| In the actual liner operation process,in order to cope with the slump in container transportation caused by the stagnation of trade in certain periods,liner companies will formulate suspension plans for some voyages.When shipping demand rebounds,there will be poor container turnover at the port causing serious port congestion,and liner ships will not be able to berth as planned.Liner companies will also take suspension plans for such voyages.In addition to the cancellation of some liner voyages,it is also particularly common for liner navigation to be affected by disturbance events and it is difficult to guarantee the punctuality rate.It may happen that the liner cannot arrive and leave the port at the time specified in the sailing schedule,which affects the cargo owner.The transportation plan brings losses to the interests of the cargo owners.From the perspective of the liner company,under the background that the liner company adopts the suspension plan,the container cargo flow of the suspended route is restored,and the liner ship on the alternative route suggested by the liner company is used to transport these goods,so as to complete the transportation plan of the cargo owner.At the same time,the liner shipping schedule for the restoration of alternative routes is considered,and the comprehensive recovery of the liner shipping schedule and the container flow under the background of the suspension is studied.This paper firstly expounds the research background and research significance of the comprehensive recovery of liner shipping schedule and container flow.By analyzing the research results of domestic and foreign scholars on the problem of interference recovery,it points out the insufficiency of the research on interference recovery in the liner field.Integrated recovery issues with container flow.Then,the related theory of disturbance recovery is expounded,and the main points and methods of disturbance recovery in liner transportation are analyzed accordingly.The recovery of liner disturbance will increase the fuel consumption of ships,and the recovery of container flow will increase the process of transshipment,which will increase a lot of carbon emissions.Therefore,this paper also expounds the relevant theory of carbon emissions in liner transportation.Combining with theoretical elaboration,this paper aims to minimize the total cost of the liner company,sets the hard time window constraint of the cargo flow of the suspended route to construct the integrated recovery problem of the shipping schedule and the cargo flow,and considers the increased carbon emission cost during the recovery process of the container flow.A mixed-integer nonlinear programming model is established.The model is solved by the adaptive mutation particle swarm algorithm(AMPSO).The results show that after the comprehensive recovery of liner shipping schedule and container packing flow is adopted,the total cost of the shipping schedule recovery model without considering container flow recovery is reduced by 10.66%.The innovative results of this paper:(1)A comprehensive recovery model of liner shipping schedule and container flow is established.In previous studies,liner shipping schedule recovery and container flow recovery are two independent problems.The model established in this paper combines the two problems and ensures that the The interests of liner companies and cargo owners.Considering the carbon emission cost in the process of disturbance recovery,it conforms to the concept of low-carbon shipping and makes the problem more comprehensive.(2)The liner shipping schedule is compared with the container flow comprehensive recovery model and the liner shipping schedule recovery model,and the influence of various factors in the problem on the results is analyzed in depth,which provides decision-making references for liner companies and cargo owners in different situations. |
