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Updated: Jul 28, 2026

Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry
08:23

Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry

Published on: March 9, 2018

区域PM2.5污染预测使用基于多尺度特征融合和深度学习算法的混合模型

Yong Zhang1, Wenya Zhang2, Bo Wu1,2

  • 1College of Mathematics and Statistics, Jishou University, Jishou, China.

PloS one
|October 9, 2025
PubMed
概括

一个新的深度学习模型准确地预测了成都-重庆城市聚集区的区域PM2.5污染. 这种先进的预测显著改善了雾污染的早期预警系统.

相关概念视频

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...