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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

407
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...
407
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

471
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...
471
Improving Translational Accuracy02:07

Improving Translational Accuracy

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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
11.4K
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

370
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...
370
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...
225
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

341
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...
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相关实验视频

Updated: Jul 12, 2025

A Methodology for Capturing Joint Visual Attention Using Mobile Eye-Trackers
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A Methodology for Capturing Joint Visual Attention Using Mobile Eye-Trackers

Published on: January 18, 2020

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多对象行人跟踪使用改进的YOLOv8和OC-SORT.

Xin Xiao1, Xinlong Feng1

  • 1College of Mathematics and Systems Science, Xinjiang University, Urumqi 830046, China.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
概括
此摘要是机器生成的。

这项研究通过使用先进技术改进YOLOv8物体检测模型来增强自动驾驶的行人跟踪. 优化的模型实现了更高的准确性和效率,大大提高了基准数据集的性能.

关键词:
幽灵网 (GhostNet) 是一个幽灵网络.这就是OC-SORT.这就是YOLOv8的意义.多对象行人跟踪系统对象检测检测对象检测对象检测

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Trajectory Data Analyses for Pedestrian Space-time Activity Study
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相关实验视频

Last Updated: Jul 12, 2025

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Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
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科学领域:

  • 计算机视觉 计算机视觉
  • 机器人技术 机器人技术 机器人技术
  • 人工智能的人工智能

背景情况:

  • 多对象行人跟踪对于自动驾驶系统至关重要.
  • 准确的环境感知依赖于强大的行人跟踪.

研究的目的:

  • 为自动驾驶开发一个全面的行人跟踪方法.
  • 提高行人检测和跟踪算法的效率和准确性.

主要方法:

  • 在Crowdhuman数据集上训练了一种改进的YOLOv8物体检测模型.
  • 集成了包括softNMS,GhostConv和C3Ghost模块在内的先进技术.
  • 增强的YOLOv8模型与用于行人跟踪的OC-SORT跟踪算法相结合.

主要成果:

  • 精度增加了3.38%,mAP@0.5:0.95增加了3.07%,参数减少了39.98%.
  • 模型尺寸减少了37.1%,从而实现了更有效的检测.
  • 在MOT17上,HOTA达到了49.92%和MOTA达到了56.55%;在MOT20上,HOTA达到了48.326%和MOTA达到了61.077%.

结论:

  • 拟议的方法显著提高了行人检测的准确性和效率.
  • 集成的YOLOv8和OC-SORT系统在复杂的跟踪场景中表现出卓越的性能.
  • 这项工作有助于更可靠的自动驾驶感知系统.