کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
481793 | 1446186 | 2007 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving multicut in directed trees by upgrading nodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
علوم کامپیوتر (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Improving multicut in directed trees by upgrading nodes Improving multicut in directed trees by upgrading nodes](/preview/png/481793.png)
چکیده انگلیسی
In this paper, we consider the network improvement problem for multicut by upgrading nodes in a directed tree T = (V, E) with multiple sources and multiple terminals. In a node based upgrading model, a node v can be upgraded at the expense of c(v) and such an upgrade reduces weights on all edges incident to v. The objective is to upgrade a minimum cost subset S â V of nodes such that the resulting network has a multicut in which no edge has weight larger than a given value D. We first obtain a minimum cardinality node multicut Vc for tree T, then find the minimum cost upgrading set based on the upgrading sets for the subtrees rooted at the nodes in Vc. We show that our algorithm is polynomial when the number of source-terminal pairs is upper bounded by a given value.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Operational Research - Volume 183, Issue 3, 16 December 2007, Pages 971-980
Journal: European Journal of Operational Research - Volume 183, Issue 3, 16 December 2007, Pages 971-980
نویسندگان
Xiucui Guan, Jianzhong Zhang,