[工程科技]Disambiguation The State of the Art_.pdfVIP

Mainly modified from : Rada M. and Ted P. Advances in Word Sense Disambiguation (Presentation) Tutorial at AAAI2005, Tutorial at ACL2005. Presenter: Ithipan Methasate Word Sense Disambiguation: Basics Advances References Nancy I., Jean V. Word Sense Disambiguation: The State of the Art, Computational Linguistics (24) pp 1-40. Rada M. and Ted P. Advances in Word Sense Disambiguation (Presentation), Tutorial at AAAI2005, Tutorial at ACL2005. Outline of the presentation Introduction Methodology Knowledge Intensive Methods Supervised Approaches Unsupervised Learning Conclusion Problems Polysemy – most words have many possible meanings. Example: some meanings of word “chair” - Noun a seat ,esp. for one person ,usually having four legs for support and a rest for the back and often having rests for the arms. something that serves as a chair or supports like a chair: The two men clasped hands to make a chair for their injured companion. a position of authority, as of a judge, professor, etc. the person occupying a seat of office, esp. the chairperson of a meeting: The speaker addressed the chair. (in an orchestra) the position of a player ,assigned by rank; desk: first clarinet chair. (in reinforced-concrete construction) a device for maintaining the position of reinforcing rods or strands during the pouring operation. –Verb (used with object) to place or seat in a chair. to install in office. (totally 18 meanings from ): Ambiguity for a Computer The fisherman jumped off the bank and into the water. The bank down the street was robbed! Back in the day, we had an entire bank of computers devoted to this problem. The bank in that road is entirely too steep and is really dangerous. The plane took a bank to