Package org.tweetyproject.logics.pl.analysis

Class DHitSatInconsistencyMeasure

java.lang.Object

org.tweetyproject.logics.commons.analysis.BeliefSetInconsistencyMeasure<PlFormula>

org.tweetyproject.logics.pl.analysis.SatBasedInconsistencyMeasure

org.tweetyproject.logics.pl.analysis.DHitSatInconsistencyMeasure

All Implemented Interfaces:

PostulateEvaluatable<PlFormula>, InconsistencyMeasure<BeliefSet<PlFormula,?>>

public class DHitSatInconsistencyMeasure
extends SatBasedInconsistencyMeasure

This class presents a sat-encoding-based implementation of the hit-distance measure of [Grant and Hunter, “Analysing inconsistent information using distance-based measures” Int. J. Approx. Reasoning, 2017]. The hit-distance measure calculates an interpretation such that the number of distances greater than 0 to the models of each formula is minimal. The value of the inconsistency is than exactly this number of distances.
Note: This implementation may produce different results than DHitInconsistencyMeasure in a few cases because the latter implements a slightly different interpretation of the measure.

Author:

Anna Gessler

Field Summary

Fields inherited from interface org.tweetyproject.logics.commons.analysis.InconsistencyMeasure

MEASURE_TOLERANCE

Constructor Summary

Constructors

Constructor	Description
DHitSatInconsistencyMeasure()	Create a new DHitSatInconsistencyMeasure with the default SAT solver.
DHitSatInconsistencyMeasure(SatSolver solver)	Create a new DHitSatInconsistencyMeasure with the given SAT solver.

Method Summary

Modifier and Type	Method	Description
PlBeliefSet	getSATEncoding(Collection<PlFormula> kb, int upper_bound)
Double	inconsistencyMeasure(Collection<PlFormula> kb)	This method measures the inconsistency of the given set of formulas.
String	toString()

Methods inherited from class org.tweetyproject.logics.commons.analysis.BeliefSetInconsistencyMeasure

inconsistencyMeasure

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

DHitSatInconsistencyMeasure

public DHitSatInconsistencyMeasure(SatSolver solver)

Create a new DHitSatInconsistencyMeasure with the given SAT solver.

Parameters:

solver - some SAT solver

DHitSatInconsistencyMeasure

public DHitSatInconsistencyMeasure()

Create a new DHitSatInconsistencyMeasure with the default SAT solver.

Method Details

inconsistencyMeasure

public Double inconsistencyMeasure(Collection<PlFormula> kb)

Description copied from class: BeliefSetInconsistencyMeasure

This method measures the inconsistency of the given set of formulas.

Specified by:

inconsistencyMeasure in class BeliefSetInconsistencyMeasure<PlFormula>

Parameters:

kb - a collection of formulas.

Returns:

a Double indicating the degree of inconsistency.

getSATEncoding

public PlBeliefSet getSATEncoding(Collection<PlFormula> kb,
 int upper_bound)

toString

public String toString()

Overrides:

toString in class Object