Add back propagation

pull/2/head
benjas 4 years ago
parent 31b86efd4a
commit 4ce2d93cbf

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### 第二章——走进深度学习的世界 神经网络模型
#### 反向传播计算方法
简单的例子:![1609311709861](assets/1609311709861.png)
![1609311772390](assets/1609311772390.png)
如何让 f 值更小就是改变x、y、z而损失函数也是这样那么我们分别求偏导则能得出每个值对结果的影响![1609311878585](assets/1609311878585.png)
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