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相关概念视频

Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

425
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
425
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

490
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
490
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

396
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
396
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

243
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
243
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

385
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
385
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

357
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
357

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相关实验视频

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Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
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通过关系聚合图形网络和时间模式推理,通过高效的运动捕捉数据恢复.

Chuanqin Zheng1, Qingshuang Zhuang1,2, Shu-Juan Peng2

  • 1Information Center, Xiamen Medical College, Xiamen, China.

Mathematical biosciences and engineering : MBE
|June 16, 2023
PubMed
概括

本研究引入了一种有效的方法来恢复丢失的人类运动捕捉 (mocap) 数据,使用一种新的关系聚合图形网络和时间模式推理 (RGN-TPR) 框架,显著提高动画现实性.

科学领域:

  • 计算机视觉 计算机视觉
  • 人工智能的人工智能
  • 计算机图形 计算机图形

背景情况:

  • 人类运动捕捉 (mocap) 数据对于逼真的角色动画至关重要.
  • 由于遮蔽或脱落,缺少光学标记数据会阻碍现实世界中的mocap应用.
  • 现有的mocap数据恢复方法面临着关节复杂性和长期运动依赖性的挑战.

研究的目的:

  • 提出一种高效有效的方法来恢复丢失的人类运动捕捉数据.
  • 解决当前处理复杂的关节运动和时间依赖的方法的局限性.
  • 提高mocap数据在动画和相关领域的性能和可靠性.

主要方法:

  • 开发了一个关系聚合图形网络 (RGN) 与本地图形编码器 (LGE) 和全球图形编码器 (GGE) 来编码骨架结构和关系.
  • 实施时间模式推理 (TPR),使用自我注意力和时间变换器来捕捉框架内和长期依赖.
  • 将LGE,GGE和TPR集成到RGN-TPR框架中,用于全面的时空特征提取.

主要成果:

  • 与最先进的方法相比,RGN-TPR框架在mocap数据恢复方面表现优越.
  • 对公共数据集进行了广泛的实验,验证了拟议方法的定性和定量有效性.
关键词:
在mocap数据恢复的过程中,关系聚合图形网络的关系聚合图形网络.自我注意力机制机制时间模式推理时间模式推理

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Last Updated: Jul 26, 2025

Three-Dimensional Finger Motion Tracking during Needling: A Solution for the Kinematic Analysis of Acupuncture Manipulation
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  • 该方法成功地恢复了缺失的运动数据,提高了mocap序列的准确性和完整性.
  • 结论:

    • RGN-TPR框架为人类运动捕捉数据恢复提供了高效和强大的解决方案.
    • 拟议的方法有效地解决了关节复杂性和长期依赖运动数据的挑战.
    • 这项工作有助于推进现实的角色动画和其他依赖于准确的mocap数据的应用程序.