dragon.ir.search.expand

Class InformationFlowQE

java.lang.Object

dragon.ir.search.expand.AbstractQE

dragon.ir.search.expand.InformationFlowQE

All Implemented Interfaces:

QueryExpansion

public class InformationFlowQE
extends AbstractQE
implements QueryExpansion

Query Expansion based on Information Flow

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Constructor Summary

Constructors

Constructor and Description
InformationFlowQE(HALSpace halSpace, IndexReader indexReader, int expandTermNum, double expandCoeffi)
InformationFlowQE(IndexReader indexReader, int expandTermNum, double expandCoeffi)

Method Summary

Modifier and Type	Method and Description
IRQuery	expand(IRQuery initQuery)
double	getDominantVectorThreshold()
double	getDominantVectorWeight()
double	getMultiplier()
double	getSubordinateVectorThreshold()
double	getSubordinateVectorWeight()
void	setDominantVectorThreshold(double threshold)
void	setDominantVectorWeight(double weight)
void	setHALSpace(HALSpace halSpace)
void	setMultiplier(double multiplier)
void	setSubordinateVectorThreshold(double threshold)
void	setSubordinateVectorWeight(double weight)

Methods inherited from class dragon.ir.search.expand.AbstractQE

buildQuery, buildSimpleTermPredicate, checkSimpleTermQuery

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

InformationFlowQE

public InformationFlowQE(IndexReader indexReader,
                         int expandTermNum,
                         double expandCoeffi)

InformationFlowQE

public InformationFlowQE(HALSpace halSpace,
                         IndexReader indexReader,
                         int expandTermNum,
                         double expandCoeffi)

Method Detail

setHALSpace

public void setHALSpace(HALSpace halSpace)

setMultiplier

public void setMultiplier(double multiplier)

getMultiplier

public double getMultiplier()

setDominantVectorWeight

public void setDominantVectorWeight(double weight)

getDominantVectorWeight

public double getDominantVectorWeight()

setSubordinateVectorWeight

public void setSubordinateVectorWeight(double weight)

getSubordinateVectorWeight

public double getSubordinateVectorWeight()

setDominantVectorThreshold

public void setDominantVectorThreshold(double threshold)

getDominantVectorThreshold

public double getDominantVectorThreshold()

setSubordinateVectorThreshold

public void setSubordinateVectorThreshold(double threshold)

getSubordinateVectorThreshold

public double getSubordinateVectorThreshold()

expand

public IRQuery expand(IRQuery initQuery)

Specified by:

expand in interface QueryExpansion

Parameters:

initQuery - the initial query

Returns:

the expanded query