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The Swing Equation01:21

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The Swing Equation is a fundamental tool in power system dynamics, especially for analyzing the behavior of generating units like three-phase synchronous generators. This equation emerges from applying Newton's second law to the rotor of a generator, encompassing factors such as inertia, angular acceleration, and the interplay between mechanical and electrical torques.
In a steady-state operation, the mechanical torque (Τm) supplied to the generator is balanced by the electrical torque (Τe)...
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The similarity-dissimilarity effect, a fundamental concept in social psychology, explains how interpersonal similarities and differences influence attraction and social interactions. This effect is supported by three key psychological perspectives: balance theory, social comparison theory, and consensual validation.Balance Theory and Cognitive ConsistencyBalance theory, developed by Fritz Heider, posits that individuals seek cognitive consistency in their relationships. When two people share...
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Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

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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.
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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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.
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Relative Motion Analysis using Rotating Axes - Acceleration01:22

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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.
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相关实验视频

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基于高效相似性评估的动态高尔夫球摆分析框架.

Seung-Su Lee1, Jun-Hyuk Choi1, Jeongeun Byun2

  • 1Department of Embedded Systems Engineering, Incheon National University, Incheon 22012, Republic of Korea.

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|November 27, 2025
PubMed
概括

一个新的动态运动相似度测量 (DMSM) 框架通过评估七个阶段的联合轨迹来增强高尔夫球摆分析,比传统方法提高准确性和生物力学洞察力.

关键词:
动态的摇摆运动动态的摇摆运动.高尔夫球摇摆分析运动比较,运动比较.相似之处是相似之处.

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相关实验视频

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科学领域:

  • 运动科学 运动科学 运动科学
  • 生物力学 生物力学
  • 计算机视觉 计算机视觉

背景情况:

  • 基于图像的姿势估计提供了具有成本效益的运动分析.
  • 传统的方法与高尔夫球摆的时间对齐和感知准确性作斗争.
  • 在高尔夫球摇摆运动捕捉中需要动态的,相位特定的分析.

研究的目的:

  • 引入一个动态运动相似度测量 (DMSM) 框架用于高尔夫球摇摆分析.
  • 提高运动捕获数据的感知一致性和生物机械解释性.
  • 开发基于AI的高尔夫球摇摆分析和实时反的实用基础.

主要方法:

  • 将高尔夫球摆分为七个规范阶段.
  • 评估每个阶段内共同关键点的动态轨迹.
  • 集成连续运动,规范化坐标,插曲数据,并使用数值集成用于路径差异.

主要成果:

  • DMSM显示相同和不同玩家摇摆对之间的歧视更强烈.
  • 在脊柱角度轨迹 (Δ = 38.68,p < 0.05) 中取得了显著的生物力学区别.
  • 教练的评估证实了与新框架的感知对齐.

结论:

  • DMSM提供了更可靠的相位反和生物机械可解释的运动分析.
  • 该框架在计算上是可行的,只需轻微的开销 (≈169 ms).
  • 提供了人工智能驱动的体育训练和实时反系统的实际基础.