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相关概念视频

Velocity and Position by Integral Method01:13

Velocity and Position by Integral Method

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If acceleration as a function of time is known, then velocity and position functions can be derived using integral calculus. For constant acceleration, the integral equations refer to the first and second kinematic equations for velocity and position functions, respectively.
Consider an example to calculate the velocity and position from the acceleration function. A motorboat is traveling at a constant velocity of 5.0 m/s when it starts to decelerate to arrive at the dock. Its acceleration is...
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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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Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Position-effect Variegation02:32

Position-effect Variegation

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In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
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Position and Displacement01:31

Position and Displacement

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The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
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Serial Position Effect01:03

Serial Position Effect

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The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...
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相关实验视频

Updated: Feb 7, 2026

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
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在混乱的物流中对包裹分类中的定位方法的研究.

Yu Han1,2, Fengshou Zhang3, Aohui He1

  • 1School of Mechanical Engineering, Henan University of Science and Technology, Luoyang, 471000, China.

Scientific reports
|February 5, 2026
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种3D视觉算法,用于在自动排序中精确地定位物流包裹. 新方法准确地确定包装中心点和方向,改善无序堆叠的料过程.

关键词:
包装分类 包装分类三维视觉视觉是一个三维视觉.定位方法定位方法.没有订单的物流包裹.

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相关实验视频

Last Updated: Feb 7, 2026

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科学领域:

  • 机器人和自动化 机器人和自动化
  • 计算机视觉 计算机视觉
  • 物流 技术 技术 物流 技术

背景情况:

  • 自动化物流包裹分类面临着无序堆叠的挑战.
  • 精确的包装定位对于有效地输入分类设备至关重要.

研究的目的:

  • 开发和验证3D视觉算法,用于确定无序堆中的空间物流包的位置和态度.
  • 为了提高自动分拣设备的料过程.

主要方法:

  • 一个新的算法使用3D视觉来计算三个点的正常向量和投影来确定中心点的位置.
  • 算法的数学建模,包括正常向量计算和中心点态度的确定.
  • 实验验证使用双激光来确定中心点和双探头来确定空间姿势,与3D视觉系统,工业机器人和PC集成.

主要成果:

  • 该算法成功地获得了无序堆中物流包裹的物理和几何中心的位置和态度信息.
  • 最大定位错误为[公式:查看文本],平均错误为[公式:查看文本].
  • 实现的平均定位时间为17.55 ms.

结论:

  • 提出的三点正常向量和基于投影的算法有效地确定空间物流包的物理几何中心的位置.
  • 这种方法为推进无序物流包裹分类技术的研究提供了宝贵的参考.