激活函数的作用 激活函数在每个神经元输出前进行非线性变换，让网络可以拟合复杂的函数关系，从而解决分类、回归等非线性问题。
This article originally appeared on Engadget at https://www.engadget.com/general/the-morning-after-engadget-newsletter-144951777.html?src=rss
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const concat = (...arrays) = {