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相关概念视频

Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Temperature Measurement Sites01:14

Temperature Measurement Sites

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...
Absorption of Radiation01:05

Absorption of Radiation

The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
Temperature Dependent Deformation01:12

Temperature Dependent Deformation

In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...

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相关实验视频

Updated: Jul 20, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices
08:29

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一个基于物理的机器学习模型,以3D描述室温半导体探测器的特征.

Srutarshi Banerjee1, Miesher Rodrigues2, Manuel Ballester3

  • 1Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA. srutarshibanerjee2022@u.northwestern.edu.

Scientific reports
|April 2, 2024
PubMed
概括

一个新的基于物理的机器学习模型在3D中对室温半导体辐射探测器 (RTSD) 进行了特征化. 这种方法模型在子像素 voxels 中充电传输特性,以提高探测器性能和先进的成像应用.

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科学领域:

  • 物理 物理学 物理
  • 材料科学 材料科学 材料科学
  • 机器学习 机器学习

背景情况:

  • 室温半导体辐射探测器 (RTSD),特别是 Telluride (CZT),对于X射线和射线检测在医学成像和天体物理学等领域至关重要.
  • 目前对RTSD的表征方法通常假定大量均性,并且缺乏详细的3D子像素分辨率,阻碍了高级事件重建.

研究的目的:

  • 引入一种新的基于物理的机器学习 (PBML) 模型,以在子像素水平上对RTSD进行详细的3D描述.
  • 为了能够精确地建模离散探测器体积的单个voxel中的电荷传输特性.

主要方法:

  • 该研究将RTSD分化为3D声元,将电荷传输现象 (漂移,捕获,脱落,重组) 建模为每个声元内的可训练重量.
  • 纳入了第二阶非线性漂移模型,以准确地表示观察到的电荷运动.
  • 使用电子孔对注射作为输入和电极信号作为输出来训练PBML模型,重量通过损失函数的反向传播来确定.

主要成果:

  • 该PBML模型成功地描述了voxelized探测器体积内的3D电荷传输特性.
  • 训练模型的重量与每个voxel的实际物理电荷传输特征建立了直接的相关性.
  • 这代表了RTSDs的第一个全面的3D电荷传输模型.

结论:

  • 开发的PBML模型为3D空间中的RTSD表征提供了前所未有的细节水平.
  • 这种方法克服了传统批量表征的局限性,为增强的子像素级别分析铺平了道路.
  • 预计这些发现将在需要高分辨率辐射检测的关键应用中提高RTSD的性能.