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相关概念视频

X-ray Crystallography02:18

X-ray Crystallography

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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...
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X-ray Diffraction of Biological Samples01:10

X-ray Diffraction of Biological Samples

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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...
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相关实验视频

Updated: Jul 1, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

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合理化衍射计算,以提供高精度和高速度,使用少量位数.

Soma Fujimori, Tomoyoshi Ito, Tomoyoshi Shimobaba

    Journal of the Optical Society of America. A, Optics, image science, and vision
    |March 4, 2024
    PubMed
    概括

    这项研究引入了一种新的几位衍射计算方法. 它在没有近似的情况下实现了高精度和速度,甚至在苛刻的场景中也超过了传统技术.

    科学领域:

    • 计算物理学的计算物理.
    • 光学是什么?光学是什么?光学是什么?
    • 数字方法 数字方法.

    背景情况:

    • 少数位衍射计算提供了计算优势,如速度和减少内存使用.
    • 传统的少数位方法往往会因为数据截断而牺牲准确性.
    • 弗雷尼尔衍射是准确的,但受到对轴近似的限制.

    研究的目的:

    • 开发一种高精度,无近似的少数位衍射计算方法.
    • 为了克服现有的少位衍射技术的精度限制.
    • 在资源有限的环境中实现高效和精确的衍射计算.

    主要方法:

    • 提出的方法是通过合理化标准衍射公式的计数器来得出的.
    • 它避免了近似,与弗雷内尔衍射不同.
    • 该技术是为少位格式 (例如,单精度浮点) 设计的.

    主要成果:

    • 这种新的方法可以实现高精度,没有近似值.
    • 与传统方法相比,它表现出优越的性能,即使是那些需要双重精度的方法.
    • 当使用单精度格式时,可以观察到更快的计算时间.

    结论:

    更多相关视频

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    High Pressure Single Crystal Diffraction at PX^2

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

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    相关实验视频

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    • 一种强大而准确的少位衍射计算方法已经成功开发出来.
    • 这种方法消除了对近似的需求,并提高了精度.
    • 该方法为高效和准确的衍射计算提供了显著的进步.