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相关概念视频

Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

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Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Differential Leveling01:12

Differential Leveling

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Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...
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相关实验视频

Updated: Sep 11, 2025

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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单调相位编码与动态边界对齐,用于高速3D造型测量.

Yusheng Jin, Jianjun Ding, Zhenyi Wang

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    概括
    此摘要是机器生成的。

    本研究介绍了一种用于边缘投射造型测量 (FPP) 的新时相解封 (TPU) 方法. 它显著减少了准确的3D测量所需的模式,增强了动态测量能力.

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    Lens-free Video Microscopy for the Dynamic and Quantitative Analysis of Adherent Cell Culture
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    相关实验视频

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    科学领域:

    • 光学计量学 在光学计量学
    • 3D重建的3D重建
    • 计算成像技术的成像

    背景情况:

    • 边缘投影谱 (FPP) 对于3D形状测量至关重要.
    • 由于众多的模式,传统的方法难以处理动态的场景.
    • 时间阶段解封 (TPU) 旨在有效地解决阶段模两可的问题.

    研究的目的:

    • 为FPP开发一个强大而高效的TPU框架.
    • 为了减少动态测量的预测模式的数量.
    • 为了实现精确的绝对相位检索,使用更少的模式.

    主要方法:

    • 一个新的框架,结合了三个相位移模式和一个编码模式.
    • 单调编码策略用于重组相位序列并扩大编码范围.
    • 梯度受约束的本地搜索 (GCLS) 用于代码词边缘的动态对齐.

    主要成果:

    • 通过减少模式集实现了准确的绝对相位检索.
    • 与传统方法相比,预测模式减少了66%.
    • 在实验测量中保持了亚毫米准确度.

    结论:

    • 拟议的TPU框架提高了FPP的效率和稳定性.
    • 这种方法使得高速的动态3D测量具有高精度.
    • 显著减少模式为现实世界的应用提供了实际优势.