danbikel.parser.ms
Class BrokenLeftSubcatModelStructure

java.lang.Object
  danbikel.parser.ProbabilityStructure
      danbikel.parser.ms.SubcatModelStructure1
          danbikel.parser.ms.BrokenLeftSubcatModelStructure

All Implemented Interfaces:

Serializable

public class BrokenLeftSubcatModelStructure
extends SubcatModelStructure1

Provides the complete back-off structure of the subcat-generation model for the left side of the head child. This model structure is just like LeftSubcatModelStructure1 but is “broken” in that its lambdaFudge(int) method returns 5.0 for all back-off levels and its lambdaFudgeTerm(int) method returns 0.0 for all back-off levels, just as Collins had implemented for his thesis parser.

For the actual details of this model's back-off structure, please see SubcatModelStructure1.

See Also:

Serialized Form

Field Summary

Fields inherited from class danbikel.parser.ProbabilityStructure

additionalData, defaultModelClassName, defaultModelConstructor, doPruning, estimates, futureList, futures, futuresWithSubcats, histories, historiesWithSubcats, historyList, lambdas, prevHistCount, topLevelCacheSize, transitions

Constructor Summary

BrokenLeftSubcatModelStructure()
Constructs a new BrokenLeftSubcatModelStructure instance.

Method Summary

ProbabilityStructure	copy() Returns a copy of this object.
Event	getFuture(TrainerEvent trainerEvent, int backOffLevel) Gets the future being predicted conditioning on this subcat event.
double	lambdaFudge(int backOffLevel) Returns 5.0 regardless of the value of the argument.
double	lambdaFudgeTerm(int backOffLevel) Returns 0.0 regardless of the value of the argument.

Methods inherited from class danbikel.parser.ms.SubcatModelStructure1

getHistory, maxEventComponents, numLevels

Methods inherited from class danbikel.parser.ProbabilityStructure

cacheSize, defaultSmoothingParamsFilename, doCleanup, dontAddNewParameters, doPruning, getAdditionalData, getTopLevelCacheSize, getTransition, jointModel, lambdaPenalty, newModel, priorLevel, removeFuture, removeHistory, removeTransition, saveSmoothingParameters, setAdditionalData, smoothingParametersFile, useSmoothingParameters

Methods inherited from class java.lang.Object

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

Constructor Detail

BrokenLeftSubcatModelStructure

public BrokenLeftSubcatModelStructure()

Constructs a new BrokenLeftSubcatModelStructure instance.

Method Detail

lambdaFudge

public double lambdaFudge(int backOffLevel)

Returns 5.0 regardless of the value of the argument.

Overrides:

lambdaFudge in class SubcatModelStructure1

Parameters:

backOffLevel - the back-off level for which to return a "fudge factor"

lambdaFudgeTerm

public double lambdaFudgeTerm(int backOffLevel)

Returns 0.0 regardless of the value of the argument.

Overrides:

lambdaFudgeTerm in class SubcatModelStructure1

getFuture

public Event getFuture(TrainerEvent trainerEvent,
                       int backOffLevel)

Gets the future being predicted conditioning on this subcat event.

Specified by:

getFuture in class ProbabilityStructure

Parameters:

trainerEvent - the maximal-context event from which to get the future being predicted

backOffLevel - the back-off level whose estimate is being sought

Returns:

the future being predicted conditioning on the left subcat event contained in the speciified TrainerEvent instance

copy

public ProbabilityStructure copy()

Returns a copy of this object.

Specified by:

copy in class ProbabilityStructure