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相关概念视频

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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
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The human leg comprises an intricate system of muscles that facilitate the movement of feet and toes. Within this system, the muscles are categorized into the anterior, lateral, and posterior compartments, each with a unique set of muscles carrying out specific functions.
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The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
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Creep in concrete, the gradual deformation under prolonged stress, significantly impacts the integrity of structures. For reinforced concrete beams, it can be a vital design consideration, as it increases deflection, sometimes necessitating additional design measures. In columns, especially slender ones under eccentric loads, creep can cause buckling, compromising their stability. However, creep can be beneficial in indeterminate structures by mitigating stresses that arise from shrinkage,...
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When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
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影响不同阶级的形在逐渐崩的脚部.

Aly Fayed1, Vineel Mallavarapu1, Eli Schmidt1

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概括

渐进式倒塌脚变形 (PCFD) 的组件是相互连接的,除了脚. 这表明PCFD是一种复杂的三维状况,不同的脚和脚区域相互影响.

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在AAFD中,AAFD是AAFD.在PCFDD中使用PCFD.这是WBCT的WBCT.这是一个平脚,平脚.后脚的时刻 臂的时刻梅里的角度是什么意思中侧面突起,中侧面突起.中侧面揭露覆盖范围周围侧突 (peritlar subluxation) 是一种周围侧突.塔勒尔倾斜角度倾斜角度塔罗纳维库拉的覆盖角度承载着重量的CT CT.

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科学领域:

  • 整形外科 整形外科 整形外科
  • 放射学 放射学是一门学科.
  • 生物机械工程 生物机械工程

背景情况:

  • 渐进式倒塌脚形 (PCFD) 是一种复杂的,三维的疾病,影响多个脚和脚区域.
  • 五个已确定的PCFD类别之间的相互关系仍然不清楚.
  • 本研究研究了每个PCFD类别使用角测量对其他类别的影响.

研究的目的:

  • 评估每个渐进式倒塌脚形 (PCFD) 类对其他类的影响.
  • 评估与不同PCFD类相关的角测量之间的相关性.
  • 为了确定PCFD组件是否相互依赖.

主要方法:

  • 对32名被诊断患有PCFD的患者的负载CT (WBCT) 扫描进行了回顾性分析.
  • 定义并测量了5类PCFD:A类 (后脚,HMA),B类 (中脚绑架,TNCA),C类 (中柱不稳定,米里角),D类 (周围部脱,MFU) 和E类 (脚,TTA).
  • 进行了多变量分析,以比较各类测量结果,显著性设置为p < 0.05.

主要成果:

  • 类A (后脚) 与类C (中柱不稳定性) 强烈相关 (ρ=0.71).
  • 类B (中脚绑架) 和类D (周围突变) 显示出实质性的正相关性 (ρ=0.74).
  • 类C与类A和D相关,而类D与类B和C相关. 类E (关节) 与类B,C或D没有显著的相关性.

结论:

  • 渐进式倒塌脚变形 (PCFD) 的组成部分是相互关联的,除了脚 (E类).
  • 对于PCFD类的放射测量表明了显著的相互影响,支持了复杂的三维变形模型.
  • 这些发现表明,PCFD表面上独立的特征可能相互联系,影响治疗策略.