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ハンドメイド作品を対象としたECサイトにおける単語の出現頻度を用いた稀覯品の検出 / Detection of Rare Works Using Term Frequency on Electronic Commerce Site for Trading Handmade Works

ハンドメイド作品を対象としたECサイトにおける単語の出現頻度を用いた稀覯品の検出 / Detection of Rare Works Using Term Frequency on Electronic Commerce Site for Trading Handmade Works

情報処理学会第49回インターネットと運用技術研究会での発表資料です。

Komei Nomura

May 15, 2020
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  1. ໺ଜ޸໋(ϖύϘݚڀॴ), ࡾ୐༔հ(ϖύϘݚڀॴ)
    2020.05.15 ୈ89ճCSECୈ49ճIOT߹ಉݚڀൃදձ
    ϋϯυϝΠυ࡞඼Λର৅ͱͨ͠ECαΠτʹ
    ͓͚Δ୯ޠͷग़ݱස౓Λ༻͍ͨك᧵඼ͷݕग़

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  2. 1. ݚڀͷഎܠͱ໨త
    2. ك᧵඼ͷݕग़ͱͦͷ՝୊
    3. ఏҊख๏
    4. ධՁ
    5. ·ͱΊͱࠓޙͷ՝୊
    2
    ໨࣍

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  3. 1.
    ݚڀͷഎܠͱ໨త

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  4. • ϋϯυϝΠυ࡞඼Λѻ͏CtoCͷECαΠτͷྲྀ௨ֹ͸૿Ճ͍ͯ͠Δ
    • ϋϯυϝΠυ࡞඼͸ɺσβΠϯ΍੍࡞͕ख࡞ۀͰߦΘΕͨ΋ͷͰ͋ΔͨΊɺ

    ࡞඼ͷرগੑ΍ಠ૑ੑ͕Ձ஋ͷҰ୺ͱͳ͍ͬͯΔ
    • ӡӦऀ͸ɺرগੑ΍ಠ૑ੑ͕͋Δ௝͍͠࡞඼ʢك᧵඼ʣͷൃݟʹऔΓ૊Ή
    • ൢചͷଅਐ΍ݕࡧੑͷ޲্ʹར༻
    4
    ݚڀͷഎܠ

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  5. 5
    ك᧵඼
    యܕతͳ࡞඼ ك᧵඼
    ࡞඼λΠτϧ
    7SJKIJFEϝϯζɹࡒ෍ɹೋͭંΓɹຊֵ
    ৬ਓ͕ख࡞ΓϓϨθϯτΧʔϑϨβʔ
    จݿֵʮ೔ຊͷࠛ஬γϦʔζʯೋͭ
    ંΓࡒ෍ΞόϯΪϟϧυ࠼৭WFS
    ը૾
    • ϋϯυϝΠυ࡞඼Λѻ͏ECαΠτʮminneʯʹ͓͚Δయܕతͳ࡞඼ͱك᧵඼
    • ك᧵඼͸رগੑ΍ಠ૑ੑ͕͋Δ௝͍͠࡞඼

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  6. • ൢചͷଅਐ
    • ϋϯυϝΠυ࡞඼Λѻ͏ECαΠτʹ͸ɺ࡞඼ʹرগੑ΍ಠ૑ੑΛٻΊΔར
    ༻ऀ͕ଘࡏ͢Δ
    • ͜ͷΑ͏ͳར༻ऀʹرগੑ΍ಠ૑ੑ͕༏Εͨك᧵඼Λ঺հ͢Δ͜ͱͰɺߪ
    ೖ཰ͷ޲্͕ظ଴͞ΕΔ
    • ϋϯυϝΠυ࡞඼ಛ༗ͷൢചଅਐͷޮՌ͕ߴ͍࡞඼͕ଘࡏ͢Δ
    6
    ك᧵඼ͷ༻్ᶃ

