Over the past decades, the Vehicle Routing Problem (VRP) and its variants have grown ever
more popular in the academic literature. Yet, the problem characteristics and assumptions …

In the vehicle routing problem with simultaneous pickup and delivery (VRPSPD), goods
have to be transported from different origins to different destinations, and each customer has …

Unmanned aerial vehicles, or drones, have the potential to significantly reduce the cost and
time of making last-mile deliveries and responding to emergencies. Despite this potential …

Optimization of on-demand transportation systems and ride-sharing services involves
solving a class of complex vehicle routing problems with pickup and delivery with time …

This paper addresses the design of a parcel delivery system using drones, which includes
the strategic planning of the system and operational planning for a given region. The amount …

Fierce competition and the mandate for green development have driven cold chain logistics
companies to minimize total distribution costs and carbon emissions to gain a competitive …

In this paper, we consider the vehicle routing problem with load-dependent drones
(VRPLD), in which the energy consumption of drones is load-dependent and represented by …

In this paper, a sustainable closed-loop supply chain problem is modelled in conditions of
uncertainty. Due to the COVID-19 pandemic situation, the designed supply chain network …

Background: In this paper, a new closed-loop supply chain (CLSC) network model, including
economic, social and environmental goals, is designed. This paper's primary purpose is to …

This paper focuses on the problem of minimizing CO 2 emissions in the routing of vehicles in
urban areas. While many authors have realized the importance of speed in minimizing …