bajji-191213.pdf

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1. 1 ݸਓͷ৴པΛՄࢹԽ͢Δ৽͍͠SNS גࣜձࣾbajji
2. 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#VUBIHF
   4JOHBQPSFʢҿ৯ళʣΛ+7Ͱ্ཱͪ͛ 
   ೥ɹ1SPQFSUJ%BUBʢෆಈ࢈ϙʔλϧʣΛ্ཱͪ͛ 
   ౦ژ࣌୅
   ೥ɹ-BTU3PPUTΛ౦ژͰىۀ 
   ೥ɹ:PVSXJpΛόΠΞ΢τ
   ೥ɹ-BTU3PPUTΛΦ΢έΠ΢ΣΠϰͷࢠձࣾԽ
   ͦͯ͠ɺ೥݄ɺCBKKJΛ૑ۀ 
3. 3 ͜Ε·Ͱͷܦݧ ΞδΞͰ5ࣾ૑ۀ ೔ຊͰ2ࣾ૑ۀʢ2ࣾͱ΋ϒϩοΫνΣʔϯʣ 2ࣾόΠΞ΢τɺ2ࣾ౗࢈ ݱࡏ7ࣾ໨ͷ௅ઓத
4. 4 bajji ʢόοδʣͱ͸ ਓͱग़ձ͏ͨΊͷSNS
5. 5 ໊ࢗ 100೥ਐԽͷͳ͍ ςΫϊϩδʔ
6. 6 ͦͷਓͷྺ࢙ ܦݧ஋ ਓ͔Βͷ৴པ͕ ಁ͚ͯݟ͑Δ ໊ࢗΛΞοϓσʔτ͍ͨ͠
7. 7 ͔͜͜Βࢲͨͪ͸ԿΛಘͨͷͩΖ͏͔ʁ
8. 8 ΑΓܨ͕Γ΍͘͢ͳͬͨʁ
   ΑΓɺਓͱग़ձ͍΍͘͢ͳͬͨʁ
9. 9 ؆୯ʹ৘ใΛੈքʹ޿ΊΔ͜ͱ͕Ͱ͖ΔΑ͏ʹͳͬͨʁ
10. 10 Ͱ΋ɺࢲ͸͍·ɺ͔͜͜Β
    lࣗ෼͕ग़ձ͏΂͖ਓzΛݟ͚ͭΒΕͳ͍
11. 11 ͳͥͩΖ͏͔ʁ
12. 12 ແྉͰແ੍ݶ͔ͩΒ ϑΥϩʔ10ສਓ ΞϯνʁϑΝϯʁద౰ʁߪೖʁ
13. 13 ڞ௨ͷ༑ਓਓ
    ਌༑
    ͍ܰ෇͖߹͍
    Կ೥΋ίϯλΫτ͍ͯ͠ͳ͍
    ࣮͸ձͬͨ͜ͱ΋ͳ͍ ෆ͔֬ա͗Δ͔Β
14. 14 ཤྺॻɺ-JOLFE*O
    ࣗ෼Ͱॻ͍͍ͯΔ
    ਅِ͕ෆ໌ɾɾɾ ࣗݾओு͚͔ͩͩΒ
15. 15 ໊ࢗΛΞοϓσʔτ͍ͨ͠ ϒϩοΫνΣʔϯͰ ՄࢹԽ ͦͷਓͷྺ࢙ ܦݧ஋ ਓ͔Βͷ৴པ͕ ಁ͚ͯݟ͑Δ
16. 16 ͲΕ͚ͩਓʹӨڹΛ
    ٴ΅͍ͯ͠Δ͔ ৴པͷূͷྔ ϦΞϧʹձ͏
    ʹ
    ׆ಈྔ bajjiΛ
    ΋Β͏ bajjiΛ
    ଃΔ ΤϯΧ΢ϯτ ՄࢹԽ͢ΔͨΊͷ̏ͭͷύϥϝʔλʔ
17. 17 #MPDLDIBJO ϦΞϧͰձ͍ͬͯΔ࣌Ͱͳ͍ͱࠁΊͳ͍ ϦΞϧʹձ͏
    ʹ
    ׆ಈྔ ΤϯΧ΢ϯτ
18. 18 ༗ྉɾ༗ݶʹ͢Δ͜ͱͰɺbajjiΛ৴པͷγϯϘϧʹ ແྉͰແ੍ݶ ϑΥϩʔ10ສਓ ΞϯνʁϑΝϯʁద౰ʁߪೖʁ ༗ྉͰ༗ݶ ੈلͷόοδ
19. 19 ʮݶΒΕͨʯ Λ୭ʹଃΔ͔ɾɾɾ #MPDLDIBJO bajjiΛ
    ΋Β͏ bajjiΛ
    ଃΔ
20. 20 ͜ͷਓͷࢤʹײ෰
21. 21 +PCTͷ࠶དྷͱࢥ͑Δ
    ΠϊϕʔςΟϒͳΞΠσΞΛ
    ࣋ͭਓ
22. 22 ͦͷλϑ͕͞ᚶ͍͠
23. 23 ࢲ͡Όಀ͛ग़ͯͨ͠ )"3%
    5)*/(4
24. 24 ͳΜͯɺඒ͍͠ίʔυΛ
    ॻ͘Μͩʂ
    ͓·͑͸ɾɾɾ
