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illustrate RegretInsertion

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oblonski 2014-12-10 11:33:08 +01:00
parent 370a5af55d
commit c472042781
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66
jsprit-examples/input/algorithmConfig_greedyWithRegret.xml Executable file
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<?xml version="1.0" ?>
<!--~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Copyright (C) 2014 Stefan Schroeder
~
~ This library is free software; you can redistribute it and/or
~ modify it under the terms of the GNU Lesser General Public
~ License as published by the Free Software Foundation; either
~ version 3.0 of the License, or (at your option) any later version.
~
~ This library is distributed in the hope that it will be useful,
~ but WITHOUT ANY WARRANTY; without even the implied warranty of
~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
~ Lesser General Public License for more details.
~
~ You should have received a copy of the GNU Lesser General Public
~ License along with this library. If not, see <http://www.gnu.org/licenses/>.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-->
<algorithm xmlns="http://www.w3schools.com"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3schools.com algorithm_schema.xsd">
<iterations>2000</iterations>
<construction>
<insertion name="regretInsertion">
</insertion>
</construction>
<strategy>
<memory>1</memory>
<searchStrategies>
<searchStrategy name="randomRuinAndRecreate">
<selector name="selectBest"/>
<acceptor name="greedyAcceptance"/>
<modules>
<module name="ruin_and_recreate">
<ruin name="randomRuin">
<share>0.5</share>
</ruin>
<insertion name="regretInsertion"/>
</module>
</modules>
<probability>0.5</probability>
</searchStrategy>
<searchStrategy name="radialRuinAndRecreate">
<selector name="selectBest"/>
<acceptor name="greedyAcceptance"/>
<modules>
<module name="ruin_and_recreate">
<ruin name="radialRuin">
<share>0.3</share>
</ruin>
<insertion name="regretInsertion"/>
</module>
</modules>
<probability>0.5</probability>
</searchStrategy>
</searchStrategies>
</strategy>
</algorithm>

111
jsprit-examples/src/main/java/jsprit/examples/SolomonWithRegretInsertionExample.java Normal file
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/*******************************************************************************
* Copyright (C) 2014 Stefan Schroeder
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3.0 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package jsprit.examples;
import jsprit.analysis.toolbox.AlgorithmEventsRecorder;
import jsprit.analysis.toolbox.AlgorithmEventsViewer;
import jsprit.analysis.toolbox.GraphStreamViewer;
import jsprit.analysis.toolbox.GraphStreamViewer.Label;
import jsprit.analysis.toolbox.Plotter;
import jsprit.core.algorithm.VehicleRoutingAlgorithm;
import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
import jsprit.core.algorithm.selector.SelectBest;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import jsprit.core.reporting.SolutionPrinter;
import jsprit.instance.reader.SolomonReader;
import jsprit.util.Examples;
import java.io.File;
import java.util.Collection;
public class SolomonWithRegretInsertionExample {
public static void main(String[] args) {
/*
* some preparation - create output folder
*/
Examples.createOutputFolder();
/*
* Build the problem.
*
* But define a problem-builder first.
*/
VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
/*
* A solomonReader reads solomon-instance files, and stores the required information in the builder.
*/
new SolomonReader(vrpBuilder).read("input/C101_solomon.txt");
/*
* Finally, the problem can be built. By default, transportCosts are crowFlyDistances (as usually used for vrp-instances).
*/
VehicleRoutingProblem vrp = vrpBuilder.build();
new Plotter(vrp).plot("output/solomon_C101.png", "C101");
/*
* Define the required vehicle-routing algorithms to solve the above problem.
*
* The algorithm can be defined and configured in an xml-file.
*/
VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.readAndCreateAlgorithm(vrp, 2, "input/algorithmConfig_greedyWithRegret.xml");
vra.setMaxIterations(50);
AlgorithmEventsRecorder eventsRecorder = new AlgorithmEventsRecorder(vrp,new File("output/events.dgs.gz"));
eventsRecorder.setRecordingRange(0,50);
vra.addListener(eventsRecorder);
/*
* Solve the problem.
*
*
*/
Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
/*
* Retrieve best solution.
*/
VehicleRoutingProblemSolution solution = new SelectBest().selectSolution(solutions);
/*
* print solution
*/
SolutionPrinter.print(vrp, solution, SolutionPrinter.Print.VERBOSE);
/*
* Plot solution.
*/
Plotter plotter = new Plotter(vrp,solution);
// plotter.setBoundingBox(30, 0, 50, 20);
plotter.plot("output/solomon_C101_solution.png", "C101");
new GraphStreamViewer(vrp,solution).labelWith(Label.ID).setRenderDelay(100).display();
AlgorithmEventsViewer viewer = new AlgorithmEventsViewer();
viewer.setRuinDelay(16);
viewer.setRecreationDelay(8);
viewer.display("output/events.dgs.gz");
}
}