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| package org.sat4j.minisat.learning; |
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| import org.sat4j.minisat.core.Constr; |
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| import org.sat4j.minisat.core.IOrder; |
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| public class ActiveLearning extends LimitedLearning { |
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| private static final long serialVersionUID = 1L; |
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| private final double percent; |
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| private IOrder order; |
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| public ActiveLearning() {
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| this(0.95);
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| } |
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| public ActiveLearning(double d) {
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| this.percent = d;
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| } |
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| public void setOrder(IOrder order) {
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| this.order = order;
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| } |
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86109
| @Override
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| protected boolean learningCondition(Constr clause) { |
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86109
| int nbactivevars = 0;
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86109
| for (int i = 0; i < clause.size(); i++) {
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2498007
| if (order.varActivity(clause.get(i)) > 1) {
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| nbactivevars++;
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| } |
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| } |
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86109
| return nbactivevars > clause.size() * percent;
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| } |
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| @Override
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| public String toString() { |
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| return "Limit learning to clauses containing active literals";
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| } |
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| } |