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相关概念视频

Regression Analysis01:11

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Regression analysis is a statistical tool that describes a mathematical relationship between a dependent variable and one or more independent variables.
In regression analysis, a regression equation is determined based on the line of best fit– a line that best fits the data points plotted in a graph. This line is also called the regression line. The algebraic equation for the regression line is called the regression equation. It is represented as:
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Heating and Cooling Curves02:44

Heating and Cooling Curves

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When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
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Temperature and Thermal Equilibrium01:11

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Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Response Surface Methodology01:16

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Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
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相关实验视频

Updated: May 23, 2025

Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
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城市形状和表面温度之间的关系基于XGBoost SHAP可解释的机器学习模型.

Jie Tan1, Qian-Jun Wei1, Zhao-Yang Liao1

  • 1College of Landscape Architecture and Art Design, Hunan Agricultural University, Changsha 410128, China.

Ying yong sheng tai xue bao = The journal of applied ecology
|May 17, 2025
PubMed
概括

城市形态显著影响土地表面温度 (LST). 建筑密度和夜间照明增加了LST,而植被和开放空间减少了它,为城市热管理提供了洞察力.

关键词:
在XGBoost-SHAP模型中.可以解释的机器学习城市2D/3D形式城市热岛效应是一种效应.

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科学领域:

  • 环境科学 环境科学
  • 城市规划 城市规划
  • 遥感 遥感 遥感 遥感

背景情况:

  • 全球日益增长的城市化和高层建筑需要了解城市形态对土地表面温度 (LST) 的影响.
  • 缓解城市热岛 (UHIs) 和优化城市规划需要对二维和三维城市形式进行详细分析.
  • 以前的研究往往侧重于线性关系,忽视了城市因素和LST之间的复杂非线性相互作用.

研究的目的:

  • 调查13个城市2D/3D形态因素对长沙LST的影响.
  • 用先进的建模技术揭示这些因素的非线性影响和贡献.
  • 为可持续的城市热管理和规划提供科学见解.

主要方法:

  • 从长沙的多源遥感数据中提取13个城市2D/3D形态因素.
  • 皮尔森相关性分析,以评估LST和形态因素之间的线性关系.
  • 应用XGBoost和SHAP模型来发现非线性影响和因素对LST的贡献.

主要成果:

  • 高LST集中在建筑密集的地区;低LST在绿色空间和河流沿线.
  • 对于标准化差异建筑指数 (NDBI),夜间照明 (NTL) 和建筑用地比例 (PCL) 发现了正相关性;对于标准化差异植被指数 (NDVI) 和天空视图系数 (SVF) 发现了负相关性.
  • NDBI,NTL,NDVI和Elevation (DEM) 是最有影响力的,解释了LST变异的60.9%,每个因素都观察到特定的非线性效应.

结论:

  • 城市形态,特别是NDBI,NTL,NDVI和DEM,通过复杂的非线性关系显著影响LST.
  • 绿色空间 (NDVI) 和开放空间 (SVF) 有效地减轻城市热量,而建筑区 (NDBI,PCL和NTL) 则会加剧城市热量.
  • 对于理解这些非线性城市热力学,XGBoost-SHAP模型是有效的,为绿色,低碳城市化的战略提供了信息.