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176
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MP
2006
15 years 6 months ago
2006
Mixed integer programming (MIP) formulations are typically tightened through the use of a separation algorithm and the addition of violated cuts. Using extended formulations involv...
185
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MP
2006
15 years 6 months ago
2006
We study two different lot-sizing problems with time windows that have been proposed recently. For the case of production time windows, in which each client specific order must be ...
131
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NAR
2006
15 years 6 months ago
2006
The Arabs comprise a genetically heterogeneous group that resulted from the admixture of different populations throughout history. They share many common characteristics responsib...
196
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NETWORKS
2006
15 years 6 months ago
2006
We are given a directed network G = (V, A, u) with vertex set V , arc set A, a source vertex s V , a destination vertex t V , a finite capacity vector u = {uij}ijA, and a positi...
231
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NETWORKS
2006
15 years 6 months ago
2006
Mobile agents operating in networked environments face threats from other agents as well as from the hosts (i.e., network sites) they visit. A black hole is a harmful host that de...