Sciweavers

COR
2011
13 years 7 months ago
A squeaky wheel optimisation methodology for two-dimensional strip packing
The two dimensional strip packing problem occurs in industries such as metal, wood, glass, paper, and textiles. The problem involves cutting shapes from a larger stock sheet or ro...
Edmund K. Burke, Matthew R. Hyde, Graham Kendall
COR
2011
13 years 7 months ago
Faster integer-feasibility in mixed-integer linear programs by branching to force change
Branching in mixed-integer (or integer) linear programming requires choosing both the branching variable and the branching direction. This paper develops a number of new methods f...
Jennifer Pryor, John W. Chinneck
COR
2011
13 years 7 months ago
Event-based MILP models for resource-constrained project scheduling problems
In this paper we make a comparative study of several mixed integer linear programming (MILP) formulations for resource-constrained project scheduling problems (RCPSPs). First, we ...
Oumar Koné, Christian Artigues, Pierre Lope...
COR
2011
13 years 7 months ago
Size-reduction heuristics for the unrelated parallel machines scheduling problem
In this paper we study the unrelated parallel machines problem where n independent jobs must be assigned to one out of m parallel machines and the processing time of each job diļ¬...
Luis Fanjul-Peyro, Rubén Ruiz
COR
2011
13 years 7 months ago
Time-constrained project scheduling with adjacent resources
We develop a decomposition method for the Time-Constrained Project Scheduling Problem (TCPSP) with Adjacent Resources. For adjacent resources the resource units are ordered and th...
Johann Hurink, A. L. Kok, Jacob Jan Paulus, J. M. ...
COR
2011
13 years 7 months ago
MIP models for connected facility location: A theoretical and computational study
This article comprises the ļ¬rst theoretical and computational study on mixed integer programming (MIP) models for the connected facility location problem (ConFL). ConFL combines...
Stefan Gollowitzer, Ivana Ljubic
COR
2011
13 years 7 months ago
An improved multi-objective evolutionary algorithm for the vehicle routing problem with time windows
The Vehicle Routing Problem with Time Windows is a complex combinatorial problem with many real-world applications in transportation and distribution logistics. Its main objective...
Abel Garcia-Najera, John A. Bullinaria
COR
2011
13 years 7 months ago
On the application of graph colouring techniques in round-robin sports scheduling
The purpose of this paper is twofold. First, it explores the issue of producing valid, compact round-robin sports schedules by considering the problem as one of graph colouring. U...
R. Lewis, J. Thompson
CONSTRAINTS
2011
13 years 7 months ago
Dantzig-Wolfe decomposition and branch-and-price solving in G12
Abstract The G12 project is developing a software environment for stating and solving combinatorial problems by mapping a high-level model of the problem to an eļ¬ƒcient combinatio...
Jakob Puchinger, Peter J. Stuckey, Mark G. Wallace...