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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...
1.6K

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相关实验视频

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ST-Phys:无监督的空间时间对比远程生理测量

Mingyue Cao, Xu Cheng, Xingyu Liu

    IEEE journal of biomedical and health informatics
    |May 14, 2024
    PubMed
    概括

    这项研究介绍了ST-Phys,这是一种使用面部视频的无监督方法,用于使用面部视频的远程光电显微镜 (rPPG). 它通过增强时空特征利用,提高了低光和噪音条件下的精度.

    科学领域:

    • 生物医学工程 生物医学工程
    • 计算机视觉 计算机视觉

    背景情况:

    • 远程光电显微镜 (rPPG) 可以从面部视频中进行非接触性生理测量.
    • 目前的rPPG方法通常依赖于带有大型标记数据集的监督学习.
    • 现有的无监督的rPPG技术与时空特征以及低光和噪音等环境挑战作斗争.

    研究的目的:

    • 开发一种无监督的对比学习方法,用于强大的rPPG信号提取.
    • 解决现有无监督方法在处理低光和噪音环境中的局限性.
    • 改进时空特征的利用,以准确地测量生理参数.

    主要方法:

    • 建议ST-Phys,一个无监督的对比学习框架,用于rPPG.
    • 包含一个低光增强模块,时间扩展模块和空间增强模块.
    • 引入了一个循环边际损失,以吸引来自相同视频的信号,并从不同的视频中排斥.

    主要成果:

    • 与最先进的无监督rPPG方法相比,ST-Phys在六个数据集 (RGB和NIR) 中表现出更高的性能.
    • 该方法在处理随机低光条件和长期依赖方面取得了显著的改进.
    • 在降低参数和提高抗噪声强度方面取得了优势.

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    Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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    Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation

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    Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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    结论:

    • ST-Phys为准确的rPPG测量提供了一个有希望的无监督方法,特别是在具有挑战性的环境中.
    • 拟议的模块和损失函数有效地提高了时空特征提取和信号质量.
    • 这种方法通过提高噪声稳定性和减少计算参数来推进无监督的rPPG.