A study on the column subtraction method applied to ship scheduling problem

- Journal title : Journal of Navigation and Port Research
- Volume 28, Issue 2, 2004, pp.129-133
- Publisher : Korean Institute of Navigation and Port Research
- DOI : 10.5394/KINPR.2004.28.2.129

Title & Authors

A study on the column subtraction method applied to ship scheduling problem

Hwang, Hee-Su; Lee, Hee-Yong; Kim, Si-Hwa;

Hwang, Hee-Su; Lee, Hee-Yong; Kim, Si-Hwa;

Abstract

Column subtraction, originally proposed by Harche and Thompson(1994), is an exact method for solving large set covering, packing and partitioning problems. Since the constraint set of ship scheduling problem(SSP) have a special structure, most instances of SSP can be solved by LP relaxation This paper aim, at applying the column subtraction method to solve SSP which am not be solved by LP relaxation For remained instances of unsolvable ones, we subtract columns from the finale simplex table to get another integer solution in an iterative manner. Computational results having up to 10,000 0-1 variables show better performance of the column subtraction method solving the remained instances of SSP than complex branch and-bound algorithm by LINDO.

Keywords

Column Subtraction;Ship Scheduling Problem;Set Packing;Set Partitioning;Set Covering;Branch-and-Bound;

Language

English

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