Goでつくる進化計算パッケージ

Transcript

1. GoConference’19
   GoͰͭ͘ΔਐԽܭࢉύοέʔδ
   @tsurubee
   2019.07.13 Go Conference '19 Summer in Fukuoka
   

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2. GoConference’19
   ௽ా തจ (@tsurubee)
   GMOϖύϘגࣜձࣾ ϗεςΟϯάࣄۀ෦

   ΠϯϑϥνʔϜ
   2
   

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3. GoConference’19
   ࠓ೔࿩͢͜ͱ
   wਐԽܭࢉͱ͸Ҩ఻తΞϧΰϦζϜͱ͸
   wҨ఻తΞϧΰϦζϜͷ࢓૊Έ
   w(PݴޠʹΑΔҨ఻తΞϧΰϦζϜͷ࣮૷
   wࠓ೔ͷ͓୊ʢ࠷దԽ໰୊ʣΛղ͍ͯΈΔ
   3
   

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4. GoConference’19
   ਐԽܭࢉͱ͸
   wੜ෺ͷਐԽ΍ৼΔ෣͍Λ໛฿ͨ͠࠷దԽख๏ͷ૯শ
   wϝλώϡʔϦεςΟοΫͳख๏Ͱ͋Γɺෳࡶͳ໰୊΍໰୊ߏ଄ͷಉఆ͕
   ࠔ೉ͳ໰୊ʹ΋༗ޮͳ࠷దԽख๏ͱͯ͠ظ଴͞Ε͍ͯΔ
   4
   

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5. GoConference’19
   ਐԽܭࢉͱ͸
   wੜ෺ͷਐԽ΍ৼΔ෣͍Λ໛฿ͨ͠࠷దԽख๏ͷ૯শ
   wϝλώϡʔϦεςΟοΫͳख๏Ͱ͋Γɺෳࡶͳ໰୊΍໰୊ߏ଄ͷಉఆ͕
   ࠔ೉ͳ໰୊ʹ΋༗ޮͳ࠷దԽख๏ͱͯ͠ظ଴͞Ε͍ͯΔ
   5
   NFUBIFVSJTUJDBMHPSJUIN
   ಛఆͷ໰୊ͷΈΛର৅ͱ͢ΔͷͰ͸ͳ͘ɺ
   ༷ʑͳ໰୊ʹରͯ͠ɺൺֱత୹࣌ؒͰ

   ۙࣅղΛޮ཰Α͘ٻΊΔղ๏
   

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6. GoConference’19
   ਐԽܭࢉύοέʔδ eago
   wཻࢠ܈࠷దԽ
   wҨ఻తΞϧΰϦζϜ
   6
   IUUQTHJUIVCDPNUTVSVCFFFBHP
   &WPMVUJPOBSZ"MHPSJUINJNQMFNFOUFEJO(P
   ࣮૷ΞϧΰϦζϜ
   

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7. GoConference’19
   ਐԽܭࢉύοέʔδ eago
   wཻࢠ܈࠷దԽ
   wҨ఻తΞϧΰϦζϜ
   7
   IUUQTHJUIVCDPNUTVSVCFFFBHP
   &WPMVUJPOBSZ"MHPSJUINJNQMFNFOUFEJO(P
   ࣮૷ΞϧΰϦζϜ
   ࠓճ͸ͪ͜Βʹ͍ͭͯ঺հʂ
   

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8. GoConference’19
   Ҩ఻తΞϧΰϦζϜ(GA)ͱ͸
   w ूஂͷதͰ؀ڥʹదԠͨ͠ݸମ͕ΑΓߴ͍֬཰Ͱ

   ੜ͖࢒Γɺ࣍ੈ୅ʹࢠΛ࢒͢ʢࣗવ౫ଡઆʣ࢓૊Έ

   Λιϑτ΢ΣΞతʹ໛͢͜ͱͰෳࡶͳ໰୊ʹର͢Δ

   ࠷దղΛ୳ࡧ͢Δख๏
   w ໰୊ͷղΛੜ෺ͷݸମʹݟཱͯͯɺͦͷݸମͷूஂʹ
   ରͯ͠ɺબ୒ʢ4FMFDUJPOʣަࠥʢ$SPTTPWFSʣಥવ

   มҟʢ.VUBUJPOʣΛద༻͢Δ
   8
   ೔ܦY5&$)৽ܕ৽װઢʮ/ܥʯͷlإz
   ΛੜΜͩʮҨ఻తΞϧΰϦζϜʯͷൿີ
   IUUQTXXXTMJEFTIBSFOFUL[PLNHFOFUJDBMHPSJUIN
   IUUQTUFDIOJLLFJCQDPKQJUBSUJDMF$0-6./
   

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9. GoConference’19
   9
   GAͷྲྀΕ
   

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10. GoConference’19
    10
    GAͷྲྀΕ
    ූ߸Խ
    

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11. GoConference’19
    11
    దԠ౓
    GAͷྲྀΕ
    ූ߸Խ
    

