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論文紹介: Improving Implicit Feedback-Based Recommendation through Multi-Behavior Alignment(Xin Xin et al., 2023)

Shuhei Goda
November 22, 2023

論文紹介: Improving Implicit Feedback-Based Recommendation through Multi-Behavior Alignment(Xin Xin et al., 2023)

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Shuhei Goda

November 22, 2023
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  1. ©2023 Wantedly, Inc.
    ࿦จ঺հɿImproving Implicit Feedback-Based
    Recommendation through Multi-Behavior Alignment
    ΢ΥϯςουϦʔࣾ಺ษڧձ~ਪન࿦จಡΈձ~
    Nov. 22 2023 - ߹ాपฏʢ΢ΥϯςουϦʔגࣜձࣾʣ
    Xin Xin et al., 2023


    https://dl.acm.org/doi/10.1145/3539618.3591697

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  2. ©2023 Wantedly, Inc.
    ࣗݾ঺հ
    ໊લɿ

    ߹ా पฏ(Shuhei Goda)


    ॴଐͱ໾ׂɿ

    ɾ΢ΥϯςουϦʔגࣜձࣾ(2019~)

    ɾਪનνʔϜϦʔμʔ

    ɾML Tech Lead & Product Manager


    Kaggle Tierɿ

    Kaggle Competitions Grandmaster @hakubishin3
    @jy_msc
    @shuheigoda

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  3. ©2023 Wantedly, Inc.
    αϚϦʔ
    ෳ਺ͷߦಈ৘ใΛΞϥΠϝϯτͯ͠ਅͷᅂ޷Λਪఆ͢Δख๏ΛఏҊͨ͠࿦จ


    • Ϟνϕʔγϣϯɿෳ਺ͷߦಈσʔλΛֶशʹ࢖͏͜ͱͰɺ֤ߦಈσʔλͷܽ఺Λิ͍͍ͨ


    • ՝୊ɿ


    • ߦಈσʔλ෼෍ͷؒʹ͸Ϊϟοϓ͕͋Δ


    • औಘ͕༰қͳߦಈσʔλ΄ͲϊΠζ͕େ͖͍


    • ղܾํ๏ɿ


    • Ϣʔβʔͷਅͷᅂ޷Λજࡏม਺ͱ͠ɺͦΕʹج͍ͮͨߦಈ݁Ռ͕؍ଌม਺ͱΈͳ͢


    • જࡏม਺ΛڬΜͰɺෳ਺ͷߦಈσʔλΛద੾ʹΞϥΠϝϯτ͢Δ

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  4. ©2023 Wantedly, Inc.
    ຊݚڀͷϞνϕʔγϣϯ
    ҉໧తϑΟʔυόοΫΛ׆༻ͯ͠ɺߴਫ਼౓ͳਪનΛߦ͍͍ͨ


    • ҉໧తϑΟʔυόοΫʢimplicit feedbackʣͷྫɿΫϦοΫɺΧʔτ΁ͷ௥Ճɺߪೖ


    • ໌ࣔతϑΟʔυόοΫʢexplicit feedbackʣͱҟͳΓɺ҉໧తϑΟʔυόοΫ͸

    σʔλΛऔಘ͠΍͘͢ɺଟ͘ͷਪનγεςϜ͸͜ΕΛ΋ͱʹֶश͞Ε͍ͯΔ
    ໌ࣔత ҉໧త
    σʔλྔ গͳ͍ ଟ͍
    σʔλͷਖ਼֬͞ ਖ਼֬ ෆਖ਼֬
    ະධՁͱωΨςΟ
    ϒͷ۠ผ
    ໌֬ ෆ໌֬
    ʰਪનγεςϜ࣮ફೖ໳ʱhttps://www.oreilly.co.jp/books/9784873119663

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  5. ©2023 Wantedly, Inc.
    ຊݚڀͷϞνϕʔγϣϯ
    Ұൠతʹ͸ΫϦοΫσʔλ͚ͩΛ࢖͏͜ͱ͕ଟ͍


