The estimates are the convex combinations of prior variance and sample variance. 这种估计实际上是先验方差(PV)与样本方差的凸组合。
Because the precise distribution of prior information is unknown, a example was given to illustrate the way to select the prior variance. In this case the Bayes estimator still has the PPC superiority. 鉴于一般情况下先验的精确分布是未知的,用实例给出了一种选取先验方差(PV)的方法,用这种方法得到的Bayes估计具有PPC优良性。
It utilizes the prior variance - mean relationship to construct the weight matrix and the two - dimensional ( 2D ) spatial information as the penalty or regularization operator. 该方法可利用均值-方差间关系等先验知识来构造加权矩阵,并利用二维局部空间信息来构造惩罚项或正则算子。
A Theoretical Analysis on Prior Estimation of Variance in Sample Survey 关于抽样调查中总体方差预先估计法的理论分析
Graphic Method for Solving Prior Distribution of Variance of Ballistic Missile Fall Point 弹道导弹落点方差先验分布密度的一种图解法