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相关概念视频

Kinematic Equations - III01:18

Kinematic Equations - III

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The first two kinematic equations have time as a variable, but the third kinematic equation is independent of time. This equation expresses final velocity as a function of the acceleration and distance over which it acts. The fourth kinematic equation does not have an acceleration term and provides the final position of the object at time t in terms of the initial and final velocities. This equation is useful when the value of the constant acceleration is unknown.
Using the kinematic equations,...
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Three-Dimensional Force System01:30

Three-Dimensional Force System

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In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
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Planar Rigid-Body Motion01:22

Planar Rigid-Body Motion

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Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
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Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

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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...
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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.
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...
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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.
Here, in order to determine the magnitude of velocity and acceleration for point...
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相关实验视频

Updated: May 5, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
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对比式学习驱动的时空空间动态自适应框架,用于风格化的3D人类运动生成.

Zhiqiang Song1, Ruyan Zhang2, Shuangjun Li1

  • 1College of Physical Education, Shandong Sport University, Jinan, China.

PloS one
|February 19, 2026
PubMed
概括
此摘要是机器生成的。

这项研究引入了一个新的框架,用于生成风格化的3D人类运动. 它通过使用对比学习和注意力机制,在动态运动中改进了当地风格的捕捉和细节.

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相关实验视频

Last Updated: May 5, 2026

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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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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:

  • 现有的3D人类运动生成方法往往忽视了当地的风格变化,导致生成的序列缺乏表现性的细节.
  • 全球时间风格统计不足以捕捉动态人类运动的细微差别.

研究的目的:

  • 为空间时空动态自适应风格化的3D人类运动生成提出一个对比的学习驱动框架.
  • 为了增强捕捉当地风格变化的能力,并改善生成3D人类运动中的表达细节.

主要方法:

  • 引入了空间注意力实例规范化 (SAIN) 和时间注意力实例规范化 (TAIN),以提取本地和全球运动风格特征.
  • 采用双路径结构来隔离运动内容和风格注入器 (SADA,TADA) 来实现细粒度风格集成.
  • 在培训期间利用了风格和内容的对比损失,以改善特征集群和分离.

主要成果:

  • 拟议的方法在Xia数据集上取得了卓越的性能,FID为0.06,准确率为96.70%,多样性为5.67,多模式性为0.97,与真实数据密切匹配.
  • 在运动风格转移任务中,该模型获得了94.11 CRA和89.41 SRA,超过了现有的最先进的方法.

结论:

  • 开发的框架有效地解开了动作风格和内容,实现了细粒度,动态自适应的风格化3D人类运动生成.
  • 对比式学习方法增强了风格的多样性和内容的真实性,产生了更具表现力和现实的人类动作.