需求卡片 #421 · 相关性 中 · 新发现

非传统环境下梯度计算的替代需求

更新于 2026/10/12 22:08:13

问题概述

评论指出在非传统环境中(如RNN无BPTT或无法直接调用loss.backward)梯度计算受限。并将无后向传播方法作为潜在替代方案,但普遍持怀疑态度,认为此类方法在效率和实际影响上不如标准梯度下降。

痛点标签

待验证问题

证据

原话 · @匿名
Since reading that paper, I've had a lot of fun trying to apply this technique to settings I would describe as 'a traditional differentiable neural network being applied in a non-traditional environment where you can't just call loss.backward and hope for the best'.
原话 · @匿名
This is super yawn-worthy. Instead of backprop for the exact gradient you can run forward passes a thousand times with perturbed weights and get a Monte Carlo estimate of the gradient. Not very clever. Extremely NOT useful.

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