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相关概念视频

Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

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Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
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Accelerating Fluids01:17

Accelerating Fluids

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When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
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Turbulent Flow01:24

Turbulent Flow

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Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
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Centroid for the Paraboloid of Revolution01:16

Centroid for the Paraboloid of Revolution

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The paraboloid of revolution is an axially symmetric surface generated by rotating a parabola around its axis. This shape has several applications in mechanical engineering due to its advantageous structural properties, such as strength against stress concentration points and rotational symmetry.
The centroid for the paraboloid of revolution is the point where all the mass of the paraboloid is concentrated. This centroid is important for engineering applications, as it determines how forces are...
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Spherical Coordinates01:23

Spherical Coordinates

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Spherical coordinate systems are preferred over Cartesian, polar, or cylindrical coordinates for systems with spherical symmetry. For example, to describe the surface of a sphere, Cartesian coordinates require all three coordinates. On the other hand, the spherical coordinate system requires only one parameter: the sphere's radius. As a result, the complicated mathematical calculations become simple. Spherical coordinates are used in science and engineering applications like electric and...
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Uniform Depth Channel Flow01:27

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Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
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Novel 3D/VR Interactive Environment for MD Simulations, Visualization and Analysis
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虚拟化点云染 虚拟化点云染

Jose A Collado, Alfonso Lopez, Juan M Jurado

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    此摘要是机器生成的。

    这项研究介绍了一种GPU-culling系统,用于从遥感中处理巨大的点云. 它通过按需转移点在标准硬件上实现了巨大的数据集的实时染.

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    科学领域:

    • 计算机图形 计算机图形
    • 地理空间技术是什么
    • 遥感 遥感 遥感 遥感

    背景情况:

    • 激光雷达和其他遥感技术产生巨大的点云,往往超过GPU内存容量.
    • 管理大型点云的现有细节级别 (LoD) 技术在计算上是密集的,并且需要大量的时间来构建.
    • 处理和染极大的点云对存储和实时性能提出了重大挑战.

    研究的目的:

    • 提出一种新的GPU驱动的除系统,以高效地处理和染任意大点云.
    • 开发一个在CPU和GPU上保持低内存占用率的系统.
    • 为了实现实时操纵大规模的点云在商品硬件上的实时操作.

    主要方法:

    • 点被组织成使用希尔伯特编码排序的组,避免了在莫顿曲线中发现的问题.
    • 一个GPU驱动的杀系统确定每个的可见点,按需传输数据.
    • 漏洞填充是为了解决数据密度和LoD技术造成的空白而实施的.

    主要成果:

    • 该系统成功操纵了多达180亿个点的点云,平均达到80 FPS.
    • 实时性能保持不变,视觉质量没有明显损失.
    • 与最先进的方法相比,该方法在处理显著更大的点云方面表现出卓越的能力.

    结论:

    • 拟议的GPU驱动的除系统为实时处理庞大的点云提供了有效的解决方案.
    • 希尔伯特编码方法和按需数据传输可以在低内存硬件上操纵巨大的数据集.
    • 该系统为大规模的地理空间数据可视化和分析提供了可扩展和有效的方法.