优点：输出在 (−1,1)，比 sigmoid 居中，对梯度更友好
All of this brings me back to the question that's been haunting me since discovering the Dreamie: Is it ridiculous to spend $250 on an alarm clock/noise machine? At a different time in my life, I would have said yes without hesitation. But the current version of me, who knows what it's like to move through each day like a zombie because I'm sleeping so terribly, would begrudgingly disagree. As I pack up this review unit to ship it back, I'll also be putting in an order for my own so I can keep my cherished new sleep routine going.
。关于这个话题，heLLoword翻译官方下载提供了深入分析
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