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在深度学习中，激活函数（Activation Function）是神经网络的灵魂。它不仅赋予网络非线性能力，还决定了训练的稳定性和模型性能。那么，激活函数到底是什么？为什么我们非用不可？有哪些经典函数？又该如何选择？
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The Pixel 10 Pro Fold builds on last year’s excellent 9 Pro Fold by doing away with gears in the hinge along its spine allowing it to deal with dust, which has been the achilles heel of all foldable phones until now, gumming up the works in a way that just isn’t a problem for regular slab phones.
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加拿大人格雷格在广州旅居多年，日前到天津旅行。走进茶馆听相声，徜徉杨柳青古镇欣赏年画，跟着“泥人张”匠人体验泥塑制作……“这些民俗风情、传统技艺，无不彰显出中华优秀传统文化的深厚底蕴。”格雷格说。