Uses of Class
org.terrier.matching.models.queryexpansion.QueryExpansionModel

Packages that use QueryExpansionModel

Package	Description
org.terrier.matching.models.queryexpansion	Provides the classes that implement various query expansion models.
org.terrier.querying	Provides the interfaces and classes for the querying API of the Terrier platform, the controls, post processors and filters.

Uses of QueryExpansionModel in org.terrier.matching.models.queryexpansion

Subclasses of QueryExpansionModel in org.terrier.matching.models.queryexpansion

Modifier and Type	Class	Description
class	BA	This class implements an approximation of the binomial distribution through the Kullback-Leibler divergence to weight query terms for query expansion.
class	Bo1	This class implements the Bo1 model for query expansion.
class	Bo2	This class implements the Bo2 model for query expansion.
class	Information	This class implements the Kullback-Leibler divergence for query expansion.
class	KL	This class implements the Kullback-Leibler divergence for query expansion.
class	KLComplete	This class implements the complete Kullback-Leibler divergence for query expansion.
class	KLCorrect	This class implements the correct Kullback-Leibler divergence for query expansion, which takes the contribution into consideration.

Methods in org.terrier.matching.models.queryexpansion that return QueryExpansionModel

Modifier and Type	Method	Description
static QueryExpansionModel	QueryExpansionModelFactory.newInstance(java.lang.String name)	Returns the requested weighting model.

Uses of QueryExpansionModel in org.terrier.querying

Fields in org.terrier.querying declared as QueryExpansionModel

Modifier and Type	Field	Description
protected QueryExpansionModel	ExpansionTerms.model
protected QueryExpansionModel	QueryExpansion.QEModel	The query expansion model used.

Fields in org.terrier.querying with type parameters of type QueryExpansionModel

Modifier and Type	Field	Description
protected java.util.Map<java.lang.String,QueryExpansionModel>	QueryExpansion.Cache_QueryExpansionModel	Caching the query expansion models that have been created so far.

Methods in org.terrier.querying that return QueryExpansionModel

Modifier and Type	Method	Description
QueryExpansionModel	QueryExpansion.getQueryExpansionModel(java.lang.String Name)	Obtain the query expansion model for QE to use.

Methods in org.terrier.querying with parameters of type QueryExpansionModel

Modifier and Type	Method	Description
void	DFRBagExpansionTerms.assignWeights(QueryExpansionModel QEModel)	Assign weight to terms that are stored in ExpansionTerm[] terms.
protected SingleTermQuery[]	DFRBagExpansionTerms.getExpandedTerms(int numberOfExpandedTerms, QueryExpansionModel QEModel)
double	DFRBagExpansionTerms.getExpansionWeight(int termId, QueryExpansionModel model)	Returns the weight of a term with the given term identifier, computed by the specified query expansion model.
double	DFRBagExpansionTerms.getExpansionWeight(java.lang.String term, QueryExpansionModel model)	Returns the weight of a given term, computed by the specified query expansion model.
void	ExpansionTerms.setModel(QueryExpansionModel m)	Set query expansion model
void	QueryExpansion.setQueryExpansionModel(QueryExpansionModel _QEModel)	Set the used query expansion model.