为什么需要交叉熵作为代价函数？ - 知乎
24 June 2025 admin
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以下是为什么需要交叉熵作为代价函数的原因： 非负性：交叉熵代价函数具有非负性，这意味着目标是最小化代价函数。这种特性使得可以使用梯度下降等优化算法来寻找最优解。接近性：当真实输出与期望输出接近时，交叉熵代价函数接近于0。
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