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相关概念视频

Bending of Curved Members - Strain Analysis01:14

Bending of Curved Members - Strain Analysis

136
The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...
136
Deformations in a Symmetric Member in Bending01:18

Deformations in a Symmetric Member in Bending

166
When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...
166
Space Trusses: Problem Solving01:29

Space Trusses: Problem Solving

589
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. Due to its adaptability and capacity to withstand complex loads, the space truss is widely used in various construction projects.
Consider a tripod consisting of a tetrahedral space truss with a ball-and-socket joint at C. Suppose the height and lengths of the horizontal and vertical...
589
Space Trusses01:25

Space Trusses

792
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
792
Plotting of Topographic Maps01:29

Plotting of Topographic Maps

47
Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
47
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

112
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
112

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Updated: Jul 4, 2025

3D Modeling of Dendritic Spines with Synaptic Plasticity
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适应式支线表面装配随意拓控制网格

Yi-Bo Kou, Yi-Fei Feng, Li-Yong Shen

    IEEE transactions on visualization and computer graphics
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    概括
    此摘要是机器生成的。

    本研究提出了一种使用G-NURBS复杂的三角形网格重建spline表面的新方法. 这种方法精确地保留了几何特征,控制点较少,推进了计算机辅助设计.

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    科学领域:

    • 计算机辅助设计和工程
    • 几何建模的几何建模.
    • 表面重建的重建.

    背景情况:

    • 从任意的拓三角形网格中重建spline表面是一个重大挑战.
    • 现有的方法难以处理复杂的网状拓,并保持尖的特征.

    研究的目的:

    • 引入一种使用G-NURBS用于任意拓三角形网格的新型表面装配方法.
    • 为了达到高的准确度,同时保持边缘和角落等几何特征.
    • 为了减少表面重建所需的控制点的数量.

    主要方法:

    • 使用通用非统一的理性B-Splines (G-NURBS) 进行表面装配.
    • 采用基于输入模型几何学的自适应控制点调整.
    • 实施一个参数对应方法,用于尖的特征.
    • 使用控制网的代改进与几何特征信息.

    主要成果:

    • G-NURBS方法成功地从具有任意拓的网格中重建了线条表面.
    • 该方法精确地保留了利的几何特征,包括边缘和角落.
    • 与传统方法相比,需要更少的控制点,提高效率.
    • 对各种CAD模型的评估表明,它们具有很高的适配精度和特征保存.

    结论:

    • 提出的基于G-NURBS的方法提供了一个有效的解决方案,用于从复杂的三角网格中重建spline表面.
    • 这种方法提高了计算机辅助设计和工程应用的精度和效率.
    • 通过减少控制点数量,可以实现对几何特征的忠实保存.