Class BasicModelBE

Limiting form of the Bose-Einstein model. The formula used in Lucene differs slightly from the one in the original paper: F is increased by tfn+1 and N is increased by F

Note

This API is experimental and might change in incompatible ways in the next release.

NOTE: in some corner cases this model may give poor performance with Normalizations that return large values for tfn such as NormalizationH3. Consider using the geometric approximation (BasicModelG) instead, which provides the same relevance but with less practical problems.

Inheritance

object

BasicModel

BasicModelBE

Inherited Members

BasicModel.Explain(BasicStats, float)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Namespace: Lucene.Net.Search.Similarities

Assembly: Lucene.Net.dll

Syntax

public class BasicModelBE : BasicModel

Constructors

BasicModelBE()

Sole constructor: parameter-free

Declaration

public BasicModelBE()

Methods

Score(BasicStats, float)

Returns the informative content score.

Declaration

public override sealed float Score(BasicStats stats, float tfn)

Parameters

Type	Name	Description
BasicStats	stats
float	tfn

Returns

Type	Description
float

Overrides

BasicModel.Score(BasicStats, float)

ToString()

Subclasses must override this method to return the code of the basic model formula. Refer to the original paper for the list.

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

BasicModel.ToString()