Overland vehicle routing problem(VRP) model is extended,in which minimum total navigation cost of all scheduled ships is taken as objective function,some practical factors such as time restriction are considered,a feeder line container ships scheduling model is constructed for hub-spoke maritime transportation system including hub port, feeder ports,multi-routes and multi-ship types.
针对轴辐射海上运输模式,扩展了陆上车辆运输调度(VRP)理论,以所有船舶总的航行成本最低为目标函数,考虑了软时间约束等现实因素,构建了包含枢纽港和喂给港、多航线、多船型的支线集装箱船舶调度模型。
In this paper, mechanism of collecting coaxial information in laser welding is introduced, the setups of light path for collecting coaxial emission light is analyzed.
对Q2 35钢激光深熔焊接过程中 ,从焊接熔池和等离子体中辐射的同轴光谱曲线是以连续谱为背景谱 ,当焊接参数的变化时 ,同轴辐射光的相对光强发生变化 ,而其与波长的对应关系没有变化。