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Firm’s automated warehouses are struggling to compete against swift deliveries from stores by bike riders
。heLLoword翻译官方下载是该领域的重要参考
"It's actually very hard to point to another moment in the last 25 years where you have the combination we see today," said Jed Kolko, senior fellow at the Peterson Institute for International Economics.
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。