edu.cmu.minorthird.ui
Class Recommended.CRFAnnotatorLearner

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.CRFAnnotatorLearner

Enclosing class:

Recommended

public static class Recommended.CRFAnnotatorLearner
extends SequenceAnnotatorLearner

Implements the CRF algorithm. Based on the IIT CRF implementation, in which optimization is performed using the limited-memory BFGS technique of Liu and Nocedal (following Sha & Pereira's recommendation.)

References: John Lafferty and Andrew McCallum and Fernando Pereira, Conditional Random Fields: Probabilistic Models for Segmenting and Labeling Sequence Data Proc. 18th International Conf. on Machine Learning, 2001; F. Sha and F. Pereira, Shallow parsing with conditional random fields, Proceedings of HLT-NAACL, 2003.

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.CRFAnnotatorLearner()

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.CRFAnnotatorLearner

public Recommended.CRFAnnotatorLearner()