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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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Deformations in a Transverse Cross Section01:21

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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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Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
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Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
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Semi-automatic Framework for Voxel Human Deformation Modeling.

Yangchun Gao1, Xu Xu2, Congsheng Li2

  • 1China Automotive Engineering Research Institute Co., Ltd, Chongqing, 401122, China.

Current Medical Imaging
|June 14, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel framework for deforming voxel human models into various poses, enhancing anatomical accuracy. The method successfully creates multi-pose models while preserving local tissue integrity, advancing medical simulation and design.

Keywords:
Human voxel modelLaplace volume refillinHuman voxel modelLaplace volume refillingmedical image morphingsmoothed rotation Enhanced As-Rigid-As-Possible

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Area of Science:

  • Medical Imaging
  • Computer Graphics
  • Biomedical Engineering

Background:

  • High-resolution voxel-based human anatomical models are valuable for medical education and design.
  • Existing models are limited by their static, upstanding posture, restricting their application.

Purpose of the Study:

  • To develop a semi-automatic framework for rapid, multi-pose human model generation.
  • To address the limitations of static anatomical models in various applications.

Main Methods:

  • Conversion of voxel models to surface models via surface reconstruction.
  • Definition of a bone-based deformation skeleton and vertex weighting using the Bone Glow algorithm.
  • Application of the Smoothed Rotation Enhanced As-Rigid-As-Possible (SR-ARAP) algorithm for pose deformation and volume-filling for tissue reconstruction.

Main Results:

  • Successfully deformed standing human models into sitting and running poses.
  • Demonstrated the framework's capability to achieve target poses accurately.
  • SR-ARAP algorithm showed superior preservation of local tissue integrity compared to the As-Rigid-As-Possible algorithm.

Conclusions:

  • A novel framework for voxel human model deformation has been proposed.
  • The method enhances local tissue integrity during pose manipulation.
  • The framework offers a versatile solution for creating dynamic, multi-pose anatomical models.