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lecture 7: hidden markov models (hmms)

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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

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Outline: Hidden Markov Models (HMMs), Markov Assumptions, Problems for HMMs, Algorithms for HMMs, POS Tagging with HMMs, Smoothing for POS Tagging

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Page 1: Lecture 7: Hidden Markov Models (HMMs)

Machine Learning for Language Technology Lecture 7: Hidden Markov Models (HMMs)

Marina SantiniDepartment of Linguistics and Philology

Uppsala University, Uppsala, Sweden

Autumn 2014

Acknowledgement: Thanks to Prof. Joakim Nivre for course design and materials

Page 2: Lecture 7: Hidden Markov Models (HMMs)

Hidden Markov Models (1)

Page 3: Lecture 7: Hidden Markov Models (HMMs)

Hidden Markov Models (2)

Page 4: Lecture 7: Hidden Markov Models (HMMs)

A Simple HMM

Page 5: Lecture 7: Hidden Markov Models (HMMs)

Markov Assumptions

Page 6: Lecture 7: Hidden Markov Models (HMMs)

Observation Sequences

Page 7: Lecture 7: Hidden Markov Models (HMMs)

Problems for HMMs (1)

Page 8: Lecture 7: Hidden Markov Models (HMMs)

Problems for HMMs (2)

Page 9: Lecture 7: Hidden Markov Models (HMMs)

Viterbi

Page 10: Lecture 7: Hidden Markov Models (HMMs)

Forward Algo & Backward Algo

Page 11: Lecture 7: Hidden Markov Models (HMMs)

Forward-Backward Algo

Page 12: Lecture 7: Hidden Markov Models (HMMs)

Part-Of-Speech Tagging

Page 13: Lecture 7: Hidden Markov Models (HMMs)

Modeling (1)

Page 14: Lecture 7: Hidden Markov Models (HMMs)

Modeling (2)

Page 15: Lecture 7: Hidden Markov Models (HMMs)

Learning

Page 16: Lecture 7: Hidden Markov Models (HMMs)

Smoothing

Page 17: Lecture 7: Hidden Markov Models (HMMs)

Inference

Page 18: Lecture 7: Hidden Markov Models (HMMs)

HMM Applications

Page 19: Lecture 7: Hidden Markov Models (HMMs)
Page 20: Lecture 7: Hidden Markov Models (HMMs)

The end


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