    • ΫϦοΫσʔλ͸༷ʑͳ҉໧తϑΟʔυόοΫͷதͰ΋ಛʹ༰қʹೖखՄೳ


    • ͔͠͠ɺϊΠζ΍όΠΞε͕େ͖͘ɺਖ਼֬ͳᅂ޷ͷਪఆ͕೉͍͠

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  6. ©2023 Wantedly, Inc.
    ຊݚڀͷϞνϕʔγϣϯ
    ΫϦοΫσʔλͰ͸ͳ͘ɺߪೖσʔλ͚ͩΛར༻͢Δͷ͸ʁ


    • ਪનγεςϜͰϢʔβʔʹଅਐ͍ͤͨ͞ߦಈʢeίϚʔεͰ͋Ε͹ߪೖʣΛֶशʹ

    ࢖͑ΔͷͰ͋Ε͹ɺͦΕʹӽͨ͜͠ͱ͸ͳ͍


    • ͔͠͠ɺσʔλͷεύʔεੑʹىҼ͢Δ໰୊΍ίʔϧυελʔτ໰୊͕ੜ͡΍͍͢

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  7. ©2023 Wantedly, Inc.
    ຊݚڀͷϞνϕʔγϣϯ
    ෳ਺ͷछྨͷߦಈΛֶशʹར༻ͯ͠ɺͦΕͧΕͷܽ఺Λิ͍͍ͨ


    • ิॿతͳߦಈσʔλ(ΫϦοΫ)Λར༻͢Δ͜ͱͰɺεύʔεͳλʔήοτߦಈ(ߪೖ)ͷ

    ༧ଌੑೳΛڧԽͤ͞Δ
    ΫϦοΫ ߪೖ
    σʔλྔ ଟ͍ গͳ͍
    ϊΠζͷେ͖͞ େ͖͍ খ͍͞
    ίʔϧυελʔτ ൃੜ͠ʹ͍͘ ൃੜ͠΍͍͢

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    ղܾ͍ͨ͠՝୊ᶃ
    ෳ਺छྨͷߦಈσʔλ෼෍ͷؒʹ͸Ϊϟοϓ͕ଘࡏ͢Δ


    • ྫ͑͹ɺϢʔβʔ͕ΫϦοΫ͕ͨ͠ߪೖ͠ͳ͔ͬͨͳͲɺ֤ʑͷϊΠζʹΑͬͯੜ͡Δ


    • φΠʔϒʹʮߦಈͷछྨ͝ͱʹϢʔβʔͷ޷ΈΛֶशͨ͠ޙͦΕͧΕΛ૊Έ߹ΘͤΔʯ

    ͜ͱΛͨ͠ͱͯ͠΋ɺҰ؏ͨ͠Ϣʔβʔͷਅͷᅂ޷Λਪఆ͢Δ͜ͱ͸೉ͦ͠͏

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    ղܾ͍ͨ͠՝୊ᶄ
    ิॿతͳߦಈσʔλͰ͋ΔΫϦοΫσʔλͷϊΠζ͕ඇৗʹେ͖͍


    • ϊΠζͷେ͖͞Λߟྀ͓͔ͯ͠ͳ͍ͱɺ͜ΕͷӨڹ͕ࢧ഑తʹͳͬͯ͠·͏

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    ઌߦݚڀ͸Ͳ͏͍ͯͨ͠ʁ
    ෳ਺छྨͷߦಈΛ׆༻͢Δઌߦݚڀ͸ɺ՝୊ᶃᶄʹରԠͰ͖͍ͯͳ͍ͱओு


    • ߦಈͷछྨΛҟछͷϊʔυʹஔ͖׵͑ͯάϥϑͰղ͍ͨΓɺϚϧνλεΫֶशΛͨ͠Γ


    • σʔλ෼෍ͷΪϟοϓΛߟྀͰ͖͍ͯͳ͍ͷͰɺීวతͳᅂ޷දݱΛ࡞Ε͍ͯͳ͍ͷͰ͸


    • ิॿ৘ใͷϊΠζͷେ͖͞ΛߟྀͰ͖͍ͯͳ͍ͷͰɺޮՌతͳิॿʹ͸ͳ͍ͬͯͳ͍ͷͰ͸

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    ຊݚڀͰࢧ͍࣋ͨ͠Ծઆ
    ෳ਺छྨ͋Δߦಈ͸ͦΕͧΕϢʔβʔͷਅͷᅂ޷ʹج͍͍ͮͯΔ
    ਅͷᅂ޷෼෍ P(R_t)
    ΫϦοΫ෼෍ P(R_g) ߪೖ෼෍ P(R_f)
    ʴϊΠζͳͲ ʴϊΠζͳͲ

