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相关概念视频

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples10:12

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We describe a beamline setup meant to carry out rapid two-dimensional x-ray fluorescence and x-ray microdiffraction mapping of single crystal or powder samples using either Laue (polychromatic radiation) or powder (monochromatic radiation) diffraction. The resulting maps give information about strain, orientation, phase distribution, and plastic deformation.
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Physical Properties Of Minerals II: Polymineralic Analysis07:16

Physical Properties Of Minerals II: Polymineralic Analysis

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Source: Laboratory of Alan Lester - University of Colorado Boulder
The physical properties of minerals include various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. These properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure.
This video examines several physical properties that are useful in field and hand sample mineral...
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Presented here is a protocol for cell culture on silicon nitride membranes and plunge-freezing prior to X-ray fluorescence imaging with a synchrotron cryogenic X-ray nanoprobe. When only room temperature nano-analysis is provided, the frozen samples can be further freeze-dried. These are critical steps to obtain information on the intracellular elemental...
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In this work, we describe the use of the atom-probe tomography technique for studying the grain boundaries of the absorber layer in a CIGS solar cell. A novel approach to prepare the atom probe tips containing the desired grain boundary with a known structure is also presented...
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Mime is a flexible computational framework to construct a machine learning-based integration model with elegant performance. Here, we provide a detailed step-by-step procedure for developing predictive models with high accuracy, leveraging complex datasets to identify critical genes associated with disease progression, patient outcomes, and therapeutic response.
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The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction...
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相关实验视频

Updated: Jan 20, 2026

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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以物理为基础的机器学习分析,用于通过同步机 Laue 微微衍射的纳米尺度谷物映射.

Ka Hung Chan1,2, Xinyue Huang1, Nobumichi Tamura2

  • 1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong.

Journal of applied crystallography
|January 19, 2026
PubMed
概括
此摘要是机器生成的。

一种新的基于物理的机器学习 (PIML) 方法增强了同步龙X射线微差别. 这种方法实现了纳米晶体的纳米粒度映射分辨率,克服了以前的局限性.

关键词:
在X射线晶体学.谷物映射 谷物映射 谷物映射纳米晶体是一种纳米晶体.基于物理的机器学习.同步机 劳埃微微差分的微差分

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Published on: June 19, 2018

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 对先进材料来说,确定纳米晶体的特性至关重要.
  • 同步射线X射线Laue微分歧是晶体结构和方向映射的关键.
  • 微微差分的空间分辨率有限,阻碍了对子束大小的颗粒进行映射.

研究的目的:

  • 开发一种新的方法,用于高分辨率的纳米晶体的粒度形态绘制.
  • 为了克服X射线微微衍射技术的空间分辨率限制.
  • 为了使纳米级材料的特征使用衍射探针.

主要方法:

  • 开发了一种基于物理的机器学习 (PIML) 方法.
  • 该PIML方法集成一个卷积神经网络与物理知情过.
  • 在金 (Au) 纳米晶体上进行了同步离子微衍射扫描.

主要成果:

  • 通过PIML方法实现了用于谷物映射的纳米分辨率.
  • 证明了精确的粒度大小,方向分布和形态的确定.
  • 结果与传统的电子反射散射衍射 (EBSD) 数据有很好的一致性.

结论:

  • 用PIML辅助的微分离成功地以纳米级分辨率映射了纳米晶粒.
  • 这种技术克服了X射线探测器尺寸对亚微米材料的限制.
  • 基于PIML的方法可以将其推广到基于衍射的其他表征方法.