Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
敷居の低いAI勉強会#3
Search
asagiman
January 14, 2022
0
52
敷居の低いAI勉強会#3
第3回G検定合格講座
1. 活性化関数
2. 学習率の最適化
3. 更なるテクニック
4. CNN:畳み込みニューラルネットワーク
asagiman
January 14, 2022
Tweet
Share
More Decks by asagiman
See All by asagiman
G検定講座#1
asagiman
0
71
敷居の低いAI勉強会#4
asagiman
0
58
BIRD
asagiman
0
58
開発合宿#1_アジェンダ
asagiman
0
180
画像解析(MNIST)
asagiman
0
87
「さんすう」
asagiman
0
82
G検定#2
asagiman
0
97
みやこもくもく会#8資料「機械学習実践セミナー」
asagiman
0
180
AI & Disconnecting the Dots
asagiman
0
45
Featured
See All Featured
Leading Effective Engineering Teams in the AI Era
addyosmani
7
600
How GitHub (no longer) Works
holman
315
140k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
140
34k
Building Flexible Design Systems
yeseniaperezcruz
329
39k
Large-scale JavaScript Application Architecture
addyosmani
514
110k
Fireside Chat
paigeccino
41
3.7k
Building an army of robots
kneath
305
46k
Principles of Awesome APIs and How to Build Them.
keavy
127
17k
The Cost Of JavaScript in 2023
addyosmani
55
9.1k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
10
890
Facilitating Awesome Meetings
lara
57
6.6k
Transcript
Έ͜Ͱ*5 ෑډͷ͍"*ษڧձ ϓϨθϯλʔɹTomohiro Iida ࢀߟॻ੶ɹʮσΟʔϓϥʔχϯάɹGݕఆެࣜςΩετʯɹमɿJDLA
ΞδΣϯμ ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲
./*45ϋϯζΦϯʢʣ
ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲ ./*45ϋϯζΦϯʢʣ
ܦྺ
ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲ ./*45ϋϯζΦϯʢʣ
