激活函數Activation Functions

激活函數Activation Functions sigmoid σ(x)=1(1+e−x) σ ( x ) = 1 ( 1 + e − x ) 每個元素被壓縮到[0,1]範圍內 Squashes numbers to range [0,1] 它曾經一度非常流行，因爲它有一個很好的解釋就像神經元的飽和放電率Historically popular since they have nice inte

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