Cmpt 825: Natural Language Processing 12.0.1 Definitions
نویسنده
چکیده
Tagger Program that tags a word (w i) in a text with its part of speech (POS) tag t i. Precision Precision is the number of correct responses out of the total number of responses. Recall Recall is the number of correct responses out of the number correct in the key. Word Features Features of a word that are used in characterizing the type of entity it is (i.e. whether a word is capitalized, whether a word contains digits or special punctuation, whether all letters are capitalized, etc.).
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Cmpt 825: Natural Language Processing
1.1 Markov Processes Consider a set of states S1, S2, . . . SN . A discrete Markov process is one in which the system is in a particular state at any given time. The state can be changed only at discrete intervals of time. We denote the time instants associated with state changes with as t = 1, 2, . . . and we denote the actual state at time t as qt. The current state in an n-order Markov proce...
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