Locating emergency vehicles with an approximate queuing model and a meta-heuristic solution approach

In this paper, the location of emergency service (ES) vehicles is studied on fully connected networks. Queuing theory is utilized to obtain the performance metrics of the system. An approximate queuing model the (AQM) is proposed. For the AQM, different service rate formulations are constructed. These formulations are tested with a simulation study for different approximation levels. A mathematical model is proposed to minimize the mean response time of ES systems based on AQM. In the model, multiple vehicles are allowed at a single location. The objective function of the model has no closed form expression. A genetic algorithm is constructed to solve the model. With the help of the genetic algorithm, the effect of assigning multiple vehicles on the mean response time is reported.


Locating emergency vehicles with an approximate queueing model and a meta-heuristic solution ap- proach
Akdoğan, Muharrem Altan; Bayındır, Zeynep Pelin; İyigün, Cem (2016-07-05)
In this study, the problem of optimal location decision of Emergency Service (ES) vehicles such as ambulances, fire trucks and patrols as a server-to-customer service is discussed. Hypercube queueing model (HQM) are employed to achieve performance measures that are sig- nificant to the location decision of ES vehicles. As an extension of this model, Spatial Queueing Model (SQM) is introduced for spatial networks. This study proposes a generalization of SQM for complete networks. Districting of the demand re...
The performance and efficiency of envelope elimination and restoration transmitters for future multiple-input multiple-output wireless local area networks
Nesimoglu, T.; Parker, S. C. J.; Morris, K. A.; McGeehan, J. P. (Institution of Engineering and Technology (IET), 2008-03-01)
The inefficiency of contemporary power amplifiers ( PAs), when operating in their linear region, is a major obstacle to mobile operation of wireless local area networks ( WLANs) based on IEEE 802.11n. Therefore the use of more efficient envelope elimination and restoration ( EER) transmitter architectures is considered. In addition to high efficiency it is also necessary to satisfy the spectral mask and achieve satisfactory link- level performance. Link- level simulations of a contemporary WLAN PA show that...
An algorithm for the capacitated vehicle routing problem with time windows
Pehlivanoğlu, Osman; Meral, Fatma Sedef; Department of Industrial Engineering (2005)
In this thesis the capacitated vehicle routing problem with time windows (VRPTW) is studied, where the objective is to serve a set of geographically dispersed customers with known demands and predefined time windows at the minimum cost. It is hard to find an optimal solution for the VRPTW even if the problem size is small. Therefore, many heuristic methods are developed to obtain near optimal solutions. In this study a local search algorithm is proposed for solving the VRPTW, which consist of route construc...
Providing Automated Actions in Wireless Multimedia Sensor Networks via Active Rules
Oztarak, Hakan; Akkaya, Kemal; Yazıcı, Adnan (2011-09-28)
Manual processing of multimedia data in Wireless Multimedia Sensor Networks (WMSNs) may not always be possible. This necessitates autonomous operation of data processing at the sink for taking actions as well as communicating with the appropriate personnel whenever needed. In this paper, we propose a framework for fusing and automated processing of incomplete/imprecise WMSN data using active rules. First, data fusion is performed via fuzzy logic to handle the uncertainty in the received data at the sink. We...
Location analysis of emergency vehicles using an approximate queueing model
Akdoğan, Muharrem Altan; Bayındır, Zeynep Pelin; İyigün, Cem (Elsevier BV; 2016-09-07)
In this study, location analysis of emergency system vehicles is discussed using an approximate queueing model (AQM) on fully connected networks. We relax single vehicle restriction in each vehicle location which is commonly employed in the literature. Order of districting structure is used to transition rates in AQM. Service rates are computed regarding the location of the demand call and the vehicle, which provides higher resolution than inter-intra district service rates. Generic rate formulations are de...
Citation Formats
M. A. Akdoğan, Z. P. Bayındır, and C. İyigün, “Locating emergency vehicles with an approximate queuing model and a meta-heuristic solution approach,” TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES, pp. 134–155, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39492.