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Machine Learning for Language Technology 
Lecture 7: Hidden Markov Models (HMMs) 
Marina Santini 
Department of Linguistics and Philology 
Uppsala University, Uppsala, Sweden 
Autumn 2014 
Acknowledgement: Thanks to Prof. Joakim Nivre for course design and materials
Hidden Markov Models (1)
Hidden Markov Models (2)
A Simple HMM
Markov Assumptions
Observation Sequences
Problems for HMMs (1)
Problems for HMMs (2)
Viterbi
Forward Algo & Backward Algo
Forward-Backward Algo
Part-Of-Speech Tagging
Modeling (1)
Modeling (2)
Learning
Smoothing
Inference
HMM Applications
The end

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Lecture 7: Hidden Markov Models (HMMs)