dragon.ir.search.smooth

Class JMSmoother

java.lang.Object

dragon.ir.search.smooth.AbstractSmoother

dragon.ir.search.smooth.JMSmoother

All Implemented Interfaces:

Smoother

public class JMSmoother
extends AbstractSmoother
implements Smoother

Linear interpolation smoother

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
JMSmoother(IRCollection collection, double bkgCoefficient)

Method Summary

Modifier and Type	Method and Description
protected double	computeSmoothedProb(int termFreq)
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

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

Methods inherited from interface dragon.ir.search.smooth.Smoother

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

Constructor Detail

JMSmoother

public JMSmoother(IRCollection collection,
                  double bkgCoefficient)

Method Detail

setParameters

public boolean setParameters(double[] params)

Specified by:

setParameters in interface Smoother

Parameters:

params - paramteres for the current smoother

Returns:

true if successful

setQueryTerm

public void setQueryTerm(SimpleTermPredicate queryTerm)

Description copied from interface: Smoother

Set the current query term for processing

Specified by:

setQueryTerm in interface Smoother

Parameters:

queryTerm - the query term

setDoc

public void setDoc(IRDoc doc)

Description copied from interface: Smoother

Set the current document for processing

Specified by:

setDoc in interface Smoother

Parameters:

doc - the document

computeSmoothedProb

protected double computeSmoothedProb(int termFreq)

Specified by:

computeSmoothedProb in class AbstractSmoother