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相关概念视频

Multimachine Stability01:25

Multimachine Stability

153
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
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Bootstrapping01:24

Bootstrapping

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The term "bootstrap" originated in the 19th century as a metaphor for self-improvement or achieving something independently, without external assistance. This concept extends to statistical bootstrapping, a self-contained method for estimating population parameters through resampling, even though it can be computationally intensive. Developed by the American statistician Dr. Bradley Efron in 1979, bootstrapping provides a robust way to perform inference when the original sample size is...
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Virtual Work01:20

Virtual Work

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The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
834
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

384
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.
Next,...
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Vaporization01:18

Vaporization

34.6K
The physical form of a substance changes by changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. For vaporization to occur, kinetic energy must be greater than the intermolecular forces that keep molecules bonded. The amount of energy needed to vaporize a quantity of liquid at a given pressure and a constant temperature is called the heat of vaporization. When...
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Machines01:19

Machines

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Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
A free-body diagram of the...
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Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality
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快速启动的低延迟的云虚拟现实

Yuqi Zhou, Voicu Popescu

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    此摘要是机器生成的。

    像CloVR这样的云虚拟现实系统通过向服务器卸载染来增强虚拟现实 (VR). 这使得详细的虚拟环境 (VE) 能够实现快速加载和用户的低延迟.

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    科学领域:

    • 计算机科学 计算机科学
    • 人与计算机的交互
    • 虚拟现实 虚拟现实 虚拟现实

    背景情况:

    • 虚拟现实 (VR) 头显具有有限的染能力,限制了虚拟环境 (VE) 的复杂性和规模.
    • 云虚拟现实提供了一个解决方案,利用服务器端对VR客户端的辅助,使更复杂的VE成为可能.
    • 现有的云虚拟现实系统面临着加载时间和延迟的挑战,特别是在初始会话或VE内的用户移动期间.

    研究的目的:

    • 介绍CloVR,一个云虚拟现实系统,旨在克服VR头显的染限制.
    • 为了在大型和详细的 VE 中实现快速加载时间和低延迟交互.
    • 通过用户研究来验证CloVR的性能好处.

    主要方法:

    • 开发了CloVR,这是一个云虚拟现实系统,使用近距离分区来在服务器上创建一个紧的VE表示.
    • 服务器将遥远的 VE 区域染成环境地图,并将其与近区域几何形状传送给客户端.
    • 客户端在本地染具有低延迟的高质量,逐渐扩展附近区域,同时保持视觉连续性.

    主要成果:

    • CloVR显著减少了VE加载时间,并为VR应用提供了低延迟染.
    • 靠近区域的逐步扩展确保了在导航和交互期间的无用户体验.
    • 一项使用Quest 2耳机和笔记本电脑服务器的8名参与者的用户研究表明,CloVR的有效性与2500万个三角形 VE.

    结论:

    • 通过利用基于云的处理,CloVR有效地解决了VR头显的染限制.
    • 该系统在启动时间和交互延迟方面提供了实质性的改进,增强了VR用户体验.
    • CloVR的架构适用于需要复杂和大规模虚拟环境的协作VR应用程序.