会社訪問アプリ「Wantedly Visit」における相互推薦システムの応用事例 / deim2020-rrs-wantedly-visit

2020年3月3日 DEIM2020 (https://db-event.jpn.org/deim2020/index.html) における技術報告の資料です。

[B4] 情報推薦②　3月3日 13:30 ～ 15:10
https://cms.deim-forum.org/deim2020/program/?oral#/B4

本番ではこの資料の縮小版で発表を行っています。

従来の推薦システムと比較した「相互推薦システム」の特徴や課題を説明し，
それらに対して Wantedly Visit ではどのような考えでどのような取り組みを行っているのか簡単に紹介しました。

Transcript

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25. ©2020 Wantedly, Inc. ؔ࿈ݚڀطଘख๏ ✓ [RECON] (Pizzato 2010) RECON: A Reciprocal Recommender for Online Dating ‣ աڈʹ޷ҙΛࣔͨ͠૬खͷϢʔβʹڞ௨͢Δཁૉ͔ΒɼϢʔβ͝ͱͷ҉໧తͳᅂ޷৘ใʢetc. ମܕɼਖ਼֬ɼֶྺ…ʣΛநग़ɻ ‣ நग़ͨ͠ᅂ޷৘ใͱ૬खͷϢʔβͷϓϩϑΟʔϧͷҰக౓Λܭࢉ͢ΔίϯςϯπϕʔεͰ୯ํ޲ͷద߹౓Λද͢ Preference Score Λࢉग़ɻ ‣ ̎ͭͷ Preference Score ͔ΒAggregation Function(ௐ࿨ฏۉ)Ͱ૒ํ޲ͷద߹౓Λද͢ Reciprocal Preference Score Λࢉग़ɻ ✓ [RCF] (Xia 2015) Reciprocal Recommendation System for Online Dating ‣ ߦಈཤྺʹجͮ͘ϢʔβϕʔεͷڠௐϑΟϧλϦϯάʢk-ۙ๣ʣͰPreference Score Λࢉग़ɻ ‣ Aggregation Function ͸ௐ࿨ฏۉΛར༻ɻ ‣ RECON (Pizzato 2010) ͷੑೳΛେ෯ʹ௒͑Δɻ ✓ [LFRR](Neve 2019) Latent Factor Models and Aggregation Operator for Collaborative Filtering in Reciprocal Recommender Systems ‣ ߦಈཤྺʹج͖ͮ࡞੒ͨ͠ User-User ߦྻʹMatrix Factorization Λద༻ͯ͠ Preference Score Λࢉग़ɻ ‣ Aggregation Function ʹ͍ͭͯɼௐ࿨ฏۉҎ֎ͷؔ਺ʹ͍ͭͯ΋ൺֱ࣮ݧͨ͠ɻ ‣ ੑೳ͸ RCF (Xia 2015) ͱಉఔ౓͕ͩɼࣄલʹϞσϧΛֶश͓͚ͯ͠ΔͷͰߴ଎ɻ User A to User B Preference Score User B to User A Preference Score Reciprocal Preference Score Aggregation Function
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    w ࣗݾ঺հɼձࣾͱϓϩμΫτͷ঺հ
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    աڈʹૹ৴ͨ͠εΧ΢τ͔ΒاۀϢʔβͷᅂ޷৘ใΛ࡞੒͢Δࡍ͸ɼεΧ΢τͷछྨΛߟྀͨ͠޻෉Λ͢Δɻ w ٻ৬ऀϢʔβ͸ൺֱత͜ͷ܏޲͕ऑ͍ͱߟ͑ΒΕΔɻ
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    w ҰํͰɼͬ͘͡Γͱ͓ޓ͍ͷᅂ޷͕Ϛον͍ͯ͠Δ͔Λߟ͑ͯগ਺ͷԠืΛ͍ͯ͠Δٻ৬ऀϢʔβ΋΋ͪΖΜଘࡏ͢Δɻ ˠ
    աڈͷԠื৘ใ͔Βٻ৬ऀϢʔβͷᅂ޷৘ใΛ࡞੒͢Δࡍ͸ɼϢʔβͷԠืͷॏΈΛߟྀͨ͠޻෉Λ͢Δɻ
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    ߦಈཤྺ͕஝ੵ͞ΕΔʹͭΕɼίϯςϯπϕʔε͔ΒߦಈཤྺϕʔεͷਪનʹҠߦ͍ͯ͘͠ɻ
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    ϢʔβͷϥΠϑαΠΫϧ
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    w స৬ҙཉͷߴ·Δલ͔ΒϢʔβ͕ొ࿥ͯ͘͠Ε͍ͯΔ͜ͱ΋ଟ͍ɻ
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    ʮγΰτ୳͠ʯͱ͍͏Ұ࣌తͳ׆ಈͷจ຺ʹ͓͍ͯ΋ൺֱత௕͍ظؒͷߦಈཤྺ͕஝ੵ͞ΕΔɻ ˠ
