3、单时间窗问题和多时间窗问题根据客户可接受送货的时间窗是一个还是多个

3. Single time window problem and multiple time window problem <br>According to whether the customer can accept one or more time windows for delivery, the vehicle routing problem with time window can be divided into single time window problem and multiple time window problem. Each of VRPMTW There may be multiple non-overlapping time windows for each customer, and the vehicle can choose any time window to complete the service. At present, there is very little research literature on the problem of multiple time windows. The problem of non-full load and multiple time windows with limited maximum travel time has been studied, a mathematical model has been established, and the ant colony system is used to solve the problem.

3, single time window problem and multi-time window problem<br>Depending on whether the customer can accept delivery time window is one or more, the vehicle path problem with time window can be divided into single time window problem and multi-time window problem, VRPMTW each customer may have multiple non-overlapping time window, the vehicle can choose a time window to complete the service. At present, there are very few research literatures on the problem of multi-time window, and the problem of non-full-load multi-time window with limited maximum travel time is studied, a mathematical model is established, and the problem is solved by using the ant colony system.

3. Single time window problem and multi time window problem<br>According to the time window that customers can accept delivery is one or more, vehicle routing problem with time window can be divided into single time window problem and multi time window problem. Each customer in vrpmtw may have multiple time windows that do not overlap each other, and vehicles can choose any time window to complete the service. At present, there are few literatures on multi time window problem. This paper studies the problem of non full load multi time window with limited maximum travel time, establishes a mathematical model, and uses ant colony system to solve the problem.