Nader Ghaffarınasab

E-mail

naderg@metu.edu.tr

Department

Department of Industrial Engineering

A Heuristic Approach For Solving The Team Orienteering Problem With Stochastic Time-Dependent Travel Times Ghaffarınasab, Nader (2025-06-27) The team orienteering problem (TOP) aims at optimally planning a set of routes subject to distance or duration constraints in such a way that the total collected rewards from a given set of customers is maximized. The prob...
A heuristic approach to the stochastic capacitated single allocation hub location problem with Bernoulli demands Andaryan, Abdullah Zareh; Mousighichi, Kasra; Ghaffarınasab, Nader (2024-02-01) Hubs are critical components of transportation and distribution systems, and hub networks play a special role in freight and passenger transportation services worldwide. This paper studies a capacitated single allocation h...
A mean-CVaR approach to the risk-averse single allocation hub location problem with flow-dependent economies of scale Ghaffarınasab, Nader; Cavus, Ozlem; Kara, Bahar Y. (2023-01-01) The hub location problem (HLP) is a fundamental facility planning problem with various applications in transportation, logistics, and telecommunication systems. Due to strategic nature of the HLP, considering uncertainty a...
Exact algorithms for the robust uncapacitated multiple allocation <i>p</i>-hub median problem Ghaffarınasab, Nader (2022-07-01) This paper addresses the robust uncapacitated multiple allocation p-hub median problem where the demand traffic between origin-destination pairs are subject to uncertainty. The employed robust optimization approach adjusts...
An efficient matheuristic for the robust multiple allocation <i>p</i>-hub median problem under polyhedral demand uncertainty Ghaffarınasab, Nader (2018-09-01) This paper addresses the robust multiple allocation p-hub median problem under polyhedral demand uncertainty. Three variants of polyhedral uncertainty models are used in the problem, namely the hose, the hybrid, and the bu...

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