February 2025
Intermediate
376 pages
9h 25m
Japanese
Content preview from 仕組みからわかる大規模言語モデル 生成AI時代のソフトウェア開発入門
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.
1
注意機構の計算
ここまでで、注意機構がトークン間の関連性を計算する仕組みについて直感的な説明を行い
ました。ここからはマスク付き注意機構の計算方法について、具体的に図と数式で説明しま
す。注意機構の構成は図1.3.12 のとおりです。
Q
K
V
図1.3.12
まず、注意機構の計算には、クエリ行列
Q
、キー行列
K
、バリュー行列
V
が必要です。
Q
=
XW
Q
K
=
XW
K
V
=
XW
V
ここで、
X
は入力埋め込み行列、
W
Q
、
W
K
、
W
V
はそれぞれ
D
model
#D
head
の重み行列です。
これらの重み行列は、モデルの学習によって更新されるパラメータです。
次に、クエリベクトルと似ているキーベクトルを探して演算する部分を説明します。似てい
るベクトルを探す操作は、ベクトル同士の内積で計算されます。ベクトルの内積は、ベクトル
の要素同士を掛け合わせて足し合わせる演算です。トークン同士の関連性を取得することが目
的のため、すべてのトークンのペアに対してクエリベクトルとキーベクトルの内積を計算しま
す。つまり
n
個のトークンに対して、
n# n
の行列を計算します。この行列の
i
行
j
列の要素
053
1.3
Transformerの仕組み
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.