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    w .FFUVQ
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    w ಉ͡ʮԠืʯͰ΋ɼస৬͍ͨ͠Ԡืͳͷ͔ͨͩڵຯ͕͋Δ͔Β࿩Λฉ͍ͯΈ͍ͨԠืͳͷ͔Ͱ͸શ͘ҙຯ͕ҧ͏ɻ
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    w ೳಈతͳϢʔβͱडಈతͳϢʔβ͕͍ΔɻडಈతͳϢʔβ͸ਪન͞Εͳ͍ͱ੒ޭମݧΛಘΒΕͳ͍ɻ w ʮԠืʯΛ͢Δ͜ͱ͕໨తͳϢʔβͱʮεΧ΢τʯΛड͚औΔ໨తͷϢʔβ͕ࠞࡏ͢Δɻ
    w ʮεΧ΢τʯΛड͚औΔ໨తͷडಈతͳٻ৬ऀϢʔβ͸اۀϢʔβͷεΧ΢τػೳͰਪન͞Εͳ͍ݶΓϚονϯά͸ੜ·Εͳ ͍ɻ
    w ҰํͰɼͨ͘͞ΜʮԠืʯͯ͘͠ΕΔೳಈతͳٻ৬ऀϢʔβͷํ͕৘ใ΋ͨ͘͞Μ͋ΔͨΊɼاۀϢʔβʹରͯ͠΋ൺֱత࣭ ͷߴ͍ਪન͕ՄೳͰ͋Δɻ ˠ
    ೳಈతͳϢʔβͱडಈతͳϢʔβ͕ਪનʹؚ·ΕΔׂ߹Λ޻෉͢Δɻ w डಈతͳϢʔβͷதʹ͸ɼͦ΋ͦ΋શ͘Ϟνϕʔγϣϯ͕ͳͯ͘ͲΜͳεΧ΢τΛड͚औͬͯ΋ฦ৴ ͠ͳ͍Α͏ͳϢʔβ΋Ұఆ਺ଘࡏ͢Δɻ
    w ਪન͕ѱ͍ͷ͔Ϟνϕʔγϣϯ͕௿ͯ͘ฦ৴͢Δؾ͕ͳ͍ͷ͔ͷ۠ผ͸೉͍͠ɻ ˠ
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32. ©2020 Wantedly, Inc. ਪનγεςϜͷߏங User(Recruiter/Company) User(Job Seeker) some models ༷ʑͳαʔϏεಛ༗ͷॲཧ Good Recommendations ༷ʑͳ޻෉ΛڽΒͨͨ͘͠͞Μͷಛ௃ྔ ࠓޙͷਓੜʹؔΘΔΑ͏ͳαʔϏεͰ͋ΔͨΊ
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    w ձࣾ๚໰ΞϓϦʮ8BOUFEMZ
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    ‣ ϢʔβͷϥΠϑαΠΫϧ͕୹͘ɼϢʔβͷߦಈʹجͮ͘҉໧తͳϢʔβͷᅂ޷৘ใ͕ू·Γʹ͍͘ɻ
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    w 'BJSOFTT
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35. ©2020 Wantedly, Inc. 3FGT • (Pizzato 2010) Luiz Pizzato, Tomek Rej, Thomas Chung, Irena Koprinska, and Judy Kay. 2010. RECON: a reciprocal recommender for online dating. Proceedings of the fourth ACM conference on Recommender systems P. 207-214. • (Pizzato 2012) Luiz Pizzato, Tomasz Rej, Joshua Akehurst, Irena Koprinska, Kalina Yacef, and Judy Kay. 2012. Recommending people to people: the nature of reciprocal recommenders with a case study in online dating. User Model User-Adap Inter (2013) 23: 447. • (Xia 2015) Peng Xia, Benyuan Liu, Yizhou Sun, and Cindy Chen. 2015. Reciprocal Reciprocal recommendation System for Online Dating. Proceedings of the 2015 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining P. 234-241. • (Neve 2019) J Neve, I Palomares.2019. Latent Factor Models and Aggregation Operators for Collaborative Filtering in Reciprocal Recommender Systems Proceedings of the 13th ACM Conference on Recommender Systems, 219-227.