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相关概念视频

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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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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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
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相关实验视频

Updated: Jun 25, 2025

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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通过从快照衍射模式的压缩支检测进行强大的3D相位检索.

Cheng Zhang1, Liru Zhang2, Ru Zhang2

  • 1Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei, Anhui Province, 230601, China; Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China; School of Integrated Circuits, Anhui University, Hefei, Anhui Province, 230601, China; Anhui Provincial High-performance Integrated Circuit Engineering Research Center, Anhui University, Hefei, Anhui Province, 230601, China.

Computers in biology and medicine
|May 29, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的阶段检索方法,消除了对先前支持面具知识的需求. 压缩支检测和混合输出算法 (CSD-MIPR-HIO) 可以实现高质量的重建,即使在噪音条件下.

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

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相关实验视频

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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography
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3D Imaging of Soft-Tissue Samples using an X-ray Specific Staining Method and Nanoscopic Computed Tomography

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 计算成像技术的成像
  • 阶段检索算法 阶段检索算法

背景情况:

  • 传统的多切片代阶段检索 (MIPR) 依赖于预定义的支持面罩,限制了其适用性.
  • 代停滞和先验知识的需要是当前MIPR技术的重大缺点.

研究的目的:

  • 开发一种新的多切片代阶段检索算法,消除了对支持面具信息的要求.
  • 在具有挑战性的,杂的环境中提高相位检索的稳定性和准确性.

主要方法:

  • 提出了一个压缩支持检测和混合输入输出 (CSD-MIPR-HIO) 算法.
  • 采用自适应式支罩检测从单个2D衍射强度.
  • 使用混合输出-输出代方法进行相位检索.

主要成果:

  • 成功地消除了对MIPR先验支持面具知识的需求.
  • 在噪音的情况下实现高质量的图像重建.
  • 通过数值和光学实验来证明可行性,优越性和稳定性.

结论:

  • 中央证券交易所-MIPR-HIO算法克服了传统MIPR的关键局限性.
  • 这种方法为相位检索应用提供了更通用和更强大的解决方案.
  • 在模拟和现实世界的实验环境中验证了有效性.