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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

194
Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
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Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
341
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

296
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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Updated: Jun 7, 2025

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代算法计算光谱仪基于单层隐藏神经网络.

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    此摘要是机器生成的。

    这项研究通过将代算法与神经网络相结合来增强计算光谱仪. 这种混合方法提高了光谱重建的准确性,以实现更快,高精度的现场测量.

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    科学领域:

    • 频谱学是一种光谱学.
    • 计算成像技术的成像
    • 机器学习 机器学习

    背景情况:

    • 计算光谱仪在超光谱检测中提供了有前途的应用.
    • 代算法能够实现硬件集成和现场测量,但由于存在错误的问题,它们在重建准确性方面存在困难.
    • 神经网络提供高精度的光谱重建,但需要大量的计算资源,阻碍了集成到嵌入式系统.

    研究的目的:

    • 为了提高基于代算法的计算光谱仪的重建精度.
    • 利用神经网络来缓解光谱重建问题的不良性质.
    • 通过使用计算光谱仪实现快速,高精度的现场测量.

    主要方法:

    • 在公共数据集上使用代算法进行光谱重建.
    • 训练了一个单层隐藏神经网络,将代重建结果映射到原始光谱.
    • 通过模拟和实验结果验证了混合方法.

    主要成果:

    • 提出的方法有效地缓解了代光谱重建中的不良问题.
    • 神经网络集成显著提高了计算光谱仪的重建精度.
    • 该方法证明了低计算资源要求,适合嵌入式系统.

    结论:

    • 将神经网络与代算法结合起来,可以提高计算光谱仪的性能.
    • 这种混合型号为实现高精度的现场光谱测量提供了可行的解决方案.
    • 这项研究有可能推动超光谱检测技术的发展.