In recent years, there have been several attempts to use machine learning techniques to improve the performance of exact and approximate optimization algorithms. Along this line of research, the present paper shows how supervised and unsupervised techniques can be used …
© 2019 Elsevier B.V.The time-dependent vehicle routing problem with time windows (TDVRPTW) is examined in this study. A mathematical model for the TDVRPTW is formulated by considering the time-dependent vehicle speeds, capacity, travel time, wait time, customer demand, service time, …
Given a graph whose arc traversal times vary over time, the Time-Dependent Travelling Salesman Problem amounts to find a Hamiltonian tour of least total duration. In this paper we exploit a new degree of freedom in the Cordeau et al. …
© 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.In delivering perishable goods, certain unexpected disruptive events may cause the initial routing scheme to be infeasible. A new routing scheme must be generated quickly to alleviate delivery disturbances. …
A time-dependent graph is, informally speaking, a graph structure dynamically changes with time. In such graphs, the weights associated with edges dynamically change over time, that is, the edges in such graphs are activated by sequences of time-dependent elements. Many …
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.In this study, we explore a time-dependent multi-trip vehicle routing problem (TDMTVRP) with an improved travel speed model. This problem is set in a scenario that (a) a set of customers …
© 2000-2011 IEEE.For the benefit of global environmental preservation, electric vehicles (EVs) have been gradually accepted by people in the past few years. However, the technical problem of limited drivable range and long charging duration is still a major hurdle …
© 2019 Association for Computing Machinery.As the remarkable improvement of people’s living levels and interesting for entertainment, the theme park has become one of the most popular places for people to enjoy life. However, since the high popularity of theme …
This paper presents a novel extension of vehicle routing problem considering alternative green-fuel powered vehicles in the presence of congestion, with the aim of minimizing CO2 emissions. The travel time and fuel consumption on each arc are not only dependent …