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。
To minimize distractions when you're trying to sleep, the Dreamie's display will dim in response to the surrounding darkness. There's also a Redshift toggle to make the nighttime display easier on the eyes, a Dark Mode with a simplified appearance and the option to have the display turn off completely when you've been inactive for a while. I set the Dreamie on my nightstand close to where my face is at night, and I haven't had any problems with light from the display keeping me up.
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Photograph: Simon Hill