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Updated: Jul 17, 2026

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利用机器学习算法在典型的工业园区精细地划出土壤地下水污染的三维界限,中国北部:多源辅助数据的重要性

Siyan Liu1, Xiao Yang2, Biling Shi2

  • 1Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China.

The Science of the total environment
|November 19, 2023
PubMed
概括

这项研究使用随机森林模型准确地绘制工业场所土壤污染的地图,提高地下水安全. 该模型有效地预测了污染物分布,这对于环境管理至关重要.

关键词:
逆向传播神经网络算法水文地质特征 水文地质特征工业场所污染 工业场所污染集成建模 集成建模 集成建模三维空间分析三维空间分析

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Linear Approximations01:23

Linear Approximations

For a differentiable function of two variables, linear approximation estimates values near a known point by replacing the curved surface with its tangent plane. Consider the function\begin{equation*}f(x,y)=x^2+3y^2\end{equation*}near the point (2, 1). The exact value at this point is f(2, 1) = 22 + 3(1)2 = 4 + 3 = 7.The linear approximation of f(x, y)) near (a, b) is\begin{equation*}L(x,y)=f(a,b)+f_x(a,b)(x-a)+f_y(a,b)(y-b)\end{equation*}First, compute the partial derivatives: fx(x, y) = 2x and...