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数学知识点滴
方差 协方差 协方差矩阵 协方差矩阵对角化 矩阵的迹 均方误差 高斯分布 方差 分散程度,可以用数学上的方差来表述。 此处,一个字段的方差可以看做是每个元素与字段均值的差的平方和的均值,即: var(a) = 1/n * sum(ai - u)^2 如果 a的每个元素已经减去其 ...
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今日热点
Secret Service admits failure
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CA bill to protect kids online
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Sesame Place suit verdict
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SC 1st execution in 13 years
ISR strike on Gaza school
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