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相关概念视频

Deflection of a Beam01:19

Deflection of a Beam

374
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
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Plotting and Calibrating the Root Locus01:19

Plotting and Calibrating the Root Locus

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Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
182
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

119
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Focusing of Light in the Eye01:16

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher
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在黑盒镜头系统中的点差函数建模和工程.

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    本研究引入了一种新方法,用于在未知成像系统 (如商业镜头) 中建模和设计点扩散函数 (PSF). 这使得精确的波造型能够改善计算成像和3D定位.

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    科学领域:

    • 计算成像技术的成像
    • 光学工程是指光学工程.
    • 波浪光学是一种波浪光学.

    背景情况:

    • 点差函数 (PSF) 工程对于在成像系统中编码对象信息至关重要.
    • 现有的方法依赖于已知的成像模型,限制了像商业镜头这样的"黑子"系统的应用.

    研究的目的:

    • 为任意镜头系统开发一个一般的成像模型.
    • 创建一个管道,用于自动确定这个模型的参数.
    • 为了使PSF工程在系统未知属性.

    主要方法:

    • 对一般镜头系统的波光学分析.
    • 使用缩放的富里埃变换,推导出一个通用成像模型.
    • 开发一个自动参数确定管道.

    主要成果:

    • 当应用于摄影镜头时,可以实现高PSF建模精度.
    • 在光学系统中"看到你设计的东西"的表现能力.
    • 成功实施PSF工程,以实现最佳的3D本地化.

    结论:

    • 开发的管道允许在任意成像系统中准确的波面造型设计.
    • 这项工作显著提高了计算成像能力.
    • 为精确的3D定位等应用程序提供先进的光学设计.