# 神经网络策略

{% hint style="info" %}
([**神经网络策略**](https://share.weiyun.com/T6NAzM5i)([介绍](https://www.bfm-unity.com/management-cockpit-operation/shen-jing-wang-luo-ce-lve) | [原理](https://www.bilibili.com/read/cv7001287)) | [**同架策略**](https://share.weiyun.com/xUw40P4l)([介绍](https://guhhhhaa.gitbook.io/joinquant/jin-rong-li-lun-zong-jie/zi-chan-pei-zhi/tong-gen-ce-lve-yu-tong-jia-ce-lve)) **|** [**原始策略**](https://share.weiyun.com/a0QaKX11)**)——已作废，仅供参考**
{% endhint %}

```c
激活函数

sigmoid(x) = 1/(1 + exp(−x))

tanh(x) = (exp(x) - exp(−x))/(exp(x) + exp(−x))
tanh(x) = (1 - exp(−2 * x))/(1 + exp(−2 * x))

tanh(x) = 2 * sigmoid(2 * x) - 1
tanh(x / 2) = 2 * sigmoid(x) - 1 

ReLU(x) = MAX(x,0)

Swish(x) = x * sigmoid(x)
```

![神经网络建模](https://1260577746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgqpPlwTQfAEjXOBFmDK6%2Fuploads%2Fgit-blob-64480132d08a73f79743b149e1938306564b0566%2Fshen-jing-wang-luo-.png?alt=media)

## 8848手工打磨神经网络

![8848手工打磨高纯度钛合金神经网络](https://1260577746-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgqpPlwTQfAEjXOBFmDK6%2Fuploads%2Fgit-blob-5cd06827460cf98d1d9f1a2b89e7f1cb19a95e8d%2Fping-mu-kuai-zhao-20210214-shang-wu-9.48.42.png?alt=media)

## 商场，是什么？战（炸）场。