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Unsupervised Word Alignment with Arbitrary Features #aclreading
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Unsupervised Word Alignment with Arbitrary Features #aclreading

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ACL2011読み会の資料です.

ACL2011読み会の資料です.

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  • 1. Unsupervised  Word  Alignment  with   Arbitrary  Features Authors:  Chris  Dyer  et  al.   Carnegie  Mellon  University   Presenter:  @nokuno   #acl2011reading
  • 2.  
  • 3. •   •   •   
  • 4. 1.   2.   3.   4.   5.   6. 
  • 5. •   •   ×     s:     t:  On  the  day  of  the  game  ,  he  will  watch  it  with  me.  
  • 6. •   •  a:    j→i    :  t_j s_i
  • 7. •  [Brown+  93],  [Vogel+  96],  [Kirkpatrick+  10]   –  IBM   –   •  [Moor+  05],  [Taskar+  05],  [Blunsum+  06]   –    – 
  • 8. •  n   •   
  • 9. •  θ H Z  
  • 10. •   •  C  •  h  •    1
  • 11. •      L1 •  1 2 (1)
  • 12. (1) •  1 2 1 2
  • 13. (1)  1.  (t_i,  a_i) 1 Forward-­‐Backward  2.  2 t 1  3.  t s   WFSA (?)
  • 14. 1 Forward  Backward 2 •  s   a_i s[a_i] •  t this  is  a  pen this,   this,   this,   this,   this,   this,   Start End is,   a,  NULL pen,   pen,   pen,   pen,   pen,   pen,  
  • 15. 2 1 •  s   a_i s[a_i] •  t this  is  a  pen      ← this,   is,   a,   pen,   Start this,   End is,   a,  NULL pen,   pen,  
  • 16. 3 •  s   IBM 1 •  t this  is  a  pen this,   this,   this,   this,   is,   is,   Start End a,  NULL pen,   pen,   pen,   pen,  
  • 17. A.   B.   C.   D.   E.      2  
  • 18. A.   •   •    –    –    –   •    –    –  IBM  •    – 
  • 19. B.   •   •  h   –    –       
  • 20. C.   •   •  l n  •  l                  •  l                      
  • 21. D.   •    –    –   •   •   •   
  • 22. E.   •    –    – 
  • 23. •    –  -­‐ 0.8M  Words   –  -­‐ 3.1M  Words   –  -­‐ 2M  Words  •    –  Giza++ Model  4   –  Both  Model  4   –  3-­‐gram  (50M     –  cdec  [Dyer+  10]  
  • 24. •   • 

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