1 / 5

Unit #1 Summary

Unit #1 Summary. LING 570 Fei Xia Week 4: 10/17/07. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A. Recap: formal grammars and languages. Formal language and formal grammar Chomsky hierarchy Other grammars and languages

makya
Télécharger la présentation

Unit #1 Summary

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Unit #1 Summary LING 570 Fei Xia Week 4: 10/17/07 TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: AAA

  2. Recap: formal grammars and languages • Formal language and formal grammar • Chomsky hierarchy • Other grammars and languages • The following are equivalent: • Regular language • Regular grammar • Regular expression • FSA (DFA and NFA)

  3. Recap: FSA • FSA and Extension of FSA • Probabilistic and weighted FSA • FST and weighted FST • Packages: AT&T, Carmel, NLTK • Applications of FSA / FST: • Morphological analyzer • ASR • …

  4. Recap: morphological analysis • Three components: • Lexicon: book is a “regular” noun • Morphotactic rules: PL follows nouns • Orthographic rules: e-insertion, e-deletion

  5. An example • Task: foxes  fox +N +PL • Surface: foxes • Intermediate: fox s • Lexical: fox +N +pl Orthographic rules Lexicon + morphotactics

More Related