Browsing by Author "Eliiyi U."

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Citation - Scopus: 2
A Fuzzy Perspective for Two-Dimensional Packing of Variable-Sized Items
(Vilnius Gediminas Technical University, 2010) Eliiyi U.; Nasibov E.
In this study, a two-dimensional packing problem encountered in the telecommunications area is investigated, which deals with the allocation of data transmission from a base station to many mobile stations for certain frames of time with varying objectives. The packed items have rectangular areas with variable width and height. Our objective is to maximize the overall quality of packing through a sequence of time frames. We use fuzzy area definitions to allow partial packing among frames, considering item priorities and service quality. We model the problem and discuss solution approaches. © Izmir University of Economics, Turkey, 2010.
Citation - WoS: 4
Citation - Scopus: 7
Origin-Destination Matrix Generation Using Smart Card Data: Case Study for Izmir
(2012) Nasiboglu E.; Kuvvetli U.; Ozkilcik M.; Eliiyi U.
In parallel with growing populations and the development of the cities, the traffic densities and respectively the need for public transportation increase. While the local authorities transport the passengers to most of the locations they want, they must also maintain a high-quality public transport system to keep passengers' satisfaction levels high. The most reliable way to conduct such a good transport planning study is to benefit from actual numerical data. The number of the studies related to public transport planning by using smart card data has increased along with the developing technology and widespread usage of electronic fare collection systems. In Izmir city, which has employed an electronic fare collection system since 1999, a fully integrated public transport system has been developed that includes bus, light rail system, metro and ferry modes. In this study, the stages of constructing an origin-destination (OD) matrix that shows the regions where passengers board and alight are evaluated, and an example OD matrix generated by using actual data is interpreted. © 2012 IEEE.