资源说明:This chapter is roughly divided into two sections: Hidden Markov Models followed
by Maximum Entropy Markov Models. Our discussion of the Hidden Markov
Model extends what we said about HMM part-of-speech tagging. We begin in the next
section by introducing the Markov Chain, then give a detailed overview of HMMs and
the forward and Viterbi algorithms with more formalization, and finally introduce the
important EM algorithm for unsupervised (or semi-supervised) learning of a Hidden
Markov model.
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