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File org.dgpf.search.algorithms.ga.GeneticUtils.java

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/*
 * Copyright (c) 2006 Thomas Weise
 *
 * E-Mail           : tweise@gmx.de
 * Creation Date    : 2006-04-10 06:18:57
 * Original Filename: org.dgpf.search.algorithms.ga.GeneticUtils.java
 * Version          : 2.0.1
 * Last modification: 2006-05-28
 *                by: Thomas Weise
 *
 * License          : GNU LESSER GENERAL PUBLIC LICENSE
 *                    Version 2.1, February 1999
 *                    You should have received a copy of this license along
 *                    with this library; if not, write to the Free Software
 *                    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *                    MA 02111-1307, USA or download the license under
 *                    http://www.gnu.org/copyleft/lesser.html.
 *
 * Warranty         : This software is provided "as is" 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.
 */


package org.dgpf.search.algorithms.ga;

import org.dgpf.search.algorithms.ga.selection.TournamentSelection;
import org.dgpf.search.algorithms.ga.sorting.ComparatorBasedSorting;
import org.sfc.meta.PropertyGroup;
import org.sfc.utils.Typesafe;

/**
 * This class provides some utilities useful for genetic evolving.
 *
 * @author Thomas Weise
 */

public final  class GeneticUtils
  {
/**
 * The genetic properties.
 */

  public  static  final PropertyGroup GENETIC_PROPERTIES =
         new PropertyGroup("genetic");
  
/**
 * The default population size.
 */

  public  static  final int     DEFAULT_POPULATION_SIZE = 512;
/**
 * The maximum population size depends on the memory available on the machine.
 */

  public  static  final int     MAX_POPULATION_SIZE     =
    Math.max(DEFAULT_POPULATION_SIZE,
             (int)(Runtime.getRuntime().maxMemory() >> 10));

/**
 * The default mutation rate.
 */

  public  static  final double  DEFAULT_MUTATION_RATE   = 0.75d;

/**
 * The default crossover rate.
 */

  public  static  final double  DEFAULT_CROSSOVER_RATE  =
                                        (1.0d - DEFAULT_MUTATION_RATE);

/**
 * The default diversity rate.
 */

  public  static  final int     DEFAULT_DIVERSITY_SWAPS = 0;


/**
 * The default sorting algorithm.
 */

  public  static  final SortingAlgorithm    DEFAULT_SORTING_ALGORITHM =
    ComparatorBasedSorting.INSTANCE;
  
/**
 * The default selection algorithm.
 */

  public  static  final SelectionAlgorithm  DEFAULT_SELECTION_ALGORITHM
            = TournamentSelection.DEFAULT_INSTANCE;

/**
 * The default elitism percentage.
 */

  public  static  final double  DEFAULT_ELITISM_PERCENTAGE = 0.05d;
  
/**
 * ah-ah no instantiation of this class is happening!
 */

  private GeneticUtils()
    {
    Typesafe.do_not_call();
    }
  }

File Information:

file name:GeneticUtils.java
package:org.dgpf.search.algorithms.ga
qualified name:org.dgpf.search.algorithms.ga.GeneticUtils.java
file type:Java Source File
download location:download http://dgpf.sourceforge.net/source/org/dgpf/search/algorithms/ga/GeneticUtils.java
size:2.917 KB (2988 B)
uploaded: 2015-07-22 04:10:59 GMT+0000
last update: 2006-06-07 01:42:58 GMT+0000
last access: 2017-11-24 00:22:12 GMT+0000

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