随机条件下基于存贮论的海运空箱调运仿真研究

基于存贮理论的思想,提出在港口设置阈值(D,U),即当港口空箱数量小于D时,调运空箱到港口直至达到D值;当港口空箱数量大于U时,把港口多余空箱装船运走。并以一条航线空箱总成本为目标函数,分别建立设置与未设置(D,U)值的成本计算模型,比较两种策略下模型的差异,并通过仿真的方法,计算出航程的总成本并进行比较,得出设置(D,U)值的优势并对设置值进行灵敏度分析。运算结果表明,设置(D,U)值的策略能够明显降低航线成本。

Simulation of inventory theory based maritime empty containers scheduling in random condition

Based on the inventory theory,we propose to set a threshold value（D,U）in a port.Therefore,when the number of empty containers at the port is less than D,keep transporting the empty containers to the port until its amount grew to D,but transport the redundant empty containers away from the port when their number are greater than U.We establish two cost calculation models for threshold value（D,U） setted case and not setted case with the total cost of empty containers of a sea route as a target function.We further compare the differences between two models.We calculate the total cost of a voyage for the two models by simulation.We eventually obtain the advantage of threshold （D,U） setting and analyze its sensitivity.Calculation results show that the policy corresponding to threshold （D,U） setting can significantly reduce the total cost of a voyage.