优点：计算简单，导数恒为1（正区间），缓解梯度消失
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。搜狗输入法2026对此有专业解读
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00619-4
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Pakistan’s patience runs out after badly miscalculating over Taliban
· 郭瑞 · 来源：app资讯