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  7. • ݕࡧੑͷ޲্
    • ECαΠτͰ͸࡞඼ʹڞ௨͢Δಛੑຖʹ෼ྨͨ͠ΧςΰϦΛ࡞඼ʹઃఆ͢Δ
    • ΧςΰϦͷઃఆ͕ద੾Ͱͳ͍৔߹͕͋ΔͨΊɺΧςΰϦؒҧ͍ͷ࡞඼Λൃ
    ݟ͠मਖ਼͢Δ͜ͱͰݕࡧੑͷ޲্͕ظ଴Ͱ͖Δ
    • ك᧵඼ʹ͸ɺ࡞඼ू߹ʹ͓͍ͯرগੑ΍ಠ૑ੑͷ౓߹͍͕ߴ͗͢Δ΋ͷ͕
    ͋Δ

    ˠ ͜ͷΑ͏ͳ࡞඼͸ΧςΰϦؒҧ͍ͷ࡞඼Ͱ͋ΔՄೳੑ͕ߴ͍
    7
    ك᧵඼ͷ༻్ᶄ

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  8. 8
    ݚڀͷ໨త
    • ޮ཰Α͘ك᧵඼Λൃݟ͢ΔͨΊʹɺ࡞඼ू߹͔Βك᧵඼Λݕग़͠ɺݕग़ͨ͠ك
    ᧵඼Λ෼ྨ͢Δ
    ك᧵඼
    શ࡞඼
    యܕతͳ࡞඼ ΧςΰϦؒҧ͍ͷ࡞඼
    ൢചଅਐͷޮՌ͕ߴ͍࡞඼
    PS

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  9. 2.
    ك᧵඼ͷݕग़ͱͦͷ՝୊

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  10. • ك᧵඼ͷൃݟʹ͸ɺ࡞඼ू߹ʹڞ௨͢Δಛੑ͔Βయܕతͳ࡞඼ΛٻΊɺ͜ΕΒ
    ͕࣋ͨͳ͍௝͍͠ಛੑ͕͋Δ࡞඼Λ୳͢ඞཁ͕͋Δ
    10
    ك᧵඼ͷൃݟ
    ك᧵඼
    શ࡞඼
    యܕతͳ࡞඼

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  11. • ك᧵඼ͷ൑அج४͸࡞඼ू߹͝ͱʹҟͳΔ
    • ࡞඼ू߹͝ͱʹڞ௨͢Δಛੑ͸ҟͳΓɺయܕతͳ࡞඼΋ҟͳΔ
    11
    ك᧵඼ͷൃݟͷ՝୊
    ࡞඼ͷछྨ͕ଟ༷Ͱ͔ͭܧଓతʹมԽ͢ΔECαΠτͰ͸ɺ࡞඼ू߹ʹڞ௨͢Δಛੑ
    ΛखಈͰݸผʹٻΊͣك᧵඼Λݕग़͍ͨ͠

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  12. • ར༻ऀͷධՁʢߪೖཤྺͳͲʣΛ༻͍Δҙ֎ੑΛॏࢹͨ͠ਪનख๏
    • ະ஌ͷ৘ใ΍ҙ֎ͳ৘ใΛఏڙ͢Δ͜ͱʹΑΔར༻ऀͷຬ଍౓ͷ޲্͕໨త
    • ར༻ऀ͕ݟͨ͜ͱͳ͍࡞඼Λఏࣔ͢Δ͜ͱ͕ҙ֎ੑͷ৚݅ͱͯ͠ॏཁ
    • ك᧵඼͸࡞඼ू߹ͷయܕతͳ࡞඼ʹൺ΂਺͕গͳ͘ɺଟ͘ͷਓ͕໨ʹ͍ͯ͠ͳ
    ͍Մೳੑ͕ߴ͍
    12
    ك᧵඼ݕग़ͷؔ࿈ݚڀᶃ
    ҙ֎ੑΛॏࢹͨ͠ਪનख๏ʹΑͬͯɺ࡞඼ू߹ʹڞ௨͢ΔಛੑΛखಈͰݸผʹ
    ٻΊͣك᧵඼Λݕग़Ͱ͖Δ
    Kotkov, D., Wang, S. and Veijalainen, J.: A survey of serendipity in recommender systems, Knowledge-Based Systems, Vol. 111, pp. 180–192 (2016).


