As the “first service station” for ships in the whole port logistics system, the tugboat operation system is one of the most important systems in port logistics. This paper formulated the tugboat scheduling problem as a multiprocessor task scheduling problem MTSP after analyzing the characteristics of tugboat operation. The model considers factors of multianchorage bases, different operation mo...

An improved artificial fish swarm algorithm (AFSA) for solving a combinatorial optimization problem— a berth allocation problem (BAP), which was formulated. Its objective is to minimize the turnaround time of vessels at container terminals so as to improve operation efficiency customer satisfaction. An adaptive artificial fish swarm algorithm was proposed to solve it. Firstly, the basic princip...

The berth allocation problem (BAP) is an NP-hard in maritime traffic scheduling that significantly influences the operational efficiency of container terminal. This paper formulates BAP as a permutation-based combinatorial optimization and proposes improved ant colony system (ACS) algorithm to solve it. proposed ACS has three main contributions. First, adaptive heuristic information (AHI) mecha...

Mining companies have complex supply chains that start from the mining location and stretch thousands of kilometers to the end customer in a different country and continent. The logistics of moving the materials from mines to ship is composed of series of optimization problems like berth allocation, ship scheduling, stockyard scheduling, and rail scheduling, which are individually NP-hard. In t...

Berths and yards are the most critical parts of container terminals. Their efficiency directly influences terminal operation efficiency. The multi-period coordinated optimization on berth allocation yard assignment has been studied considering a interaction between yard. problem is formulated as an integer programming, aimed at minimizing total truck travel distance, where decision variables be...

Tight cooperative control of mobile entities and resources is essential to enhance the efficiency and effectiveness of terminal operation. The paper aims at developing an integrated simulation model which integrates the traffic flow control of internal tractors and the berth operation of a container terminal for evaluation of control policies adopted. Terminal operation is modeled as a discrete...