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相关概念视频

Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
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The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
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计算机模拟的 TOUCH 假肢杯错位和解决方案.

Kevin Knappe1, Mareike Schonhoff2, Sebastian Jaeger2

  • 1Department of Orthopaedics, Heidelberg University Hospital, Heidelberg, Germany.

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概括
此摘要是机器生成的。

对形甲关节骨关节炎的全关节置换杯进行检查至关重要. 计算机模拟显示,使用尺寸10的形杯子,可能与骨头移植一起,为错位或倾斜的杯子提供了最好的修改选项.

关键词:
大指的基本关节的关节整形手术.这是一个CMC 1假肢.末端假肢关节置换,计算机辅助设计第一个 carpometacarpal关节关节炎.手的骨关节炎手的骨关节炎在手术内修复杯.梯形甲手腕关节关节炎的关节炎.形甲手臂骨关节炎形甲手腕假肢是一个形甲手腕假肢.

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科学领域:

  • 整形外科手术 整形外科手术
  • 生物医学工程 生物医学工程
  • 植入物设计 植入物设计

背景情况:

  • 全关节置换对于晚期的形甲手关节骨关节炎越来越常见.
  • 双流动性假肢在短期到中期提供了良好的功能效果.
  • 正确的杯子放置对于稳定性和防止脱位至关重要.

研究的目的:

  • 模拟和分析错位全关节置换杯的手术内修复选项.
  • 根据缺陷区域和骨接触来确定最好的杯型和尺寸进行修改.

主要方法:

  • 现有的球形和形杯子 (尺寸为9mm和10mm) 的计算机辅助设计 (CAD) 模型被利用.
  • 模拟分析了倾斜或错位杯子的修订结果.
  • 缺陷区域和骨接触区域是评估修改策略的关键指标.

主要成果:

  • 一个大小9的形杯子可以被一个大小9的球形杯子所取代,如果它正确的中心.
  • 一个尺寸9的球形杯子需要一个尺寸10的杯子进行修改.
  • 对于倾斜或错位的大小9杯,一个大小10的形杯,有时有骨头移植,提供最大的骨接触面积.

结论:

  • 计算机模拟为在全关节置换中进行手术内杯体修复提供了指导.
  • 修改策略取决于杯子的大小,形状和错位的类型.
  • 在临床应用之前,建议使用解剖样本进行进一步验证.