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  13. • ར༻ऀͷධՁ͕ͳ͍࡞඼͸ݕग़ͷର৅֎
    • ϋϯυϝΠυ࡞඼Λѻ͏CtoCͷECαΠτʹ͸೔ʑ৽͍͠࡞඼͕௥Ճ͞Εɺ͜
    ΕΒͷ࡞඼ʹ͸ར༻ऀͷධՁ͕ͳ͍ظ͕ؒ͋Δ
    • ӡӦऀ͸ൢചଅਐ΍ݕࡧੑͷ޲্ʹͭͳ͕Δ࡞඼Λޮ཰Α͘ଟ͘ൃݟ͍ͨ͠
    13
    ك᧵඼ݕग़ͷؔ࿈ݚڀᶃͷ՝୊
    ར༻ऀͷධՁ͕ͳ͍࡞඼Λݕग़ର৅ʹؚΊΔ͜ͱ͕๬·͍͠

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  14. • ౤ߘܕͷྉཧͷϨγϐαΠτ͔Β௝͍͠ϨγϐΛநग़͢Δख๏
    • ͋Δྉཧʹ͸͋·Γར༻͞Εͳ͍͕ɺͦͷଞͷྉཧͰ͸සൟʹར༻͞ΕΔ৯ࡐ
    ΛٻΊʢTF-IDFΛԠ༻ʣɺ͜ͷ৯ࡐ͔Β௝͍͠ϨγϐΛநग़͢Δ
    • ྉཧΛ࡞඼ू߹ɺϨγϐΛ࡞඼ͱଊ͑Δ͜ͱͰك᧵඼ͷݕग़ʹԠ༻Մೳ
    • ར༻ऀͷධՁ͸ඞཁͳ͍͕ɺݕग़ͨ͠ك᧵඼Λ༻్ผʹ෼ྨ͢Δ͜ͱ͕Ͱ͖ͳ͍
    14
    ك᧵඼ݕग़ͷؔ࿈ݚڀᶄͱͦͷ՝୊
    ຊݚڀͰ͸ɺك᧵඼Λ༻్ผʹ෼ྨ͢Δج४΋ඞཁ
    ஑৲ګհ, ਗ਼༤Ұ, த઒ത೭, ాݪ߁೭, େਢլত඙: ҙ֎ੑͷ͋ΔϨγϐΛਪન͢ΔΤʔδΣϯτͷఏҊ, ిࢠ৘ใ௨৴ֶձ࿦จࢽ D, Vol. 98, No. 6, pp. 971–981 (2015).


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  15. 3.
    ఏҊख๏

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  16. 1. ࡞඼ू߹ʹΑͬͯڞ௨͢Δಛੑ͕ҟͳΓك᧵඼ͷ൑அج४΋ҟͳΔ
    ɹˠ ࡞඼ू߹ʹڞ௨͢ΔಛੑΛखಈͰݸผʹٻΊͳ͍΄͏͕๬·͍͠
    2. ར༻ऀͷධՁ͕ͳ͍࡞඼͸ݕग़ର৅֎
    ɹˠ ΑΓଟ͘ͷك᧵඼Λݕग़͢ΔͨΊʹɺະධՁͷ࡞඼΋ݕग़ର৅ͱ͢Δ
    3. ك᧵඼Λ༻్ผʹ෼ྨ͢Δج४͕ͳ͍
    ɹˠ ك᧵඼Λ༻్ผʹ෼ྨ͢Δج४Λݟग़͢
    16
    ՝୊ͷ੔ཧ

