This paper considers a multi-depot heterogeneous vehicle routing problem (MDHVRP) with time windows, which is very crucial for hazardous materials transportation. For this reason, we formalize as multi-objective MDHVRP optimization model, where the actual load dependent risk of transportation considered. To solve problem, propose hybrid evolutionary algorithm (HMOEA) and two-stage (TSA). In add...

The design of a supply chain has been considered by many practitioners and researchers recently. One model that is used to optimize distribution from a single facility (depot) to a set of retailers over a given planning horizon and considering stock management decisions is known as Inventory Routing Problem (IRP). This model tries to optimize the trade-off between inventory and transportation c...

The Capacitated Vehicle Routing Problem (CVRP) is a combinatorial optimization and nonlinear problem seeking to service a number of customers with a fleet of vehicles. CVRP is an important problem in the fields of transportation, distribution and logistics. Usually, the goal is delivering goods located at a central depot to customers who have placed orders. This transportation optimization prob...

This article describes a tabu search heuristic for the dial-a-ride problem with the following characteristics. Users specify transportation requests between origins and destinations. They may provide a time window on their desired departure or arrival time. Transportation is supplied by a fleet of vehicles based at a common depot. The aim is to design a set of least cost vehicle routes capable ...

This paper introduces a special kind of multi-depot pickup and delivery problem. In contrast to the general pickup and delivery problem (GPDP, see e.g. [19, 31]) all requests have to be picked up at or delivered to one central location which has the function of a hub or consolidation point. In hub transportation networks routes between customers and the hub are often short, i.e. involve only on...

The rapid advancements in information technologies and globalization change the way of distributing goods to customers. Many enterprises have multiple factories, warehouses, distribution centers strive for competitive efficiency operations minimize transportation costs. This study proposed mixed-integer programming (MIP) model multi-depot split-delivery vehicle routing problems (MDSDVRPs) with ...

Because current remote monitor systems can’t deal with problems of real-time transmissions in the bad condition of network very well, this article presents a study which is combined with the evaluation of video streams, adjustment and sealing user-defined data pockets and discarding useless data pockets. The goal of this solution is to transmit video information of national grain depot. And its...