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This paper addresses the simultaneous quay crane and truck scheduling problem (QC&TSP) at a container terminal. This paper considers one quay crane and several trucks to unload containers from the vessel, and every truck needs some time to come back to the quay crane after transports one container to the yard, then it can transport another container continually. In this paper, every container...
If a transit vehicle breaks down on a schedule trip, there are some vehicles in the system need to serve this trip and the former schedule must be changed. For solving the urgency vehicle routing problem with disruption that may be vehicle breakdowns or traffic accidents in the logistics distribution system, through the analysis of the problem and the disruption measurement, the mathematics model...
Vehicle or bus scheduling problem (VSP), involving in a given set of time-tabled trips to be assigned to vehicles to minimize capital and operating costs, is one of the most critical issues faced by transit agencies. This paper addresses a multi-depot multi-vehicle-type VSP with route time constraints as well as capacity of depot restrictions, and presents a model with multiple objectives to minimize...
For solving the vehicle routing disruption problem which is caused by vehicles breakdown or traffic accidents in the logistic distribution system, an urgency vehicle scheduling scheme is established based on the theory of disruption management. According to the characteristics of the problem, Lagrangian relaxation approach is applied to simplify and divide the problem into two parts. The column generation...
This paper is aimed to research into military vehicle scheduling problem (VSP) by using ant colony algorithm. A vehicle scheduling model with time windows was built up based on the objective of minimum transportation distance, and the model characteristics and application prospects was analyzed. Based on local search strategies, traditional ant colony algorithm was improved. Then the algorithmic procedures...
Considering the specialties of logistics distribution under electronic commerce, the traditional multi-depot vehicle scheduling model is modified in order to reduce the distribution cost; objective function is modified based on minimum expense. At the same time, in order to improve the distribution service quality and market competition, add maximum work time, many vehicle types, and maximum running...
Combined with intelligent algorithms and dynamic multi-agent technology, this paper proposes an agile logistics distribution optimization model for scheduling vehicle routing problem (VRP) timely. This model uses frame structures to describe symbolic knowledge for model's target function and constraints, so that some issues involved in the logistics scheduling optimization can be done away with. The...
In order to satisfy with the individual and various demand of customer, establish vehicle scheduling with backhauls model. According to the characteristics of model, hybrid genetic heuristic algorithm is used to get the optimization solution. First of all, use natural number coding so as to simplify the problem; retain the best selection so as to guard the diversity of group. Improved ordinal crossover...
This paper considers a transporter scheduling problem under dynamic block transportation environment in shipbuilding. In dynamic situations, there exist the addition, cancellation or change of block transportation requirements, sudden breakdowns, and maintenance of transporters. Some blocks are available to be picked up at a specific time during the planning horizon while some other blocks need to...
In order to satisfy with the individual and various demand of customer, establish multi-type vehicles vehicle scheduling with picking-delivery model. According to the characteristics of model, hybrid genetic algorithm is used to get the optimization solution. First of all, use natural number coding so as to simplify the problem; use the individual amount control choice strategy so as to guarantee...
On-Demand Bus is a Demand Responsive Transit (DRT) service that passengers will be transported by the vehicles after they reserve a seat. The vehicle wonpsilat move if there is no reservation and the efficiency is expected as a new transportation service. It allows potential passengers to request service via the Internet or mobile phone, with requests for ride being processed by a server computer...
In this paper a logistics transportation problem including routing, scheduling and loading tasks is presented. Most of the related works only involve the solution of routing and scheduling, as a combination of up to six different types of VRPs (Rich VRP), leaving away the loading task, which are not enough to define more complex real-world cases. We propose a solution methodology for transportation...
The logistics vehicle scheduling problem is a widely existent problem in distribution. In fact, it is the vehicle routing problem with time window. In the vehicle routing problem with time windows (VRPTW), there are two main objectives. The primary objective is to reduce the number of vehicles, the secondary one is to minimize the total distance travelled by all vehicles. This is an NP-complete optimization...
This paper considers a transporter scheduling problem under dynamic block transportation environment in shipbuilding. In dynamic situations, there exist the addition or cancellation of block transportation requirements. The transportation of the blocks in the shipyard has some distinct characteristics. Some blocks are available to be picked up at a specific time during the planning horizon while some...
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