Helpful. Every vehicle is equipped with a UAV. The first is the benefit on total COTherefore, the environmental goals of minimizing total COThe alternative way is examining its impact on the traditional objective of minimizing total cost, TC, under circumstances 1 and 2, including the fixed cost of the pair of a UAV and a vehicle and the variable route cost of the vehicle and the UAV:Therefore, the traditional goals of minimizing total cost under circumstances 1 and 2 are, respectively, as follows:The application of our genetic algorithm in our routing problem with UAV is described below.In the design of our genetic algorithm, we adapt the following service strategy. So, the UAV departs from customer 13 to serve 7 and fly to 6, while the UAV sequentially serves customers 3, 9, 19, and 6 and retrieves the UAV at 6. We propose a mixed-integer (0-1 linear) green routing model with these two kinds of traffic restrictions for UAVs to exploit the environmental aspects of the use of UAVs in logistics. 0000002973 00000 n As a result, energy consumption and COWith the development of unmanned aerial vehicles (UAVs), they become one of the best choices improving the “last-mile” delivery of products to consumers, both economically and environmentally, due to their significant performances in saving costs and energy. Besides, during the maintenance of some roads, only one lane is available, and vehicles traveling in opposite directions have to take turns on the road with a much lower speed. 0000085371 00000 n
Meanwhile, the vehicle goes to serve customer 1 and retrieve the UAV there.
0000004469 00000 n When a vehicle is under no traffic restriction, the COFirstly, traffic restrictions raise the cost and emission, and first kind of traffic restriction raises them further higher. 0000127563 00000 n
This is half-side traffic, which is other most popular traffic restriction. Specifically, we equally divide the service area into subareas of an even number. In reality, there are two kinds of most popular traffic restrictions, vehicle-type restriction, and half-side traffic. 0000082876 00000 n
As only 1 pair of a UAV and a vehicle is needed, they serve the whole delivery area. As a matter of course, if the vehicle arrives at the customer location, where the UAV is retrieved, it waits for the UAV, and vice versa. 0000002532 00000 n As both delivery range (distance and flight time) and capacity (weight and size) of the UAV are limited, it only delivers parts of the parcels, but the vehicle can deliver all the parcels.
As a result, the UAVs fly from 6 to 12 and to 8, while the vehicle runs from 6 to 16 and to 8 and picks up the UAV here. [We would like to point out that, with the development of UAV technology, UAV delivery is more and more popularly accepted as the best resolution of “last-mile” delivery problem. Any author submitting a COVID-19 paper should notify us at An example of partitioning service area and sequencing customers.Routings under different circumstances: (a) routing of only vehicle under no traffic restriction; (b) routing of only vehicle under the first kind of traffic restriction; (c) routing of only vehicle under the second kind of traffic restriction; (d) routing of vehicle with UAV under two kinds of traffic restrictions.Location of the 200 customers and the weight of their demand.Comparison of the costs of using UAV and not using UAV.School of Economics and Management, Chongqing Normal University, Chongqing 400047, ChinaCollege of Computer and Information Science, Chongqing Normal University, Chongqing 400047, ChinaSchool of Economics and Business Administration, Chongqing University, Chongqing 400044, ChinaThere was no significant change in the fitness value after continuous iteration; in other words, the change is less than 1‰ of the fitness valueThe population no longer evolves and the number of iterations reaches the set valueDetermine the coding mechanism, generate the initial population, and set the probability of cross variation and the maximum number of iterations.Evaluate the fitness of the current population and find the chromosome with the minimum objective function value and corresponding function value.Determine whether the termination conditions are met. %PDF-1.4 %���� Besides, UAVs can overcome traffic restrictions, which are the big obstacle in parcel delivery. 0000125725 00000 n Finally, we make an experimental analysis to illustrate and validate our model and algorithm, as well as better understand the environmental benefits of delivering with UAVs.The rest of this paper is organized as follows: we review the literature on “green routing” and routing problem with UAVs in Section Since the emergence of “truck dispatching problem,” vehicle routing problem (VRP) has been a hot research field [A series of studies show that, for the logistics, transportation accounts for about 90% of the energy consumption of the whole logistics. 0000082905 00000 n
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uav operating costs