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recommendation system with document similarity
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yoppi
January 27, 2018
Programming
0
3.1k
recommendation system with document similarity
yoppi
January 27, 2018
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Transcript
จॻؒྨࣅʹΑΔ ϨίϝϯυγεςϜ !ZPQQJCMPH։ൃ෦6;06 4QFFF,BJHJ
ࣗݾհ w !ZPQQJCMPHٛాതҰ w 4QFFFྺϲ݄ͪΐͬͱ%$6;06 w (PϦϦʔεΊͰ͍ͨ w γεςϜϓϩάϥϛϯά͕େ w
ےτϨ
͡Ίʹ w ωΠςΟϒΞυωοτϫʔΫͰ͋Δ6;06ϨίϝϯυΟδΣο τΛఏڙ͍ͯ͠Δ w ϝσΟΞͷهࣄͱࠂओ͔Βೖߘ͞ΕͨࠂͦΕͧΕΛΟδΣο τͰϨίϝϯυ
Ϩίϝϯυهࣄ Ϩίϝϯυࠂ هࣄ
͕ɺهࣄϨίϝϯυͷਫ਼͕Α͘ͳ͍ʢ$53͕͍ʣঢ়ଶͩͬͨ
T
ΞϧΰϦζϜ͕ద༻͞Εͳ͍ϥϯμϜΑΓ͍ɻɻɻ
σΟϨΫλʔʮࠓिதʹهࣄCTR্͓ئ͍͠·͢ʯ yoppiʮ;͊ͬʂʁʢ3͘Β͍͔͠ͳ͍ʂʁʣʯ σΟϨΫλʔʮʢʹͬ͜Γʣʯ yoppiʮɺ͍…ʯ ͱ͍͏͜ͱͰͳΔ͘ޙʑͷվળՄೳʹ͢ΔͨΊʹίΞػೳΛ γϯϓϧʹ࡞ΓͭͭCTR্ΛݟࠐΊΔվળΛ͢Δ͜ͱʹ
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
࣍
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
l͋ΔϢʔβ͕ڵຯΛ࣋ͭͱࢥΘΕΔใΛਪન͢Δz
࣮ํ๏ w ڠௐϑΟϧλϦϯά w ίϯςϯπϕʔε
ڠௐϑΟϧλϦϯάͰͷϨίϝϯυ w ʮίϯςϯπʹର͢ΔϢʔβͷධՁʯΛݩʹϨίϝϯυ͢Δ w ΞΫηεཤྺɺߪങཤྺɺϨϏϡʔείΞ w ίϯςϯπࣗମͷσʔλͰͳ͘ϢʔβධՁΛΑΓڧ͍ॏΈͱ͠ ͯଊ͑Δ&$ͰΑ͘ΘΕΔ
