番外.李宏毅学习笔记.ST4.Sequence Labeling

文章目录Sequence LabelingDefinitionExample Task: POS taggingHidden Markov Model (HMM)HMM – Step 1HMM – Step 2HMM的数学表达HMM– Estimating the probabilitiesHMM – Viterbi AlgorithmHMM – SummaryConditional Random Field (CRF)P(x,y) for CRFFeature VectorCRF – Training CriterionCRF – InferenceCRF v.s. HMMCRF – Sum