addition, the quay cranes may have different processing speeds due to gradual equipment updates. Inspired by updating activities of cranes in modern container terminals, this paper studies a scheduling problem with two uniform quay cranes, aiming at minimizing the turn-around time of a vessel, i.e., the makespan. We mainly develop an integrated approximation algorithm which is [Formula: see text]-approximation, where the two quay cranes are of processing speeds 1 and [Formula: see text], respectively.

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A New Dispatching Model of Automated Lifting Vehicles in Automated Container Terminal with Limited Buffer Space

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.446-447.1334 ◽

2013 ◽

Vol 446-447 ◽

pp. 1334-1339 ◽

Cited By ~ 1

Author(s):

Seyed Hamidreza Sadeghian ◽

Mohd Khairol Anuar Bin Mohd Ariffin ◽

Say Hong Tang ◽

Napsiah Binti Ismail

Keyword(s):

Programming Model ◽

Container Terminal ◽

Container Terminals ◽

Mixed Integer ◽

Transport Systems ◽

Buffer Space ◽

Integrated Scheduling ◽

Quay Cranes ◽

Automated Lifting Vehicle ◽

Large Container

Automation of the processes at the quays of the world's large container ports is one of the answers to the required ever-increasing transshipment volumes within the same timeframe. For such purpose, using new generation of vehicles is unavoidable. One of the automatic vehicles that can be used in container terminals is Automated Lifting Vehicle (ALV). Integrated scheduling of handling equipments with quay cranes can increase the efficiency of automated transport systems in container. In this paper, an integrated scheduling of quay cranes and automated lifting vehicles with limited buffer space is formulated as a mixed integer linear programming model. This model minimizes the makespan of all the loading and unloading tasks for a pre-defined set of cranes in a scheduling problem.

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Integration and Optimization of Quay Cranes and Trucks at Container Terminals

CICTP 2014 ◽

10.1061/9780784413623.302 ◽

2014 ◽

Author(s):

Qing-yu Zhao ◽

Jin-xin Cao ◽

Li-hua Chen

Keyword(s):

Container Terminals ◽

Quay Cranes

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Performance Analysis on Transfer Platforms in Frame Bridge Based Automated Container Terminals

Mathematical Problems in Engineering ◽

10.1155/2013/593847 ◽

2013 ◽

Vol 2013 ◽

pp. 1-8 ◽

Cited By ~ 2

Author(s):

Hongtao Hu ◽

Byung Kwon Lee ◽

Youfang Huang ◽

Loo Hay Lee ◽

Ek Peng Chew

Keyword(s):

Markov Chain ◽

Performance Analysis ◽

Markov Chain Model ◽

Container Terminal ◽

Container Terminals ◽

Automated Guided Vehicles ◽

Chain Model ◽

Quay Cranes ◽

Automated Container Terminal ◽

Multistory Frame

This paper studies a new automated container terminal (ACT) system which utilizes multistory frame bridges and rail-mounted trolleys to transport containers between the quay and the yard. Beside typical ACT systems use trucks or automated guided vehicles for transporting containers between quay cranes and yard cranes, the new design uses three types of handling machines, namely, ground trolleys (GTs), transfer platforms (TPs), and frame trolleys (FTs). These three types of handling machines collaborate with one another to transport containers. This study decomposes the system into several subsystems. Each subsystem has one TP and several FTs and GTs dedicated to this TP. Then, a Markov chain model is developed to analyze the throughput of TPs. At last, the performance of the new ACT system is estimated. Sensitivity analyzes the numbers, and the processing rates of trolleys are conducted through the numeric experiments.

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A new method for allocating berths, quay cranes and internal trucks in container terminals

2015 International Conference on Logistics, Informatics and Service Sciences (LISS) ◽

10.1109/liss.2015.7369644 ◽

2015 ◽

Cited By ~ 1

Author(s):

A. Karam ◽

A.B. Eltawil

Keyword(s):

Container Terminals ◽

New Method ◽

Quay Cranes

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The Influence of Yard Trucks on Berth Operations in Smaller Container Terminals

Pomorstvo ◽

10.31217/p.33.2.6 ◽

2019 ◽

Vol 33 (2) ◽

pp. 171-175

Author(s):

Maja Stojaković ◽

Elen Twrdy

Keyword(s):

Waiting Times ◽

Container Terminals ◽

Extreme Pressure ◽

Simulation Approach ◽

Horizontal Transport ◽

Good Level ◽

Quay Cranes ◽

Pressure Form

Nowadays smaller container terminals are facing an increase in traffic and ship sizes and are consequently subject to extreme pressure form ship-owners that require rapid and efficient transhipment operations in the port, the achievement of which is only possible with the assignment of the proper type and number of quay cranes to each ship and with a good level of synergy between the cranes and the transfer mechanisation. The latter has a significant impact on the cranes working and waiting times and affects the entirety of berth operations. Existing terminals that cannot afford to invest in new modern horizontal transport technologies are most commonly using yard trucks that provide less efficient port transfer operations. That is why in the paper a simulation approach has been used in order to determine how a different number of yard trucks assigned to a single quay crane can affect the productivity of that crane and the productivity of the whole berth subsystem.

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