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Code Issues Releases Wiki Activity

add javadoc to acceptors

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This commit is contained in:
oblonski 2014-08-28 05:55:54 +02:00
parent d551be0ca5
commit 55ffe3970f
5 changed files with 62 additions and 57 deletions
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18
jsprit-core/src/main/java/jsprit/core/algorithm/acceptor/AcceptNewRemoveFirst.java
View file

@ -1,27 +1,29 @@
/*******************************************************************************
* Copyright (C) 2013 Stefan Schroeder
*
* 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
* 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.core.algorithm.acceptor;
import java.util.Collection;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import java.util.Collection;
/**
* @deprecated use GreedyAcceptance instead
*/
@Deprecated
public class AcceptNewRemoveFirst implements SolutionAcceptor{
private final int solutionMemory;

19
jsprit-core/src/main/java/jsprit/core/algorithm/acceptor/GreedyAcceptance.java
View file

@ -1,16 +1,16 @@
/*******************************************************************************
* Copyright (C) 2013 Stefan Schroeder
*
* 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
* 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/>.
******************************************************************************/
@ -21,7 +21,12 @@ import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import java.util.Collection;
/**
* Acceptor that accepts solutions to be memorized only better solutions.
*
* <p>If there is enough memory, every solution will be accepted. If there is no memory anymore and the solution
* to be evaluated is better than the worst, the worst will be replaced by the new solution.</p>
*/
public class GreedyAcceptance implements SolutionAcceptor{
private final int solutionMemory;
@ -59,7 +64,7 @@ public class GreedyAcceptance implements SolutionAcceptor{
@Override
public String toString() {
return "[name=acceptNewRemoveWorst]";
return "[name=GreedyAcceptance]";
}

14
jsprit-core/src/main/java/jsprit/core/algorithm/acceptor/GreedyAcceptance_minVehFirst.java
View file

@ -1,27 +1,27 @@
/*******************************************************************************
* Copyright (C) 2013 Stefan Schroeder
*
* 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
* 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.core.algorithm.acceptor;
import java.util.Collection;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import java.util.Collection;
@Deprecated
public class GreedyAcceptance_minVehFirst implements SolutionAcceptor{
private final int solutionMemory;

48
jsprit-core/src/main/java/jsprit/core/algorithm/acceptor/SchrimpfAcceptance.java
View file

@ -1,16 +1,16 @@
/*******************************************************************************
* Copyright (C) 2013 Stefan Schroeder
*
* 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
* 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/>.
******************************************************************************/
@ -101,11 +101,7 @@ public class SchrimpfAcceptance implements SolutionAcceptor, IterationStartsList
}
/**
*
* @param solutionMemory
* @param alpha
* @param nOfWarmupIterations
* @Deprecated use <code>new SchrimpfAcceptance(solutionMemory,alpha)</code> instead. if you want to determine ini-threshold with a
* @deprecated use <code>new SchrimpfAcceptance(solutionMemory,alpha)</code> instead. if you want to determine ini-threshold with a
* random walk and the algorithm 'randomWalk.xml' use SchrimpfInitialThresholdGenerator.class instead.
*/
@Deprecated
@ -130,7 +126,11 @@ public class SchrimpfAcceptance implements SolutionAcceptor, IterationStartsList
if(worst == null) worst = solutionInMemory;
else if(solutionInMemory.getCost() > worst.getCost()) worst = solutionInMemory;
}
if(newSolution.getCost() < worst.getCost() + threshold){
if(worst == null){
solutions.add(newSolution);
solutionAccepted = true;
}
else if(newSolution.getCost() < worst.getCost() + threshold){
solutions.remove(worst);
solutions.add(newSolution);
solutionAccepted = true;
@ -141,17 +141,17 @@ public class SchrimpfAcceptance implements SolutionAcceptor, IterationStartsList
@Override
public String toString() {
return "[name=schrimpfAcceptanceFunction][alpha="+alpha+"][warmup=" + nOfRandomWalks + "]";
return "[name=SchrimpfAcceptance][alpha="+alpha+"][warmup=" + nOfRandomWalks + "]";
}
private double getThreshold(int iteration) {
double scheduleVariable = (double) iteration / (double) nOfTotalIterations;
double currentThreshold = initialThreshold * Math.exp(-1. * Math.log(2) * scheduleVariable / alpha);
return currentThreshold;
return initialThreshold * Math.exp(-1. * Math.log(2) * scheduleVariable / alpha);
}
public double getInitialThreshold(){
@SuppressWarnings("UnusedDeclaration")
public double getInitialThreshold(){
return initialThreshold;
}
@ -177,39 +177,39 @@ public class SchrimpfAcceptance implements SolutionAcceptor, IterationStartsList
logger.info("prepare schrimpfAcceptanceFunction, i.e. determine initial threshold");
logger.info("start random-walk (see randomWalk.xml)");
double now = System.currentTimeMillis();
this.nOfTotalIterations = algorithm.getNuOfIterations();
this.nOfTotalIterations = algorithm.getMaxIterations();
/*
* randomWalk to determine standardDev
*/
final double[] results = new double[nOfRandomWalks];
URL resource = Resource.getAsURL("randomWalk.xml");
AlgorithmConfig algorithmConfig = new AlgorithmConfig();
new AlgorithmConfigXmlReader(algorithmConfig).read(resource);
VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.createAlgorithm(problem, algorithmConfig);
vra.setNuOfIterations(nOfRandomWalks);
vra.setMaxIterations(nOfRandomWalks);
vra.getAlgorithmListeners().addListener(new IterationEndsListener() {
@Override
public void informIterationEnds(int iteration, VehicleRoutingProblem problem, Collection<VehicleRoutingProblemSolution> solutions) {
double result = Solutions.bestOf(solutions).getCost();
// logger.info("result="+result);
results[iteration-1] = result;
}
});
vra.searchSolutions();
StandardDeviation dev = new StandardDeviation();
double standardDeviation = dev.evaluate(results);
initialThreshold = standardDeviation / 2;
logger.info("warmup done");
logger.info("total time: " + ((System.currentTimeMillis()-now)/1000.0) + "s");
logger.info("initial threshold: " + initialThreshold);
logger.info("---------------------------------------------------------------------");
}
private void reset() {

20
jsprit-core/src/main/java/jsprit/core/algorithm/acceptor/SchrimpfInitialThresholdGenerator.java
View file

@ -1,20 +1,18 @@
/*******************************************************************************
* Copyright (c) 2014 Stefan Schroeder.
*
* 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
* 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
* 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/>.
*
* Contributors:
* Stefan Schroeder - initial API and implementation
******************************************************************************/
package jsprit.core.algorithm.acceptor;
@ -65,7 +63,7 @@ public class SchrimpfInitialThresholdGenerator implements AlgorithmStartsListene
AlgorithmConfig algorithmConfig = new AlgorithmConfig();
new AlgorithmConfigXmlReader(algorithmConfig).read(resource);
VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.createAlgorithm(problem, algorithmConfig);
vra.setNuOfIterations(nOfRandomWalks);
vra.setMaxIterations(nOfRandomWalks);
vra.getAlgorithmListeners().addListener(new IterationEndsListener() {
@Override