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T88
March 24, 2023
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レコメンドコンペ入門
T88
March 24, 2023
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Transcript
ؔLBHHMFSձJO0TBLB5ɹ Ϩίϝϯυίϯϖೖ H&M Personalized Fashion Recommendations OTTO – Multi-Objective Recommender
System
͡Ίʹ
ࣗݾհ ɾςʔϒϧίϯϖ͔Γग़ͯΔɻࠓ෯Λ֦͍͛ͨʢͱຖݴͬͯΔʣ ɾؔLBHHMFSձɹভࢧ෦
ࡐ
w ϑΝετϑΝογϣϯϒϥϯυ).ͷϨίϝϯυ͕ࡐ w ސ٬ଐੑใɺଐੑใɺաڈͷߪೖཤྺ͕σʔλͱͯ͠༩͑ΒΕΔ w σʔλ͕༩͑ΒΕ͍ͯͳ͍ະདྷ̍िؒʹ͓͍ͯશͯͷސ٬ʹରͯͦ͠ͷਓ ͕ങ͍ͦ͏ͳ̍̎ͷϦετΛఏࣔ͢Δ w ධՁࢦඪN"1! NFBOBWFSBHFQSFDJTJPO
USBJO ؒ UFTU XFFL 5SBJO 5FTUσʔλ ධՁࢦඪ ސ٬ଐੑ ྸɺձһใͳͲ ଐੑ ΧςΰϦɺ৭ɺઆ໌จ ը૾ɹͳͲ ߪೖཤྺ σʔλ
w υΠπͷΦϯϥΠϯγϣοϓ࠷େख0550ͷϨίϝϯυλεΫ w ֤TFTTJPO͝ͱ֤UZQF DMJDL DBSUT PSEFST ͷཤྺ͕σʔλͱͯ͠༩͑ΒΕΔ w UFTU࠷ऴिͷTFTTJPO͕ରɻTFTTJPOͷ్த·Ͱͷཤྺ͕༩͑ΒΕ͍ͯΔঢ়ଶͰͦͷޙͷDMJDL
DBSUT PSEFSTΛ̎̌ݸͷϦετͷܗͰ༧ଌ͢Δ w ධՁࢦඪUZQF͝ͱͷSFDBMM!ͷՃॏฏۉ 5SBJO 5FTUσʔλ ධՁࢦඪ
ϨίϝϯυίϯϖϕʔεϥΠϯ࡞Δͷ͕͍͠ʁ w σʔλΛ༩͑ΒΕͨ࣌Ͱɺػցֶशʹ࣋ͪࠐΊΔܗʹͳ͍ͬͯͳ͍ w ૉʹػցֶशͷܗʹ͍࣋ͬͯ͜͏ͱ͢ΔͱɺଟͷºଟͷϢʔβͷ Έ߹Θ͕ͤରͱͳΔ͕ɺ౸ఈࡹ͖͖Εͳ͍ͨΊ͕ඞཁ
ఆੴ $BOEJEBUF3FSBOL.PEFM ΊͬͪΌ ଟ͍ ఔ 5PQ/ ਪનީิ શ
ਪનީิ ༧ଌ TU4UBHF $BOEJEBUFHFOFSBUJPO ൺֱతφΠʔϒͳख๏Ͱશ ͔ΒਪનީิΛબͼग़ ͢ OE4UBHF 3F3BOL ػցֶशϞσϧʹΑΓɺ நग़͞Εͨਪનީิͷϥ ϯΫ͚Λߦ͏
TU4UBHFͷΞϓϩʔν
φΠʔϒͳΞϓϩʔν w Ϣʔβ͕աڈߪೖͨ͠ʢग़ݱ͕͍࣌ۙॱɺස͕ଟ͍ॱͳͲͰTPSUʣ w ਓؾ w ϢʔβଐੑผͷਓؾʢಉͰΑ͘ചΕ͍ͯΔͳͲʣ w ಛఆظؒͰΑ͘ചΕͨʢ༧ଌରલिͷച্ͳͲʣ
$P7JTJUBUJPONBUSJY w ؒͷڞىੑʹணɻҰॹʹొ͢ΔΛΧϯτ w ͢Ͱʹొ͍ͯ͠Δͷ࠷සϖΞΛਪનީิͱͯ͠நग़͢Δ w 0UUPίϯϖͰΞϓϩʔνͷϕʔεͱͯ͘͠׆༻͞Εͨ IUUQTXXXLBHHMFDPNDPEFWTMBZLPWTLZDPWJTJUBUJPONBUSJY " #
