mean-variance

常见例句

An algorithm based on inverse matrix for mean variance portfolio selection model is proposed.
介绍均值方差资产组合选择模型的一种以逆矩阵为基础的算法。
We proposed a mean variance portfolio selection model with the restricted short sales.The model was a convex quadric programming problem and was solved by the pivoting algorithm.
摘要本文提出了限制性卖空的均值-方差投资组合模型，通过变量替换将该模型转变为一般二次规划问题，从而运用不等式组的旋转算法进行求解。
My ideas are at variance with his.
我的思想和他的不同。
A Pivoting Based Algorithm for Self-Financing Mean Variance Portfolio Model
自融资均值方差投资组合模型的旋转算法
Nothing can set the twin brothers at variance.
没有什么事能使这对双胞胎兄弟吵起来。
Gene effects and effective gene number on litter size in pig are estimated from the mean and the mean variances of 6 generations including Taihu Pig(P1),Landrace (P2),first cross(F1),second cross(F2),third cross(F3)and back cross(B2).
利用太湖猪（P1）、长白猪（P2）、杂交一代（F1）、杂交二代（F2）、杂交三代（F3）；和回交一代（B2）等6个世代产仔数的材料，分析了猪产仔性状的基因效应和基因数。