التفاصيل البيبلوغرافية
| العنوان: |
A flexible model and efficient solution strategies for discrete location problems |
| المؤلفون: |
Marín, Alfredo1 amarin@um.es, Nickel, Stefan2,3 s.nickel@orl.uni-saarland.de, Puerto, Justo4 puerto@us.es, Velten, Sebastian2 s.velten@orl.uni-saarland.de |
| المصدر: |
Discrete Applied Mathematics. Mar2009, Vol. 157 Issue 5, p1128-1145. 18p. |
| مصطلحات موضوعية: |
*LOCATION problems (Programming), *MATHEMATICAL models, *MEDIAN (Mathematics), *MATHEMATICAL inequalities, *MATHEMATICAL analysis, *ALGEBRAIC functions, *MATHEMATICAL variables |
| مستخلص: |
Abstract: Flexible discrete location problems are a generalization of most classical discrete locations problems like -median or -center problems. They can be modeled by using so-called ordered median functions. These functions multiply a weight to the cost of fulfilling the demand of a customer, which depends on the position of that cost relative to the costs of fulfilling the demand of other customers. In this paper a covering type of model for the discrete ordered median problem is presented. For the solution of this model two sets of valid inequalities, which reduces the number of binary variables tremendously, and several variable fixing strategies are identified. Based on these concepts a specialized branch & cut procedure is proposed and extensive computational results are reported. [Copyright &y& Elsevier] |
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