Area general variance function is obtained according to nesting theory.
借助套合理论建立区域性通用变异函数。
We propose a general semiparametric variance function model in a random design setting.
介绍具有随机设计的一类半参数方差函数模型。
The ideal parameter values of experimental variance function are determined via cross validation.
经交叉验证，优选出理想的实验变差函数参数值。
The ideal parameter values of experimental variance function are determined via cross validation.
经交叉验证，优选出理想的实验变差函数参数值。
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