HMM算法，隐马尔可夫算法

Thischapterisroughlydividedintotwosections:HiddenMarkovModelsfollowedbyMaximumEntropyMarkovModels.OurdiscussionoftheHiddenMarkovModelextendswhatwesaidaboutHMMpart-of-speechtagging.WebegininthenextsectionbyintroducingtheMarkovChain,thengiveadetailedoverviewofHMMsandtheforwardandVi