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Julia Tokyo #4

~僕とJuliaと時々Mocha~
@vaaaaanqish
Profile
• Twitter : @vaaaaanquish
• 大学院二年
• ウサギィアルバイト
• 機械学習とか統計とか

数学とか就活とか
• Julia信仰半年無いくらい
Theme
• Deep Learningハッカソンで

Juliaパッケージ”Mocha”を使って入賞した話
Deep Learningハッカソン
• DeepLearning もくもくハッカソン

〜家に帰るまでがハッカソンです〜
• 2015/05/23(土)~24(日)
• 当日のTogetter

http://togetter.com/li/826176
Deep Learning
• なんか脳を模してるとかですごい
• なんか機械学習とか色々すごい
• なんか認識とか予測とか分類がめっちゃ出来る
当日
• きんいろDeepLearning

White scenery, @showyou

http://showyou.hatenablog.com/entry/2015/05/24/174621
• 建築コンペをdeep (learning)に審査してみた

SlideShare, Akio Ohta

http://www.slideshare.net/AkioOhta/deep-learning-
48538031
• ディープラーニングで本田翼を見分けたい。

Just another Blog site

http://hogehuga.com/post-409/
98割くらいの人
• 配布されたAWSクーポン
• DeepNetフレームワーク

「Caffe」や「Pylearn2」を使う
• C++やPythonのフレームワークはboost等

        依存ライブラリがかなり多い
• インストールや設定, 外枠コーディング

            にかなり時間を使う
厄介所
手慣れてないと…
• 機械学習は色々時間がかかる

> 面倒なライブラリ, フレームワーク群(小声)

> DeepNetは特にパラメータが多い
• 手慣れてないと実験すらままならない状況

> 結果として見れる状態にするので精一杯
ぼく
•JuliaとMocha
Mocha(モカ)
• CaffeライクなDeepLearningパッケージ
• MochaをGit cloneしていつもの

Pkg.add("Mocha")

using Mocha          →簡単!
部屋評価システム
• みんなシャレオツな部屋やオフィスが好きなはず!
• よくわからない尺度もDeepNetなら!
結果
• 二日間における有意義な実験とテスト
• プレゼンも上手くいって入賞できました
• AWSのクーポン合計1万円分!
• 全部JuliaとMochaのおかげ
•All thanks to 

Julia and Mocha!!
Juliaのメリット
• 誰にも頼らない行列計算!簡単!
• RecurentNN.jl, RandomForest.jl,

NN.jl, SVM.jl, Mocha.jl,

DataFramesMeta…, etc

ある!簡単!
• 中身もJulia!速い!拡張性!簡単!
Mochaのメリット
• 既存のライブラリだと

Caffe, Chainer, Pylearn2を凌いで

最も簡単にDeep Learningに手が届く(※個人の主観です)
• 速度, 精度も他ライブラリと同レベルかそれ以上
• 中もJuliaなのでカスタマイズが簡単
Mochaのメリット
• 記述も簡単

(公式サンプルが40行程度)
デメリット
• Mochaデメリット:

> Mocha Toolsはまだまだ不便

(データの正規化や水増し)



> 配布される学習済ネットワーク

→ 他ライブラリとの連携もなし
• Juliaデメリット:

> ユーザが少ない
Julia, Mochaまとめ
• 機械学習界において最強 (※個人の主観)
• このLTを元に記事を書く予定

> 好きな人を増やし隊

> 情報を増やしていこう!
• 「これからはJuliaの時代」

> JuliaとMochaの発展を願います
提供

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JuliaTokyo#4LT 僕とJuliaと時々Mocha @vaaaaanquish