ίϯςϯπϕʔεͷϨίϝϯυ w ʮίϯςϯπࣗମͷσʔλʯΛݩʹϨίϝϯυ͢Δ w ίϯςϯπͷλΠτϧɺຊจɺΧςΰϦɺը૾ w Ϣʔβσʔλ͕গͳ͍ঢ়ଶͰϨίϝϯυ͍ͨ͠߹ɺϝσΟΞͰ هࣄΛਪન͢Δ߹ʹΘΕΔ
ࠓճ͢͜ͱ w ڠௐϑΟϧλϦϯά w ίϯςϯπϕʔε
ίϯςϯπϕʔεͰهࣄΛϨίϝϯυ͢Δ w ʮจॻಉ͕࢜ࣅ͍ͯΕϢʔβڵຯΛ࣋ͭͰ͋Ζ͏ʯͱ͍͏Ծ ఆΛݩʹهࣄΛϨίϝϯυ͢Δ w ਓ͕ؒݟΔͱͳΜͱͳ͘ࣅͯΔͬͯஅͰ͖Δ w ܭࢉػͲ͏ͬͯஅ͢ΔͷͩΖ͏͔ʁ
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
จॻؒྨࣅ w จॻؒͰʮͳΜͱͳ͘ࣅ͍ͯΔʯͷΛද͢ईΛԽͨ͠ ͷ w ͦͷईΛྨࣅʢTJNJMBSJUZʣͱݺͿ w ྫ͑ɺʮྨࣅ͕ߴ͍ͷΛࣅ͍ͯΔʯͱఆٛ͢Εܭࢉػ ͦͷ͔Βࣅ͍ͯΔ͔ࣅ͍ͯͳ͍͔ΛஅͰ͖Δ w
ͦͷईΛଌΔํ๏͕͍͔ͭ͘ఏএ͞Ε͍ͯΔ w ϕΫτϧۭؒϞσϧ w ใݕࡧʢ*3ʣ
ϕΫτϧۭؒϞσϧ w จॻதͷग़ݱ୯ޠΛϕΫτϧͱΈͳͯ͠ʢ͍͍ͩͨʣ5'*%'Λ ϕΫτϧʹ༻͍ͯɺίαΠϯੵͳͲΛܭࢉͯ͠ྨࣅΛܭ ࢉ͢Δ
ϕΫτϧۭؒϞσϧ w $PTJOFྨࣅ w +BDDBSEྨࣅ w %JDFྨࣅ w 0WFSMBQྨࣅ
ใݕࡧʢ*OGPSNBUJPO3FUSJFWBMʣ w େྔͷใʢจॻʣ͔ΒతʢΫΤϦʣʹ߹கͨ͠ͷΛऔΓग़ ͢ w จॻؒͰͷྨࣅͱΈͳ͢߹ɺϨίϝϯυରͱͳΔจॻதͷ ୯ޠΛΫΤϦͱΈͳͯ͠จॻू߹ʹରͯ͠ݕࡧ͢Δ
ใݕࡧʢ*OGPSNBUJPO3FUSJFWBMʣ w #. w &MBTUJDTFBSDIʢ-VDFOFʣͷσϑΥϧτͷྨࣅܭࢉͷϞσϧ ʹ༻͞Ε͍ͯΔ w ϊΠζͷϕΫτϧ͕ͱͯখ͘͞ධՁ͞ΕΔͷͰTUPQXPSET ͳͲΛνϡʔχϯά͠ͳͯ͘σϑΥϧτͰͦͦ͜͜ͳਫ਼ʹ ͳΔ
None
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
6;06ͷهࣄϨίϝϯυγεςϜ w ίϯςϯπϕʔεͷϨίϝϯυΛ࠾༻ w هࣄ͔ΒಛྔΛநग़ w ϕΫτϧۭؒϞσϧΛ࠾༻ w 0WFSMBQྨࣅʹࣅͨͷ w
