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1 ݸਓͷ৴པΛՄࢹԽ͢Δ৽͍͠SNS גࣜձࣾbajji

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Confidential ୅දϓϩϑΟʔϧ 2 খྛ৻࿨ɺത࢜ʢ޻ֶʣ ϑΝ΢ϯμʔ݉$&0 ϏδωεɾϒϨʔΫεϧʔ େֶ।ڭत ʮϒϩοΫνΣʔϯ୲౰ʯ ུྺ ೥ɹେࡕେֶେֶӃଔɻത࢜ʢ޻ֶʣऔಘʢ೥ඈͼڃʣ ೥ɹ໺ଜ૯߹ݚڀॴೖࣾɺܦӦίϯαϧλϯτ ೥ɹϏδωεɾϒϨʔΫεϧʔେֶ।ڭतब೚ ೥ɹάϦʔ΁స৬ɻάϦʔγϯΨϙʔϧ্ཱͪ͛ γϯΨϙʔϧ࣌୅ ೥ɹ%JJYJΛγϯΨϙʔϧͰىۀ   ೥ɹ:PVSXJpΛγϯΨϙʔϧͰىۀ   ೥ɹ8"7&ίʔϫʔΩϯάεϖʔεΛόϦౡͰ૑ۀ   ೥ɹ#VUBIHF4JOHBQPSFʢҿ৯ళʣΛ+7Ͱ্ཱͪ͛   ೥ɹ1SPQFSUJ%BUBʢෆಈ࢈ϙʔλϧʣΛ্ཱͪ͛   ౦ژ࣌୅ ೥ɹ-BTU3PPUTΛ౦ژͰىۀ   ೥ɹ:PVSXJpΛόΠΞ΢τ ೥ɹ-BTU3PPUTΛΦ΢έΠ΢ΣΠϰͷࢠձࣾԽ ͦͯ͠ɺ೥݄ɺCBKKJΛ૑ۀ 

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3 ͜Ε·Ͱͷܦݧ ΞδΞͰ5ࣾ૑ۀ ೔ຊͰ2ࣾ૑ۀʢ2ࣾͱ΋ϒϩοΫνΣʔϯʣ 2ࣾόΠΞ΢τɺ2ࣾ౗࢈ ݱࡏ7ࣾ໨ͷ௅ઓத

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4 bajji ʢόοδʣͱ͸ ਓͱग़ձ͏ͨΊͷSNS

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5 ໊ࢗ 100೥ਐԽͷͳ͍ ςΫϊϩδʔ

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6 ͦͷਓͷྺ࢙ ܦݧ஋ ਓ͔Βͷ৴པ͕ ಁ͚ͯݟ͑Δ ໊ࢗΛΞοϓσʔτ͍ͨ͠

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7 ͔͜͜Βࢲͨͪ͸ԿΛಘͨͷͩΖ͏͔ʁ

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8 ΑΓܨ͕Γ΍͘͢ͳͬͨʁ ΑΓɺਓͱग़ձ͍΍͘͢ͳͬͨʁ

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9 ؆୯ʹ৘ใΛੈքʹ޿ΊΔ͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʁ

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10 Ͱ΋ɺࢲ͸͍·ɺ͔͜͜Β lࣗ෼͕ग़ձ͏΂͖ਓzΛݟ͚ͭΒΕͳ͍

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11 ͳͥͩΖ͏͔ʁ

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12 ແྉͰແ੍ݶ͔ͩΒ ϑΥϩʔ10ສਓ ΞϯνʁϑΝϯʁద౰ʁߪೖʁ

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13 ڞ௨ͷ༑ਓਓ ਌༑ ͍ܰ෇͖߹͍ Կ೥΋ίϯλΫτ͍ͯ͠ͳ͍ ࣮͸ձͬͨ͜ͱ΋ͳ͍ ෆ͔֬ա͗Δ͔Β

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14 ཤྺॻɺ-JOLFE*O ࣗ෼Ͱॻ͍͍ͯΔ ਅِ͕ෆ໌ɾɾɾ ࣗݾओு͚͔ͩͩΒ

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15 ໊ࢗΛΞοϓσʔτ͍ͨ͠ ϒϩοΫνΣʔϯͰ ՄࢹԽ ͦͷਓͷྺ࢙ ܦݧ஋ ਓ͔Βͷ৴པ͕ ಁ͚ͯݟ͑Δ

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16 ͲΕ͚ͩਓʹӨڹΛ ٴ΅͍ͯ͠Δ͔ ৴པͷূͷྔ ϦΞϧʹձ͏ ʹ ׆ಈྔ bajjiΛ ΋Β͏ bajjiΛ ଃΔ ΤϯΧ΢ϯτ ՄࢹԽ͢ΔͨΊͷ̏ͭͷύϥϝʔλʔ

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17 #MPDLDIBJO ϦΞϧͰձ͍ͬͯΔ࣌Ͱͳ͍ͱࠁΊͳ͍ ϦΞϧʹձ͏ ʹ ׆ಈྔ ΤϯΧ΢ϯτ

