Upgrade to Pro — share decks privately, control downloads, hide ads and more …

20191005_Recsys2019_Users_In_The_Loop.pdf

 20191005_Recsys2019_Users_In_The_Loop.pdf

Waku Michishita

October 05, 2019
Tweet

More Decks by Waku Michishita

Other Decks in Research

Transcript

  1. 'PSDFE$IPJDFͷར఺ͱܽ఺ • ར఺ • ई౓ͷղऍʹᐆດ͕͞ͳ͍ • Ϣʔβ͕Ͳ͜Ͱࣅ͍ͯΔʗࣅ͍ͯͳ͍ͷڥքઢΛҾ ͍ͨͷ͔ཧղ͠΍͍͢ • ܽ఺

    • ϢʔβʹΑͬͯڥքઢΛͻ͘5ISFTIPME͕ҟͳΔ • ࣮ࡍ͸ʮͲͪΒ΋બ͹ͳ͍ʯͱ͍͏બ୒͕͋Γ͏Δ ͨͩ͠ࠓճٻΊ͍ͯΔճ౴͸ʮͲͪΒ͕ൺֱతࣅ͍ͯΔ ͔ʯͳͷͰ͜ͷ໰୊͸Ұ୴ແࢹ͢Δ͜ͱͱ͍ͯ͠Δɻ
  2. 4JNJMBSJUZͷධՁ  ैདྷͷํ๏ Ϩίϝϯσʔγϣϯʹ͓͍ͯΑ͘༻͍ΒΕΔͷ ͸NFUSJDEJTUBODFGVODUJPOϕʔεͷ΋ͷ FY +BDDBSE 4JNJMBSJUZ " ,

    = | ∩ | | ∪ | • ه߸ͷఆٛ͸ͦΕͧΕҎԼͷ௨Γ , +BDDBSE܎਺ʹجͮ͘ྨࣅ౓ , ྨࣅ౓Λௐ΂ΔΞΠςϜ , ֤ΞΠςϜͷಛ௃ྔ
  3. 4JNJMBSJUZͷධՁ  ఏҊ͞Εͨํ๏ • 5WFSTLZNPEFM • ಛ௃ྔ͝ͱͷॏཁ౓Λߟྀͨ͠ྨࣅ౓ ҎԼͷΑ͏ʹఆࣜԽ͞ΕΔ - ,

    = ∩ − − − ( − ) • ه߸ͷఆٛ ∩  ͱͷ྆ํʹؚ·ΕΔಛ௃ྔ −  ʹͷΈଘࡏ͢Δಛ௃ྔ −  ʹͷΈଘࡏ͢Δಛ௃ྔ , , ্هͷͦΕͧΕͷॏཁ౓Λௐ੔͢Δύϥϝʔλ
  4. ྨࣅ౓ͷఆࣜԽ • NVMUJMFWFM-PHJTUJD3FHSFTTJPOΛ༻͍ͯ • ͦΕͧΕͷಛ௃ྔͷد༩౓ͷҧ͍Λ໌Β͔ʹ͢Δ • +BDDBSEͱͷྨࣅ౓ͷҧ͍Λ໌Β͔ʹ͢Δ • 5WFSTLZNPEFMͷྨࣅ౓ -5,6

    = - -∩: − - -;: − (:;-) = (, , ) ֤ಛ௃ྔͷॏΈ ͱॏཁ౓ͷύϥϝʔλ -∩: ྆ऀʹڞ௨ͷಛ௃ྔ͔Ͳ͏͔Λࣔ͢\ ^ͷϕΫτϧ -;: λʔήοτ5ʹͷΈʹଘࡏ͢Δಛ௃ྔ͔Ͳ͏͔Λࣔ͢ :;- ൺֱର৅"ʹͷΈʹଘࡏ͢Δಛ௃ྔ͔Ͳ͏͔Λࣔ͢
  5. ଛࣦؔ਺ͱ࠷దԽ • ଛࣦؔ਺ = − 1 ? @AB C @

    log @Δ- + 1 − @ log 1 − @ ΔSL ℎ @- = B BPQRS ;TU5 V , Δ- = -5,6 − -5,W () • ࠷దԽ minV − B [ log − B [ log − B [ log ℎ ≫ 0 ℎ −
  6. ݁Ռ  ྨࣅੑ൑ఆͷҧ͍ • ϩδεςΟοΫͷ݁Ռ͸5WFSTLZNPEFMͷํ ͕Α͔ͬͨ • ࿦จͰ͸ݴٴͷΈ • ͔ͨͩ͠ͳΓࣅͨΑ͏ͳ݁Ռʹͳ͍ͬͯͨΒ͍͠

    • ྨࣅ౓ʹ΋͕ࠩݱΕͨ • ྨࣅͷ൑ఆ͕೉͍͠૊Έ߹Θͤ ΄Ͳ྆ऀʹ͕ࠩͰ͍ͯΔ • Ұํ͔ͳΓྨࣅ͍ͯ͠Δ PSશ͘ྨࣅͯ͠ͳ͍৔߹ͷ ࠩ͸͔ͳΓখ͍͞