如果不确定用哪个激活函数，隐藏层可以先用 ReLU，输出层按任务选择；训练中注意梯度情况，如果梯度消失或爆炸，再考虑替换或调整激活函数。
Hsin-Yi Lo,South East
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Not so much a bad night at the office as a high-stakes, avant-garde masterpiece of self-destruction, Ramy Bensebaini’s performance for Borussia Dortmund as they crashed out of Bigger Cup is destined to go down in the annals as one of the most hapless in the tournament’s history. While there have been costlier mistakes (hello, Loris Karius) and far more high-profile disintegrations (bonjour, b@nter-era PSG), it is difficult to recall any one elite professional footballer being responsible for quite so many howlers in one game as the hapless Algerian left-back.
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