net.sf.cpsolver.studentsct.heuristics.selection
Class RndUnProblStudSelection
java.lang.Object
net.sf.cpsolver.studentsct.heuristics.selection.RandomUnassignmentSelection
net.sf.cpsolver.studentsct.heuristics.selection.RndUnProblStudSelection
- All Implemented Interfaces:
- NeighbourSelection<Request,Enrollment>
public class RndUnProblStudSelection
- extends RandomUnassignmentSelection
Random unassignment of some problematic students. Problematic students are to
be provided by a neighbour selection that was used before this one by
RoundRobinNeighbourSelection
.
In each step a problematic student is randomly selected with the given
probabilty. Null is returned otherwise (the controll is passed to the next
NeighbourSelection
).
Parameters:
Parameter |
Type |
Comment |
Neighbour.RandomUnassignmentOfProblemStudentProb |
Double |
Probability of a random selection of a student from the given set of
problematic students. |
- Version:
- StudentSct 1.2 (Student Sectioning)
Copyright (C) 2007 - 2010 Tomas Muller
muller@unitime.org
http://muller.unitime.org
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 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/.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
RndUnProblStudSelection
public RndUnProblStudSelection(DataProperties properties,
ProblemStudentsProvider psp)
- Constructor
- Parameters:
properties
- configurationpsp
- a class that provides the set of problematic students
init
public void init(Solver<Request,Enrollment> solver)
- Initialization --
ProblemStudentsProvider.getProblemStudents()
is
called
- Specified by:
init
in interface NeighbourSelection<Request,Enrollment>
- Overrides:
init
in class RandomUnassignmentSelection
selectNeighbour
public Neighbour<Request,Enrollment> selectNeighbour(Solution<Request,Enrollment> solution)
- With the given probabilty, a problematic student is randomly selected to
be unassigned. Null is returned otherwise.
- Specified by:
selectNeighbour
in interface NeighbourSelection<Request,Enrollment>
- Overrides:
selectNeighbour
in class RandomUnassignmentSelection
- Parameters:
solution
- given solution
- Returns:
- a neighbour assignment
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