Network Location Problem with Stochastic and Uniformly Distributed Demands
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-29-5_009
تاریخ نمایه سازی: 12 دی 1395
Abstract:
This paper investigates the network location problem for single-server facilities that are subjected to congestion. On each network edge, customers are uniformly distributed, and their requests for service are assumed to be generated according to a Poisson process. A number of facilities are to be selected from a number of candidate sites, and a single server is located at each facility with exponentially distributed service times. Using queueing analysis, we develop a mixed integer mathematical model to minimize the total travel and the average waiting times for customers. For evaluation of the validity of the proposed model, a numerical example is solved and analyzed using GAMS software. In addition, since the proposed problem is NP-hard, two metaheuristic algorithms including a genetic algorithm and a simulated annealing algorithm are developed and applied for large-size problems.
Keywords:
Network LocationCongested FacilitiesDistributed DemandQueueing ModelsMetaheuristic Algorithms