在特征价格模型的应用中，函数形式的选择具有多样化，包括线性函数、对数函数、半对数函数等。
In the application of hedonic price model, it has a wide choice of function forms, including linear function, logarithmic function and semi-logarithmic function, etc.
强度非线性有指数和对数两种描述形式。
Nonlinear strength is described by exponential and logarithmic mode.
针对设计空间为的线性对数比模型，已有D -最优设计的分析形式的解并由关颖男教授给出了A -最优设计。
The Linear log quotient Mixture Model for the design space, there has been the analysis solution of D-optimal design given an a - optimal design by professor Guan Ying nan.
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