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。
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10169-4
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Features in bullets:
The sixth tactic emphasizes showing fresh update signals throughout your content. AI models, especially those with real-time web access, demonstrate preference for current information over dated content. When choosing between two sources covering the same topic, with one clearly recent and another older, the fresher content usually gets cited unless there's a compelling reason to reference historical information.
thenationalnews.com