es.uam.eps.ir.ranksys.diversity.intentaware

Class FeatureIntentModel<U,I,F>

java.lang.Object

es.uam.eps.ir.ranksys.core.model.UserModel<U>

es.uam.eps.ir.ranksys.diversity.intentaware.IntentModel<U,I,F>

es.uam.eps.ir.ranksys.diversity.intentaware.FeatureIntentModel<U,I,F>

Type Parameters:

U - type of the users

I - type of the items

F - type of the features

public class FeatureIntentModel<U,I,F>
extends IntentModel<U,I,F>

Default feature-based intent-aware model. Features of the items in the user profiles are used as proxies for intents, and the probability of each is proportional to its occurrence in the profiles.

Author:

Saúl Vargas (saul.vargas@uam.es), Pablo Castells (pablo.castells@uam.es)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	FeatureIntentModel.FeatureUserIntentModel Default user intent-aware model for FeatureIntentModel.

Nested classes/interfaces inherited from class es.uam.eps.ir.ranksys.diversity.intentaware.IntentModel

IntentModel.UserIntentModel<U,I,F>

Nested classes/interfaces inherited from class es.uam.eps.ir.ranksys.core.model.UserModel

UserModel.Model<U>

Field Summary

Fields

Modifier and Type	Field and Description
protected FeatureData<I,F,?>	featureData item features data
protected it.unimi.dsi.fastutil.objects.Object2DoubleOpenHashMap<F>	featureNorms features norms
protected PreferenceData<U,I>	totalData user-item preference data

Constructor Summary

Constructors

Constructor and Description
FeatureIntentModel(PreferenceData<U,I> totalData, FeatureData<I,F,?> featureData) Constructor that does not cache user intent-aware models.
FeatureIntentModel(Stream<U> targetUsers, PreferenceData<U,I> totalData, FeatureData<I,F,?> featureData) Constructor that caches user intent-aware models.

Method Summary

Modifier and Type	Method and Description
protected IntentModel.UserIntentModel<U,I,F>	get(U user) Calculates the user model for user u.

Methods inherited from class es.uam.eps.ir.ranksys.diversity.intentaware.IntentModel

getModel

Methods inherited from class es.uam.eps.ir.ranksys.core.model.UserModel

initialize

Methods inherited from class java.lang.Object

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

Field Detail

totalData

protected final PreferenceData<U,I> totalData

user-item preference data

featureData

protected final FeatureData<I,F,?> featureData

item features data

featureNorms

protected it.unimi.dsi.fastutil.objects.Object2DoubleOpenHashMap<F> featureNorms

features norms

Constructor Detail

FeatureIntentModel

public FeatureIntentModel(Stream<U> targetUsers,
                          PreferenceData<U,I> totalData,
                          FeatureData<I,F,?> featureData)

Constructor that caches user intent-aware models.

Parameters:

targetUsers - user whose intent-aware models are cached

totalData - preference data

featureData - feature data

FeatureIntentModel

public FeatureIntentModel(PreferenceData<U,I> totalData,
                          FeatureData<I,F,?> featureData)

Constructor that does not cache user intent-aware models.

Parameters:

totalData - preference data

featureData - feature data

Method Detail

get

protected IntentModel.UserIntentModel<U,I,F> get(U user)

Calculates the user model for user u.

Specified by:

get in class IntentModel<U,I,F>

Parameters:

user - target user

Returns:

intent model for user