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第七章内容有错，还有反向传播代码有疑问。 #217

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liguang-ops opened this issue Dec 5, 2020 · 0 comments
Open

第七章内容有错，还有反向传播代码有疑问。 #217

liguang-ops opened this issue Dec 5, 2020 · 0 comments

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@liguang-ops
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在pdf第七章，172页中backpropagation()中，只更新了weights，没有更新bias,再查看第七章源码，的确没有更新。
此外，有一个问题，反向传播时，根据反向传播4个基本公式中，
image
，激活函数的导数的自变量应该是z(z = x*w +b),但是在代码中我看到，自变量变成了a
image
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