"But then they look back when they're older and go 'I missed that part of their lives', and that's awful. We don't want to be like that."
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为什么需要非线性？ 想象一下，如果网络里每一层都是线性的（比如 y=Wx+b），无论堆叠多少层，最终网络都只是一条线性映射。深度堆叠就没有意义了，网络的表达能力非常有限。。业内人士推荐旺商聊官方下载作为进阶阅读
assert d["1"] is None, "Sanity prevails! 😌"