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Recent Submissions

Bi‑objective dynamic weapon‑target assignment problem with stability measure
Silav, Ahmet; Karasakal, Esra; Karasakal, Orhan (Springer, 2021-01-01)
In this paper, we develop a new bi-objective model for dynamic weapon-target assignment problem. We consider that the initial weapon assignment plan of defense is disrupted during engagement because of a destroyed air targ...
Exact and heuristic solution approaches for the airport gate assignment problem
Karsu, Özlem; Azizoğlu, Meral; Alanlı, Kerem (2021-01-01)
© 2021 Elsevier LtdIn this study, we consider an airport gate assignment problem that assigns a set of aircraft to a set of gates. The aircraft that cannot be assigned to any gate are directed to an apron. We aim to make a...
A multi-objective approach in expanding the pre-positioning warehouse networks in humanitarian logistics
Yakici, Ertan; Karatas, Mumtaz; Duran, Serhan (2021-01-01)
In this study, we focus on the structure of the pre-positioning warehouse networks which have a great effect on the response to a disaster. We determine the pre-positioning warehouse network configuration of CARE Internati...
An evaluation of a novel approach for clustering genes with dissimilar replicates
Cinar, Ozan; İyigün, Cem; İlk Dağ, Özlem (Informa UK Limited, 2020-12-01)
Clustering the genes is a step in microarray studies which demands several considerations. First, the expression levels can be collected as time-series which should be accounted for appropriately. Furthermore, genes may be...
Entegre lojistik sistemler için yeni bir onarım ağı yapısı önerisi
Bıçakçı, İsmail; İç, Yusuf Tansel; Karasakal, Esra; Dengiz, Berna (2020-12-01)
Askeri silah sistemleri gibi ilk yatırım maliyeti yüksek olan sistemlerdeonarım seviyesi analizi son yıllarda kritik ve karmaşık bir karar vermeproblemi olarak karşımıza çıkmaktadır. Onarım seviyesi analizinde, onarımfaali...
Multiobjective aerial surveillance over disjoint rectangles
Karasakal, Orhan; Karasakal, Esra; Maraş, Güliz (Elsevier BV, 2020-10-01)
In Aerial Surveillance Problem (ASP), an air platform with surveillance sensors searches a number of rectangular areas by covering the rectangles in strips and turns back to base where it starts. In this paper, we present ...
A healthcare facility location problem for a multi -disease, multi -service environment under risk aversion
Taymaz, S.; Iyigun, C.; Bayındır, Zeynep Pelin; Dellaert, N. P. (Elsevier BV, 2020-09-01)
This paper presents a stochastic optimisation model for locating walk-in clinics for mobile populations in a network. The walk-in clinics ensure a continuum of care for the mobile population across the network by offering ...
Multiparty game research and example analysis in supply chain finance system based on MPDE theory
Liu, Xun; Peng, Xia; Stuart, Martin (Elsevier BV, 2020-8)
Under the supply chain financial model, financial institutions (such as commercial banks) no longer supply directly to financing companies, but instead face the entire supply chain. Now this model has become a new area to ...
Centroid based Tree-Structured Data Clustering Using Vertex/Edge Overlap and Graph Edit Distance
DİNLER, DERYA; Tural, Mustafa Kemal; Özdemirel, Nur Evin (Springer Science and Business Media LLC, 2020-06-01)
We consider a clustering problem in which the data objects are rooted m-ary trees with known node correspondence. We assume that the nodes of the trees are unweighted, but the edges can be unweighted or weighted. We measur...
Representing preferences by choquet integral: Guidelines to specify the capacity type
Dolgun, Leman Esra; Burnak, Nimetullah; Köksal, Gülser (Growing Science, 2020-06-01)
© 2020 by the authors; licensee Growing Science, Canada.This study considers representing decision maker preferences by Choquet integral in existence of interactions among criteria. Parameters of the Choquet integral are c...
Finding optimal schedules in a home energy management system
Merdanoglu, Hakan; Yakici, Ertan; Dogan, O. Tufan; Duran, Serhan; Karatas, Mumtaz (Elsevier BV, 2020-05-01)
In this study, we model and solve the scheduling problem embedded in a home energy management system (HEMS), which enables users to overcome the major obstacles in implementing demand response programs. The problem aims to...
Extracting the Boundaries of Clusters: A Post-Clustering Tool for Spatial Datasets
İNKAYA, TÜLİN; Kayaligil, Sinan; Özdemirel, Nur Evin (World Scientific Pub Co Pte Lt, 2020-04-01)
Boundary extraction is a fundamental post-clustering problem. It facilitates interpretability and usability of clustering results. Also, it provides visualization and dataset reduction. However, it has not attracted much a...
Closing the loop in supply chains: Economic and environmental effects
Alegoz, Mehmet; Kaya, Onur; Bayındır, Zeynep Pelin (2020-04-01)
Over the past years, companies started to close the loop in their supply chains to comply with the regulations and increase the sustainability of their systems. In this study, we focus on the economic and environmental eff...
A Branch and Bound Algorithm for a Multi-Mode Project Scheduling Problem With a Single Non-Renewable Resource
Altıntaş, Cansu; Azizoğlu, Meral (2020-04-01)
In this paper, a project scheduling problem with multi-modes and a single non-renewable resource is considered. The resource is released in pre-specified times at pre-specified quantities. An activity can be executed at di...
k-step betweenness centrality
Akgun, Melda Kevser; Tural, Mustafa Kemal (Springer Science and Business Media LLC, 2020-03-01)
The notions of betweenness centrality (BC) and group betweenness centrality (GBC) are widely used in social network analyses. We introduce variants of them; namely, the k-step BC and k-step GBC. The k-step GBC of a group o...
Solution methods for a min-max facility location problem with regional customers considering closest Euclidean distances
DOLU HASTÜRK, NAZLI; HASTÜRK, UMUR; Tural, Mustafa Kemal (Springer Science and Business Media LLC, 2020-03-01)
We study a facility location problem where a single facility serves multiple customers each represented by a (possibly non-convex) region in the plane. The aim of the problem is to locate a single facility in the plane so ...
Belirsizlik Altında Hemşire Çizelgeleme Problemi
Batun, Sakine (2020-03-01)
A flexible reference point-based multi-objective evolutionary algorithm: An application to the UAV route planning problem
DAŞDEMİR, ERDİ; Köksalan, Mustafa Murat; TEZCANER ÖZTÜRK, DİCLEHAN (Elsevier BV, 2020-02-01)
We study the multi-objective route planning problem of an unmanned air vehicle (UAV) moving in a continuous terrain. In this problem, the UAV starts from a base, visits all targets and returns to the base in a continuous t...
Generalized desirability functions: a structural and topological analysis of desirability functions
Akteke-Öztürk, Başak; Weber, Gerhard-Wilhelm; Köksal, Gülser (Informa UK Limited, 2020-01-02)
<p>We have Derringer and Suich’s desirability functions in mind, especially, the two-sided ones in our analysis throughout this study. We propose and develop a finite partitioning procedure of the individual desirabilit...
Rebalancing the assembly lines with total squared workload and total replacement distance objectives
Girit, Utku; Azizoğlu, Meral (Informa UK Limited, 2020-01-01)
Assembly line balancing is an important and well recognised operations research problem. The current line balance may not stay optimal, even feasible, due to the disruptions in one or more workstations. In this study, afte...
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