ࢯ໊ʢϋϯυϧωʔϜՄʣ झຯ ࠓͷே͝ΜԿΛ৯·͔ͨ͠ʁ ࢀՃऀࣗݾհ
ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲ ./*45ϋϯζΦϯʢʣ
(ݕఆ߹֨ߨ࠲ θωϥϦετʹ͍ͭͯ (ݕఆ֓ཁઆ໌ʢఆٛɾࢼݧ༰ʣ ୈ̒ষʢσΟʔϓϥʔχϯάͷख๏ʣ
ࠓޙधཁ͕ߴ·Δ"*ਓࡐͷখ ʮ"*ΤϯδχΞʹݶΒͣͰ͕͢ɺ ࠓɺݱʹΓͳ͍ͷ θωϥϦετͱͯ͠׆༂Ͱ͖Δਓ ͩͱ͍͏͜ͱ͕Α͘ݴΘΕ͍ͯ·͢ɻΞϧΰϦζϜɺΤϯδχΞϦϯάɺϏδ ωεɺͦͷͯ͢ͷͰೳྗΛൃشͰ͖Δਓ͕ٻΊΒΕ͍ͯΔΑ͏Ͱ͢ɻʯ CZגࣜձࣾϝϧΧϦɹ"*ΤϯδχΞɹদԬྰԻ͞Μ IUUQTUZQFKQFUGFBUVSF
IUUQTUZQFKQFUGFBUVSF (ݕఆͷ֓ཁઆ໌ఆٛ (ݕఆͱʁ ɹ"*δΣωϥϦετΛഉग़͢ΔͨΊͷݕఆͷ͜ͱ ɹ"*δΣωϥϦετͱʁ ɹʰσΟʔϓϥʔχϯάͷجૅࣝΛ༗͠ɺదͳ׆༻ํΛܾఆ͠ ͯࣄۀԠ༻͢ΔೳྗΛ࣋ͭਓࡐʱʢ+%-"ެࣜ)1ʣ
(ݕఆͷ֓ཁઆ໌ࢼݧ֓ཁ JDLAެࣜHP ެࣜHPΛࢀর͠·͠ΐ͏ʂ
(ݕఆͷ֓ཁઆ໌ࢼݧ֓ཁ ࣌ؒΊͬͪΌݫ͍͠ ݸͷΛͰղ͢Δʹʹ͔͚ΒΕΔฏۉ࣌ؒඵ ҉هଈͰ͖ΔϨϕϧʹ͠Α͏ʂ ˑ5*14 ɹͯ͢ͷʹνΣοΫϘοΫε͕ଘࡏ͠·͢ɻ ɹগ͠ͰΜͩνΣοΫͯ͠ޙճ͠ʹͯ͠͠·͓͏ʂ
(ݕఆͷ֓ཁઆ໌ࢼݧ֓ཁ ݫ͠Ί ؙ҉هͰͯ͢ʹ͑ΒΕͳ͍ɻ σΟʔϓϥʔχϯάʹؔͯ͠ಛʹཧղΛਂΊ͍ͨͱ͜Ζɻ ˑ5*14 ɹେ·͔ͳߏͪ͜Βɻ ɹਓೳͷجૅࣝʢୈষʙୈষʣɹɹׂ ɹσΟʔϓϥʔχϯάʢୈষʙୈষʣɹɹׂ ɹ࢈ۀͷԠ༻ɾ࣌ࣄʢୈষʙୈষʣׂ
ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲ ./*45ϋϯζΦϯʢʣ
׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ 3//ϦΧϨϯτχϡʔϥϧωοτϫʔΫ
ਂڧԽֶश ਂੜϞσϧ (ݕఆ߹֨ߨ࠲ ୈ6ষ:σΟʔϓϥʔχϯάͷख๏ ׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ
׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ
׆ੑԽؔ ύʔηϓτϩϯʹΑΔܭࢉ ೖྗ தؒ ग़ྗ IUUQTUPLFJOFUOFVSBMOFUXPSLBDUJWBUJPO@GVODUJPO ׆ੑԽؔʹΑΔܭࢉ ׆ੑԽؔ
׆ੑԽؔͷׂ ϞσϧͷදݱྗΛ૿͢ ͜Μͳͷࣅ߹͏ Μ͡Όͳ͍͔͠Β
εςοϓؔ IUUQTUPLFJOFUOFVSBMOFUXPSLBDUJWBUJPO@GVODUJPO ใͷϩε͕ܹ͘͠ දݱྗʹ͍͠ͷ͕ܽ
IUUQTOFXUFDIOPMPHZMJGFTUZMFOFU&&"&#&"&&'&&#&&""&&###&"&$&"&#&"&"' γάϞΠυؔ ೖྗ͕ͨ͠େ͖͚Εେ͖͍΄Ͳʹ͖ۙͮɺ ೖྗ͕ͨ͠খ͚͞Εখ͍͞΄Ͳʹۙͮؔ͘ɻ ݩͷೖྗͷΛࡴ͗͢͠ͳ͍ͱݴ͑Δɻ IUUQTUPLFJOFUOFVSBMOFUXPSLBDUJWBUJPO@GVODUJPO
