April 2020
Intermediate to advanced
816 pages
18h 32m
Chinese
Content preview from 精通機器學習
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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.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.
習題
|
207
新實例
2.9
第 1 層
第 2 層
第 3 層
3.1
2.7
2.9
2.9
2.9
3.0
圖
7-15
多層
stacking
整體進行預測的情況
可惜的是
，Scikit-Learn
不直接支援
stacking，
不過自行實作也不是件難事
（
見接下來的習
題
）。
你也可以使用開放原始碼的作品
，
例如
DESlib
（https://github.com/Menelau/DESlib）。
習題
1. 如果你已經用同樣的訓練資料來訓練五種不同的模型了，而且它們都有 95% 的準確
度，你還可以結合這些模型來取得更好的結果嗎？如果可以，怎麼做？如果不行，
為什麼？
2. 硬投票與軟投票分類器的差異為何？
3. 你可以將 bagging 整體分散到多台伺服器來提升訓練速度嗎？ pasting 整 體、
boosting 整體、隨機森林、stacking 整體呢？
4. out-of-bag 評估有什麼好處？
5. 為何 Extra-Trees 比一般的隨機森林還要隨機？更隨機有什麼好處？ Extra-Trees 比一
般的隨機森林慢還是快？
208
|
第七章：整體學習與隨機森林
6. 如果你的 AdaBoost 整體欠擬訓練資料，你應該調整哪些超參數？如何調整？
7. 如果你的梯度增強整體過擬訓練組，你要提升還是降低學習速度？ ...
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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.