'Kleene star' diaporamas de présentation

Parsing with Boost.Spirit

Parsing with Boost.Spirit. Rob Stewart robert.stewart@sig.com. Overview. Introduction to Boost.Spirit Parsing with Qi Parsing ping command output Problems using Qi. Introduction to Boost.Spirit. Introduction to Boost.Spirit. Three sub-libraries Lex : Lexical analysis Qi: Parsing

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Normal forms for Context-Free Grammars

Normal forms for Context-Free Grammars. Context-Free Grammar. In linguistics and computer science, a context-free grammar (CFG) is a formal grammar in which every production rule is of the form V ? w

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CS322

Week 13 - Wednesday. CS322. Last time. What did we talk about last time? Exam 3 Before review: Graphing functions Rules for manipulating asymptotic bounds Computing bounds for running time functions. Questions?. Logical warmup. Ten people are marooned on a deserted island

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NFAs and DFAs

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Let L= { w= u v : u ? {a, b}*, v ? {c, d}* and |u|= |v|} Design a context-free grammar that generates L.

Let L= { w= u v : u ? {a, b}*, v ? {c, d}* and |u|= |v|} Design a context-free grammar that generates L. Use your grammar and the construction from last class to design a PDA that accepts L. No class or tutorial on Tuesday July 3: reading break is July 2-3 for May to August classes.

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Kleene Star Closure

Kleene Star Closure. Given ?, then the Kleene Star Closure of the alphabet ? , denoted by ? * , is the collection of all strings defined over ? , including ? . It is to be noted that Kleene Star Closure can be defined over any set of strings. Examples. If ? = {x}

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Background Information for the Pumping Lemma for Context-Free Languages

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Closure Properties for Regular Languages

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Closure Properties for Regular Languages

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Background Information for the Pumping Lemma for Context-Free Languages

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Regular Expression -> NFA with an input string

Regular Expression -> NFA with an input string . Brian K. Strickland. ? -NFA for Regular Expression ( aab )*(a + aba )*. a. 1. 2. a. a. b. ?. 0. 3. a. a. 4. 5. b. Computation Tree for Input String: aababa. ?. a. a. 0. 0. a. 1. 1. 4. 5. 4. 4. 2. 5. a. a. a. b.

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Language Model Grammar Conversion

Language Model Grammar Conversion. XML. ABNF. IHD. BNF. JSGF. BNF. Wesley Holland, Julie Baca, Dhruva Duncan, Joseph Picone Center for Advanced Vehicular Systems Mississippi State University. Speech Recognition. Acoustic Model Maps audio data to words or phonemes Language Model

284 views • 11 slides

CS310

CS310. Converting NFA to DFA Sections:1.2 Page 54 September 15, 2006. Quick Review. 5 tuple ( Q, ? , ? , q 0 ,F) ? ? = ? U { ? } ? : Q x ? ? -> P (Q) Every NFA has an equivalent DFA (Th 1.39) We can convert from NFA to DFA NFAs are often easier to build

294 views • 11 slides

NFA Closure Properties

NFA Closure Properties. NFAs also have closure properties. We have given constructions for showing that DFAs are closed under Complement Intersection Difference Union We will now establish that NFAs are closed under Reversal Kleene star Concatenation. Reversal of L -NFAs.

234 views • 7 slides