By Wira Redi, Hamid Mokhtar, Mohan Krishnamoorthy, and Andreas T. Ernst; Nov 25th, 2017
The main directory is ICD. It contains original instances. The other directories contain modified version of the orignial instances to either include more rail links, or consider a discount factor for usage of rail links in the problem input.
<ICD> The set of original instances
<ICD10xtra> The set of instances with 10% more rail links than the original ones
<ICD25xtra> The set of instances with 25% more rail links than the original ones
<ICD66prcnt> The set of instances whose rail transfer costs are discounted by 66%
<ICD99prcnt> The set of instances whose rail transfer costs are discounted by 99%
Each directory contains the Indonesian Container Distribution network design datasets. The format of each file is as below:
file name: <n>.<h>.<p>.<q> - data file for <n> nodes, <h> potential hubs, <p> number of hubs, and <q> minimum number of rail terminals.
file name: Fcost<n>.<h> - data file for fixed costs and intermodal change costs corresponding to <n>.<h>.<p>.<q> for all <p> and <q>.
genInstances.py: Use this python code script to generate more instances. Basically, using input file, it generates other possible instances with different <p> and <q>, while <n> and <h> remains unchanged. Output files will be writen in the same folder as the input.
usage: (run in shell script)
$ python genInstances.py DIRECTORY Instance format: <n>.<h>.<p>.<q>
<n> Number of nodes including potential hubs
<a> Number of arcs
<m> Number of modes
<h> Number of potential hubs
<p> Number of hubs
<q> Minimum number of rail hubs
<c1> <c2> <c3> Cost factors for modes 1,...,m {m= 1 for sea,m=2 for road,m=3 for rail}
<s> Number of potential inland hubs
<S1> ... <Ss> Potential inland hubs
<i_1> <j_1> <d_1> <m_1> Travel distance (in meter) <d_t> from <i_t> to <j_t> with mode <m_t>
:
:
<i_a> <j_a> <d_a> <m_a>
<w[1][1]> <w[1][2]> ... <w[1][n-h]> flow from the first O/D node to all others
: : :
: : :
<w[n-h][1]> <w[n-h][2]> ... <w[n-h][n-h]> flow from n-h demand nodes to all others
<F_1> The fixed cost of potential hub <1>
<F_2>
.
.
.
<F_h>
G<1,2> G<1,3> G<k,l> is the change-mode cost factor from mode k to mode l at a seaport
G<2,1> G<2,3> G'<2,3> G'<k,l> is the change-mode cost factor from mode k to mode l at an inland hub
G<3,1> G<3,2> G'<3,2>