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  17. • ࡞඼ू߹ʹ͓͚Δ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷग़ݱස౓Λई౓ʹઃఆ͠ɺ͜
    ͷई౓͕૬ରతʹ௿͍࡞඼Λك᧵඼ͱͯ͠ݕग़
    • ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷग़ݱස౓ͷඪ४ภࠩΛ༻͍ͯك᧵඼Λ༻్ผʹ
    ෼ྨ
    17
    ఏҊख๏
    ୯ޠͷग़ݱස౓
    ͷࢉग़
    ࡞඼ू߹ ك᧵඼ͷݕग़ ك᧵඼ͷ෼ྨ
    ൢചଅਐͷޮՌ͕ߴ͍࡞඼
    ΧςΰϦؒҧ͍ͷ࡞඼
    ར༻ऀͷධՁʹґଘ͠ͳ͍ ࡞඼ू߹ʹڞ௨͢ΔಛੑΛࣗಈͰٻΊΔ
    ෼ྨج४Λઃఆ

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  18. • ࡞඼λΠτϧʹରͯ͠ܗଶૉղੳΛద༻͠୯ޠΛநग़
    • ୯ޠͷग़ݱස౓ͷ௿͞Λද͢஋ͱͯ͠ɺTF-IDFʹ͓͚ΔIDFΛར༻
    • IDF͸શจॻͷ͏ͪɺ͋Δ୯ޠؚ͕·ΕΔจॻ਺ͷٯ਺
    • ࡞඼λΠτϧΛจॻͱͯ͠ద༻
    18
    ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷग़ݱස౓ͷࢉग़
    Ndoc
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    ɿશจॻ਺
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
    ɿ୯ޠ͕ग़ݱ͢Δจॻ਺
    t
    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
    IDF(t) = log
    Ndoc
    df(t)
    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

