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。
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"Anthropic understands that the Department of War, not private companies, makes military decisions. We have never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner.
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