August 2021
Beginner to intermediate
720 pages
15h 32m
Korean
Content preview from fastai와 파이토치가 만나 꽃피운 딥러닝
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552
3
딥러닝의 기반 지식
X
2
의 지수 함수
LOG
(
f
)가 더 ‘다채로운’ 이유
정규 분포
정규 분포
히스토그램
정규 분포의 로그
정규 분포의 로그
활성 히스토그램
배치
모양(
4
,
1
,
28
,
28
)
빈도
단일 활성값
더 ‘다채로움’
활성들
2
차 함수
그림
13-15
다채로운 차원의 요약(출처: 스테파노 지오모)
이 삽화는
f
가 정규 분포를 따를 때,
log
(
f
)
가
f
보다 더 다채로운 이유를 설명합니다. 로그를
취하면 가우시안 곡선을
2
차 함수로 바꿔주는데, 이 함수는 좁지 않은 모양입니다.
이를 염두에 두고 두 번째 계층의 결과를 다시 살펴보죠.
learn.activation_stats.color_dim(-2)
553
13
합성곱 신경망
이는 전형적인 ‘나쁜 학습’의 그림입니다. 맨 왼쪽의 진한 파란색은 거의 모든 활성이
0
에서 시
작함을 나타내죠. 그리고 하단의 밝은 노란색은 거의
0
에 가까운 활성을 나타냅니다. 처음 몇
번의 배치에서
0
이 아닌 활성의 개수가 기하급수적으로 증가함을 볼 수 있습니다. 그러나 급격
히 증가한 다음 다시
0
이 되어 버렸습니다! 다시 진한 파란색과 밝은 노란색이 등장하죠. 즉 학
습이 다시 처음으로 돌아가 버린 것처럼 보입니다. 정도는 줄었지만 마찬가지로 계속해서 활성
값이 커졌다 줄어들기를 수차례 반복합니다. 그런 후에야
0
이 아닌 값들로 안정화된 ...
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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.