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.
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。
A calculation model of the coefficient of heat transfer between gas and stave body and inlaid refractory is built based on the substitution method of boundary condition.
基于边界条件替换方法建立了高炉冷却壁本体和捣打料与炉气之间的换热系数计算模型。
By discussing elasticity of substitution, labor increase and cumulative causation of this model, we present characteristics of this model.
最后讨论了模型中替代弹性变化、劳动力增加以及累积循环过程所体现的特征。
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