[KongchangAI]
Unverified50% confidenceFactExact time

PCA由Karl Pearson于1901年首次提出,后由Harold Hotelling在1933年发展完善

1
Sources
50%
Confidence
Long-term
Relevance
8/28/2026
First Seen

Sources

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Stable URI
https://kongchang.com/claim/813472
API
curl https://kongchang.com/api/v1/knowledge/claims/813472
MCP
get_claim(id=813472)