Languages A language is a set of strings String: A sequence of letters Examples: âcatâ, âdogâ, âhouseâ, ⦠Defined over an alphabet: Alphabets and Strings We will…

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Costas Busch - LSU * Languages Costas Busch - LSU Costas Busch - LSU * Language: a set of strings String: a sequence of symbols from some alphabet Example: Strings: cat,…

Regular Expressions and Automata CPE 641 Natural Language Processing from Kathy McCoy’s slides, CISC 882 Introduction to NLP http://www.cis.udel.edu/~mccoy/courses/cisc882.03f/…

* Regular Expressions and Automata August 30 2012 Lecture #2 * Rule-based vs Statistical Approaches Rule-based = linguistic Statistical – “learn” from a large corpus…

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Formal Languages Models of Computation Computation CPU memory CPU input memory output memory Program memory temporary memory CPU input memory output memory Program memory…

Formal Languages Models of Computation Computation CPU memory CPU input memory output memory Program memory temporary memory CPU input memory output memory Program memory…