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強化学習
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changkita
January 08, 2018
Programming
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強化学習
強化学習の簡単な説明。
changkita
January 08, 2018
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Transcript
ڧԽֶशͬͯͳΜͩ kita.h
࠷ۙػցֶश͕Ξπ͍ΑͶ • Deep LearningͳͲͷػցֶशٕज़ͷਐาʹ ΑΓɺաڈͷσʔλ͔Βֶश͢Δٕज़େ͖ ͘ਐԽ • ࣸਅʹ͍ࣸͬͯΔରΛೝࣝපؾͷஅɺ ݴޠͷ༁ͳͲ
Ұํɺਓؒ • ਓؒɺաڈͷσʔλͳͲ༩͑ͳͯࣗ͘Β ֶΜͰܦݧ͠ɺεΩϧΛ্ୡͤ͞Δ͜ͱ͕Ͱ ͖Δ
ػցֶशͷओͳ ڭࢣ͋Γֶश ڭࢣͳֶ͠श ڧԽֶश
ڭࢣ͋Γֶश • ࣄલʹ༩͑ΒΕͨσʔλΛʮྫʯʮॿݴʯ ͱΈͳͯ͠ɺͦΕΛΨΠυʹֶͯ͠शΛߦ͏ • ͋Δೖྗͱ༧ଌͯ͠΄͍͠ग़ྗΛֶशσʔ ληοτͱͯ͠ɺະͷ৽͍͠ೖྗʹର͠ ͯ͋Δఔ༧ଌੑೳΛ࣋ͭΑ͏ͳͷ
ڭࢣͳֶ͠श • ʮग़ྗ͖͢ͷʯ͕͋Β͔͡Ίܾ·͍ͬͯ ͳ͍ • σʔλͷഎޙʹଘࡏ͢Δຊ࣭తͳߏΛநग़ ͢ΔͨΊʹΘΕΔ
ڧԽֶशᶃ • ͋Δڥʹ͓͚ΔΤʔδΣϯτ͕ݱࡏͷঢ় گΛ؍ଌ͠ɺऔΔ͖ߦಈΛܾఆ͢ΔΛ ѻ͏ػցֶशͷҰछɻ • ΤʔδΣϯτߦಈΛબ͢Δ͜ͱͰڥ͔ ΒใुΛಘΔɻڧԽֶशҰ࿈ͷߦಈΛ௨͡ ͯใु͕࠷ଟ͘ಘΒΕΔΑ͏ͳํࡦ(Policy) Λֶश͢Δɻ
WikipediaΑΓҾ༻
ڧԽֶशᶄ • ڭࢣ͋Γֶशʹࣅ͍ͯΔ͕ɺ໌֬ͳʮ͑ʯ ఏࣔ͠ͳ͍ • ఏࣔ͞ΕΔͷʮߦಈͷબࢶʯͱʮใुʯ • ʮ͑ʯ=ʮใुʯͰͳ͘ɺڧԽֶशͰͷใ ुʮ֤ߦಈʯʹରͯ͠༩͑ΒΕͣɺʮ࿈ଓ ͨ͠ߦಈͷ݁Ռʯʹରͯ͠༩͑ΒΕΔ
αοΧʔͰྫ͑·͢ᶃ • ΰʔϧΛܾΊͨΒ1ɺͱ͍͏ͷڧԽֶशʹ͓ ͚Δใु • ΰʔϧΛܾΊΔ·ͰͷԾఆʹ͓͚Δߦಈ(ύευ ϦϒϧͳͲ)ʹԿ༩͑ΒΕͳ͍ • ͜͜Ͱd(^_^o)ʮࠓͷύε͍͍ͬ͢ͶʙʯͳͲ ͱࢦ͕ࣔඈΜͰདྷΔͷ͕ɺʮڭࢣ͋Γֶशʯ
αοΧʔͰྫ͑·͢ᶄ • ʮ࿈ଓͨ͠ߦಈͷ݁Ռʯͱͯ͠ΰʔϧͷ1͠ ͔༩͑ΒΕͳ͍ͨΊɺͦΕʹࢸΔύευϦ ϒϧ͕ͲΕ͚ͩྑ͔ͬͨͷ͔ɺΰʔϧͰ͖ ͨέʔεͱͰ͖ͳ͔ͬͨέʔεΛൺͯɺࣗ ࣗͰධՁ͢Δඞཁ͕͋Δ
ڧԽֶश·ͱΊ • ʮ࿈ଓͨ͠ߦಈͷ݁Ռʯʹର͢Δใु͔Βɺ֤ߦ ಈͷʮධՁʯΛࣗࣗͰߋ৽͢Δ • ֤ߦಈʹର͢ΔใुΛஞҰઃఆ͠ͳͯ͘ɺ࠷ऴ తʹใु͕ಘΒΕΔ࿈ଓͨ͠ߦಈΛֶशͯ͘͠Ε Δ • কعғޟͰউͪෛ͚໌֬ͳͷͰɺ࠷ऴతʹ
উͭߦಈֶ͕शͰ͖Δ
ڧԽֶशͷܽ • ࢦ͕ࣔͳ͍தͰࣗࣗͰʮߦಈʹର͢Δධ ՁʯΛ֫ಘ͢Δඞཁ͕͋ΔͨΊɺ࠷దԽʹ ͕͔͔࣌ؒΔ • ڧԽֶश͕֫ಘͨ͠ʮߦಈʹର͢ΔධՁʯ͕ ਓ͕ؒݟͯ߹ཧతͳอূ͕ͳ͍
Deep Q-Learning • ڧԽֶशͷதͷҰछ • Deep Learningͷٕज़ΛɺQ-Learningͱ͍͏ ϑϨʔϜϫʔΫʹԠ༻ͨ͠ͷ
Deep Q-Learning • ͜ΕΛར༻ͯ͠ɺιϧେֶͷݚڀऀ͕ʮԾ ͷඈߦੜ͕ࣗͷඈߦํ๏Λֶश͠शಘ ͢ΔػցֶशΞϧΰϦζϜʯΛจͰൃද • ֶशͯ͠ٸ্ঢۭɺϗόϦϯάͳͲӡಈ εΩϧΛʹண͚ɺোʹͿ͔ͭΒͣʹࣗ ࡏʹඈΔΑ͏ʹ
Deep Q-Learning
ͳʹ͕͍͍ͷ͔ • ࡞ͨ͠ಈ͖ʹಛघޮՌΛೖΕΔ͜ͱͰөը ήʔϜͷίϯςϯπ࡞ʹʹཱͭ • ࣮ࡍʹଘࡏ͠ͳ͍ੜ͖ઈ໓ͨ͠ੜ͖ͷ ಈ͖͕ਪఆͰ͖Δ • ͍͢͝Ͷʔ