探讨了对混合回归模型的混合估计进行简单替代的问题，并给出了由此产生的对估计精度的影响的表达式。
This paper deals with the problem of simple substitution for the mixed estimator of mixed regression model and presents some formulas for its influence on estimator precision.
本文对光源的半宽度在测量某种溶液浓度时对其测量精度的影响进行初步地探讨，并给出一个相应的表达式。
The influence of the semibreadth of light source upon the measurement accuracy of the concentration of the solution is primarily discussed and then a corresponding expression is given in this paper.
然后在不考虑具体测量情况下，得到了整个预警系统的关机点时间估计精度的量化表达式。
Then, not considering the concrete measurement, we present the quantification expression of estimation precision of burnout time.
采用基于遗传程序设计方法实现函数自动建模无需预先确立经验模型，只需指定样本数据和精度要求即可获得回归表达式。
The method based on genetic programming to automatic model the function need not to estimate empirical formulas, only need the sample data and accuracy.
用近似解析方法推导出拉伸正交各向异性有限宽板偏心圆孔的应力集中系数的显式表达式，除了比较极端的情况外，该式的精度较好。
Using an approximate analytical method, the explicit expression of stress concentration factors is derived for an eccentric circular hole in a tension orthotropic finite-width strip.
用灰色静态模型建立起计算裂缝密度的表达式，计算结果精度较高。
Based on the gray static model, fracture density expression are worked out, and the calculated conclusion have higher precision.
给出了直角棱镜反射光矢量的完整表达式，在此基础上讨论了棱镜放置误差和角度误差对方位瞄准精度的影响。
The whole formula for the reflected ray vector of the right Angle prism is derived. Based on it, the influences of the prism laying and Angle errors on azimuth aiming accuracy are discussed.
本文以极简单的数学推导，给出了正常重力垂直梯度的实用表达式，并对其精度作出了评价。
By very simple mathematical derivations, the practical expression of (Vzz), the expression of normal vertical gravity gradient, and the comment on the accuracy were given.
本文提出了低温区高精度的禁带宽度的表达式，获得了低温区本征载流子浓度的简明公式。
A accurate expression for the bandgap and a simple formula for the intrinsic carrier concentration at low temperature are presented.
基于卡氏第二定理，推导出椭圆型弹性球铰链柔度、精度的解析表达式。
Based on the Castigliano's second theorem, the equations were formulated for the compliance and precision of an elliptical flexure spherical hinge.
基于卡氏第二定理，推导出椭圆型弹性球铰链柔度、精度的解析表达式。
Based on the Castigliano's second theorem, the equations were formulated for the compliance and precision of an elliptical flexure spherical hinge.
应用推荐