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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People who believe they contribute to society are more likely to vote and engage in politics. They were also more likely to donate to and volunteer for political causes compared to individuals who saw their contribution to society as smaller.
· 李娜 · 来源：tutorial资讯