Spatial distribution of TN content could be forecasted by using linear regression model.
利用线性回归模型，可以预测TN含量的空间分布。
The hydrogeological structure model which represents the space structure of the hydro geological unit and the spatial distribution of aquifers, is the basement of groundwater and environment research.
水文地质结构模型是表现水文地质体的空间结构及含水层空间分布的模型，是地下水及与环境研究的基础。
A uniformly charged ring is a basic model in electromagnetics and applications, and it is important to study spatial distribution of electric field and electric potential generated by it.
均匀带电细圆环是电磁学理论及应用中的基本模型，研究其产生的电场在空间的分布具有重要意义。
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