moj.ri.weighting
Class MartinsWS

java.lang.Object
  moj.ri.weighting.WeightingScheme
      moj.ri.weighting.MartinsWS

All Implemented Interfaces:

java.io.Serializable

public class MartinsWS
extends WeightingScheme

Calculates the weighting based upon the distance to the current label in the following manner: weight=(1/distance to focus word) but also gives a higher weight to content words. The index term (word) should be in the form word_pos for this WeightingScheme to work properly.

Version:

2004-Nov-23

Author:

Martin Hassel

See Also:

Serialized Form

Constructor Summary

MartinsWS()

Method Summary

float[]	applyLeftWeighting(RandomLabel focusLabel, int distance, RandomLabel leftContextLabel) Calculates the weight based upon the distance (in the left context) to the current label in the following manner: weight=(1/distance to focus word)
float[]	applyRightWeighting(RandomLabel focusLabel, int distance, RandomLabel rightContextLabel) Calculates the weight based upon the distance (in the right context) to the current label in the following manner: weight=(1/distance to focus word)

Methods inherited from class moj.ri.weighting.WeightingScheme

setIndex

Methods inherited from class java.lang.Object

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

Constructor Detail

MartinsWS

public MartinsWS()

Method Detail

applyLeftWeighting

public float[] applyLeftWeighting(RandomLabel focusLabel,
                                  int distance,
                                  RandomLabel leftContextLabel)

Calculates the weight based upon the distance (in the left context) to the current label in the following manner: weight=(1/distance to focus word)

Specified by:

applyLeftWeighting in class WeightingScheme

Parameters:

focusLabel - RandomLabel in focus, i.e. the focus word whose context vector should be modified with the weighted RandomLabel in left context.

distance - leftward distance to the focus word (RandomLabel).

leftContextLabel - RandomLabel in left context at distance from the focus word, which can be used together with distance to calculate the weight.

Returns:

the context of the focus word modified according to the weighting scheme.

applyRightWeighting

public float[] applyRightWeighting(RandomLabel focusLabel,
                                   int distance,
                                   RandomLabel rightContextLabel)

Calculates the weight based upon the distance (in the right context) to the current label in the following manner: weight=(1/distance to focus word)

Specified by:

applyRightWeighting in class WeightingScheme

Parameters:

focusLabel - RandomLabel in focus, i.e. the focus word whose context vector should be modified with the weighted RandomLabel in right context.

distance - rightward distance to the focus word (RandomLabel).

rightContextLabel - RandomLabel in right context at distance from the focus word, which can be used together with distance to calculate the weight.

Returns:

the context of the focus word modified according to the weighting scheme.