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COR
2007
80views more  COR 2007»
13 years 5 months ago
A MAX-MIN ant system for unconstrained multi-level lot-sizing problems
In this paper we present an ant-based algorithm for solving unconstrained multi-level lot-sizing problems called ant system for multi-level lot-sizing algorithm (ASMLLS). We apply...
Rapeepan Pitakaso, Christian Almeder, Karl F. Doer...
COR
2007
103views more  COR 2007»
13 years 5 months ago
A reactive GRASP and path relinking for a combined production-distribution problem
An NP-hard production–distribution problem for one product over a multi-period horizon is investigated. The aim is to minimize total cost taking production setups, inventory lev...
Mourad Boudia, Mohamed Aly Ould Louly, Christian P...
COR
2007
108views more  COR 2007»
13 years 5 months ago
A hub location problem with fully interconnected backbone and access networks
This paper considers the design of two-layered fully interconnected networks.A two-layered network consists of clusters of nodes, each defining an access network and a backbone n...
Tommy Thomadsen, Jesper Larsen
COR
2007
80views more  COR 2007»
13 years 5 months ago
Scheduling with tool changes to minimize total completion time under controllable machining conditions
Scheduling under controllable machining conditions has been studied for some time. Scheduling with tool changes, particularly due to tool wear, has just begun to receive attention...
M. Selim Akturk, Jay B. Ghosh, Rabia K. Kayan
COR
2007
108views more  COR 2007»
13 years 5 months ago
New primal-dual algorithms for Steiner tree problems
We present new primal-dual algorithms for several network design problems. The problems considered are the generalized Steiner tree problem (GST), the directed Steiner tree proble...
Vardges Melkonian
COR
2007
97views more  COR 2007»
13 years 5 months ago
Two-stage general block patterns for the two-dimensional cutting problem
This paper presents an algorithm for the unconstrained two-dimensional cutting problem of rectangular pieces. It proposes the two-stage general block pattern that can be cut into ...
Yaodong Cui, Xianquan Zhang
COR
2007
99views more  COR 2007»
13 years 5 months ago
An improved algorithm for the p-center problem on interval graphs with unit lengths
The p-center problem is to locate p facilities in a network of n demand points so as to minimize the longest distance between a demand point and its nearest facility. We consider ...
T. C. Edwin Cheng, Liying Kang, C. T. Ng