WWW2020 online報告会

https://connpass.com/event/174856/

- Edge Formation In Social Networks To Nurture Content Creators
- OutfitNet: Fashion Outfit Recommendation with Attention-Based Multiple Instance Learning

Transcript

1. CONFIDENTIAL ©2020 Wantedly, Inc. WWW 2020 ΦϯϥΠϯൃදձ April 30, 2020 - ؔࠜ ༟ਓ
2. CONFIDENTIAL ©2020 Wantedly, Inc. ࣗݾ঺հ ؔࠜ༟ਓ
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3. CONFIDENTIAL ©2020 Wantedly, Inc. 1. Edge Formation In Social Networks To Nurture Content Creators 2. OutfitNet: Fashion Outfit Recommendation with 3. Graph Enhanced Representation Learning for News Recommendation ໨࣍
4. CONFIDENTIAL ©2020 Wantedly, Inc. &EHF
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5. CONFIDENTIAL ©2020 Wantedly, Inc. Creatorʹରͯ͠ϦΞΫγϣϯΛ͘Εͦ͏ͳਓʹର্͠ҐʹϥϯΩϯάͯ͠ϨίϝϯσʔγϣϯΛߦ͏͜ͱͰɺ ΫϦΤΠλʔ͕ΑΓcontentsΛੜΈग़ͯ͘͠ΕΔ؀ڥΛ࡞Δɻ → linkedinαʔϏεʹͱͬͯॏཁ ຊ࿦จWWW2020ൃදࢿྉ͔ΒҾ༻ ͲΜͳ࿦จ
6. CONFIDENTIAL ©2020 Wantedly, Inc. ɾScoreؔ਺ΛCreatorͱConsumerʹ෼͚ͯఆٛ - Feedback Sensitivity - pResponse ɾCreatorͱConsumerʹ෼͚ͨ৔߹ͷΦϯϥΠϯA/B ςετͷ࣮ࢪํ๏ ɾ৽ͨͳScoreؔ਺ʹΑΔCreator/Consumer΁ͷӨڹ ߩݙ
7. CONFIDENTIAL ©2020 Wantedly, Inc. 4DPSJOHํ๏ Scoreu,e ͕େ͖͍ͱuserʹentity͕ਪન͞ΕΔɻ user͕entityʹରͯ͠ߦ͏ like, share, comments, clickͷಛ௃ྔ
8. CONFIDENTIAL ©2020 Wantedly, Inc. Q3FTQPOTF pResponseu,e ɾConsumer u͕Creator e΁FeedbackΛى֬͜͢཰ ɾConsumerͱCreator͢΂ͯͷಛ௃ྔΛೖΕΔɻ Logistic regression modelͰֶश ɾlike΍comment͕༩͑ΒΕͨΒpositiveϥϕϧͱ͢Δɻ
9. CONFIDENTIAL ©2020 Wantedly, Inc. 'FFECBDL
   4FOTJUJWJUZ FeedBackΛड͚Δ਺͕ଟ͍΄ͲɺCreationΛߦ͏֬཰্͕͕Δɻ → FeedBackΛड͚ͨΒCreation͕৳ͼΔਓΛਪનͤ͞΍͘͢͢Δɻ ؍ଌҎ߱ʹҰͭͰ΋ Creation͔ͨ͠ʁ
10. CONFIDENTIAL ©2020 Wantedly, Inc. ࣮ݧσʔλ LinkedinͷϦΞϧσʔλΛ༻͍ͯonline A/BςετΛ࣮ࢪ (Follow Recommendation) Dual A/Bςετ ɾConsumerͱCreatorͷೋͭʹର͠ɺTreatmentͱControlΛ෼͚Δ ɾTeͱCeɺTuͱCuΛͦΕͧΕଌΔ͜ͱͰɺTradeoffͷؔ܎Λௐ΂Δ
11. CONFIDENTIAL ©2020 Wantedly, Inc. $BOOJCBMJ[BUJPO
    FGGFDU Creatorʹ͓͍ͯɺTreatment܈(Value_creatorΛ଍ͨ͠΋ͷ)ͱControl(ͦΕҎ֎)܈Ͱ͸ Treatmentͷํ͕ਪન͞Ε΍͘͢ͳͬͯ͠·͏ɻ
12. CONFIDENTIAL ©2020 Wantedly, Inc. ݁Ռ ɾFollowerʹରͯ͠͸ɺFollowΫϦοΫ਺΍ίϯςϯπ΁ͷinteraction͕ݮͬͯ͠·ͬͨɻ ɾContribute(share΍like, comment, messageͳͲ)Λߦ͏΋ͷ͕1.13%૿͑ͨɻ ɾMonthly Contributions͸9%૿Ճͨ͠ɻ ɾContributor͕૿͑ɺContents͕૿͑Δ͜ͱ͸Linkedinʹͱͬͯخ͍͜͠ͱͩɻ
13. CONFIDENTIAL ©2020 Wantedly, Inc. ٙ໰ɾײ૝ ɾDual A/Bςετͷͱ͜ΖͰɺProducerͱViewerͷ෼͚ํ͕෼͔Βͳ͔ͬͨ - ͦ΋ͦ΋෼͚͍ͯΔͷ͔ʁ ɾFollowerͷFollow཰͕4%ۙ͘ݮͬͯ͠·͍ͬͯΔͷ͸େม? ɾOnline A/BςετΛͨ݁͠Ռɺ͔ͬ͠ΓͱContribution਺͕૿͍͑ͯΔͷ͸ૉ੖Β͍͠ɻ
14. CONFIDENTIAL ©2020 Wantedly, Inc. 0VUGJU/FU
    
