本文整理汇总了Java中org.cpsolver.ifs.heuristics.RouletteWheelSelection类的典型用法代码示例。如果您正苦于以下问题：Java RouletteWheelSelection类的具体用法？Java RouletteWheelSelection怎么用？Java RouletteWheelSelection使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
RouletteWheelSelection类属于org.cpsolver.ifs.heuristics包，在下文中一共展示了RouletteWheelSelection类的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: getRoulette
import org.cpsolver.ifs.heuristics.RouletteWheelSelection; //导入依赖的package包/类
/** Populate roulette wheel selection, if null or empty.
* @param solution current solution
* @return selection
**/
protected RouletteWheelSelection<Request> getRoulette(Solution<Request, Enrollment> solution) {
if (iRoulette != null && iRoulette.hasMoreElements()) {
if (iRoulette.getUsedPoints() < 0.1 * iRoulette.getTotalPoints())
return iRoulette;
}
iRoulette = new RouletteWheelSelection<Request>();
for (Request request : ((StudentSectioningModel) solution.getModel()).variables()) {
double points = 0;
if (solution.getAssignment().getValue(request) == null)
points += 10;
else {
Enrollment enrollment = solution.getAssignment().getValue(request);
if (enrollment.toDouble(solution.getAssignment()) > request.getBound())
points += 1;
}
if (points > 0)
iRoulette.add(request, points);
}
return iRoulette;
}
示例2: StudentPreferencePenalties
import org.cpsolver.ifs.heuristics.RouletteWheelSelection; //导入依赖的package包/类
public StudentPreferencePenalties(DistType disributionType) {
RouletteWheelSelection<int[]> roulette = new RouletteWheelSelection<int[]>();
for (int d = 0; d < sStudentRequestDistribution.length; d++)
for (int t = 0; t < sStudentRequestDistribution[d].length; t++) {
switch (disributionType) {
case Uniform:
roulette.add(new int[] { d, t }, 1);
break;
case Preference:
roulette.add(new int[] { d, t }, sStudentRequestDistribution[d][t]);
break;
case PreferenceQuadratic:
roulette.add(new int[] { d, t }, sStudentRequestDistribution[d][t] * sStudentRequestDistribution[d][t]);
break;
case PreferenceReverse:
roulette.add(new int[] { d, t }, 11 - sStudentRequestDistribution[d][t]);
break;
default:
roulette.add(new int[] { d, t }, 1);
break;
}
}
int idx = 0;
while (roulette.hasMoreElements()) {
int[] dt = roulette.nextElement();
iWeight.put(dt[0] + "." + dt[1], new Double(((double) idx) / (roulette.size() - 1)));
idx++;
}
}
示例3: StudentPreferencePenalties
import org.cpsolver.ifs.heuristics.RouletteWheelSelection; //导入依赖的package包/类
/**
* Constructor. All possible times are ordered based on the distribution
* defined by {@link StudentPreferencePenalties#sStudentRequestDistribution}
* . The first time gets zero penalty, the second 1/nrTimes, the third
* 2/nrTimes etc. where nrTimes is the number of times in
* {@link StudentPreferencePenalties#sStudentRequestDistribution}.
* @param disributionType distribution type
*/
public StudentPreferencePenalties(int disributionType) {
RouletteWheelSelection<int[]> roulette = new RouletteWheelSelection<int[]>();
for (int d = 0; d < sStudentRequestDistribution.length; d++)
for (int t = 0; t < sStudentRequestDistribution[d].length; t++) {
if (disributionType == sDistTypeUniform) {
roulette.add(new int[] { d, t }, 1);
} else if (disributionType == sDistTypePreference) {
roulette.add(new int[] { d, t }, sStudentRequestDistribution[d][t]);
} else if (disributionType == sDistTypePreferenceQuadratic) {
roulette.add(new int[] { d, t }, sStudentRequestDistribution[d][t]
* sStudentRequestDistribution[d][t]);
} else if (disributionType == sDistTypePreferenceReverse) {
roulette.add(new int[] { d, t }, 11 - sStudentRequestDistribution[d][t]);
} else {
roulette.add(new int[] { d, t }, 1);
}
}
int idx = 0;
while (roulette.hasMoreElements()) {
int[] dt = roulette.nextElement();
iWeight.put(dt[0] + "." + dt[1], new Double(((double) idx) / (roulette.size() - 1)));
if (sDebug)
sLog.debug(" -- " + (idx + 1) + ". preference is " + toString(dt[0], dt[1]) + " (P:"
+ sDF.format(((double) idx) / (roulette.size() - 1)) + ")");
idx++;
}
}