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相关概念视频

Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...

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相关实验视频

Updated: Jun 19, 2026

Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
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使用莫伊尔地形学对护骨翼的定量分析.

Nathan S Lanham, Rifat Ahmed, H Rachel Park1

  • 1Columbia University, Department of Biomedical Engineering, New York, NY, USA.

The archives of bone and joint surgery
|October 31, 2024
PubMed
概括
此摘要是机器生成的。

这项研究使用莫伊尔地形学 (MT) 量化表征了头骨翼. 新的MT方法在模拟场景中成功识别了头皮翼,为肩膀评估提供了一个新的工具.

关键词:
莫伊尔的地形图形是莫伊尔的地形.在量化方面,它是有数量的.头骨的运动障碍甲骨架的翅膀是没有翅膀的

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科学领域:

  • 生物力学 生物力学
  • 医疗成像医学成像
  • 整形外科 整形外科 整形外科

背景情况:

  • 肩翼是影响肩部功能的一种情况.
  • 莫伊尔拓 (MT) 已被用于定性地进行状翼的评估.
  • 需要一种基于MT的定量方法来分析头骨翼.

研究的目的:

  • 用一种新的莫伊尔拓学 (MT) 方法量化表征状翅膀.
  • 为了验证MT方法测量头突出部的准确性.

主要方法:

  • 在10名健康受试者身上分析了20个肩膀.
  • 使用手后背 (HBB) 和加权的脚协议模拟的脚翼.
  • 已验证的MT与已知尺寸的校准和控制对象.

主要成果:

  • 在两个模拟飞翼组 (P=0.0004和P=0.0178) 中,发现了额头骨尺寸的显著差异.
  • 脚翼在HBB位置和脚的较低度 (<60°) 中最为突出.

结论:

  • 用新型的MT方法,可以对状翅膀的定量表征.
  • 这项技术在肩部升高的较低度确定了头骨翼.
  • 未来的研究应该探索肩部病理患者的实时,多平面分析.