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Deep Learning for News Recommendation

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2016年3月20日にYahoo! JAPANで開催された「Deep Learning Tokyo 2016」におけるYahoo! JAPAN 大倉によるYahoo!のトップページにおけるニュース記事のレコメンデーションでDeep Learningを活用した事例に関する発表資料となります。

Published in: Science
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Deep Learning for News Recommendation

  1. 1. 9RR  ARN V T  S CRd  FRP ZZR NaV RR  YRN V T  b R  PN R  V  LN !  ?6E6C   ,   aa 4))ddd(fN (P (W ) 3JJT   JFURNRL  ASO S   (). G bZ RV  DXb N LN  ?N N  8 NaV
  2. 2. 5USRW  TFLJ  SK  EFMSS!   0 0  KSU   FUWTMSRJ 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt , JUVSRFPN JI   SI PJ IN V b  N aVPYR   RYRPaR  Of  a R   f aRZ  S  RNP  b R  N R   V YNfR ( H Nf    dVYY  aNYX  NO ba  a R   f aRZ   S  a V  Z bYR( ASTNHV   SI PJ H  0  P ZZ  N aVPYR   RYRPaR  Of   bZN  Re R a  N R   V YNfR (
  3. 3. YJUYNJ  SK  WMJ   VWJ 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt -‐‑‒ 1US VNRLc MNVWSUNJV BVJU   KJFW UJV JFUHM   4RLNRJ SVWJI   FUWNHPJV FLJ  YNJ   JVWN FWSU H Nf  dR  V a bPR  OJ  TFUWV   S  a V (
  4. 4. )  2UJFWJ  0UWNHPJ  ?JTUJVJRWFWNSR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt . 1US VNRLc MNVWSUNJV BVJU   KJFW UJV JFUHM   4RLNRJ SVWJI   FUWNHPJV FLJ  YNJ   JVWN FWSU
  5. 5. JR  ON VPNYYf  b R   R V V T  Nba 'R P R ( 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt / 3J&RSNVNRL  0 WS&4RHSIJU 7NT   S  d  cRPa  S  N  N aVPYR 2SUU TW 4RHSIJ 3JHSIJ x ˜x h y h = (W ˜x + b) y = (W0 h + b0 ) ✓ = arg min X L (y, x)
  6. 6. JR  ON VPNYYf  b R   R V V T  Nba 'R P R ( 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 0 3J&RSNVNRL  0 WS&4RHSIJU 7NT   S  d  cRPa  S  N  N aVPYR 2SUU TW 4RHSIJ 3JHSIJ x ˜x h y H V  V  N  T  SRNab R   S a R  N aVPYR(   dRcR  a R R     A   RPR N VYf  P a bPa  N LSSI  NRRJU  TUSI HW  VTFHJ( h = (W ˜x + b) y = (W0 h + b0 ) ✓ = arg min X L (y, x)
  7. 7. 1US VNRLc MNVWSUNJV BVJU   KJFW UJV FLJ  YNJ   JVWN FWSU DM  KSH V  SR  WMJ  NRRJU  TUSI HW 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 1 JFUHM   4RLNRJ SVWJI   FUWNHPJV a  V   RPR N f  a   R NWMNR   -‐‑‒   V  S Z  N   R bR a( H R RS R  dR  PN  CDH  b R   P Z YRe  PYN VgR (
  8. 8. 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 2 AUFNRNRL   NWM  AUNTPJW  SK  0UWNHPJV > 1FVJ  FUWNHPJ 0R  FUWNHPJ  NR   VN NPFU  HFWJLSUNJV 0R  FUWNHPJ  NR RSR&VN NPFU  HFWJLSUNJV h0h1 h2 hT 0 h1 hT 0 h2   RRJU  TUSI HW  TJRFPW?J&HSRVWU HWNSR  PSVV ✓ = arg min X (x0,x1,x2) 2X n=0 L(yn, xn) ↵ log hT 0 h1 hT 0 h2 l   a  PN  P a bPa  ORaaR  NRRJU  TUSI HW  VTFHJ(
  9. 9.  2UJFWJ  BVJU  ?JTUJVJRWFWNSR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 3 1US VNRLc MNVWSUNJV BVJU   KJFW UJV JFUHM   4RLNRJ SVWJI   FUWNHPJV FLJ  YNJ   JVWN FWSU
