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相关概念视频

UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

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In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
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Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
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Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
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Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels.  Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
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Emission Spectra02:39

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When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
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UV–Vis Spectrometers01:14

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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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考虑AM0G和AM1.5G的太阳光谱仿真算法

Junjie Yang1, Guoyu Zhang1,2,3, Bin Zhao1

  • 1School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China.

Sensors (Basel, Switzerland)
|March 17, 2025
PubMed
概括

本研究介绍了LED太阳能模拟器的新算法,以准确复制AM0G和AM1.5G太阳光谱. 开发的方法实现了高精度的太阳光谱重建,提高了太阳能系统的效率.

关键词:
这是一个LED太阳能模拟器.多目标遗传算法多目标遗传算法神经网络的神经网络的神经网络太阳光的光谱.频谱模拟的使用方法

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科学领域:

  • 可再生能源工程可再生能源工程
  • 光伏技术 光伏技术
  • 光学工程是指光学工程.

背景情况:

  • LED太阳能模拟器在 AM0G 和 AM1.5G 太阳光谱的精确光谱模拟方面遇到了困难.
  • 现有的方法缺乏先进太阳能研究和开发所需的精度.

研究的目的:

  • 为LED太阳光光谱模拟算法开发一种新的框架,能够准确地表示AM0G和AM1.5G光谱.
  • 建立一个分析和提高太阳光谱重建质量的基础.

主要方法:

  • 开发了一个非主导排序基因算法II (NSGA-II) 辅助长期短期记忆 (LSTM) 神经网络策略.
  • 集成了一个多目标遗传算法用于训练数据集生成,使用6500K黑体曲线和窄带LED光谱数据.
  • 使用根平均平方误差 (RMSE) 作为LSTM模型的评估函数.

主要成果:

  • 通过分析和选择29个窄带LED,生成了5000个太阳光谱模拟培训数据集.
  • 获得的光谱匹配精度为AM0G的±10.5%,AM1.5G的±9.3%.
  • 经过训练的LSTM模型符合太阳光谱重建的A+级模拟标准.

结论:

  • 该研究为高精度太阳光谱重建提供了理论基础和技术进步.
  • 这些发现对于提高太阳能系统的效率和准确性具有实际意义.
  • 这项研究预计将推动开发更复杂的太阳能模拟器.