By Using Mathematical Method 运用数学方法
As a branch of geophysics, theoretical and applied researches in geothermics are made by using mathematical method and physical model experiment like other geophysical methods.
作为地球物理场的一个分支，地温场在理论和应用研究方面与其它地球物理场一样，也主要是依靠数学方法和物理模型实验的方法来进行的。
In this paper the total factor input function and the total factor productivity function were obtained by using mathematical method, and some problems concerning application were discussed.
本文用数学方法得出了全要素投入函数和全要素生产率函数，并对有关应用问题进行了讨论。
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