$ % " " " # * + " " & ' # ( ) # % - ) / 0 % Y Z $OU " # " % " ) " $ ɾ ɾ ɾ
ྨࣅΛ༻͍ͨΞϓϩʔν w ͷܥྻ͔ΒJUFNWFDΛߦ͍ɺ͜ͷຒΊࠐΈϕΫτϧͷྨࣅΛܭࢉɻྨ ࣅͷߴ͍ϖΞΛਪનީิͱ͢Δ w ߪೖ͔ΒϢʔβؒͷྨࣅΛܭࢉɻྨࣅ͕ߴ͍ϢʔβͷߪೖΛਪ નީิͱ͢Δ w ߪೖ͔ΒϢʔβΛΫϥελϦϯάɻΫϥελ͝ͱͷਓؾΛਪનީิͱ ͢Δ
ͦͷଞศརύοέʔδ w 3FD#PMFଟͷϨίϝϯυϞσϧʢ࣌Ͱݸʂʣ͕ڞ௨ͷ ϑϨʔϜϫʔΫͰ࣮Ͱ͖Δ IUUQTSFDCPMFJPJOEFYIUNM
TUTUBHFॴײ w TUTUBHFͰͲΕ͚ͩଟ༷ͳΞϓϩʔνΛॏͶΒΕ͔͕ͨউഊʹେ͖͘Өڹ w γϯϓϧͳΞϓϩʔν͕͔ͳΓޮ͘ w ·ͣγϯϓϧΞϓϩʔνͷѥछʢಛఆ݅ʹߜΔͳͲʣΛ৭ʑࢼ͢ͱΑ͍ w ཧݶքͱਪનΛᛀΈͳ͕ΒΞϓϩʔνͷݕ౼Λߦ͏
OE4UBHFͷΞϓϩʔν
ಛྔ w ಛྔ w Ϣʔβʔಛྔ w ºϢʔβʔಛྔ ˞TU4UBHFͰͷॱҐ͚ʹͬͨࣈΛಛྔͱͯ͠͏ͱྑ͍
Ϟσϧ w ຆͲ(#%5͕༻͍ΒΕ͍ͯΔ w ̎ྨͱͯ͠ղ͘ɺ3BOLFSϞσϧͰղ͘ɺύλʔϯ͋Γ w 3BOLFSϞσϧ w -(#.3BOLFS MBNCEBSBOL
w $BUCPPTU3BOLFS :FUJ3BOL
OE4UBHFॴײ w TU4UBHFͱൺֱ͢Δͱɺॏཁ͕एׯམͪΔ w ຖճɺSBOLFSࢼ͚͢Ͳɺ݁ہྨͰྑ͍͔ɺͬͯͳͬͯΔʢ$BUCPPTUࢼ͠ ͯͳ͍ͷͰ࣍ճͬͯΈ͍ͨʣ
ͦͷଞ
όϦσʔγϣϯ USBJOσʔλ TU4UBHFநग़OE4UBHFಛྔɹ OE4UBHF ֶश OE4UBHF ධՁ TU4UBHFநग़OE4UBHFಛྔɹ w ࣌ܥྻͰׂɻ௨ৗͷֶशɾධՁظؒͱผʹީิநग़ͱಛྔ࡞༻ͷظؒ
ΛΔඞཁ͕͋Δ w ީิநग़ಛྔͷϦʔΫʹؾΛ͚Δ
Ξϯαϯϒϧ IUUQTXXXLBHHMFDPNDPEFUJUFSJD[INFOTFNCMJOHIPXUP w ֤༧ଌͷSBOLʹॏΈΛֻ͚ͯ WPUF͢ΔܗͰΞϯαϯϒϧΛߦ ͏ w ֤ϞσϧͰ࠷ऴ༧ଌҎ্ͷީ ิΛग़ྗͯ͠Ξϯαϯϒϧͨ͠ ΓɺॱংʹΑΔείΞมಈΛ
͑ΔͨΊʹॏΈΛௐ͢Δɺͳ Ͳͷ͍ͯ͠Δέʔε
σʔλྔɾॲཧ࣌ؒͷέΞ w ߴ3".ڥΛ४උʢLBHHMFڥͰۚϝμϧऔΔਓ͍ΔͷͰ͑ʁʣ w OETUBHFͷσʔλΛ࡞͢ΔࡍʹOFHBUJWFTBNQMJOH w QPMBSTͱDVEGΛ׆༻͢Δ w ࣄલܭࢉதؒσʔλͷDBDIFԽͳͲͰ࣮ݧຖͷܭࢉྔΛݮΒ͢ w
ධՁΛҰ෦ͷσʔλͰߦ͏
w Ϩίϝϯυίϯϖָ͍͠ʂ w ϕʔεϥΠϯ࡞Δͷ͕ൺֱతେม ࢀՃऀଟ͍ͷͰϝμϧ͕औΓ ͍͢ w ͥͻࢀՃ͠Α͏ ͓ΘΓʹ