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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

25.6K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
25.6K
X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

4.6K
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
4.6K

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相关实验视频

Updated: Dec 29, 2025

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
11:48

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

Published on: April 24, 2018

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使用机器学习在电子衍射中确定晶体对称性

Kevin Kaufmann1, Chaoyi Zhu2, Alexander S Rosengarten1

  • 1Department of NanoEngineering, University of California, San Diego, La Jolla, CA 92093, USA.

Science (New York, N.Y.)
|February 1, 2020
PubMed
概括
此摘要是机器生成的。

我们开发了一种自动化的机器学习方法, 这种方法可以快速,自主地识别相位,从而推进EBSD作为高通量技术.

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Microcrystallography of Protein Crystals and In Cellulo Diffraction
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Microcrystallography of Protein Crystals and In Cellulo Diffraction

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Microcrystal Electron Diffraction of Small Molecules
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Microcrystal Electron Diffraction of Small Molecules

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相关实验视频

Last Updated: Dec 29, 2025

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
11:48

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

Published on: April 24, 2018

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Microcrystallography of Protein Crystals and In Cellulo Diffraction
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Microcrystallography of Protein Crystals and In Cellulo Diffraction

Published on: July 21, 2017

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Microcrystal Electron Diffraction of Small Molecules
09:48

Microcrystal Electron Diffraction of Small Molecules

Published on: March 15, 2021

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科学领域:

  • 材料科学
  • 晶体学
  • 机器学习

背景情况:

  • 电子反射散射 (EBSD) 对于晶体结构的确定至关重要,但需要手动输入用于相位识别.
  • 由于依赖于人类的解释,目前的EBSD方法并没有优化高吞吐量分析.

研究的目的:

  • 从EBSD模式中快速和自主识别晶体对称性的一般方法.
  • 为了实现自动化阶段识别,将EBSD转化为高通量技术.

主要方法:

  • 使用基于机器学习的方法来分析EBSD模式.
  • 开发了一个用于自主晶体对称识别的神经网络算法.

主要成果:

  • 该算法成功地从EBSD模式中识别了晶体对称性.
  • 在未包括在训练组中的衍射模式上评估算法的性能.
  • 神经网络优先考虑的对称性特征与晶体学家的分析一致.

结论:

  • 开发的机器学习方法有助于自主识别EBSD阶段.
  • 这种方法显著提高了EBSD作为高通量表征技术的潜力.