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相关概念视频

Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

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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...
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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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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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Velocity and Position by Graphical Method01:34

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Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
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Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

359
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...
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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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相关实验视频

Updated: Jul 4, 2025

Profiling Maternal Behavior Responses During Whole-Brain Imaging
07:12

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使用光学流量的跳跃和跳跃估计.

Lisa P Y Lin1, Sally A Linkenauger2

  • 1Department of General Psychology, Justus-Liebig University Gießen, Gießen, Germany. Pui.Lin@psychol.uni-giessen.de.

Psychonomic bulletin & review
|January 29, 2024
PubMed
概括
此摘要是机器生成的。

步行时接触到快速光流会增加人们对跳跃和跳跃的能力. 这表明视觉线索重新校准了我们对身体能力和运动预期的努力的感觉.

关键词:
光学流的光学流量感知和行动的感知和行动.感知电机校准的校准

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科学领域:

  • 感知与行动 感知与行动
  • 视觉运动控制控制
  • 生物力学 生物力学

背景情况:

  • 光学流,在自我运动过程中视觉元素的明显运动,提供了关于运动的关键信息.
  • 之前的研究表明,操纵光流-步态关系会影响距离和地形的估计.
  • 与较快的光流相比,较慢的光流与高估的努力和距离有关.

研究的目的:

  • 调查相对于行走步态的光流速度是否会影响感知到的跳跃和跳跃能力.
  • 为了确定视觉重新校准是否影响爆炸性运动的动作边界.

主要方法:

  • 参与者接受了快速或中等光流的训练,同时以恒定的速度行走.
  • 在光流暴露后,参与者估计了他们的最大跳跃和跳跃距离.
  • 一个实验对象之间的设计比较了快速和中等光流条件之间的性能.

主要成果:

  • 暴露于快速光流的个体报告说,与暴露于中度光流的人相比,他们估计的跳跃和跳跃能力更大.
  • 这些发现表明光流校准对感知到的物理能力有很大的影响.

结论:

  • 在光流和步行速度之间进行重新校准,可以为跳跃等运动定义动作界限.
  • 改变光学流速可能会改变预期的移动力,从而影响跳跃和跳跃的感知行动能力.