Unverified50% confidenceFactExact time
Swiss Roll数据集本质上是一张二维平面卷曲成三维螺旋卷的形态，其内在维度为2但嵌入在三维空间中，PCA降维会将螺旋不同层叠合
1
Sources
50%
Confidence
Long-term
Relevance
8/23/2026
First Seen
Sources
Entropic Scree：用信息熵替代方差重构PCA降维方法
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