هࣄʹର͢ΔهࣄϨίϝϯυ܊Λੜ
ϝσΟΞ ࠂओ ৴αʔόܭଌαʔό ࠂϦΫΤετ ࠂϨεϙϯε ίϯόʔδϣϯ௨ ৴ީิσʔλ ৴σʔλੜόον σʔλΣΞϋε ৴ϩά
3%# όονॲཧ ཧը໘ ৴࣮σʔλ
ίϯςϯπϕʔεΛ࠾༻ͨ͠ܦҢ w ڠௐϑΟϧλϦϯάʢେྔͷʣϢʔβ͕͋ΔఔίϯςϯπΛ ८ճ͢Δঢ়ଶͰͳ͍ͱσʔλ͔ΒϨίϝϯυ͠ʹ͍͘ w ڠௐϑΟϧλϦϯάϩϯάςʔϧʹޮ͖͘͢ɺ&$ͳΒ୯Ձ͕ ߴ͍ͷͰϩϯάςʔϧ෦·ͰΧόʔͰ͖Δͷ༗ҙٛ w 6;06ͷΑ͏ͳωΠςΟϒΞυͩͱภΓ͕͋Δʢདྷ๚ऀ͕ճͰऴ ΘΔ͜ͱ͕ଟ͍ʣ
w ͜ͷΑ͏ͳঢ়گԼͰͱͱ୯Ձ͋ͨΓऩӹ͕͍ͷͰϩϯά ςʔϧ෦ʹ͋·Γࢫຯ͕ͳ͍ʢͱࢥ͏ʣ
ಛྔΛຊจ͔Βநग़͢Δ w λΠτϧ͕Ұ൪ಛΛอ͍࣋ͯ͠Δͣ w ਓ͕ؒλά͚͍ͯ͠Δͱݴ͍͑ͯྑ͍ w ຊจશͯΛ͏ͱϊΠζ͕ଟ͘ͳΔ w ॳظ࣮͕࠾༻ʢTJNJMBSJUZʣ w
ຊจͷจΛ࠾༻ w ಛʹ8FCϝσΟΞͰϢʔβʹ͍࣌ؒͰಡΜͰΒ͏ͨΊʹจ ʹཁ͞Εͨͷ͕ॻ͔Ε͍ͯΔ͜ͱ͕ଟ͍ w χϡʔεܥϝσΟΞݦஶ w ʮจॻཁʯͷͰจΛಛྔܭࢉͷࡍʹॏΈΛڧͯ͘͠ܭ ࢉ͢Δํ๏͕Α͘ݟΒΕΔ
ͦͬͱแΜͰϞϛϞϛ ৴ݰṷͷਖ਼͍͠৯ํ͕ʜ ࢁསͷදతͳ՛ʮ٥伷৴ݰṷʯख࡞ΓͷຯΘ͍ʹ ͩ͜Θ͓ͬͨṷͱ͍͖߳͠ͳคɺೱްͳࠇຶ͕ͨͬ Γೖ͍ͬͯ·͢ɻಛͷࠇຶΛ͔͚ͯ৯Δॠؒ ͳΜͱݴ͑ͳ͍ͤʹแ·Εɺ΄ͬͱҰଉ͖ͭͨ͘ ͳΔͰ͠ΐ͏ɻ࣮٥伷৴ݰṷΛϞνʔϑʹͨ͠େਓ ؾͷʮ৴ݰṷεΠʔπʯ͕͍͔ͭ͋͘Γ·͢ɻͬͦ͞ ͘հ͠·͠ΐ͏ʂʮ৴ݰṷιϑτʯɺ͖ͳคͱೱ
ްͳࠇຶ͕ͨͬΓ͔͔ͬͨ٥伷৴ݰṷͱιϑτΫϦʔ Ϝ͕ίϥϘϨʔγϣϯͨ͠ཉுΓͳ߹ͤɻόχϥΞ Πε͕ઈົʹΈ߹Θͬͨ͞༸ંͷΫηʹͳΔຯ ɺ͔ͳΓ᩵ͳεΠʔπʹ্͕͍ͬͯ·͢ɻࢁས ͷ٥伷ຊࣾʹ͋ΔΞτϨοτɺࢁསݝథਧ ࢢͷதԝߴಓ࿏ऍᷟಊύʔΩϯάΤϦΞͰ৯ ΒΕΔͦ͏Ͱ͢ɻʜ
ͦͬͱแΜͰϞϛϞϛ ৴ݰṷͷਖ਼͍͠৯ํ͕ʜ ࢁསͷදతͳ՛ʮ٥伷৴ݰṷʯख࡞ΓͷຯΘ͍ʹ ͩ͜Θ͓ͬͨṷͱ͍͖߳͠ͳคɺೱްͳࠇຶ͕ͨͬ Γೖ͍ͬͯ·͢ɻಛͷࠇຶΛ͔͚ͯ৯Δॠؒ ͳΜͱݴ͑ͳ͍ͤʹแ·Εɺ΄ͬͱҰଉ͖ͭͨ͘ ͳΔͰ͠ΐ͏ɻ࣮٥伷৴ݰṷΛϞνʔϑʹͨ͠େਓ ؾͷʮ৴ݰṷεΠʔπʯ͕͍͔ͭ͋͘Γ·͢ɻͬͦ͞ ͘հ͠·͠ΐ͏ʂʮ৴ݰṷιϑτʯɺ͖ͳคͱೱ
