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。
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民宿和酒店最大的区别，就是“人”。
2006年《商业周刊》的经典封面，专题报道贝索斯和AWS业务，称其为“充满风险的豪赌”。今日热点对此有专业解读
（本报记者李硕、孙龙飞采访整理）