Blar i Bergen Open Research Archive på forfatter "Hemmati, Ahmad"
-
An adaptive heuristic for Feeder Network Design with optional transshipment
Bergmann, Morten; Msakni, Mohamed Kais; Hemmati, Ahmad; Fagerholt, Kjetil (Journal article; Peer reviewed, 2023)This paper studies the Feeder Network Design Problem (FNDP), which considers the design of a minimum cost liner shipping network for the transportation of cargo (containers) between a given hub port and a set of feeder ... -
Covering tour problem with varying coverage: Application to marine environmental monitoring
Torabi, Parisa; Oleynik, Anna; Hemmati, Ahmad; Alendal, Guttorm (Journal article; Peer reviewed, 2023)In this paper, we present a novel variant of the Covering Tour Problem (CTP), called the Covering Tour Problem with Varying Coverage (CTP-VC). We consider a simple graph 𝐺 = (𝑉 ,𝐸), with a measure of importance assigned ... -
A general deep reinforcement learning hyperheuristic framework for solving combinatorial optimization problems
Kallestad, Jakob Vigerust; Hasibi, Ramin; Hemmati, Ahmad; Sörensen, Kenneth (Journal article; Peer reviewed, 2023)Many problem-specific heuristic frameworks have been developed to solve combinatorial optimization problems, but these frameworks do not generalize well to other problem domains. Metaheuristic frameworks aim to be more ... -
Solving a pickup and delivery routing problem for fourth-party logistics providers
Johannessen, Preben Bucher; Hemmati, Ahmad; Moshref-Javadi, Mohammad (Journal article; Peer reviewed, 2022)This paper studies a pickup and delivery routing problem for fourth-party logistics providers. The problem aims to schedule routes of vehicles to pick up orders from suppliers and deliver them to factory locations considering ...