separate free list for each class. first, the number of objects per page is:
The only cons are that some photos contain people, and Pexels doesn't allow you to remove people from photos. Search your keyword and download as many as you want!
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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。