相关实验视频

Updated: Mar 10, 2026

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

电子衍射模式的校准样本自由扭曲校正使用深度学习

Matthew R C Fitzpatrick¹, Arthur M Blackburn¹, Cristina Cordoba¹

¹Department of Physics and Astronomy, University of Victoria, BC V8W 2Y2, Canada; Centre for Advanced Materials and Related Technologies, University of Victoria, BC V8W 2Y2, Canada.

Ultramicroscopy

|March 9, 2026

概括

一个新的Python库,EMicroML,使用深度学习来纠正电子衍射模式中的光学扭曲,而不需要校准样本. 这为分析像MoS2.2这样的材料提供了方便和准确的方法.

科学领域:

材料科学材料科学材料科学
计算科学计算科学
光学是什么?光学是什么?光学是什么?

背景情况:

电子衍射模式对于材料分析至关重要,但通常会受到光学扭曲的影响.
目前用于纠正这些扭曲的方法需要校准样本或对样本反向格子的知识,增加复杂性和时间.

研究的目的:

开发一种新的深度学习框架,用于测量和纠正电子衍射模式中的多重光学扭曲.
消除在扭曲校正中需要单独的校准样本的需要.

主要方法:

开发了具有深度学习模型的Python库EMicroML.
训练并测试了DL模型在MoS2在无形碳上的人工扭曲的融合束电子衍射 (CBED) 模式上,使用多切片模拟.
将DL方法与辐射梯度最大化 (RGM) 技术进行了比较.

主要成果:

在没有样本知识的情况下,DL方法有效地纠正针,螺旋,圆和抛物线扭曲.
在CBED模式中的中型和大型重叠磁盘中,DL方法比RGM表现优越.
此外,DL框架在改进图形图形重建和纠正实验选择区域电子衍射模式方面也具有实用性.

结论:

在电子衍射中,EMicroML提供了一种方便而准确的解决方案来纠正光学扭曲.
深度学习方法比传统方法有了显著的进步,特别是对于复杂的衍射模式.
该工具提高了电子显微镜数据分析的可靠性和效率.

关键词:

这就是为什么CBED是CBED.深度学习是一种深度学习.纠正扭曲的纠正扭曲的纠正电子衍射的电子衍射方式图形图形 (Ptychography) 是一种图形图形,用于绘制图像.一种种植的种子.

更多相关视频

$Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples$ 10:12

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

Published on: June 19, 2018

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Published on: February 23, 2017

相关概念视频

X-ray Crystallography

X-ray Crystallography

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...

$X-ray Diffraction of Biological Samples$ 01:10

X-ray Diffraction of Biological Samples

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...