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12. GoConference’19
    12
    GAͷྲྀΕ
    దԠ౓
    બ୒
    ූ߸Խ
    

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13. GoConference’19
    13
    దԠ౓
    બ୒
    ަࠥ
    ಥવมҟ
    GAͷྲྀΕ
    ූ߸Խ
    

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14. GoConference’19
    ࠓ೔ͷ͓୊
    14
    

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15. GoConference’19
    Gopherͷը૾Λੜ੒ͯ͠ΈΑ͏ʂ
    15
    ූ߸Խʢ&ODPEJOHʣ
    దԠ౓ʢ'JUOFTTʣ
    બ୒ʢ4FMFDUJPOʣ
    ަࠥʢ$SPTTPWFSʣ
    ಥવมҟʢ.VUBUJPOʣ
    ҎԼͷεςοϓʹԊͬͯղઆ͍͖ͯ͠·͢ʂ
    

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16. GoConference’19
    1. ූ߸ԽʢEncodingʣ
    16
    ໰୊ʹର͢ΔղΛݸମͷછ৭ମɺղͷߏ੒ཁૉΛҨ఻ࢠͱͯ͠දݱ͢Δ
    છ৭ମ͸ɺʷʷ ࣍ݩϕΫτϧ
    'MBUUFOJOH
    ɾɾɾɾ
    ʷ
    <>VJOUܕ
    3(#"ը૾
    

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17. GoConference’19
    ໰୊ʹର͢Δղʢݸମʣͷྑ͞ΛධՁ
    2. దԠ౓ʢFitnessʣ
    17
    ը૾ؒڑ཭ʢྨࣅ౓ʣϐΫηϧؒڑ཭ͷ૯࿨ͷฏํࠜ
    ը૾ؒڑ཭͕θϩʹ͍ۙ΄Ͳɺ༏ΕͨղͰ͋Δ
    ը૾ؒڑ཭
    ϐΫηϧؒڑ཭ ϢʔΫϦουڑ཭
    

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18. GoConference’19
    3. બ୒ʢSelectionʣ
    ؀ڥʹదԠͰ͖Δݸମ΄Ͳ࣍ੈ୅ʹࣗ෼ͷҨ఻ࢠΛ࢒ͤΔΑ͏ʹ͢ΔͨΊʹɺ
    ਌ݸମͷదԠ౓ʹԠͯ͡ੜ͖࢒ΔݸମΛબ୒͢Δ
    18
    τʔφϝϯτબ୒ʢUPVSOBNFOUTFMFDUJPOʣ
    ϥϯμϜʹநग़ͨ͠4ݸͷݸମͷ͏ͪɺ

    ࠷΋దԠ౓͕ߴ͍ݸମΛબ୒
    " # $ %
    దԠ౓
    $
    func Select(indi Individuals) (Individuals, error) {
    if len(indi) < t.NContestants {
    return nil, errors.New("NContestants is too large")
    }
    selected := make(Individuals, len(indi))
    for i := range selected {
    winner := indi[rand.Intn(len(indi))]
    for j := 0; j < t.NContestants; j++ {
    next := indi[rand.Intn(len(indi))]
    if winner.Fitness > next.Fitness {
    winner = next
    }
    }
    selected[i] = winner
    }
    return selected, nil
    }
    

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19. GoConference’19
    4. ަ伹ʢCrossoverʣ
    19
    બ୒͞Εͨͭͷ਌ݸମΛަࠥ͠ɺࢠݸମΛੜ੒͢Δ
    Ұ఺ަࠥ
    
    
    ަࠥ఺
    ਌ݸମ̍
    ਌ݸମ̎
    
    
    ࢠݸମ̍
    ࢠݸମ̎
    ަࠥ఺Λڥʹޓ͍ʹཁૉΛަ׵͢Δૢ࡞Λߦ͏
    

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20. GoConference’19
    5. ಥવมҟʢMutationʣ
    20
    ͍ͣΕͷ਌΋͍࣋ͬͯͳ͍Ҩ఻ࢠΛࢠʹ࣋ͨͤΔ͜ͱͰଟ༷ੑͷҡ࣋͢Δ
    func (I Image) Mutation() {
    mutationRate := 0.0005
    rand.Seed(time.Now().UnixNano())
    for i := 0; i < len(I.Pix); i++ {
    if rand.Float64() < mutationRate {
    I.Pix[i] = uint8(rand.Intn(255))
    }
    }
    }
    
    
    ɾɾɾɾ
    ɾɾɾɾ
    Ұఆͷ֬཰Ͱཁૉͷ஋ΛϥϯμϜʹมߋ͢Δ
    

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21. GoConference’19
    Ҏ্ͷεςοϓΛ܁Γฦͯ͠

    ਐԽΛॏͶ͍͖ͯ·͢ʂ
    21
    

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22. GoConference’19
    ͳͥGoݴޠͰॻ͍ͨͷ͔ʁ
    22
    