γάϞΠυؔ χϡʔϥϧωοτϫʔΫͰ༻͍ΒΕΔ׆ੑԽ͕ؔͩݱࡏ͋· ΓΘΕ͍ͯͳ͍ɻ γάϞΠυؔΛ׆ੑԽؔͱͯ͠༻͍Δͱޯফࣦͱ͍͏ݱ ͕ى͜Γɺֶश͕ఀͯ͠͠·͏͜ͱ͕͋ΔͨΊɻ IUUQTJNBHJOHTPMVUJPOOFUEFFQMFBSOJOHNBUIFNBUJDTEFSJWBUJWFPGTJHNPJEGVODUJPO
IUUQTUPLFJOFUOFVSBMOFUXPSLBDUJWBUJPO@GVODUJPO ιϑτϚοΫεؔ ग़ྗͰΘΕΔؔɻ ҰൠతʹྨͰΘΕΔɻ
IUUQTTPOFPIBUFOBCMPHDPNFOUSZ UBOIؔ γάϞΠυؔΑΓਫ਼͕ग़͍͢ͷͷɺ͋͘·Ͱඍͷz࠷େz ͕ʮ̍ʯͰ͋Γɺ̍ΑΓখ͍͞ʹͳͬͯ͠·͏έʔε͕΄΅શͯɻ ਂ͍ωοτϫʔΫͰɺޯফࣦΛ͙͜ͱ͕͍͠ɻ
ೖྗ͕ҎԼͳΒɺҎ্ͳΒͦͷ··ग़ྗ͢Δؔͷ͜ͱɻ ҎԼͷࣜͰදͤΔɻ ZNBY Y IUUQTUFDICMPHHNPBQKQ&"'&"#&"%"&#'&&"&#$&&"&#$&#&#&#&"&#%#'&'&$&#&'#"&$"$&"&"" 3F-6ؔ 3F-6ؔ࠷Ұൠʹ༻͍ΒΕΔ׆ੑԽؔɻ ͭͷେ͖ͳಛɿ ޯফࣦ͕ى͜Γʹ͍͘
ܭࢉ͍͢͠ͱ͍͏ 3F-6ؔ࠷׆ੑԽؔͱ͍ͯ͠উख͕͍͍ͱ͞ΕΔɻ
IUUQTTPOFPIBUFOBCMPHDPNFOUSZ 3F-6ؔ Y͕ΑΓେ͖͍߹ɺඍৗʹ࠷େͰ͋Δ͕ಘΒΕΔɻ ޡࠩٯͷࡍʹޯ͕খ͘͞ͳΓʹ͍͘ ʢޯফࣦ͠ʹ͍͘ʣ
׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ
ޯ߱Լ๏ ඍΛ׆༻͢Δ͜ͱʹΑͬͯɺ Ϟσϧͷ༧ଌͱ ࣮ࡍͷʢຊͷਖ਼ղʣ ͱͷޡࠩΛͳ͍ͯ͘͘͠ɻ ͦͷΞϓϩʔνΛ࣮ݱ͢Δख๏ʹ ޯ߱Լ๏
ޯ߱Լ๏ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG ֶशΛ͏·ʙ͘ௐ͢Δ͜ͱ͕େ⭐ ޯ߱Լ๏ͷߟ͑ํ˰্͔ΒϘʔϧΛམͱ͠Ұ൪͍ͱ͜Ζ୧Γண͘·Ͱͭ େҬ࠷దղʹຊͷ࠷దղ ہॴ࠷దղʹݟ͔͚ͤͷ࠷దղ
ޯ߱Լ๏ ࣌ࠁ𝑡Ͱ𝝎 𝑡 ʹ͋ͬͨϘʔϧΛޯͷٯํಈ͔͢ࡍͷϧʔϧ 𝝎(𝑡+1) = 𝝎(𝑡) + ∆𝝎(𝑡) ,
∆𝝎(𝑡) = −𝜂𝛻𝐸 𝝎 𝑡 (4.9) 𝑡 lͱॱ࣍܁Γฦ͢͜ͱͰɼޡࠩؔάϥϑͷఈ߱Γ͍ͯ͘ ˎ̍εςοϓͷҠಈڑ∆𝝎 𝑡 lֶशz𝜂Ͱܾఆ͞ΕΔ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG
ޯ߱Լ๏ ˎ̍εςοϓͷҠಈڑ ʮޯʹԊͬͯҰʹͲΕ͚ͩ߱Γ͍͔ͯ͘ʯ lֶशzʢϋΠύʔύϥϝʔλʣ
ޯ߱Լ๏ ֶशͷऔΓํτϥΠΞϯυΤϥʔʹجͮ͘ w ֶश͕େ͖͍ ˰ࠁΈ͕ߥ͗ͯ͢ޡࠩؔͷܗঢ়Λଊ͑ΒΕͣɼऩଋ͠ͳ͍ w ֶश͕খ͍͞ ˰ֶश͕Ұʹਐߦ͠ͳ͍ IUUQXXXQMBODWUJUFDIBDKQGVLVEBMBCCBDCEEBCDCBGDDGDQEG
ࣗݾհ IUUQTRJJUBDPN)JSPLJYJUFNTBBCEE
ϋΠύʔύϥϝʔλ ʁʁʁϋΠύʔύϥϝʔλʁʁʁ IUUQTYOUKBBORKNKUGQDKEDPN&&##"&#&"&"#&$"$&#&"&"&&&&'#$&&"#&#"&'&$&&"&"&&'
׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ
υϩοϓΞτ Θͨ͠ͷλʔϯʂ ຐ๏Χʔυɹ lΦʔόʔϑΟοςΟϯάz IUUQTCPLFUFKQCPLF ͋͞ɺ࢝ΊΔΘΑɻ ҋͷήʔϜΛɾɾɾ
υϩοϓΞτ ͦ͜·Ͱͩ;&ͬˑ Θͨ͠ ਓೳքͷࢧऀʹͳΔͷΑ ୭ʹअຐͤ͞ͳ͍Θɾɾɾ
υϩοϓΞτ τϥοϓΧʔυൃಈʂ lυϩοϓΞτ IUUQTNBUPNFOBWFSKQPEBJ
χϡʔϩϯΛϥϯμϜʹυϩοϓΞτ͠ɺ ΦʔόʔϑΟοςΟϯάΛ͙ IUUQTRJJUBDPNNJOFJUFNTECBCCFGD υϩοϓΞτ
ςετσʔλʹର͢Δޡࠩؔͷ্͕Γ࢝Ί ʹଧͪΓʹ࠷దͳλΠϛϯάͱݟͳ͢ FBSMZTUPQQJOH ֶशΛૣΊʹଧͪΔख๏ ./*45ϋϯζΦϯͰ֬ೝ͠·͢ʂ
σʔλͷਖ਼نԽ ֤ಛྔΛdͷൣғʹม͢Δॲཧ ./*45ϋϯζΦϯͰ֬ೝ͠·͢ʂ
σʔλͷඪ४Խ ඪ४Խ͢ΔͱԿ͕ྑ͍ͷ͔ʁ
׆ੑԽؔ ֶशͷ࠷దԽ ߋͳΔςΫχοΫ $//ΈࠐΈχϡʔϥϧωοτϫʔΫ
$//ͱ ը૾σʔλʹదͨ͠ܗͷ χϡʔϥϧωοτϫʔΫ ը૾Λͦͷ··ͷܗʹ̎࣍ݩͰ ѻ͏͜ͱ͕Ͱ͖Δ $POWPMVUJPOBM/FVSBM/FUXPSL
$//ʢશମ૾ʣ $//ɺΈࠐΈϓʔϦϯάʹΑͬͯಘΒΕͨಛϚοϓͷ֤ϐΫηϧσʔλΛɺ χϡʔϥϧωοτϫʔΫͷೖྗͱͯ͠ར༻͢Δɻ IUUQTXXXBUNBSLJUDPKQBJUBSUJDMFTOFXTIUNM
$// ΈࠐΈ IUUQTULFOHPHJUIVCJPCMPHVOEFSTUBOEJOHDPOWPMVUJPOBMOFVSBMOFUXPSLTGPSOMQ
Χʔωϧ ʢϑΟϧλʔʣ
$// ϓʔϦϯά IUUQTULFOHPHJUIVCJPCMPHVOEFSTUBOEJOHDPOWPMVUJPOBMOFVSBMOFUXPSLTGPSOMQ ಛϚοϓͷ࠷େΛநग़͠ɺ ը૾αΠζΛܾΊΒΕͨϧʔϧʹैͬͯ খ͘͢͞Δ NBYϓʔϦϯά
$// શ݁߹ ग़ྗͷܗΛ̍࣍ݩʹมܗ͢Δ ௨ৗͷχϡʔϥϧωοτϫʔΫͱಉ͡ ʮӅΕʯʮग़ྗʯʹଓ͠ɺ
ࣗݾհʢʣ ࢀՃऀͦΕͧΕͷࣗݾհʢʣ (ݕఆ߹֨ߨ࠲ ./*45ϋϯζΦϯʢʣ
./*45ͱ ./*45ͱɺը૾σʔληοτͷ͜ͱɻ ʢखॻ͖ࣈը૾ ຕͱɺςετը૾ ຕΛूΊͨͷʣ ҎԼ͕ϖΞʹͳ͍ͬͯΔɻ खॻ͖ͷʙͷࣈ͕ॻ͔Εͨը૾σʔλͱɺ ͦͷը૾ʹॻ͔Ε࣮ͨࡍͷࣈσʔλ
./*45ͱ IUUQTXFCMBCPPTDBTJFSSBOFUQZUIPOLFSBTNOJTUTBNQMFIUNM σʔλͷ༷ࢠ
./*45ͱ IUUQTXFCMBCPPTDBTJFSSBOFUQZUIPOLFSBTNOJTUTBNQMFIUNM ग़ྗ͜Μͳײ͡ ࣈ ֬ 0 0.014 1 0.001 2
0.013 3 0.719 4 0.034 5 0.016 6 0.023 7 0.065 8 0.086 9 0.029
ͰɺͬͯΈ·͠ΐ͏ ࣮
4FRVFOUJBMϞσϧ IUUQNBSVQFLFDPN*,%"%7@%-@/P@,FSBTIUNM
͓͠·͍ pO