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相关概念视频

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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
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相关实验视频

Updated: Sep 10, 2025

Pore-scale Imaging and Characterization of Hydrocarbon Reservoir Rock Wettability at Subsurface Conditions Using X-ray Microtomography
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通过灰度共发生矩阵的纹理属性改进电阻图解

John McKnight1, Heather Bedle1, Sina Saneiyan2,3

  • 1School of Geosciences, The University of Oklahoma, Norman, OK, USA.

Scientific reports
|August 22, 2025
PubMed
概括

这项研究使用灰度共发生矩阵 (GLCM) 的纹理属性来增强电阻断层扫描 (ERT) 的解释. 在复杂的地质环境中,GLCM改善了地下粘土边界和地下水区的划定.

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科学领域:

  • 地质学
  • 水文地质学
  • 图像分析

背景情况:

  • 电阻断层扫描 (ERT) 对于地下成像至关重要,但由于反转的光滑边界,解释往往模糊.
  • 对于地下水勘探来说,划定粘土边界至关重要,但传统的ERT方法在异质环境中难以做到这一点.

研究的目的:

  • 应用灰色级别共发生矩阵 (GLCM) 的纹理属性来增强 ERT 的解释.
  • 提高地下水表征的准确性,特别是对地下水资源的评估.

主要方法:

  • 一个100×100米的3DERT调查的分析.
  • 应用三个GLCM纹理属性:平均值,变量和值.
  • 集成GLCM属性与传统的ERT逆转.

主要成果:

  • GLCM 减少反转平滑,改善粘土边界和镜片形态的定义.
  • GLCM变异发现了一个以前模糊的到达表面的充电区域.
  • GLCM Entropy 增强了粘土单位和地下水库之间的对比度,有助于水层和限制层的区分.

结论:

  • 在异质沉积物环境中,GLCM的纹理分析显著提高了ERT的解释.
  • 这种工作流提供了从电阻数据中获得的有价值的额外纹理信息,以改进地下表征.
  • 该方法显示了地下水资源评估和管理的巨大潜力.