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Unverified50% confidenceFactExact time

Ledoit-Wolf收缩的数学表达为Σ_shrunk = δ·F + (1-δ)·S,其中S是样本协方差矩阵,F是收缩目标,δ∈[0,1]是收缩强度

1
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50%
Confidence
Long-term
Relevance
9/11/2026
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