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？
Раскрыты подробности похищения ребенка в Смоленске09:27
，更多细节参见WPS官方版本下载
Вегас Голден Найтс
“We find that consumer prices have risen disproportionately in categories facing larger tariff increases,” Goldman Sachs said in a note to investors and analysts last autumn. An updated forecast this week estimated that “tariff pass-through increased core PCE (personal consumption expenditure) prices by about 0.7% through January and will raise prices by a further 0.1% in the remainder of 2026.”