样本协方差

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[数] sample covariance
... sample coupon [反应堆材料]试样件，试样块 sample covariance 样本协方差 sampled 采样的 ...
2
covar_samp double precision double precision
9.14. 数组函数和操作符 9.15. 聚集函数 ... covar_pop(Y, X) double precision double precision 总体协方差 covar_samp(Y, X) double precision double precision 样本协方差 regr_count(Y, X) double precision bigint 两个表达式都不为 NULL 的输入行数 ...

短语

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然而，目前国内外有关协方差矩阵正定性的研究结果并不多，并且大多是集中在连续型样本协方差矩阵方面。
However, there have been few outcomes about the positive definitiveness of covariance matrix, most of which have been restricted to the Covariance-matrix of continuous sample.
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这种方法不同于传统的统计方法需要计算样本协方差矩阵的逆矩阵，而是基于阵列数据的一种直接计算方法。
This approach, unlike the conventional statistical techniques requiring for a covariance matrix of sample, is based on direct spatial processing of the array data.
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分析当多元随机变量协方差阵正定时，各随机分量应满足的关系，并结合多项分布研究离散型与连续型样本协方差阵的不同。
And studying the difference of positive defined matrix of discrete and continuous sample by using of mal-distribution and the relationship among weights.

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