    View Slide

  19. • ࡞඼ͷλΠτϧʹؚ·ΕΔ୯ޠͷIDFͷ্ҐN݅ͷ߹ܭΛ࡞඼ͷධՁ஋ͱͯ͠
    ܭࢉ͠ɺධՁ஋͕ߴ͍࡞඼Λك᧵඼ͱͯ͠ݕग़
    • N͸࡞඼͕΋ͭ୯ޠ਺ʹؔ܎ͳ͘࡞඼ͷධՁ஋ΛٻΊΔͨΊʹઃఆ
    • ୯ޠ਺͕Nະຬͷ࡞඼͸ݕग़ͷର৅֎
    19
    ك᧵඼ͷݕग़
    E(w)
    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    AAACZnichVHLSsNAFD2N7/poVUTBTbEorsqNCIqrohuX2qegpSRxrKFpEpK0Uos/ILjVhSsFEfEz3PgDLvoHissKblx4mwZEi3qHmTlz5p47Z2ZU29Bdj6gZknp6+/oHBofCwyOjY5Ho+ETOtaqOJrKaZVjOjqq4wtBNkfV0zxA7tiOUimqIvFreaO/na8JxdcvMeHVbFCpKydQPdE3xmEpnikfFaJwS5EesG8gBiCOILSt6iz3sw4KGKioQMOExNqDA5bYLGQSbuQIazDmMdH9f4ARh1lY5S3CGwmyZxxKvdgPW5HW7puurNT7F4O6wMoZ5eqI7atEj3dMLffxaq+HXaHup86x2tMIuRk5n0u//qio8ezj8Uv3p2cMBVn2vOnu3faZ9C62jrx1ftNJrqfnGAl3TK/u/oiY98A3M2pt2sy1SlwjzB8g/n7sb5JYSMiXk7eV4cj34ikHMYg6L/N4rSGITW8jyuSWc4RwXoWdpTJqSpjupUijQTOJbSLFPpjOKvg==
    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
    N
    AAACZHichVHLSsNAFD2Nr1qrVosgCFIsiqtyI4LiSnTjSqy1D6ilJHHUYJqEJC1o8Qd0q7hwpSAifoYbf8BFf0AQlxXcuPA2DYgW9Q4zc+bMPXfOzKi2obseUSMkdXX39PaF+yMD0cGh4djIaM61qo4mspplWE5BVVxh6KbIerpniILtCKWiGiKvHqy29vM14bi6ZW55h7YoVZQ9U9/VNcVjKr1ejiUpRX4kOoEcgCSC2LBit9jGDixoqKICARMeYwMKXG5FyCDYzJVQZ85hpPv7AseIsLbKWYIzFGYPeNzjVTFgTV63arq+WuNTDO4OKxOYpie6oyY90j290Mevtep+jZaXQ57VtlbY5eGT8cz7v6oKzx72v1R/evawi0Xfq87ebZ9p3UJr62tHF83M0uZ0fYau6ZX9X1GDHvgGZu1Nu0mLzUtE+APkn8/dCXJzKZlScno+ubwSfEUYE5jCLL/3Apaxhg1k+VyBU5zhPPQsRaW4NNZOlUKBJo5vIU1+AqJMic4=
    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
    E(w) =
    X
    ti
    2TOP(Tw,N)
    IDF(ti)
    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
    AAACmnicSyrIySwuMTC4ycjEzMLKxs7BycXNw8vHLyAoFFacX1qUnBqanJ+TXxSRlFicmpOZlxpaklmSkxpRUJSamJuUkxqelO0Mkg8vSy0qzszPCympLEiNzU1Mz8tMy0xOLAEKxQuYumqUayrYKsQUl+bGV5fEZ8Zk5lVXxxTlKoT4B9RqhMSX6/hp1tYqgIU8XdxqNYBqNOMFlA30DMBAAZNhCGUoM0BBQL7AcoYYhhSGfIZkhlKGXIZUhjyGEiA7hyGRoRgIoxkMGQwYCoBisQzVQLEiICsTLJ/KUMvABdRbClSVClSRCBTNBpLpQF40VDQPyAeZWQzWnQy0JQeIi4A6FRhUDa4arDT4bHDCYLXBS4M/OM2qBpsBckslkE6C6E0tiOfvkgj+TlBXLpAuYchA6MLr5hKGNAYLsFszgW4vAIuAfJEM0V9WNf1zsFWQarWawSKD10D3LzS4aXAY6IO8si/JSwNTg2YzcAEjwBA9uDEZYUZ6hgZ6hoEmyg5O0KjgYJBmUGLQAIa3OYMDgwdDAEMo0N7ZDAcZTjGcZpJhcmLyZPKGKGVihOoRZkABTCEA8oKcwQ==
    TOP(Tw, N)
    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
    AAACdXichVHLLgRBFD3T3uPV2EhEMjFMSGTcFgmxEjZWDDODBJl0t0JHv9LdM8LED/gBCzYkiPgMGz9g4RPEciQ2Fu70dCJMcCtVderUPbdOVWmuafgB0XNMamhsam5pbYu3d3R2dcs9vWu+U/R0kdcd0/E2NNUXpmGLfGAEpthwPaFaminWtYOF6v56SXi+4di54MgV25a6Zxu7hq4GTBVkubzlWYnccuZkNFc4HF8aK8hJSlMYiXqgRCCJKDKOfIst7MCBjiIsCNgIGJtQ4XPbhAKCy9w2ysx5jIxwX+AEcdYWOUtwhsrsAY97vNqMWJvX1Zp+qNb5FJO7x8oERuiJ7qhCj3RPL/Txa61yWKPq5YhnraYVbqH7tD/7/q/K4jnA/pfqT88BdjETejXYuxsy1VvoNX3p+KySnV0dKafoil7Z/yU90wPfwC696dcrYvUccf4A5edz14O1ybRCaWVlKjk3H31FKwYwhFF+72nMYREZ5PncEi5wjZvYuzQoDUupWqoUizR9+BbSxCdf8Y+C
    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