ްͳࠇຶ͕ͨͬΓ͔͔ͬͨ٥伷৴ݰṷͱιϑτΫϦʔ Ϝ͕ίϥϘϨʔγϣϯͨ͠ཉுΓͳ߹ͤɻόχϥΞ Πε͕ઈົʹΈ߹Θͬͨ͞༸ંͷΫηʹͳΔຯ ɺ͔ͳΓ᩵ͳεΠʔπʹ্͕͍ͬͯ·͢ɻࢁས ͷ٥伷ຊࣾʹ͋ΔΞτϨοτɺࢁསݝథਧ ࢢͷதԝߴಓ࿏ऍᷟಊύʔΩϯάΤϦΞͰ৯ ΒΕΔͦ͏Ͱ͢ɻʜ Ϟσϧ࡞ʹར༻
ܗଶૉղੳ w .F$BCΛ࠾༻ w ࣙॻOFPMPHEΛ࠾༻ w IUUQTHJUIVCDPNOFPMPHENFDBCJQBEJDOFPMPHE w 8JLJQFEJBΛϕʔεʹ࡞ΒΕ͍ͯΔ w
8FCϝσΟΞʹରͯ͠εϥϯάΛೝࣝͯ͘͠ΕΔͷͰ༗༻ w TUPQXPSETϝσΟΞຖʹ࠷దԽ͍ͯ͠ͳ͍ w ͋Δఔ͜ΕෆཁͩΖ͏ͱ͍͏ͷΛࣗಈతʹ͍ͯͬͯ͠ ͍Δ
Ϟσϧ࡞ w 0WFSMBQྨࣅΛϕʔεʹͨ͠୯७ͳϞσϧ w 5'ɾ*%'ΛॏΈͱͯ͠ܭࢉ͢Δ͚ͩ w $PTJOFྨࣅΛॳظ࣮ʹద༻ͯͦ͜͠·Ͱ͋Δ݁ՌΛ ಘΒΕͳ͔ͬͨ
ద༻݁Ռ w 6;06Λಋೖ͍ͯ͠ΔશϝσΟΞʹద༻͠ɺ΄΅શͯͷϝσΟΞͰ هࣄ$53ͷ্Λୡ w ճ༡େ෯ʹ্
None
T
None
None
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
͞ΒͳΔվળҊ w Ϟσϧͷ্ w ͘Β͍Ͱ࡞Γग़ͨ͠ͳΜͪΌͬͯϞσϧͳͷͰਫ਼͕͍͍ͱ ͞Ε͍ͯΔ#.0.CBTFEΛݕূͯ͠Έ͍ͨ w ϝσΟΞຖͷಛྔநग़ͷ্ w ݱࡏຊจ͔Βͷಛྔநग़શϝσΟΞಉ༷ͳͷͰݸʑͷϝσΟ
ΞͰΑΓదͳநग़ํ๏Λݕ౼͢Δ w ଟόϯσΟοτΛద༻ w ΫϦοΫͨ͠ɺ͍ͯ͠ͳ͍ɺͷͱͳΔͷͰ֬ϕϧ ψʔΠͱͳΓଟόϯσΟοτΛద༻Ͱ͖ΔͷͰ͜Ε Λղ͘͜ͱͰϞσϧͷߋ৽͕ՄೳʹͳΔ
• Ϩίϝϯυͬͯʁ • จॻؒྨࣅ • UZOUͰͷద༻ྫ • ͞ΒͳΔվળҊ • ·ͱΊ
·ͱΊ w ίϯςϯπϕʔεͰͷϨίϝϯυͰ$53Λେ෯ʹ͋͛ΒΕͨ w ʮจॻಉ͕࢜ࣅ͍ͯΕϢʔβڵຯΛ࣋ͭͰ͋Ζ͏ʯͱ͍͏ Ծఆ͕ূ໌͞Εͨͱ͍͑Δ w ෳࡶͳϞσϧΛ༻͍ͣͱಛྔͷநग़ஈ֊Ͱ͋Δఔ͠΅Δ͜ ͱͰਫ਼Λग़ͤΔ w
γϯϓϧʹίΞ෦Λ࡞Δ͜ͱͰࠓޙͷվྑͷํཱ͕͍ͯ͢