Unverified50% confidenceSolutionExact time

对共现矩阵先进行PMI变换再做SVD比直接对原始计数矩阵做SVD效果更好，因为能抑制高频词带来的噪声

1

Sources

50%

Confidence

Long-term

Relevance

8/18/2026

First Seen

Sources

Word Embeddings Explained: The Logical Relationship Between Word2Vec, SVD, and GloVe

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Unverified过程噪声协方差矩阵Q过小会导致滤波器对机动响应迟钝，Q过大则会放大测量噪声导致跟踪曲线抖动64% similar UnverifiedSGD引入的随机噪声是一种隐式正则化来源，使优化轨迹倾向于平坦极小值而非尖锐极小值61% similar

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