The Variance Function of the Difference between Two Estimated Responses
回顾了Herzberg(1967)的工作，并补充了一阶、二阶和三阶旋转设计下两个估计响应之差的方差函数的额外特征。
Summary The work of Herzberg (1967) is reviewed and some additional features of the variance function of the difference between two estimated responses, for first, second and third order rotatable designs are given.