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[読み会]Deep Neural Decision Trees
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mei28
December 03, 2020
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[読み会]Deep Neural Decision Trees
読み会資料
Deep Neural Decision Trees (WHI2018)
mei28
December 03, 2020
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Transcript
%FFQ/FVSBM%FDJTJPO5SFFT ಡΈձ! ༶໌
wஶऀ w:POHYJO:BOH *SFOF(BSDJB.PSJMMP 5JNPUIZ.)PTQFEBMFT w5IF6OJWFSTJUZPG&EJOCVSH wग़య8)* จใ
wܾఆͱχϡʔϥϧωοτϫʔΫΛΈ߹Θͤͨʂ wܾఆͷղऍੑɼχϡʔϥϧωοτϫʔΫͷදݱྗʢਫ਼ʣͷ͍͍ ͱ͜औΓΛࢦ͍ͯ͠Δɽ ֓ཁ ͲΜͳจʁ
wۙɼχϡʔϥϧωοτϫʔΫʹΑΔϞσϧͷਫ਼͕ߴ͍ͷͰΑ͘ ΘΕ͍ͯΔ͕ɼग़ྗʹରͯ͠ͷղऍੑ͕͍͠ɽ wैདྷΘΕ͍ͯͨɼܾఆχϡʔϥϧωοτϫʔΫΑΓਫ਼͕ ग़ͤͳ͍͜ͱ͋ΔҰํͰɼղऍੑʹ༏Ε͍ͯΔɽ ֓ཁ ݚڀഎܠ
wطଘͷ//ϥΠϒϥϦʹߦՃ͢Δ͚ͩͰɼ࣮͕Մೳͳख๏Λఏ Ҋ wֶशํ๏શͯٯޡࠩిͰߦ͏͜ͱ͕ՄೳͰ͋Δɽ wຊख๏Ͱɼಛʹදܗࣜͷྨʹ༗ޮͰ͋Δɽ ֓ཁ ߩݙ
w4PGUCJOOJOHGVODUJPO %PVHIFSUZFUBM ͷςΫχοΫΛར ༻͢Δɽ w࣮ͷ࿈ଓ ΛCJOͰ͚ΔςΫχοΫɽ wˠඍՄೳͳؔΛ͍ͪͯߦ͏ͨΊɼٯޡ͕ࠩՄೳͰ͋ Δʂʂ
x ఏҊख๏ 4PGUCJOOJOHGVODUJPO
ఏҊख๏ 4PGUCJOOJOHGVODUJPO ͷϕΫτϧͷͳ͔ʹ binningΛߦ͏ ᮢ͕ೖ͍ͬͯΔ b ԹιϑτϚοΫεؔ ͷ࣌ One-hotϕΫτϧͱಉʹͳΔ
τ → 0
ఏҊख๏ 4PGUCJOOJOHGVODUJPO ԹιϑτϚοΫεؔ ͷ࣌ One-hotϕΫτϧͱಉʹͳΔ τ → 0
w#JOOJOHGVODUJPOʹΑͬͯɼ͚ΒΕͨಛྔΛ༻͍ͯɼχϡʔϥϧ ωοτϫʔΫϞσϧͰॱిΛߦ͏ɽ w//ͷ࠷ऴग़ྗʹରͯ͠ɼΫϩωοΧʔੵΛߦ͏ʢ༿͕Ͱ͖Δʣ wˠ΄ͱΜͲPOFIPUͱಉ͡ঢ়ଶʹͳΔɽ w༿Λશ݁߹ͨ݁͠Ռ͕ɼྨͨ݁͠ՌʹͳΔɽ ఏҊख๏ ༧ଌύʔτ
ఏҊख๏ ༧ଌύʔτ ಛྔʹରͯ͠ BinningΛߦ͏ Biningͨ͠ಛΛ༻͍ͯ χϡʔϥϧωοτϫʔΫΛߦ͏ ΫϩωοΧʔੵΛͱΓ શ݁߹͢Δ
w4PGUCJOOJOHGVODUJPOͱ//෦ඍՄೳͰ͋Δ͔Βֶशޡࠩ ٯΛ༻͍Δ͜ͱ͕Ͱ͖Δʂ ఏҊख๏ ֶश࣌
wطଘख๏ʢ//ϞσϧͱܾఆϞσϧʣͱఏҊख๏Λෳͷදܗࣜ σʔληοτͰਫ਼ͷൺֱΛߦ͏ɽ ࣮ݧ ࣮ݧͰ֬ೝ͢Δ͜ͱ
࣮ݧ ࣮ݧ݁Ռ
wطଘख๏ʹ༏ͬͨΓྼ͍ͬͯͨΓɼσʔληοτʹΑͬͯҰҰͰ ͋ͬͨɽ wطଘख๏ͱಉͷੑೳ͍࣋ͬͯΔɽ ࣮ݧ ࣮ݧ݁Ռ
wఏҊख๏ͰΘΕͳ͍ಛ͕͋Δ͜ͱ͕֬ೝͰ͖ͨ wˠ༧ଌʹඞཁͳ͍ͱஅͰ͖Δ ࣮ݧ ࣮ݧ݁Ռ
w༿ͷΫϩωοΧʔੵΛ ͱʹͲͷಛྔ͕ΘΕͯ ͍Δ͔Λநग़͢Δ͜ͱ͕Ͱ ͖Δɽ ࣮ݧ Ϟσϧͷղऍੑ
wಛྔ͕૿͑ͨ࣌Ͱɼ (16ʹΑΔܭࢉޮྑ ͔ͬͨɽ ࣮ݧ ܭࢉޮ
wຊݚڀͰɼܾఆͱ//ϞσϧΛΈ߹Θͤͨख๏ΛఏҊͨ͠ɽ wຊख๏Ͱɼ//ϞσϧͱಉͷੑೳΛ࣋ͪɼܾఆΈ͍ͨͳղऍੑ ͷߴ͍Ϟσϧʹͳͬͨɽ ·ͱΊ