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有关于 Relu 反向传播的 python 代码。和代码是一样dx=(x>0)*dout的,x>0part 是做什么的?谁能解释一下这行代码?
dx=(x>0)*dout
x>0
Relu 函数定义为: f(x) = max(0,x) 表示 if x<=0then f(x)=0, else f(x)=x。
f(x) = max(0,x)
x<=0
f(x)=0
f(x)=x
所以如果x<=0, dx=0, 否则dx=dout。
dx=0
dx=dout