    View Slide

  20. • ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷIDFͷ܏޲ͷҧ͍ʹண໨
    • ൢചଅਐͷޮՌ͕ߴ͍࡞඼͸ɺ࡞඼λΠτϧʹIDF͕ߴ͍୯ޠΛؚΈͭͭɺ
    IDF͕௿͍୯ޠ΋ؚΜͰ͍Δ
    • ΧςΰϦؒҧ͍ͷ࡞඼ʢݕࡧੑͷ޲্ʹར༻ʣ͸ɺ࡞඼λΠτϧͷຆͲͷ
    ୯ޠͷIDF͕ߴ͍
    20
    ك᧵඼ͷ෼ྨ
    ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷ*%'ͷඪ४ภ͕ࠩେ͖͍΋ͷΛ
    ൢചଅਐͷޮՌ͕ߴ͍࡞඼ͱͯ͠ݕग़

    View Slide

  21. 21
    ඪ४ภࠩͷҧ͍ͷྫ
    ࡒ෍ͷ࡞඼ू߹ʹ͓͚ΔΧςΰϦؒҧ͍ͷ࡞඼
    λΠτϧ ʲड஫੍࡞ʳύϥϑΟϯൕ෍ͷࢴାόοάੜ੒Γ
    ୯ޠ ड஫ ੍࡞ ύϥϑΟϯ ൕ෍ ࢴା όοά ੜ੒Γ
    *%'
    λΠτϧ ʰίɾνϟοϐʔʱɹϨΠχʔϑϩοάɹ͔͑Δϛχ΢ΥϨοτɹϛχࡒ෍
    ୯ޠ ίɾνϟοϐʔ ϨΠχʔϑϩοά ϛχ ΢ΥϨοτ ࡒ෍
    *%'
    ࡒ෍ͷ࡞඼ू߹ʹ͓͚ΔൢചଅਐͷޮՌ͕ߴ͍࡞඼


    ඪ४ภࠩ
    ඪ४ภࠩ

    View Slide

  22. 4.
    ධՁ

    View Slide

  23. • ك᧵඼ͱ୯ޠͷग़ݱස౓ͷؔ܎ੑ
    • ࡞඼ͷධՁ஋ͷ্Ґʹك᧵඼͕Ґஔ͚ͮΒΕΔ͜ͱΛ֬ೝ
    • ك᧵඼ͷ༻్ผͷ෼ྨ
    • ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷIDFͷඪ४ภࠩʹΑͬͯɺك᧵඼Λ༻్ผʹ
    ෼ྨͰ͖Δ͜ͱΛ֬ೝ
    23
    ධՁ߲໨

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  24. • minne ͔Βநग़ͨ͠࡞඼ू߹ʹରͯ͠ఏҊख๏Λద༻͠2ͭͷௐࠪΛ࣮ࢪ
    • ࡞඼ू߹ɿ6909݅ʢࡒ෍ΧςΰϦɿ6904݅ɺόοάΧςΰϦɿ5݅ʣ
    • ൢചଅਐͷޮՌ͕ߴ͍࡞඼ͷྫͱͯ͠ɺminneͷӡӦऀ͕खಈͰൃݟͯ͠

    αΠτ্Ͱ঺հ͍ͯ͠Δ࡞඼Λ5݅ΛؚΉ
    • ΧςΰϦؒҧ͍ͷ࡞඼ͷྫͱͯ͠ɺόοάΧςΰϦͷ࡞඼Λ5݅ΛؚΉ
    • ͜ΕΒ10݅Λك᧵඼ͷྫʹઃఆ
    24
    ك᧵඼ͱ୯ޠͷग़ݱස౓ͷؔ܎ੑ
    NJOOF͸(.0ϖύϘגࣜձ͕ࣾӡӦ͢ΔϋϯυϝΠυ࡞඼Λѻ͏&$αΠτ


