Search Results - "Bektas, Tolga"

The multiple traveling salesman problem: an overview of formulations and solution procedures by Bektas, Tolga

“…The multiple traveling salesman problem (mTSP) is a generalization of the well-known traveling salesman problem (TSP), where more than one salesman is allowed…”
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The Scope for Pavement Porters: Addressing the Challenges of Last-Mile Parcel Delivery in London by Allen, Julian, Bektas, Tolga, Cherrett, Tom, Bates, Oliver, Friday, Adrian, McLeod, Fraser, Piecyk, Maja, Piotrowska, Marzena, Nguyen, ThuBa, Wise, Sarah

“…The UK parcel sector generated almost £9 billion in revenue in 2015, with growth expected to increase by 15.6% to 2019 and is characterized by many independent…”
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The Pollution-Routing Problem by Bektaş, Tolga, Laporte, Gilbert

“…► Minimizing emissions does not imply minimizing operational costs in vehicle routing. ► CO 2 emission cost estimates do not seem to be as important as fuel or…”
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A review of recent research on green road freight transportation by Demir, Emrah, Bektaş, Tolga, Laporte, Gilbert

“…•An extensive analysis of factors affecting fuel consumption is provided.•Freight transportation vehicle emission models are reviewed.•Routing problems with…”
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An adaptive large neighborhood search heuristic for the Pollution-Routing Problem by Demir, Emrah, Bektaş, Tolga, Laporte, Gilbert

“…► A heuristic algorithm is described for the Pollution-Routing Problem (PRP). ► A speed optimization algorithm is offered to minimize fuel and driver costs. ►…”
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The bi-objective Pollution-Routing Problem by Demir, Emrah, Bektaş, Tolga, Laporte, Gilbert

“…•A bi-objective variant of the Pollution-Routing Problem (PRP) is introduced.•Several multi-objective optimization techniques are developed and tested for the…”
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Thirty years of heterogeneous vehicle routing by Koç, Çağrı, Bektaş, Tolga, Jabali, Ola, Laporte, Gilbert

“…•The paper classifies heterogeneous vehicle routing problems (HVRPs).•A comprehensive and up-to-date review of the existing work on HVRPs is presented.•A…”
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Route and speed optimization for autonomous trucks by Nasri, Moncef Ilies, Bektaş, Tolga, Laporte, Gilbert

“…•We study route and speed planning for autonomous trucks.•The traffic speed is assumed to be a random variable.•We aim to minimize the expected cost of fuel,…”
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Combinatorial Benders cuts for assembly line balancing problems with setups by Akpinar, Sener, Elmi, Atabak, Bektaş, Tolga

“…•We proposed an exact solution algorithm for setup assembly line balancing problem.•The algorithm is based on Benders decomposition.•We improved and used a…”
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The role of operational research in green freight transportation by Bektaş, Tolga, Ehmke, Jan Fabian, Psaraftis, Harilaos N., Puchinger, Jakob

“…•We review the contributions made in the area of green freight transportation.•The main focus is on two modes of transport, road and maritime.•Urban freight…”
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The time-dependent pollution-routing problem by Franceschetti, Anna, Honhon, Dorothée, Van Woensel, Tom, Bektaş, Tolga, Laporte, Gilbert

“…•We use a modeling approach for reducing greenhouse gas emissions in a presence of traffic congestion.•We show that idle waiting can be used as effective…”
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Using ℓ -norms for fairness in combinatorial optimisation by Bektaş, Tolga, Letchford, Adam N.

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Minimizing energy and cost in range-limited drone deliveries with speed optimization by Dukkanci, Okan, Kara, Bahar Y., Bektaş, Tolga

“…•A new energy minimizing drone delivery problem with range constraint is introduced.•Explicit calculations of drone energy consumption and the drone range are…”
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Modeling and optimizing the integrated problem of closed-loop supply chain network design and disassembly line balancing by Özceylan, Eren, Paksoy, Turan, Bektaş, Tolga

“…•CLSC network optimization and DLB problems are integrated.•A nonlinear integer programming formulation is presented.•Numerical examples are presented showing…”
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Requiem for the Miller–Tucker–Zemlin subtour elimination constraints? by Bektaş, Tolga, Gouveia, Luis

“…•Miller–Tucker–Zemlin (MTZ) and Desrochers–Laporte (DL) SECs are studied.•A systematic way of deriving MTZ and DL SECs is presented.•The approach is based on…”
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The green location-routing problem by Dukkanci, Okan, Kara, Bahar Y., Bektaş, Tolga

“…•We introduce the Green Location Routing Problem (GLRP).•A comprehensive modal emission model is used to estimate emissions.•A mathematical formulation with a…”
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Optimised solutions to the last-mile delivery problem in London using a combination of walking and driving by Martinez-Sykora, Antonio, McLeod, Fraser, Lamas-Fernandez, Carlos, Bektaş, Tolga, Cherrett, Tom, Allen, Julian

“…Inspired by actual parcel delivery operations in London, this paper describes a two-echelon distribution system that combines the use of driving and walking as…”
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Optimising vehicle and on-foot porter routing in urban logistics by Wehbi, Lais, Bektaş, Tolga, Iris, Çağatay

“…As modern cities expand, parcel carriers are obliged to deal with the various last-mile challenges of the urban setting, in order to meet the ever-increasing…”
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A hybrid evolutionary algorithm for heterogeneous fleet vehicle routing problems with time windows by Koç, Çağrı, Bektaş, Tolga, Jabali, Ola, Laporte, Gilbert

“…This paper presents a hybrid evolutionary algorithm (HEA) to solve heterogeneous fleet vehicle routing problems with time windows. There are two main types of…”
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A comparative analysis of several vehicle emission models for road freight transportation by Demir, Emrah, Bektaş, Tolga, Laporte, Gilbert

“…► We review and compare six vehicle emission models. ► We simulate different scenarios to test factors affecting fuel consumption. ► Predictions of the models…”
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