April 2020
Intermediate to advanced
552 pages
6h 13m
Japanese
Content preview from ゼロから作るDeep Learning ❸ ―フレームワーク編
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
ステップ15複雑な計算グラフ（理論編）
これまで私たちは、図15-1のような一直線に並ぶ計算グラフを扱ってきました。
図15-1 一直線の計算グラフ
しかし、変数や関数の「つながり方」は、そのような一並びの計算グラフだけとは限りません。私たちのDeZeroは、着実に進歩しています。今のDeZeroであれば、たとえば、図15-2のような計算グラフを作ることも可能です。
図15-2 より複雑な「つながり」の例
図15-2のように、同じ変数を繰り返し使ったり、複数の変数を入力する関数を使ったりして計算できます。それによって、より複雑な「つながり」を作ることができます。しかし残念ながら、私たちのDeZeroは、そのような計算の微分を正しく求めることができません。より正確には、そのような複雑な「つながり」の逆伝播を正しく行えないのです。
![[注記]](/api/v2/epubs/urn:orm:book:9784873119069/files/images/note.png) |
|
グラフの「つながり方」を、トポロジーと言います。本ステップの目標は、様々なトポロジーの計算グラフに対応することです。どのような「つながり」の計算グラフであっても正しく微分が求められるように、これから新しいアイデアを導入します。 ... |
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.