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15. CONFIDENTIAL ©2020 Wantedly, Inc. ͲΜͳ࿦จ Fashion Recommendationʹ͓͍ͯΞΠςϜ୯ମͰਪનͯ͋͛͠ΔͷͰ͸ͳ͘ɺ Outfit(ίʔσΟωʔτ?)ͷ޷ΈΛֶश͠ɺͦͷ޷Έʹ͋ͬͨOutiftΛਪન͍ͨ͠ɻ 1. OutfitΛ΋ͱʹΞΠςϜͷrelevancyΛֶशͤ͞Δ࢓૊Έ 2. Ϣʔβʔͷ޷Έʹ͋ͬͨFashion outfitΛਪન Multiple instance learning (MIL)ͱͯ͠ղ͘ɻ ɾෳ਺ͷΞΠςϜʹରͯ͠Ұͭͷϥϕϧ͕͍͍ͭͯΔ໰୊ ɾͲͷΞΠςϜ͕like/dislike͸ߟྀ͠ͳ͍
16. CONFIDENTIAL ©2020 Wantedly, Inc. 'BTIJPO
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    ϑΝογϣϯΞΠςϜؒͷؔ܎ੑͷຒΊࠐΈֶश S: outfitͷsubset x: itemͷrepresentation ɾ xi (positive) : S + {x}ؚ͕·ΕΔoutfit͕ଘࡏ͢Δ ɾ xj (negative) : S + {x}ؚ͕·ΕΔoutfit͕ଘࡏ͠ͳ͍ ಉ͡outfitʹೖΓͦ͏ͳΞΠςϜಉ࢜ͷڑ཭͕ ۙ͘ͳΔΑ͏ʹֶश Y@Jͱ4ͷSFMFWBODZ
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    ΞΠςϜͷrepresentationͷt-SNEʹΑΔՄࢹԽ ɾFIR: ಉ͡ܥ౷(taste)ͷΞΠςϜ͕ ɹɹɹۙ͘ʹ഑ஔ͞ΕΔΑ͏ʹݟ͑Δɻ ɾDenseNet: Visual΍γϧΤοτʹґଘͯ͠ ɹɹɹΞΠςϜ͕഑ஔ͞Ε͍ͯΔɻ
18. CONFIDENTIAL ©2020 Wantedly, Inc. 0VUGJU
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    01 Ϣʔβʔͷoutfit΁ͷڵຯΛଌΔωοτϫʔΫ '*3
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19. CONFIDENTIAL ©2020 Wantedly, Inc. 1FSTPOBMJ[FE
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    4DPSJOH Personalized Outfit ScoringͰ͸poolingͷࡍʹAttentionΛߦ͍ͬͯΔɻ VTFSͷSFQSFTFOUBUJPO GVTFE VTFSͱ JUFNΛ݁߹ͨ͠΋ͷ
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20. CONFIDENTIAL ©2020 Wantedly, Inc. "UUFOUJPOͷޮՌ Outfit 1Ͱ͸πͷ஋͸૯ͯ͡େ͖͍͕ɺOutfit 2, 3Ͱ͸খ͍͞ɻ Outfit 3ͷηʔλʔ͸πͷ஋͕େ͖͘ͳ͍ͬͯͯɺͦΕʹ൐ͬͯuser͕޲͚ΔAttention΋େ͖͘ͳ͍ͬͯΔɻ → ηʔλʔͷ৭ຯͱOutfit 1ͷ৭ຯ͕ࣅ͍ͯΔ͔Βೲಘ Outfit 1ͷΈUserͷ޷ΈͳOutfit
21. CONFIDENTIAL ©2020 Wantedly, Inc. 'JMM*O5IF#MBOL '*5# λεΫ ͋ΔOutfitʹର͠ҰͭMaskΛ͠ɺϥϯμϜʹ3͖ͭ࣋ͬͯͯ4୒Λߦ͏ͱ͍͏λεΫɻ ɾFIRʹରͯ͠ͷλεΫ
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    1SFEJDUJPO Outfit iͱOutfit jʹରͯ͠ɺͲͪΒͷOutfit͕޷Έ͔Λ֤Ϣʔβʔʹରͯ͠ٻΊ͍ͯ͘ɻ
23. CONFIDENTIAL ©2020 Wantedly, Inc. σʔληοτʹର͢Δิ଍ ຊ࿦จWWW2020ൃදࢿྉ͔ΒҾ༻
24. CONFIDENTIAL ©2020 Wantedly, Inc. ·ͱΊɾײ૝ • FIRʹΑͬͯΞΠςϜಉ࢜ͷؔ࿈ੑΛֶश͢Δ͜ͱ͕Ͱ͖ͨɻ • OPʹΑͬͯoutfit಺ͷΞΠςϜΛߟֶྀͯ͠श͢ΔϑϨʔϜϫʔΫΛ࡞Εͨɻ • FIRͱOPʹΑͬͯ fill-in-the-blank(FITB)taskͰ SOTAΛ֫ಘͰ͖ͨɻ • AttentionΛར༻ͯ͠Ϣʔβʔʹpersonalized͞ΕͨfashionΛ֫ಘͰ͖ͨɻ