> For the complete documentation index, see [llms.txt](https://wiki.aig123.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.aig123.com/ai-wiki/ren-gong-zhi-neng-zhuan-ye-shu-yu-biao/u.md).

# U

**Uncertainty（不确定性）**

可能包含真实值的一系列值。

**Underfitting（拟合不足）**

机器学习算法无法正确捕获数据的底层结构，通常是因为模型不够高级或不适用于当前任务；与过度拟合的涵义相反。

**Unsupervised Learning（无监督学习）**

机器学习的领域之一，包括对用于描述未标记数据结构的函数进行推断。


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