dragon.ir.search.smooth

Class QueryFirstTransSmoother

java.lang.Object

dragon.ir.search.smooth.AbstractSmoother

dragon.ir.search.smooth.QueryFirstTransSmoother

All Implemented Interfaces:

Smoother

public class QueryFirstTransSmoother
extends AbstractSmoother

A Smoother using relation-term translations

Copyright: Copyright (c) 2005

Company: IST, Drexel University

Version:

1.0

Author:

Davis Zhou

Field Summary

Fields inherited from class dragon.ir.search.smooth.AbstractSmoother

docFirstOptimal, querytermFirstOptimal, queryWeight, useLog

Constructor Summary

Constructors

Constructor and Description
QueryFirstTransSmoother(IndexReader reader, DoubleSparseMatrix transposedTransMatrix, boolean relationTrans, double transCoefficient, Smoother basicSmoother)
QueryFirstTransSmoother(IndexReader srcIndexReader, IndexReader destIndexReader, DoubleSparseMatrix transposedTransMatrix, double transCoefficient, Smoother basicSmoother)

Method Summary

Modifier and Type	Method and Description
protected double	computeSmoothedProb(int termFrequency)
Smoother	getBasicSmoother()
double	getTranslationCoefficient()
DoubleSparseMatrix	getTranslationMatrix()
double	getTranslationProb(int docIndex)
void	setDoc(IRDoc doc) Set the current document for processing
boolean	setParameters(double[] params)
void	setQueryTerm(SimpleTermPredicate queryTerm) Set the current query term for processing
void	setTranslationMatrix(DoubleSparseMatrix transposedTransMatrix)

Methods inherited from class dragon.ir.search.smooth.AbstractSmoother

getLogLikelihoodOption, getProb, getSmoothedProb, getSmoothedProb, getSmoothedProb, getSmoothedProb, getSmoothedProb, getSmoothedProb, getSmoothedProb, isDocFirstOptimal, isQueryTermFirstOptimal, setLogLikelihoodOption

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryFirstTransSmoother

public QueryFirstTransSmoother(IndexReader reader,
                               DoubleSparseMatrix transposedTransMatrix,
                               boolean relationTrans,
                               double transCoefficient,
                               Smoother basicSmoother)

QueryFirstTransSmoother

public QueryFirstTransSmoother(IndexReader srcIndexReader,
                               IndexReader destIndexReader,
                               DoubleSparseMatrix transposedTransMatrix,
                               double transCoefficient,
                               Smoother basicSmoother)

Method Detail

setTranslationMatrix

public void setTranslationMatrix(DoubleSparseMatrix transposedTransMatrix)

getTranslationMatrix

public DoubleSparseMatrix getTranslationMatrix()

setParameters

public boolean setParameters(double[] params)

Parameters:

params - paramteres for the current smoother

Returns:

true if successful

getBasicSmoother

public Smoother getBasicSmoother()

getTranslationCoefficient

public double getTranslationCoefficient()

setQueryTerm

public void setQueryTerm(SimpleTermPredicate queryTerm)

Description copied from interface: Smoother

Set the current query term for processing

Parameters:

queryTerm - the query term

setDoc

public void setDoc(IRDoc doc)

Description copied from interface: Smoother

Set the current document for processing

Parameters:

doc - the document

getTranslationProb

public double getTranslationProb(int docIndex)

computeSmoothedProb

protected double computeSmoothedProb(int termFrequency)

Specified by:

computeSmoothedProb in class AbstractSmoother