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Related Concept Videos

Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

833
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...
833
Relative Motion Analysis using Rotating Axes - Acceleration01:22

Relative Motion Analysis using Rotating Axes - Acceleration

713
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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Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

492
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...
492
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

766
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...
766
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

656
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...
656
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

663
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...
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Magnetic Resonance Derived Myocardial Strain Assessment Using Feature Tracking
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Gradual ghost imaging of moving objects by tracking based on cross correlation.

Shuai Sun, Jun-Hao Gu, Hui-Zu Lin

    Optics Letters
    |November 16, 2019
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    Summary
    This summary is machine-generated.

    This study introduces a novel ghost imaging technique for moving objects. It reconstructs clear images from sequential, low-quality images, improving performance for dynamic targets.

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    Area of Science:

    • Optics and Photonics
    • Computational Imaging
    • Image Reconstruction

    Background:

    • Ghost imaging typically requires numerous samples, limiting its effectiveness for dynamic scenes.
    • Conventional methods for imaging moving objects often involve independent tracking and imaging, necessitating sequential clear images.

    Purpose of the Study:

    • To overcome the sampling limitations of ghost imaging for moving objects.
    • To develop a method for reconstructing high-quality images of moving objects without requiring independent tracking.

    Main Methods:

    • Proposing a novel ghost imaging approach utilizing cross-correlation analysis of sequential, low-quality images.
    • Calculating object displacement from the correlation of successive low-resolution images.
    • Gradually reconstructing a high-quality image of the moving object throughout its trajectory.

    Main Results:

    • Successfully reconstructed high-quality images of moving objects.
    • Demonstrated effectiveness for both translating and rotating objects.
    • Reduced the need for extensive sampling compared to conventional methods.

    Conclusions:

    • The proposed cross-correlation method enhances ghost imaging performance for dynamic targets.
    • This technique offers a viable solution for imaging moving objects with improved efficiency.
    • The approach is robust for various object movements, including translation and rotation.