Understanding the role of conceptual relations in Word Sense Disambiguation Presenter: Tsai TzungRuei Authors: David Fernandez-Amoros, Ruben Heradio 國立雲林科技大學 National Yunlin University of Science and Technology ESA 2011
Outline • Motivation • Objective • Methodology • Experiments • Conclusion • Comments
Motivation • In Spring is my favorite season.
Objective • To undertake an in-depth study (through anexhaustive evaluation) of the role that conceptual relations canplay with respect to accurate WSD.
Methodology • Agirre and Rigau (1996) form form sense1 sense3 words, word sense2
Methodology Agirreand Rigau (1996) We look up the sensesof all the wordforms in the window, for each sense of each word we take a number of concepts associated by relation R and weight them according to a formula. Window= 5
Experiments • Performance over nouns • Type of conceptual relation
Experiments • Conceptual density formula • Agirreand Rigau (1996) • The LF (logarithmic formula) formula
Experiments • Behavior over different text categories • Weighting schemes
Experiments • Evaluation over SENSEVAL collections
Conclusion • The performance of conceptual relations is relatively lowin terms of recall, indicating that this relations should be combined with other types of information.
Comments • Advantage • References and experiments are complete and rich. • Drawback • Some mistakes • Application • Word Sense Disambiguation