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add example for VRP with heterogeneous fleet as well as an example of

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how to benchmark it
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oblonski 2014-01-15 09:00:55 -05:00
parent 66df42ac2e
commit 9d1bbc2e84
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jsprit-examples/src/main/java/jsprit/examples/HVRPBenchmarkExample.java Normal file
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package jsprit.examples;
import java.util.Collection;
import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
import jsprit.analysis.toolbox.GraphStreamViewer;
import jsprit.analysis.toolbox.Plotter;
import jsprit.analysis.toolbox.SolutionPrinter;
import jsprit.analysis.toolbox.SolutionPrinter.Print;
import jsprit.core.algorithm.VehicleRoutingAlgorithm;
import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import jsprit.core.problem.solution.route.VehicleRoute;
import jsprit.core.util.Solutions;
import jsprit.instance.reader.VrphGoldenReader;
import jsprit.instance.reader.VrphGoldenReader.VrphType;
/**
* Shows how to benchmark the algorithm on different classical HVRP and FSM instances.
*
* <p>These instances are from Golden and Taillard and copied from http://mistic.heig-vd.ch/taillard/problemes.dir/vrp.dir/vrp.html.
*
* <p>You can find best results of different problems, instances and authors here:
* <br><a href="http://www2.ic.uff.br/~satoru/conteudo/artigos/PAPER%20PUCA-JHeuristics-2011.pdf">http://www2.ic.uff.br/~satoru/conteudo/artigos/PAPER%20PUCA-JHeuristics-2011.pdf</a>
* <br><a href="http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.100.2331&rep=rep1&type=pdf">http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.100.2331&rep=rep1&type=pdf</a>
*
* @author schroeder
*
*/
public class HVRPBenchmarkExample {
public static void main(String[] args) {
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
//read modified Golden-instance, you can find all relevant instances in jsprit-instances/instances/vrph
//you can build various problems, see VrphType doc for more details
new VrphGoldenReader(vrpBuilder, VrphType.HVRPFD).read("input/cn_14mix.txt");
vrpBuilder.addPenaltyVehicles(10.0);
VehicleRoutingProblem vrp = vrpBuilder.build();
VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.readAndCreateAlgorithm(vrp, "input/algorithmConfig_considerFixedCosts.xml");
vra.setNuOfIterations(10000);
// vra.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(500));
vra.addListener(new AlgorithmSearchProgressChartListener("output/progress.png"));
Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
VehicleRoutingProblemSolution best = Solutions.bestOf(solutions);
SolutionPrinter.print(vrp, best, Print.VERBOSE);
Plotter plotter = new Plotter(vrp,best);
plotter.plot("output/cn14.png", "cn14");
new GraphStreamViewer(vrp, best).setRenderDelay(100).display();
}
}