Unverified50% confidenceFactExact time
自动微分是PyTorch的.backward()和TensorFlow的GradientTape背后的核心原理，它在数值计算的同时进行导数追踪，既不引入数值误差也不产生表达式膨胀
1
Sources
50%
Confidence
Long-term
Relevance
7/19/2026
First Seen
Sources
梯度下降与反向传播详解：神经网络学习机制从零拆解
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