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18 ༗ྉɾ༗ݶʹ͢Δ͜ͱͰɺbajjiΛ৴པͷγϯϘϧʹ ແྉͰແ੍ݶ ϑΥϩʔ10ສਓ ΞϯνʁϑΝϯʁద౰ʁߪೖʁ ༗ྉͰ༗ݶ ੈلͷόοδ

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19 ʮݶΒΕͨʯ Λ୭ʹଃΔ͔ɾɾɾ #MPDLDIBJO bajjiΛ ΋Β͏ bajjiΛ ଃΔ

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20 ͜ͷਓͷࢤʹײ෰

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21 +PCTͷ࠶དྷͱࢥ͑Δ ΠϊϕʔςΟϒͳΞΠσΞΛ ࣋ͭਓ

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22 ͦͷλϑ͕͞ᚶ͍͠

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23 ࢲ͡Όಀ͛ग़ͯͨ͠ )"3%5)*/(4

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24 ͳΜͯɺඒ͍͠ίʔυΛ ॻ͘Μͩʂ ͓·͑͸ɾɾɾ

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25 ͓લͳΒɺͲ͏ʹ͔ͯ͘͠ΕΔ

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26 ͓લͷ4".63"* εϐϦοπΛ ିͯ͘͠Εʂ

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27 ظ଴ͷ৽ਓʂ

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28 ̍ͭ̍ͭͷ׆ಈΛϒϩοΫνΣʔϯʹࠁΉ ΤϯΧ΢ϯτ ϦΞϧʹձ͏ bajjiΛଃΔ bajjiΛ ΋Β͏ #MPDLDIBJO bsi = ∑ l we ij + ∑ m ˜ wim + ∑ n ˜ wni ਓੜͷܦݧ஋Λࢉग़

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29 bsi = ∑ l we ij + ∑ m ˜ wim + ∑ n ˜ wni ˜ wb ij = ∑ k wb ijk ˜ we ij = λe ij ⋅ ∑ k we ijk wb ijk = μk ⋅ λb ij we ijk = min ( 1, δe ijk 30 ) λb ijk = exp (ln(CPy ⋅ 365 / δb ijk ) ⋅ (1 − γij ) ⋅ Δγ) − 1 λe ij = exp (ln(CPy ⋅ 365 / δe ij ) ⋅ (1 − γe) ⋅ Δγ) − 1 μk = { ln(priceb k ) (if 0 < priceb k AND bk is sent) priceb k (if 0 < priceb k AND bk is received) γij = { σij (1 / rsij ) (if CPd < δb k ) 0 (otherwise) δb ijk = ⌊ tcurrent − tb ijk 86400 ⌋ − CPd (if 0 < δb k ) 1 (otherwise) δe ij = ⌊ tcurrent − te ij 86400 ⌋ − CPd (if 0 < δe ij ) 1 (otherwise) δe ijk = ⌊ te ijk − te ij(k−1) 86400 ⌋ (if 1 < k) ⌊ tcurrent − te ijk 86400 ⌋ (otherwise) rsij = ̂ εij + B ⋅ ̂ kij δe ij σij (x) = tanh ( x x + 1) bsi : bajji score of Ai (Ai : accounti ) rsij : relationship score between Ai and Aj B : bajji constant (B = 8.8) CPy : bajji critical point year (CPy = B) CPd : bajji critical point date (CPd = 10B) Δγ : Aging correction (Δγ = B/1,000) ̂ uεi : Number of encounters between Ai and unique users ̂ ug i : Number of bajjis sent from Ai to unique users ̂ uri : Number of bajjis received by Ai from unique users ̂ εi : Number of encounters between Ai and users ̂ gi : Number of bajjis sent from Ai to users ̂ ri : Number of bajjis received by Ai from users ˜ wij : Sum of the value of the bajji sent from Ai to Aj wijk : Value of the bajjik sent from Ai to Aj priceb k : Price of the bajjik tcurrent : Current datetime [sec] ̂ εij : Number of encounter between Ai and Aj ̂ kij : Number of bajji send Ai to Aj tb k : Datetime of the bajjik sent and received [sec] te ij : Datetime of the last encounter between Ai and Aj [sec] γe : Aging rate of encounter (γe = 0.0) γij : Aging rate between Ai and Aj δb k : Difference of days since the bajjik sent and received between Ai and Aj δe ij : Difference of days since the last encountered between Ai and Aj bajji ܦݧ஋ͷࢉग़ํ๏΋ެ։͠վળ͍ͯ͘͠ άϥϑཧ࿦ʢہॴภࡏੑΛߟྀͨ࣍͠਺ϕΫτϧத৺ੑཧ࿦ʣΛԠ༻

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30 bajji͸ɺιʔγϟϧάϥϑΛΞοϓσʔτ͠·͢ ݱࡏͷιʔγϟϧάϥϑ CBKKJΛߪೖ͠ɺଃΔ ఺ͱઢ͚ͩͷແ޲άϥϑ ॏΈ෇͖༗޲άϥϑ ແྉɾແ੍ݶ ༗ྉɾ༗ݶ ܨ͕ΓͷΈ ࣌ؒͷܦաɺස౓ɺଠ͞ɺ޲͖

