October 2020
Intermediate to advanced
693 pages
16h 26m
Chinese
Content preview from 机器学习实战：基于Scikit-Learn、Keras 和TensorFlow （原书第2 版）
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.
470
｜
第
16
章
可以在创建它时将它设置为 trainable = True 来更改它，以便你可以针对你的任务
来进行微调。
并非所有 TF Hub 模块都支持 TensorFlow 2，因此请确保选择一个支持的
模块。
接下来，我们只需加载 IMDb 评论数据集即可
—
无须对其进行预处理（除了批处理和
预取）并直接训练模型：
data sets, info = tfds.load("imdb_reviews", as_supervised=True, with_
info=True)
train_size = info.splits["train"].num_examples
batch_size = 32
train_set = datasets["train"].batch(batch_size).prefetch(1)
history = model.fit(train_set, epochs=5)
请注意，TF Hub 模块 URL 的最后一部分指定了我们想要模型的版本 1。此版本控制可
确保如果发布了新的模块版本，不会破坏我们的模型。方便的是，如果你在网络浏览器
中输入此 URL，你会得到此模块的文档。默认情况下，TF Hub 会将下载的文件缓存到
本地系统的临时目录中。你可能希望把它们下载到一个永久目录中，以避免在每次系统
清理后都必须再次下载它们。为此，请将 TFHUB_CACHE_DIR 环境变量设置为你选择
的目录（例如 os.environ["TFHUB_CACHE_DIR"] = "./my_tfhub_cache" ...
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.