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dc.contributor.advisorKara, Bahar Y.en_US
dc.contributor.authorDükkancı, Okanen_US
dc.date.accessioned2016-01-08T18:26:39Z
dc.date.available2016-01-08T18:26:39Z
dc.date.issued2013
dc.identifier.urihttp://hdl.handle.net/11693/15913
dc.descriptionAnkara : The Department of Industrial Engineering and the Graduate School of Engineering and Science of Bilkent University, 2013.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2013.en_US
dc.descriptionIncludes bibliographical references leaves 106-111.en_US
dc.description.abstractHubs are facilities that consolidate and disseminate flow in many-to-many distribution systems. The hub location problem considers decisions including the locations of hubs on a network and also the allocations of the demand (non-hub) nodes to these hubs. In this study, a hierarchical multimodal hub network is proposed. Based on this network, a hub covering problem with a service time bound is defined. The hierarchical network consists of three layers. In this study, two different structures, which are ring(s)-star-star (R-S-S) and ring(s)-ring(s)-star (R-R-S), are considered. The multimodal network has three different types of vehicles at each layer, which are airplanes, big trucks and pickup trucks. For the proposed problems (R-S-S and R-R-S), two mathematical models are presented and strengthened with some valid inequalities. The computational analysis is conducted over Turkish and CAB data sets. Finally, we propose a heuristic algorithm in order to solve large-sized problems and also test the performance of this heuristic approach on Turkish network data set.en_US
dc.description.statementofresponsibilityDükkancı, Okanen_US
dc.format.extentxii, 136 leaves, tables, graphsen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjecthub locationen_US
dc.subjecthierarchical network designen_US
dc.subjectmultimode transportationen_US
dc.subject.lccQA402.6 .D84 2013en_US
dc.subject.lcshLocation problems (Programming)en_US
dc.subject.lcshTransportation problems (Programming)en_US
dc.subject.lcshTransportation--Mathematical models.en_US
dc.subject.lcshIndustrial location--Mathematical models.en_US
dc.subject.lcshRouters (Computer networks)en_US
dc.subject.lcshScheduling.en_US
dc.titleRouting and scheduling decisions in the hierarchical hub location problemen_US
dc.typeThesisen_US
dc.departmentDepartment of Industrial Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


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