25. 25 ͓લͳΒɺͲ͏ʹ͔ͯ͘͠ΕΔ
26. 26 ͓લͷ4".63"*
    εϐϦοπΛ
    ିͯ͘͠Εʂ
27. 27 ظ଴ͷ৽ਓʂ
28. 28 ̍ͭ̍ͭͷ׆ಈΛϒϩοΫνΣʔϯʹࠁΉ ΤϯΧ΢ϯτ
    ϦΞϧʹձ͏ bajjiΛଃΔ bajjiΛ
    ΋Β͏ #MPDLDIBJO bsi = ∑ l we ij + ∑ m ˜ wim + ∑ n ˜ wni ਓੜͷܦݧ஋Λࢉग़
29. 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༻
30. 30 bajji͸ɺιʔγϟϧάϥϑΛΞοϓσʔτ͠·͢ ݱࡏͷιʔγϟϧάϥϑ CBKKJΛߪೖ͠ɺଃΔ ఺ͱઢ͚ͩͷແ޲άϥϑ ॏΈ෇͖༗޲άϥϑ ແྉɾແ੍ݶ ༗ྉɾ༗ݶ ܨ͕ΓͷΈ ࣌ؒͷܦաɺස౓ɺଠ͞ɺ޲͖
31. 31 ϒϩοΫνΣʔϯ͔ͩΒσʔλΛϑΣΞͳঢ়ଶʹ
    อͭ͜ͱ͕Ͱ͖Δ
32. 32 ܦݧ஋
    ʢي੻ɺح੻ʣ ܦݧ ΋Βͬͨ
    CBKKJ ΋Βͬͨ
    CBKKJͷ
    ྺ࢙ bajji ΩηΩ
33. 33 bajji͸༗ྉͰɺ༗ݶɺbajjiετΞͰߪೖ
34. 34 bajjiചΓ্͛ͷҰ෦Λɺ
    ܦݧ஋͕ߴ͍ʮΠϊϕʔλʔʯʹϦϫʔυͱͯ͠෼഑ CBKKJΛ ଃΔ
    גࣜձࣾ
    bajji CBKKJΛߪೖ
    ʢҰ෦ແྉʣ bajji ܦݧ஋͕
    ߴ͍ॱʹϦϫʔυ෼഑ = =
35. 35 ͋ͳͨͷ͋ͷؤுΓΛ஝ੵ͠ɺ ݟ͑ΔԽ͍ͨ͠
36. 36 ਓޱɿԯਓ ωοτɿ
    ສਓ &$ɺνϟοτɿ
    ສਓ 4/4ɿ
    ສਓ ϑϦʔϥϯεɾىۀՈ
    ελʔτΞοϓɺ෭ۀ
    ΦʔϓϯΠϊϕʔγϣϯ
    ΠϯϑϧΤϯαʔ ೥ ೥ʙ೥ ೥ʙ೥ bajji͸ࣗΒಈ͘ਓ͕λʔήοτ
37. 37 bajji ΩηΩ
38. 38 ਓੜͷܦݧ஋ΛՄࢹԽ͢Δ ৽͍͠SNS
39. Confidential CBKKJͰ͸ɺCBKKJΛଃͬͨͱ͍͏ࣄ࣮ͷΈͰϒϩοΫνΣʔϯΛ׆༻ 39 CBKKJΛ ଃΔ
    גࣜձࣾ
    bajji CBKKJΛߪೖ
    ϙΠϯτ bajjiܦݧ஋͕
    ߴ͍ॱʹϦϫʔυ෼഑ = = τϥϯβΫγϣϯ Ϧϫʔυ
    ϙΠϯτ
40. Confidential ϒϩοΫνΣʔϯͱτʔΫϯΤίϊϛʔͷ੗Έ෼͚ 40 CBKKJΛ ങ͏ τϥϯβΫγϣϯ Ϧϫʔυ
    ϙΠϯτ ϙΠϯτ ΫϨδοτ ܾࡁ ೔ࣦޮ ຊਓۜߦ
    ޱ࠲ ˇ 9 ೔ࣦޮ
41. 41 #MPDLDIBJO ϓϥΠϕʔτ ύϒϦοΫ
    ϒϩοΫ νΣʔϯ
    ʢ#5$ϕʔεʣ CBKKJͷߪೖ
    ΞΧ΢ϯτ؅ཧ
    ސ٬%#؅ཧ CBKKJΛଃͬͨ
    ࣄ࣮Λ
    τϥϯβΫγϣϯ ʹࠁΉ
42. 42 ΦʔϓϯΠϊϕʔγϣϯΛશ໘όοΫΞοϓ
    ࣗࣾʹͱͬͯඞཁͳݸਓͰಈ͘ΠϊϕʔλʔΛݟ͚ͭΒΕΔ اۀ bajji ΩηΩ
43. 43 
    
