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相关概念视频

Motion of a Projectile01:23

Motion of a Projectile

744
Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
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Variation01:19

Variation

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An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
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Projectile Motion: Equations01:26

Projectile Motion: Equations

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Projectile motion is commonly observed in our day-to-day life. For example, a basketball thrown by a player, an arrow shot from a bow, and kids jumping into the pool, all undergo projectile motion.
Any projectile motion problem can be solved by using the following strategy:
10.2K
Kinematic Equations: Problem Solving01:15

Kinematic Equations: Problem Solving

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When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
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相关实验视频

Updated: Jun 14, 2025

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
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从视觉运动控制数据预测篮球投篮结果,使用可解释的机器学习.

Nikki Aitcheson-Huehn1, Ryan MacPherson2, Derek Panchuk3

  • 1Human Movement Science Curriculum, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Journal of sport & exercise psychology
|September 7, 2024
PubMed
概括
此摘要是机器生成的。

安静的眼睛 (QE),在行动之前的视觉固定期,可以预测篮球表现. 训练以延长QE持续时间可能会提高射击精度.

关键词:
篮球 射击 射击 篮球决策树 决策树 是一个决定树.眼睛跟踪 眼睛跟踪眼睛看着眼睛看着眼睛沉默的眼睛 沉默的眼睛技能发展 技能发展

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Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
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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
  • 发动机控制器的控制器
  • 人类表现的人类表现.

背景情况:

  • 安静的眼睛 (QE) 是在关键行动之前对目标的视觉固定,与提高性能有关.
  • 虽然QE是可训练的,但其对绩效结果的直接预测能力仍在调查中.
  • 了解QE的预测能力对于开发有效的体育训练干预措施至关重要.

研究的目的:

  • 使用视觉运动控制变量预测篮球投篮结果 (击中或错过).
  • 调查不同QE参数和其他与射击相关的变量的预测准确度.
  • 为了确定QE是否可以作为篮球中直接的绩效预测指标.

主要方法:

  • 采用决策树分类方法来预测拍摄结果.
  • 12名篮球运动员在球场的不同位置进行了200次投篮,同时戴着移动眼镜.
  • 使用决策树和随机森林建模了八个预测因素,包括射击位置,手臂延伸时间和QE指标 (开始,偏移,持续时间).

主要成果:

  • 决策树模型准确预测了超过66%的成功拍摄和超过50%的错过拍摄.
  • 相对安静的眼睛持续时间成为射击成功的主要预测因素.
  • 成功注射与相对QE持续时间超过18.4%有关.

结论:

  • 安静的眼睛持续时间是篮球投篮成功的重要预测因素.
  • 旨在延长QE持续时间超过18%的培训干预措施可以提高射击性能.
  • 这些发现支持使用QE作为提高运动表现的可测量目标.