es.uam.eps.ir.ranksys.diversity.distance.reranking

Class MMR.UserMMR

java.lang.Object

es.uam.eps.ir.ranksys.novdiv.reranking.GreedyReranker.GreedyUserReranker<U,I>

es.uam.eps.ir.ranksys.novdiv.reranking.LambdaReranker.LambdaUserReranker

es.uam.eps.ir.ranksys.diversity.distance.reranking.MMR.UserMMR

Enclosing class:

MMR<U,I>

public class MMR.UserMMR
extends LambdaReranker.LambdaUserReranker

User re-ranker for MMR.

Field Summary

Fields inherited from class es.uam.eps.ir.ranksys.novdiv.reranking.LambdaReranker.LambdaUserReranker

novMap, novStats, relStats

Fields inherited from class es.uam.eps.ir.ranksys.novdiv.reranking.GreedyReranker.GreedyUserReranker

maxLength, recommendation

Constructor Summary

Constructors

Constructor and Description
UserMMR(Recommendation<U,I> recommendation, int maxLength) Constructor.

Method Summary

Modifier and Type	Method and Description
protected double	nov(Tuple2od<I> itemValue) Returns the novelty score of an item.
protected void	update(Tuple2od<I> bestItemValue) Updates the value of the objective function after a selection.

Methods inherited from class es.uam.eps.ir.ranksys.novdiv.reranking.LambdaReranker.LambdaUserReranker

norm, selectItem, value

Methods inherited from class es.uam.eps.ir.ranksys.novdiv.reranking.GreedyReranker.GreedyUserReranker

rerankPermutation

Methods inherited from class java.lang.Object

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

Constructor Detail

UserMMR

public UserMMR(Recommendation<U,I> recommendation,
               int maxLength)

Constructor.

Parameters:

recommendation - input recommendation to be re-ranked

maxLength - maximum length of the re-ranked recommendation

Method Detail

nov

protected double nov(Tuple2od<I> itemValue)

Description copied from class: LambdaReranker.LambdaUserReranker

Returns the novelty score of an item.

Specified by:

nov in class LambdaReranker.LambdaUserReranker

Parameters:

itemValue - item-relevance pair

Returns:

the novelty of the item

update

protected void update(Tuple2od<I> bestItemValue)

Description copied from class: GreedyReranker.GreedyUserReranker

Updates the value of the objective function after a selection.

Specified by:

update in class GreedyReranker.GreedyUserReranker<U,I>

Parameters:

bestItemValue - item-score pair that has been selected to be added to the re-ranking