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  25. 25
    ௐࠪ1ɿධՁ஋ʹ͓͚Δك᧵඼ͷྫͷ෼෍
    • ฏۉ஋͔Β࠷େ஋ʹ͔͚ͯك᧵඼ͷྫ͕෼෍
    • ك᧵඼ͷྫ͕ൺֱతߴ͍ධՁ஋
    • ฏۉ஋෇ۙʹك᧵඼
    • 1୯ޠͷΈ͕௝͍͠୯ޠͰɺͦͷଞ͸සൟ
    ʹར༻͞ΕΔ୯ޠͰߏ੒͞ΕΔ࡞඼
    ఏҊख๏ʹΑͬͯٻΊͨධՁ஋ʹ͓͍ͯك᧵඼ͷྫ͕෼෍͢ΔҐஔΛ֬ೝ

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  26. • ධՁ஋ͷ্Ґͷ΄͏͕ك᧵඼ͱ൑அͰ͖Δ࡞඼͕ଟ͍
    26
    ௐࠪ2ɿධՁ஋ͷ্ҐͱԼҐͷك᧵඼ͷׂ߹ͷൺֱ
    ্Ґ ԼҐ
    ൢചଅਐͷޮՌ͕ߴ͍࡞඼


    ΧςΰϦؒҧ͍ͷ࡞඼


    ك᧵඼ʢখܭʣ


    ධՁ஋ͷ্ҐͱԼҐͷ࡞඼Λ໨ࢹͰ50݅ͣͭ֬ೝ͠ɺؚ·ΕΔك᧵඼ͷׂ߹ΛٻΊͨ

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  27. • σʔληοτ͸ك᧵඼ͱ୯ޠͷग़ݱස౓ͷؔ܎ੑͷධՁͰར༻ͨ͠΋ͷͱಉ༷
    • σʔληοτʹఏҊख๏Λద༻͠ɺ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷIDFͷඪ४
    ภࠩΛٻΊɺك᧵඼ͷྫͷ෼෍Λ֬ೝ
    27
    ك᧵඼ͷ༻్ผͷ෼ྨ

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  28. 28
    ඪ४ภࠩʹ͓͚Δك᧵඼ͷྫͷ෼෍
    • ൢചଅਐͷޮՌ͕ߴ͍࡞඼ͱΧςΰϦؒҧ͍
    ͷ࡞඼ͷ෼෍͕෼཭͢Δ܏޲͕͋Δ
    • ্ҐʹൢചଅਐͷޮՌ͕ߴ͍࡞඼͕෼෍
    ɹˠ ਪનʹར༻Մೳͱߟ͑ΒΕΔ

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  29. 5.
    ·ͱΊͱࠓޙͷ՝୊

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  30. • ࡞඼ू߹ʹ͓͍ͯ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷग़ݱස౓Λई౓ͱͯ͠ɺ͜ͷ
    ई౓͕૬ରతʹ௿͍࡞඼Λك᧵඼ͱͯ͠ݕग़͠ɺك᧵඼Λ༻్ผʹ෼ྨ͢Δख
    ๏ΛఏҊ
    • ఏҊख๏ʹΑͬͯٻΊͨධՁ஋ͷ্Ґʹك᧵඼͕ଟؚ͘·ΕΔ͜ͱΛ֬ೝ
    • ࡞඼λΠτϧʹؚ·ΕΔ୯ޠͷग़ݱස౓ͷඪ४ภࠩʹ͓͍ͯɺൢചଅਐͷޮՌ
    ͕ߴ͍࡞඼ͱΧςΰϦؒҧ͍ͷ࡞඼͕෼཭͢Δ܏޲Λ֬ೝ
    30
    ·ͱΊ

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  31. • ࡞඼ͷධՁ஋ͷܭࢉʹඪ४ภࠩΛ૊ΈࠐΉ͜ͱͰɺൢചଅਐͷޮՌ͕ߴ͍࡞඼
    ͷݕग़ਫ਼౓Λ޲্
    • ࣮؀ڥʹ͓͍ͯɺൢചଅਐͷޮՌ͕ߴ͍࡞඼Λਪનʹར༻ͨ͠৔߹ͷޮՌΛධ
    Ձ
    31
    ࠓޙͷ՝୊

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