  10. 10. JR  R P R  O d V T   V a f  a  b R  cRPa Of   RPb R a   Rb NY   Rad X ( 4RHSINRL     SRL& MSW  AJU   J SU 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 1US VNRL  6NVWSU AGHB AGHB AGHB AGHBk k FVW 2 UUJRW BVJU  CJHWSU
  11. 11. CRd  6 CRd  7 CRd  8 4RHSINRL     SRL& MSW  AJU   J SU 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt AGHB AGHB AGHB AGHBk k 8YVPX!! 1US VNRL  6NVWSUFVW 2 UUJRW BVJU  CJHWSU
  12. 12. CRd  6 CRd  7 CRd  8 4RHSINRL     SRL& MSW  AJU   J SU 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt , AGHB AGHB AGHB AGHBk k 1US VNRL  6NVWSUFVW 2 UUJRW H NV V T  dVa  PYVPX  SRR ONPX  Of  7EHH( BVJU  CJHWSU
  13. 13. +   JFUHM    3J&I TPNHFWNSR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt -‐‑‒ 1US VNRLc MNVWSUNJV BVJU   KJFW UJV JFUHM   4RLNRJ SVWJI   FUWNHPJV FLJ  YNJ   JVWN FWSU
  14. 14. +   JFUHM    3J&I TPNHFWNSR •  JR   NcR  NY RN f  P a bPaR  N aVPYR  cRPa   N  a R  b R  cRPa ( •  Db   RZNV V T  aN X  V   Yf  a   V YNf     RN R a  N aVPYR  S Z  a R  b R  cRPa   V #a  Va5 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt .
  15. 15. +   JFUHM    3J&I TPNHFWNSR •  JR   NcR  NY RN f  P a bPaR  N aVPYR  cRPa   N  a R  b R  cRPa ( •  Db   RZNV V T  aN X  V   Yf  a   V YNf     RN R a  N aVPYR  S Z  a R  b R  cRPa   V #a  Va5 CD! 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt /
  16. 16. FbYJ   TPJ JRWFWNSR   1FI  4 F TPJ 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 0  YVXR   PPR ( FRPR a  TNZR   S   Zf  SNc VaR   aRNZ  V   NZR  6(
  17. 17. FbYJ   TPJ JRWFWNSR   1FI  4 F TPJ 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 1 ?JHS JRIJI  KSU   S ccc NZR  6   R bYa KK  HVZR ccc NZR  6   R bYa LL  G a ccc NZR  6   R bYa MM  ? b NY ccc NZR  6   R bYa JJ  G PPR k  YVXR   PPR ( FRPR a  TNZR   S   Zf  SNc VaR   aRNZ  V   NZR  6( 6 aVPYR   S  NYZ a   NZR  P aR a dVa   VhR R a   cV R xsjnop
  18. 18. 3J&I TPNHFWNSR   NWM  0UWNHPJ  CJHWSUV 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 2 ?JHS JRIJI  KSU   S ccc NZR  6   R bYa KK  HVZR ccc NZR  6   R bYa LL  G a ccc NZR  6   R bYa MM  ? b NY ccc NZR  6   R bYa JJ  G PPR k ASS  VN NPFU  a  a R   RcV b   R m ?J SYJ  S Z  a R   RP ZZR R  YV a 6 aVPYR  cRPa xsjnop
  19. 19. 0KWJU  3J&I TPNHFWNSR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt 3 ?JHS JRIJI  KSU   S ccc NZR  6   R bYa KK  HVZR cccEYNfR  V aR cVRd LL  G a ccc NZR  7   R bYa MM  ? b NY ccc NZR  8   R bYa JJ  G PPR k CFUNS V  UJV PWV  YVXR   PPR ( FRPR a  TNZR   S   Zf  SNc VaR   aRNZ  V   NZR  6( xsjnop