    
    
    
    
    
    
    
    
    ձࣾઃཱɺ࢝ಈ
    
    
    
    
    ЌWϦϦʔεʢجຊػೳʣ
    
    
    
    
    
    
    ЌWϦϦʔε
    ετΞػೳʣ
    
    
    
    
    ЌWϦϦʔε
    ຊਓೝূʣ
    
    
    
    
    ЌWϦϦʔε
    ۜߦޱ࠲ʣ
    
    
    
    WϦϦʔε
    
    
    
    
    
    
    
    
    ެࣜϦϦʔεʢ΢ΣϒΞϓϦʣ
    
    
    
    
    
    
    
    
    
    
    
    
    ੈքల։Λ։࢝ ϦϦʔεঢ়گͱ༧ఆ
44. 44 Ϊϑτ $$
    Ϋϥ΢υιʔγϯά ϒϩοΫνΣʔϯ
    ΠϯηϯςΟϒ bajji ஹԁࢢ৔ ԯԁ
    ʢ֦େதʣ ֵ໋ͱ
    ݴΘΕ͍ͯΔ bajjiͷજࡏࢢ৔͸਺ઍԯԁن໛ʢ೔ຊͷΈͰʣ
45. 45 ঎ඪొ࿥ ɾbajjiʢग़ئࡁΈʣ ɾBUTAIʢग़ئࡁΈʣ ಛڐ ɾΤϯΧ΢ϯτػೳʢग़ئࡁΈʣ ɾϏδωεϞσϧΛ࣮ݱ͢Δٕज़ཁ݅ʢग़ئࡁΈʣ ಛڐɾ঎ඪొ࿥
46. 46 *OOPWBUPST
    /FUXPSL
    4FSWJDFT CBKKJMJGF 8FCΞϓϦͰఏڙத