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相关概念视频

IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

879
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
879

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高灵敏的中红外甲遥感器使用深度神经网络过器.

Senyuan Wang, Shicheng Yang, Shouzheng Zhu

    Optics express
    |April 4, 2024
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    概括
    此摘要是机器生成的。

    一个新的甲远程传感器使用可调节的激光和先进的过来准确测量大气气体度. 这一创新系统为环境监测提供了高度灵敏和稳定的检测.

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    科学领域:

    • 环境科学 环境科学
    • 光学工程是指光学工程.
    • 频谱学是一种光谱学.

    背景情况:

    • 甲是一种强大的温室气体,需要精确的大气监测.
    • 遥感为测量大面积的气体度提供了一种非侵入性方法.
    • 传统的过技术可以限制甲检测系统的灵敏度.

    研究的目的:

    • 开发一种具有增强灵敏度和稳定性的新型中红外甲遥感器.
    • 使用可移动平台进行多功能大气监测.
    • 通过使用深度学习来改善信号无声化,以获得更准确的测量.

    主要方法:

    • 一个3.291μm的交带级联激光器 (ICL) 与波长调制光谱 (WMS) 的集成.
    • 实现同轴,可视化的光学布局,以最小的能量损失.
    • 使用深度神经网络 (DNN) 过器来消除第二波 (2f) 信号的噪声.
    • 使用反射灯作为合作目标,用于远距离测量,直至100米.

    主要成果:

    • 在1秒平均时间内达到86.62ppb甲的检测极限 (LOD),在DNN过后的平均时间提高到12.03ppb,平均时间为229秒.
    • 通过24小时的户外连续监控,表现出高灵敏度和稳定性.
    • 与传统的过方法相比,DNN过器显著提高了性能.

    结论:

    • 拟议的甲远程传感器为高灵敏度大气监测提供了一种新且有效的解决方案.
    • 集成DNN过提高了检测极限和稳定性.
    • 该系统适用于长期,现实世界的环境监测应用.