A novel regression method based on the idea of graphical models is proposed to deal with the portfolio optimisation prob......

　　The parameters estimate is the basic elements of mathematical statistics in the random information.But the classical......

本文主要研究在线性回归模型中均值参数的二次型与线性型的和的估计,导出了二次无偏可估性条件,找出二次无偏估计。在正态条件下,......