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。 A backport is mostly applied to handle stability flaws in legacy application or more mature versions with the computer software that remain supported because of the developer. Backp... https://backpr53591.ja-blog.com/34081361/5-simple-techniques-for-back-pr