  20. 20. 0KWJU  3J&I TPNHFWNSR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt , ?JHS JRIJI  KSU   S ccc NZR  6   R bYa KK  HVZR cccEYNfR  V aR cVRd LL  G a ccc NZR  7   R bYa MM  ? b NY ccc NZR  8   R bYa JJ  G PPR k CFUNS V  UJV PWV  YVXR   PPR ( FRPR a  TNZR   S   Zf  SNc VaR   aRNZ  V   NZR  6( xsjnop •  AMNV  FTTUSFHM   FV  F FUIJI  WS  WMJ  ES RL   HNJRWNVW  0 FUI  NR     ). •  DJ   NPP  INVH VV  F S W  NW  NR  WMJ  TSVWJU   VJVVNSR  SK  DDD   ).  FW  0TUNP   WS  FTTJFU
  21. 21.   FLJ  CNJ  4VWN FWNSR  KSU  ?J&UFRONRL   8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt , 1US VNRLc MNVWSUNJV BVJU   KJFW UJV JFUHM   4RLNRJ SVWJI   FUWNHPJV FLJ  YNJ   JVWN FWSU
  22. 22. DMFW  FUWNHPJV  VMS PI   J  TUSYNIJI  WS   VJUV 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,, 7R  V aR R a  a  ZR JN a  a   RN JR  PN   VPX  b  a R R Of  b R  cRPa (
  23. 23. DMFW  FUWNHPJV  VMS PI   J  TUSYNIJI  WS   VJUV 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,-‐‑‒ 7R  V aR R a  a  ZR JN a  a   RN NcR  a   RN 7R  RN  a  RcRfR H R R  N aVPYR  N R NY  VZ aN a(
  24. 24. 6S  IS   J   RI  V HM  FUWNHPJV •  6TT RTNaR  S Z  a R   V a f  Y T5 l  H  YNaR(         R  N aVPYR  N R  cR f  VZ aN a          Oba  a Rf   NcR     V a VR ( •  : aVZNaR  S Z   aNaVP  SRNab R   S  N aVPYR 5 l  E VOYR  Oba  YR  NPPb NaR( l  8 ZOV NaV   S  NTT RTNaV  N  R aVZNaV ( 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,.
  25. 25. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,/ VaVNY GaNaVP  SRNab R
  26. 26. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,0 VaVNY GaNaVP  SRNab R FCC 8 9f NZVP  SRNab R : aVZNaV  S   a   b
  27. 27. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,1 VaVNY GaNaVP  SRNab R FCC 8 : aVZNaV  S   ,   b FCC 8 9f NZVP  SRNab R
  28. 28. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,2 VaVNY GaNaVP  SRNab R FCC 8 FCC 8 FCC 86TT RTNaV   SRR ONPX : aVZNaV   S  -‐‑‒   b 9f NZVP  SRNab R
  29. 29. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt ,3 VaVNY GaNaVP  SRNab R FCC 8 FCC 8 FCC 8 FCC 8 9f NZVP  SRNab R 6TT RTNaV   SRR ONPX
  30. 30. 4VWN FWNSR   VNRL  ?JH UUJRW   J UFP   JW SUO 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt -‐‑‒ VaVNY GaNaVP  SRNab R FCC 8 FCC 8 FCC 8 FCC 8 9f NZVP  SRNab R 4E   A! FCC   N  N  N cN aNTR  a  OR  NOYR  a  aNXR YFUNF PJ  R JU  SK  WMJ  FLLUJLFWNSR  KJJI FHOV V  a R   R VPaV ( C  SRR ONPX ,  SRR ONPX
  31. 31. 2 UUJRW   WFW V 0PUJFI  FTTPNJI •  9R' b YVPNaV  dVa  N aVPYR  cRPa •  FR' N XV T  b V T  VZ NPa  R aVZNa BRIJU  WJVWNRL •  BNaP V T  ON R    b R  cRPa 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt -‐‑‒ AVSa   bOYR!! 8HF e e e e e e e
  32. 32. ?J FNRNRL   US PJ V •  GR N NaV   S  V aR R a  N  R V RZVP •  8 aV b b  Z RY  b NaV T •  :ea NPaV   S  a R   a f  ORadRR  N aVPYR 8 f VT a   8  , 0  LN  ?N N  8 NaV (  6YY  FVT a  FR R cR (  vwrqiu yt -‐‑‒,

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