2026年04月05日 18:13:36
$$ \frac{\partial L}{\partial b^{(2)}} = \frac{\partial L}{\partial z^{(2)}} \frac{\partial z^{(2)}}{\partial b^{(2)}} = \frac{\partial L}{\partial z^{(2)}} $$计算\(\frac{\partial L}{\partial z^{(2)}}\)：
，这一点在搜狗输入法中也有详细论述
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