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23. GoConference’19
    GAͷ՝୊ɿܭࢉ࣌ؒͷ୹ॖ
    w ("͸ɺ๲େͳܭࢉྔΛཁ͢ΔͨΊɺ࣮༻࣌ؒ಺Ͱྑ޷ͳղΛಘΔͨΊʹ

    ܭࢉॲཧΛߴ଎Խ͢Δ͜ͱ͕๬·Ε͍ͯΔ
    23
    w ("͸ɺෳ਺ͷղީิΛ༻͍ͨଟ఺୳ࡧͷΞϧΰϦζϜͰ͋ΔͨΊɺຊ࣭త
    ʹฒྻԽͱ਌࿨ੑ͕ߴ͍
    w ܭࢉ࣌ؒ୹ॖΛ໨తͱͯ͠ɺ༷ʑͳ("ͷฒྻԽख๏͕ఏҊ͞Ε͍ͯΔ
    

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24. GoConference’19
    24
    GA͸ॲཧΛฒྻԽ͠΍͍͢
    Goݴޠ͸ฒྻԽॲཧ͕ॻ͖΍͍͢
    GoݴޠΛ࢖͏ͱ༷ʑͳGAͷฒྻԽϞσϧ
    ΛαΫοͱ࣮૷Ͱ͖ͯ࠷ߴͳͷͰ͸ʁ
    

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25. GoConference’19
    ฒྻԽϞσϧɿϚελʔεϨʔϒํࣜ
    25
    4MBWF
    .BTUFS
    4MBWF 4MBWF
    ɾɾɾ
    ϚελʔεϨʔϒํࣜ
    w ("ͷ࠷΋୯७ͳฒྻԽϞσϧͰ͋ΓɺదԠ౓ܭࢉΛฒྻԽ͢Δ
    w શମͷ੍ޚ͓ΑͼҨ఻తૢ࡞Λߦ͏ϚελʔͱɺదԠ౓ܭࢉΛߦ͏ෳ਺ͷεϨʔϒ͔
    Βߏ੒͞ΕΔ
    ͜͜ΛฒྻԽ͢Δʂ
    

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26. GoConference’19
    goroutineʹΑΔGAͷฒྻԽ
    w ͦΕͧΕͷݸମͷదԠ౓ܭࢉ͸ಠཱͯ͠ߦ͑ΔͨΊɺదԠ౓ܭࢉΛ͢ΔͨΊͷεϨʔϒͱͯ͠
    HPSPVUJOFΛ্ཱͪ͛ͯɺฒྻͰܭࢉΛߦ͏
    26
    func (indis Individuals) Evaluate(parallel bool) {
    var wg sync.WaitGroup
    for i := range indis {
    wg.Add(1)
    go func(i int) {
    defer wg.Done()
    indis[i].Evaluate() //దԠ౓ܭࢉॲཧ
    }(i)
    }
    wg.Wait()
    }
    w TZOD8BJU(SPVQΛ༻͍ͯɺಠཱͨ͠ෳ਺ͷλεΫΛฏߦͰॲཧͯ͠ɺͦΕΒશͯͷऴྃΛ଴ͪ
    ߹ΘͤΔॲཧ͕γϯϓϧͳهड़Ͱ࣮૷Ͱ͖Δ
    

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27. GoConference’19
    Demo
    27
    

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28. GoConference’19
    GAʹΑΔը૾ੜ੒
    28
    (PQIFSͷ͕࢟ʜʂ
    ʻ৚݅ʼ
    1PQVMBUJPO4J[F

    $SPTTPWFS3BUF

    .VUBUJPO3BUF

    5PVSOBNFOU4J[F
    ੈ୅໨ ੈ୅໨ ໨ඪ
    ੈ୅໨
    

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29. GoConference’19
    ฒྻԽͷ༗ޮੑ
    29
    దԠ౓ܭࢉͷฒྻԽ͕ॲཧ࣌ؒͷ୹ॖʹد༩͍ͯ͠Δ
    Ϛγϯɿ.BD#PPL1SP

    ϓϩηοαɿ()[*OUFM$PSFJ

    ϝϞϦɿ(#
    

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30. GoConference’19
    ·ͱΊ
    w("Λ࢝Ίͱͨ͠ਐԽܭࢉ͸ɺෳࡶͳ໰୊΍໰୊ߏ଄ͷಉఆ͕ࠔ೉ͳ໰୊
    ʹ΋༗ޮͳ࠷దԽख๏ͱͯ͠ظ଴͞Ε͍ͯΔ
    w("͸ଟ఺୳ࡧΞϧΰϦζϜͰ͋ΔͨΊɺฒྻԽͱ਌࿨ੑ͕ߴ͍
    wHPSPVUJOFΛ༻͍ΔͱαΫοͱ("ͷฒྻԽॲཧ͕ॻ͚Δ
    w("ͰԿͱ͔(PQIFSͷ໘Ө͕ݟ͑Δը૾͕࡞Εͨ
    30
    

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31. GoConference’19
    ͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ
    31
    

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