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    Ծઆʹج͍ͮͨख๏ͷఏҊ
    જࡏม਺(ਅͷᅂ޷)ΛڬΜͰɺෳ਺छྨͷߦಈσʔλ෼෍ΛΞϥΠϝϯτ͢Δ


    • ਅͷᅂ޷෼෍Λֶशͯ͠ਪ࿦ʹ࢖͏


    • ֤ߦಈσʔλ෼෍ͱͷؒͷKL-divͷ࠷খԽͱ֤ߦಈσʔλ෼෍ͷ໬౓࠷େԽΛ໨ࢦ͢
    ֶशɿ
    ਪ࿦ɿ
    ਪ࿦࣌ʹP(R_f)Λ࢖͍ͬͯΔͷ͸ܦݧతʹྑ͔͔ͬͨΒ

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    ֶश࣌ͷ޻෉
    ֶश҆ఆੑΛߴ͘͢ΔͨΊʹKL-divͷܭࢉͰ͸ࣄલֶशࡁΈϞσϧΛ࢖͏


    • ࣄલʹߦಈͷछྨ͝ͱʹϞσϧΛֶश͓ͤͯ͘͞
    ੺࿮ͷՕॴҎ֎ͷϞσϧֶ͕शର৅

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    ࣮ݧઃܭ
    ࣮ݧͰݕূ͍ͨ͜͠ͱ͸ʁ(RQ)


    • ఏҊख๏ͷੑೳ͸طଘͷෳ਺ߦಈϞσϧΑΓ΋޲্͍ͯ͠Δ͔ʁ


    • ఏҊख๏ͷੑೳ͸طଘͷσϊΠδϯάख๏ΑΓ΋޲্͍ͯ͠Δ͔ʁ

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    ࣮ݧઃܭ
    ઃܭ߲໨


    • σʔληοτɿECαʔϏεͷΦʔϓϯσʔλʢΫϦοΫΛิॿɺߪೖΛλʔήοτͱ͢Δʣ


    • ධՁࢦඪɿRecall@k ͱ NDCG@k (k=10, 20)ɺ྆ऀͱ΋஋͕ߴ͍΄Ͳྑ͍݁Ռ


    • ϕʔεϥΠϯɿϋΠύϥ͸ධՁσʔληοτ͝ͱʹඍௐ੔

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    ࣮ݧ݁Ռᶃ
    طଘͷෳ਺ߦಈϞσϧΑΓ΋༧ଌਫ਼౓͕޲্͍ͯ͠Δ͜ͱΛ֬ೝ
    ୯Ұ
    ෳ਺

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    ࣮ݧ݁Ռᶄ
    طଘͷσϊΠδϯάख๏ΑΓ΋༧ଌਫ਼౓͕޲্͍ͯ͠Δ͜ͱΛ֬ೝ
    ୯Ұ
    ୯Ұ
    σ
    ϊ
    Π
    δ
    ϯ
    ά


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    αϚϦʔ
    ෳ਺ͷߦಈ৘ใΛΞϥΠϝϯτͯ͠ਅͷᅂ޷Λਪఆ͢Δख๏ΛఏҊͨ͠࿦จ


    • Ϟνϕʔγϣϯɿෳ਺ͷߦಈσʔλΛֶशʹ࢖͏͜ͱͰɺ֤ߦಈσʔλͷܽ఺Λิ͍͍ͨ


    • ՝୊ɿ


    • ߦಈσʔλ෼෍ͷؒʹ͸Ϊϟοϓ͕͋Δ


    • औಘ͕༰қͳߦಈσʔλ΄ͲϊΠζ͕େ͖͍


    • ղܾํ๏ɿ


    • Ϣʔβʔͷਅͷᅂ޷Λજࡏม਺ͱ͠ɺͦΕʹج͍ͮͨߦಈ݁Ռ͕؍ଌม਺ͱΈͳ͢


    • જࡏม਺ΛڬΜͰɺෳ਺ͷߦಈσʔλΛద੾ʹΞϥΠϝϯτ͢Δ

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