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The hub covering problem over incomplete hub networks

Authors: Kalaycılar, Murat;

The hub covering problem over incomplete hub networks

Abstract

ÖZETEKS KL ANA DAĞITIM ÜSSÜ AĞLARINDAKAPLAMA PROBLEMMurat KalaycılarEndüstri Mühendisliği Yüksek LisansTez Yöneticisi: Yrd. Doç. Bahar Y. KaraNisan 2006Taşımacılık ve telekomünikasyon sistemlerindeki yükselen trend, son yıllardaki AnaDağıtım Üssü (ADÜ) yerleştirme çalışmalarının önemini artırmaktadır. ADÜ'ler akışlarıntoplandığı ve yayıldığı çoklu dağıtım sistemlerindeki özel tipteki merkezlerdir. Literatürde,p-ADÜ ortanca, p-ADÜ merkez ve ADÜ kaplama problemleri çalışılmıştır. Bu tezde, ADÜkaplama problemlerinin özel bir durumu olan, ?Eksikli ADÜ Ağlarında ADÜ KaplamaProblem?i olarak adlandırdığımız, problem üzerine odaklandık. Literatürdeki ADÜyerleştirme çalışmalarının çoğunda, tüm ADÜ'lerin birbirlerine tam bağlı olduklarıvarsayılmaktadır. Bizim gözlemlerimize göre, özellikle kargo dağıtım sistemlerinde, tümADÜ'ler arasında bağlantılar bulunmamaktadır. Bunun üzerine, bu temel varsayımıkaldırdık ve problemimizin, tekli ve çoklu atama durumları için tamsayılı programlamamodelleri önerdik. Bir de, problemimizin tekli ve çoklu atama durumları için üçer sezgiselçözüm yöntemi önerdik. Önerilen modellerin ve sezgisellerin çözüm performanslarında,CAB verisi kullanılmıştır. Sezgisellerin sonuçları ve karşılaştırmaları da tartışılacaktır.Anahtar Kelimeler: ADÜ Yerleştirme, Kaplama, Karışık Tamsayı Programlama,Sezgiseller

ABSTRACTTHE HUB COVERING PROBLEM OVERINCOMPLETE HUB NETWORKSMurat KalaycılarM.S. in Industrial EngineeringSupervisor: Assist. Prof. Bahar Y. KaraApril 2006The rising trend in the transportation and telecommunication systems increases theimportance of hub location studies in recent years. Hubs are special types of facilities inmany-to-many distribution systems where flows are consolidated and disseminated.Analogous to location models, p-hub median, p-hub center and hub covering problemshave been studied in the literature. In this thesis, we focus on a special type of hubcovering problem which we call as ?Hub Covering Problem over Incomplete HubNetworks?. Most of the studies in the hub location literature assume that the hub nodesare fully interconnected. We observe that, especially in cargo delivery systems, hubnetwork is not complete. Thus, in this study we relax this fundamental assumption andpropose integer programming models for single and multi allocation cases of the hubcovering problem. We also propose three heuristics for both single and multi allocationcases of the problem. During the computational performance of proposed models andheuristics, CAB data was used. Results and comparisons of these heuristics will also bediscussed.Keywords: Hub Location, Covering, Mixed Integer Programming, Heuristic

98

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Turkey
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Keywords

Covering, QA402.6 .K35 2006, Mixed Integer Programming, 000, Endüstri ve Endüstri Mühendisliği, Heuristic, Hub Location, Location problems (Programming), Industrial and Industrial Engineering

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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