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相关概念视频

Temperature Measurement Sites01:14

Temperature Measurement Sites

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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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Methods of Obtaining Topography01:25

Methods of Obtaining Topography

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Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
51
GIS Software, Hardware, and Sources of GIS Data01:23

GIS Software, Hardware, and Sources of GIS Data

40
A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
40
Precipitation Gravimetry01:03

Precipitation Gravimetry

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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

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Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
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Precipitation Processes01:12

Precipitation Processes

420
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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相关实验视频

Updated: Jun 4, 2025

Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
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Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data

Published on: December 12, 2013

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根据空间融合模型和机器学习算法生成每小时30米的陆地表面温度.

Qin Su1,2, Yuan Yao1,2,3, Cheng Chen1,2

  • 1School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China.

Sensors (Basel, Switzerland)
|December 17, 2024
PubMed
概括

这项研究引入了一种新方法,以每小时获得高分辨率的陆地表面温度 (LST) 数据. 这种方法结合了卫星数据,以更好地监测气候和水平衡.

关键词:
中国的地球静止气象卫星.土地表面的温度 地表的温度多尺度的极地轨道卫星.时间空间融合模型

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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Last Updated: Jun 4, 2025

Surface Renewal: An Advanced Micrometeorological Method for Measuring and Processing Field-Scale Energy Flux Density Data
09:55

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Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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科学领域:

  • 地球和环境科学 地球和环境科学
  • 遥感 遥感 遥感 遥感
  • 气候科学 气候科学

背景情况:

  • 土地表面温度 (LST) 对气候变化研究和水文平衡至关重要.
  • 目前的卫星LST产品难以平衡空间和时间分辨率,限制了全天候监测.
  • 需要高时空分辨率的LST数据来进行详细的城市环境分析.

研究的目的:

  • 开发和验证一个每小时检索高空间分辨率LST数据的框架.
  • 克服现有的卫星LST产品的局限性.
  • 为城市热环境监测提供有价值的数据.

主要方法:

  • 开发了一种与机器学习算法相结合的时空融合模型.
  • 该框架整合了来自中国的地球静止气象卫星和北极轨道卫星的数据.
  • 每小时采集30米分辨率的LST数据,并使用现场测量和Sentinel-3 SLSTR数据进行验证.

主要成果:

  • 拟议的框架实现了0.89°C至1.23°C的根平均平方误差 (RMSE) 与现场LST测量相比.
  • 预测的LST与Sentinel-3 SLSTR数据具有很高的一致性,RMSE在0.95°C至1.25°C之间.
  • 在西安市的验证证实了该方法在约1.33°C的准确性.

结论:

  • 开发的框架成功地每小时生成高空间分辨率的LST数据.
  • 这种方法解决了现有的卫星LST产品中的权衡问题.
  • 由此产生的每小时30米的LST数据对于城市热环境监测和气候研究非常有价值.