输出层偏导数：首先计算损失函数相对于输出层神经元输出的偏导数。这通常直接依赖于所选的损失函数。 算法从输出层开始，根据损失函数计算输出层的误差，然后将误差信息反向传播到隐藏层，逐层计算每个神经元的误差梯度。 During the latter situation, making use of a backport might be impractical when compared with upgrading to the most up-to-date version on the software program. 隐藏层偏导数：使用链... https://cesarjdsfq.life3dblog.com/32944408/5-easy-facts-about-back-pr-described