ACL2011読み会 Exploiting Web-Derived Selectional Preference to Improve Statistical Dependency Parsing

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ACL2011読み会 Exploiting Web-Derived Selectional Preference to Improve Statistical Dependency Parsing

  1. 1. ACL2011 EXPLOITING WEB-DERIVED SELECTIONAL PREFERENCE TO IMPROVE STATISTICAL DEPENDENCY PARSING (1156) GUANGYOU ZHOU, JUN ZHAO, KANG LIU, AND LI CAI 2011/09/03 Yuya Unno (@unnonouno)2011 9 3
  2. 2. • (selectional preference) web • Higher-order Eisner N PMI • :-)2011 9 3
  3. 3. • • •2011 9 3
  4. 4. • • … • • http://d.hatena.ne.jp/usata3/20070416/p22011 9 3
  5. 5. • • • Web2011 9 3
  6. 6. PMI • (Point-wise Mutual Information) • • PMI(x, y) = log (P(x, y) / P(x)P(y)) • •2011 9 3
  7. 7. • Google V1 • Web • Google API •2011 9 3
  8. 8. • • PMI(x, y, z) = log ( P(x, y, z) / P(x, y)P(y, z) ) • x, y y, z PMI2011 9 3
  9. 9. PP-ATACHEMENT • • PMIIN(x, z) = P(x, IN, z) / P(x) • PMI • 32011 9 3
  10. 10. EISNER LOG- LINEAR ρ → • Eisner • • CKY • • http://www.slideshare.net/unnonouno/ss-5724050 • PMI (PMI - μ) / σ2011 9 3
  11. 11. • dep1: 1 Eisner, dep2: 2 Eisner, +hits: Google API, +V1: Google V1 Corpus • • Google API2011 9 3
  12. 12. • •2011 9 3
  13. 13. • Gigword (NEWS) • Unigram •2011 9 3
  14. 14. •2011 9 3
  15. 15. WEB NGRAM • • Bio •2011 9 3
  16. 16. • • •2011 9 3
  17. 17. • Web • PMI • •2011 9 3

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