April 2020
Intermediate to advanced
816 pages
18h 32m
Chinese
Content preview from 精通機器學習
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.
366
|
第十二章：用 TensorFlow 來自製模型和進行訓練
TensorFlow
簡介
你已經知道
TensorFlow
是一種進行數值計算的強大程式庫了
，
它特別適合處理大規模的
機器學習
，
也為大規模機器學習進行了微調
（
但你可以在任何需要重度計算的地方使用
它
）。
它是
Google Brain
團隊開發的
，
支援
Google
的許多大規模服務
，
例如
Google Cloud
Speech、Google Photos
以及
Google Search。
它在
2015
年
11
月開放原始碼
，
現在是最流行
的深度學習程式庫
（
根據引用它的論文數
、
採用它的公司數
、
它在
GitHub
得到的星級等
等
）。
無數的專案都使用
TensorFlow
來執行各種機器學習任務
，
例如圖像分類
、
神經語言
處理
、
推薦系統
，
以及時間序列預測
。
那麼
，TensorFlow
提供什麼功能
？
歸納如下
：
•
它的核心很像
NumPy，
但支援
GPU。
•
它支援分散式計算
（
分散到多台設備和伺服器
）。
•
它有一種即時
（just-in-time (JIT)）
編譯器
，
可優化運算過程
，
來改善速度和記憶體
的使用
。
它的做法是從
Python
函式提取
計算圖
，
接著優化它
（
例如剪掉用不到的節
點
），
最後高效地執行它
（
例如自動平行執行獨立的操作
）。
•
可將計算圖以可攜格式匯出
，
所以你可以在一個環境中訓練
TensorFlow
模型
（
例如在
Linux
使用
Python），
接著在另一個環境執行它
（
例如在
Android
裝置上使用
Java）。
•
它實作了
autodiff（
見第
10
章和附錄
D），
並提供一些優秀的優化 ...
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.