https://answer.freetools.me/tags/%E6%A2%AF%E5%BA%A6%E6%8E%A8%E5%AF%BC/ Recent content in 梯度推导 on Answer Hugo -- 0.152.2 zh-cn Wed, 11 Mar 2026 22:38:36 +0800 https://answer.freetools.me/%E4%BA%A4%E5%8F%89%E7%86%B5%E6%8D%9F%E5%A4%B1%E5%87%BD%E6%95%B0%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%99%E4%B8%AA%E5%85%AC%E5%BC%8F%E7%BB%9F%E6%B2%BB%E4%BA%86%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0%E7%9A%84%E6%A6%82%E7%8E%87%E9%A2%84%E6%B5%8B/ Wed, 11 Mar 2026 22:38:36 +0800 https://answer.freetools.me/%E4%BA%A4%E5%8F%89%E7%86%B5%E6%8D%9F%E5%A4%B1%E5%87%BD%E6%95%B0%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%99%E4%B8%AA%E5%85%AC%E5%BC%8F%E7%BB%9F%E6%B2%BB%E4%BA%86%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0%E7%9A%84%E6%A6%82%E7%8E%87%E9%A2%84%E6%B5%8B/ 从信息论的自信息概念出发，深入解析交叉熵损失函数的数学原理、梯度推导、与最大似然估计的等价性，以及在大语言模型训练中的核心作用。涵盖熵、KL散度、困惑度、数值稳定性、标签平滑等关键技术细节。