freeCodeCamp/curriculum/challenges/chinese/11-machine-learning-with-python/tensorflow/neural-networks-activation-functions.md

---
id: 5e8f2f13c4cdbe86b5c72d93
title: '神经网络：激活函数'
challengeType: 11
videoId: S45tqW6BqRs
bilibiliIds:
  aid: 675610466
  bvid: BV1wU4y1A7TJ
  cid: 409130203
dashedName: neural-networks-activation-functions
---

# --question--

## --text--

哪个激活函数在 -1 和 1 之间切换值？

## --answers--

ReLU（线性整流函数）

---

Tanh（双曲函数）

---

Sigmoid

## --video-solution--

2
-												fix: QA/Infosec update and python to chinese

											
										
										
											2020-08-13 12:00:20 +02:00
+								---
 								id: 5e8f2f13c4cdbe86b5c72d93
-												chore(i18n,chn): manually downloaded curriculum (#42858)


											
										
										
											2021-07-15 13:04:11 +05:30
+								title: '神经网络：激活函数'
-												fix: QA/Infosec update and python to chinese

											
										
										
											2020-08-13 12:00:20 +02:00
+								challengeType: 11
 								videoId: S45tqW6BqRs
-												chore(i18n,curriculum): update translations (#43661)


											
										
										
											2021-10-03 12:24:27 -07:00
+								bilibiliIds:
 								  aid: 675610466
 								  bvid: BV1wU4y1A7TJ
 								  cid: 409130203
-												feat(curriculum): restore seed + solution to Chinese (#40683)

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
											
										
										
											2021-01-13 03:31:00 +01:00
+								dashedName: neural-networks-activation-functions
-												fix: QA/Infosec update and python to chinese

											
										
										
											2020-08-13 12:00:20 +02:00
+								---
-												chore(learn): Applied MDX format to Chinese curriculum files (#40462)


											
										
										
											2020-12-16 00:37:30 -07:00
+								# --question--
 								## --text--
-												chore(i18n,chn): manually downloaded curriculum (#42858)


											
										
										
											2021-07-15 13:04:11 +05:30
+								哪个激活函数在 -1 和 1 之间切换值？
-												chore(learn): Applied MDX format to Chinese curriculum files (#40462)


											
										
										
											2020-12-16 00:37:30 -07:00
 								## --answers--
-												chore(i18n,chn): manually downloaded curriculum (#42858)


											
										
										
											2021-07-15 13:04:11 +05:30
+								ReLU（线性整流函数）
-												chore(learn): Applied MDX format to Chinese curriculum files (#40462)


											
										
										
											2020-12-16 00:37:30 -07:00
 								---
-												chore(i18n,chn): manually downloaded curriculum (#42858)


											
										
										
											2021-07-15 13:04:11 +05:30
+								Tanh（双曲函数）
-												chore(learn): Applied MDX format to Chinese curriculum files (#40462)


											
										
										
											2020-12-16 00:37:30 -07:00
 								---
 								Sigmoid
 								## --video-solution--