共查询到18条相似文献,搜索用时 390 毫秒
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《江苏科技大学学报(社会科学版)》2018,(5)
泊位和岸桥资源是集装箱码头至关重要的战略资源,如何合理有效进行资源配置尤为关键.文中将一艘船舶靠泊作业过程中需要占用的泊位资源、岸桥资源以及时间资源三者构成一个船舶资源占用块,通过这样的抽象变化,港口码头资源调度分配问题就转化为三维矩形布局问题.与此同时,考虑到偏好位置偏离、岸桥并行作业干扰以及船舶延时到、离港这3大因素的影响,建立以船舶在港资源占用总成本最小化为目标的泊位-岸桥-时间分配非线性规划模型,利用Matlab优化技术处理非线性多目标问题.计算表明,依据该数学模型进行泊位分配与岸桥调度更符合码头实际运营情况,从而高效实现资源合理配置,提高港区管理水平与经济效益. 相似文献
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根据到港船舶的装卸作业量、最优靠泊位置,为了最小化船舶在港时间、提高客户满意度,对延迟完工的装卸任务量、与最佳靠泊位置的偏离程度设置不同级别的惩罚费用系数;同时为了充分利用岸桥资源,考虑岸桥可在船舶间移动装卸的动态调度,研究连续型泊位下泊位分配-岸桥动态调度的联合优化问题.建立了以最小化延迟完工任务量、偏离最佳靠泊位置和岸桥移动的惩罚费用为目标的整数规划模型,结果可得到船舶靠泊计划,以及具体的岸桥分派计划.通过算例验证了联合调度优化模型对提高集装箱码头作业效率和船公司客户满意度的有效性. 相似文献
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连续泊位调度与岸桥配置协同优化 总被引:1,自引:0,他引:1
连续泊位调度与岸桥配置协同优化是集装箱码头提升竞争力的关键因素.针对该问题构建一个混合整数规划模型,以构造算法为核心,通过调整船舶的分配次序,设计了一个新的启发式算法.通过VB6.0软件编程,进行了四组大规模仿真算例实验,结果显示60%的算例在新算法下可获得更优的解,平均改进7.37%,证明了模型和算法的有效性. 相似文献
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S. R. Seyedalizadeh Ganji A. Babazadeh N. Arabshahi 《Journal of Marine Science and Technology》2010,15(4):408-416
The optimal usage of berths plays a key role in raising the efficiency of container terminals. The berth allocation problem
in a container terminal is defined as the feasible allocation of berths to incoming ships such that the total time that elapses
between the arrival of the ships to their exit from their berths is minimized. In the transportation literature, the latter
problem is usually formulated as a mixed integer programming model. Optimization methods, like the branch and bound algorithm,
are efficient ways to solve this model but become absolutely unusable when the size of the problem increases. An advanced
search method such as GA may be suited to such a situation. In this paper, a genetic-based algorithm is proposed for the problem.
Computational results for two test problems (a small and a large-sized problem) are also presented. The results from the small
test are also compared with the results obtained from the branch and bound algorithm. 相似文献
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以集装箱码头船舶装卸作业调度问题为研究对象,综合考虑港口多种装卸资源和流程,在船舶泊位占有时间确定的条件下,以装卸运输作业总成本最低为目标,提出单船装卸作业调度模型;用蚁群算法对所建立的模型进行求解和仿真,并结合实际问题给出具体调度结果。此模型和方法考虑了生产效率和作业成本之间的平衡,保证以较低的成本完成规定作业。 相似文献
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The main challenge for container ports is the planning required for berthing container ships while docked in port.Growth of containerization is creating problems for ports and container terminals as they reach their capacity limits of various resources which increasingly leads to traffic and port congestion.Good planning and management of container terminal operations reduces waiting time for liner ships.Reducing the waiting time improves the terminal’s productivity and decreases the port difficulties.Two important keys to reducing waiting time with berth allocation are determining suitable access channel depths and increasing the number of berths which in this paper are studied and analyzed as practical solutions.Simulation based analysis is the only way to understand how various resources interact with each other and how they are affected in the berthing time of ships.We used the Enterprise Dynamics software to produce simulation models due to the complexity and nature of the problems.We further present case study for berth allocation simulation of the biggest container terminal in Iran and the optimum access channel depth and the number of berths are obtained from simulation results.The results show a significant reduction in the waiting time for container ships and can be useful for major functions in operations and development of container ship terminals. 相似文献