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Why food fraud persists, even with improving tech，详情可参考WPS官方版本下载
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。，这一点在91视频中也有详细论述
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