edu.cmu.minorthird.ui
Class Recommended.VPHMMLearner

java.lang.Object
  edu.cmu.minorthird.text.learn.AnnotatorLearner
      edu.cmu.minorthird.text.learn.AbstractBatchAnnotatorLearner
          edu.cmu.minorthird.text.learn.SequenceAnnotatorLearner
              edu.cmu.minorthird.ui.Recommended.VPHMMLearner

Enclosing class:

Recommended

public static class Recommended.VPHMMLearner
extends SequenceAnnotatorLearner

Uses the voted perceptron algorithm to learn a parameters of a hidden Markov model (HMM). This method is similar to a CRF, but often less expensive to train.

This iterates over the data only 5 times. Subsequent experiments suggest that iterating 20, 50, or 100 times often gives better performance.

Reference: Michael Collins, Discriminative Training Methods for Hidden Markov Models: Theory and Experiments with Perceptron Algorithms, Empirical Methods in Natural Language Processing (EMNLP), 2002.

Nested Class Summary

Nested classes/interfaces inherited from class edu.cmu.minorthird.text.learn.SequenceAnnotatorLearner

SequenceAnnotatorLearner.SequenceAnnotator

Field Summary

Fields inherited from class edu.cmu.minorthird.text.learn.SequenceAnnotatorLearner

seqLearner

Fields inherited from class edu.cmu.minorthird.text.learn.AbstractBatchAnnotatorLearner

annotationType, fe, reduction, seqData

Constructor Summary

Recommended.VPHMMLearner()

Method Summary

Methods inherited from class edu.cmu.minorthird.text.learn.SequenceAnnotatorLearner

getAnnotator, getDisplayDatasetBeforeLearning, getDisplayDatasetBeforeLearningHelp, getSequenceClassifierLearner, getSequenceClassifierLearnerHelp, main, prepareSequenceData, setDisplayDatasetBeforeLearning, setSequenceClassifierLearner

Methods inherited from class edu.cmu.minorthird.text.learn.AbstractBatchAnnotatorLearner

getAnnotationType, getSequenceDataset, getSpanFeatureExtractor, getTaggingReduction, getTaggingReductionHelp, hasNextQuery, nextQuery, reset, setAnnotationType, setAnswer, setDocumentPool, setSpanFeatureExtractor, setTaggingReduction

Methods inherited from class edu.cmu.minorthird.text.learn.AnnotatorLearner

getAnnotationTypeHelp, getSpanFeatureExtractorHelp

Methods inherited from class java.lang.Object

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

Constructor Detail

Recommended.VPHMMLearner

public Recommended.VPHMMLearner()