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31 ϒϩοΫνΣʔϯ͔ͩΒσʔλΛϑΣΞͳঢ়ଶʹ อͭ͜ͱ͕Ͱ͖Δ

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32 ܦݧ஋ ʢي੻ɺح੻ʣ ܦݧ ΋Βͬͨ CBKKJ ΋Βͬͨ CBKKJͷ ྺ࢙ bajji ΩηΩ

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33 bajji͸༗ྉͰɺ༗ݶɺbajjiετΞͰߪೖ

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34 bajjiചΓ্͛ͷҰ෦Λɺ ܦݧ஋͕ߴ͍ʮΠϊϕʔλʔʯʹϦϫʔυͱͯ͠෼഑ CBKKJΛ ଃΔ גࣜձࣾbajji CBKKJΛߪೖ ʢҰ෦ແྉʣ bajji ܦݧ஋͕ ߴ͍ॱʹϦϫʔυ෼഑ = =

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35 ͋ͳͨͷ͋ͷؤுΓΛ஝ੵ͠ɺ ݟ͑ΔԽ͍ͨ͠

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36 ਓޱɿԯਓ ωοτɿ ສਓ &$ɺνϟοτɿ ສਓ 4/4ɿ ສਓ ϑϦʔϥϯεɾىۀՈ ελʔτΞοϓɺ෭ۀ ΦʔϓϯΠϊϕʔγϣϯ ΠϯϑϧΤϯαʔ ೥ ೥ʙ೥ ೥ʙ೥ bajji͸ࣗΒಈ͘ਓ͕λʔήοτ

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37 bajji ΩηΩ

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38 ਓੜͷܦݧ஋ΛՄࢹԽ͢Δ ৽͍͠SNS

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Confidential CBKKJͰ͸ɺCBKKJΛଃͬͨͱ͍͏ࣄ࣮ͷΈͰϒϩοΫνΣʔϯΛ׆༻ 39 CBKKJΛ ଃΔ גࣜձࣾbajji CBKKJΛߪೖ ϙΠϯτ bajjiܦݧ஋͕ ߴ͍ॱʹϦϫʔυ෼഑ = = τϥϯβΫγϣϯ Ϧϫʔυ ϙΠϯτ

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Confidential ϒϩοΫνΣʔϯͱτʔΫϯΤίϊϛʔͷ੗Έ෼͚ 40 CBKKJΛ ങ͏ τϥϯβΫγϣϯ Ϧϫʔυ ϙΠϯτ ϙΠϯτ ΫϨδοτ ܾࡁ ೔ࣦޮ ຊਓۜߦ ޱ࠲ ˇ 9 ೔ࣦޮ

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41 #MPDLDIBJO ϓϥΠϕʔτ ύϒϦοΫ ϒϩοΫ νΣʔϯ ʢ#5$ϕʔεʣ CBKKJͷߪೖ ΞΧ΢ϯτ؅ཧ ސ٬%#؅ཧ CBKKJΛଃͬͨ ࣄ࣮Λ τϥϯβΫγϣϯ ʹࠁΉ

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42 ΦʔϓϯΠϊϕʔγϣϯΛશ໘όοΫΞοϓ ࣗࣾʹͱͬͯඞཁͳݸਓͰಈ͘ΠϊϕʔλʔΛݟ͚ͭΒΕΔ اۀ bajji ΩηΩ

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43 ձࣾઃཱɺ࢝ಈ ЌWϦϦʔεʢجຊػೳʣ ЌWϦϦʔε ετΞػೳʣ ЌWϦϦʔε ຊਓೝূʣ ЌWϦϦʔε ۜߦޱ࠲ʣ WϦϦʔε ެࣜϦϦʔεʢ΢ΣϒΞϓϦʣ ੈքల։Λ։࢝ ϦϦʔεঢ়گͱ༧ఆ

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44 Ϊϑτ $$ Ϋϥ΢υιʔγϯά ϒϩοΫνΣʔϯ ΠϯηϯςΟϒ bajji ஹԁࢢ৔ ԯԁ ʢ֦େதʣ ֵ໋ͱ ݴΘΕ͍ͯΔ bajjiͷજࡏࢢ৔͸਺ઍԯԁن໛ʢ೔ຊͷΈͰʣ

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45 ঎ඪొ࿥ ɾbajjiʢग़ئࡁΈʣ ɾBUTAIʢग़ئࡁΈʣ ಛڐ ɾΤϯΧ΢ϯτػೳʢग़ئࡁΈʣ ɾϏδωεϞσϧΛ࣮ݱ͢Δٕज़ཁ݅ʢग़ئࡁΈʣ ಛڐɾ঎ඪొ࿥

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46 *OOPWBUPST/FUXPSL4FSWJDFT CBKKJMJGF 8FCΞϓϦͰఏڙத