Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

395
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...
395
Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

320
In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
320
Torque Free Motion01:15

Torque Free Motion

470
The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
470
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

456
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...
456
Rotation with Constant Angular Acceleration - I01:37

Rotation with Constant Angular Acceleration - I

6.7K
If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
6.7K
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

329
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...
329

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Hydrogen-bond-mediated directional adsorption and acid-base synergy promote the transfer hydrogenation of levulinic acid to γ-valerolactone.

Bioresource technology·2026
Same author

Body composition, anxiety, and fitness test performance in Chinese college students: biopsychosocial association patterns across gender-differentiated testing contexts.

BMC psychology·2026
Same author

Association Between Uric Acid-to-HDL Cholesterol Ratio and Sarcopenia: Sex-Specific Patterns From NHANES 2011-2018.

International journal of endocrinology·2026
Same author

ROS-responsive hydrogel for treating pulpitis: Localized immunometabolic regulation by dimethyl itaconate promotes reparative dentin formation.

Colloids and surfaces. B, Biointerfaces·2026
Same author

Aptamer-Directed Porous DNA Nanocomposite Hydrogel for Active Pulp Preservation: Immunomodulation, Stem Cell Recruitment and Reparative Dentinogenesis.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Cryptococcal pneumonia susceptibility in immunocompetent patients: Role of pseudomonas aeruginosa via IL-2/IL-12/IL-17 pathways.

Journal of infection and public health·2026
Same journal

Semi-supervised YOLO-DEP for high-resolution X-ray component localization and counting.

Journal of X-ray science and technology·2026
Same journal

Attention based multi-scale edge-aware segmentation and convolutional transformer framework for automated glaucoma detection from fundus images.

Journal of X-ray science and technology·2026
Same journal

Improving the robustness of radiomic features to patient size variations in CBCT imaging for radiotherapy.

Journal of X-ray science and technology·2026
Same journal

DH-OOD: A decoupled hybrid framework for robust skin lesion classification via semantic-structural fusion.

Journal of X-ray science and technology·2026
Same journal

Development and evaluation of deep learning models for automatic coronary stenosis segmentation in X-ray angiography.

Journal of X-ray science and technology·2026
Same journal

Projection-domain reconstruction of patient-specific panoramic images from CBCT projection data.

Journal of X-ray science and technology·2026
查看所有相关文章

相关实验视频

Updated: Jun 21, 2025

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
06:09

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

3.1K

在机器人CT中异步旋转的无参考校准方法.

Xuan Zhou1,2, Yuedong Liu1,2, Cunfeng Wei1,2,3

  • 1Beijing Engineering Research Center of Radiographic Techniques and Equipment, Institute of High Energy Physics, Chinese Academy of Science, Beijing, China.

Journal of X-ray science and technology
|July 12, 2024
PubMed
概括
此摘要是机器生成的。

几何校准对于经历异步运动的机器人CT系统至关重要. 一种新的无参考方法通过纠正异步旋转来提高图像质量,提高图像保真度.

关键词:
机器人CT CT CT 机器人CT CT几何学校准的校准方法没有参考的无参考.

更多相关视频

Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

17.6K
Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery
05:12

Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery

Published on: August 12, 2021

2.0K

相关实验视频

Last Updated: Jun 21, 2025

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
06:09

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

3.1K
Method to Measure Tone of Axial and Proximal Muscle
10:41

Method to Measure Tone of Axial and Proximal Muscle

Published on: December 14, 2011

17.6K
Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery
05:12

Robotized Testing of Camera Positions to Determine Ideal Configuration for Stereo 3D Visualization of Open-Heart Surgery

Published on: August 12, 2021

2.0K

科学领域:

  • 医疗成像医学成像
  • 机器人技术 机器人技术 机器人技术
  • 图像重建 图像的重建

背景情况:

  • 机器人CT系统需要精确的几何校准才能获得最佳的图像质量.
  • 机器人操纵器之间的异步引入了文物并降低了图像保真度.

研究的目的:

  • 评估不同类型异步对机器人CT图像的影响.
  • 为异步机器人CT系统提出和验证一种新的,无参考的校准方法.

主要方法:

  • 一个简化的几何模型用于校准.
  • 该方法利用网格采样和重新投影差异来指导优化.
  • 进行图像和几何学的代,交替优化.

主要成果:

  • 拟议的校准方法显著减少了图像工件.
  • 峰值信号噪声比 (PSNR) 提高了2%,结构相似度指数 (SSIM) 提高了13.6%,在校准后.
  • 在模拟实验中观察到更好的图像质量和真实性.

结论:

  • 异步旋转在机器人CT重建中构成了重大挑战.
  • 开发的无参考校准方法有效地纠正异步旋转,提供了可行的解决方案.