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Related Concept Videos

Phase Diagrams02:39

Phase Diagrams

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A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
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Phase Transitions02:31

Phase Transitions

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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Inductance: Single-Phase And Three-Phase Line01:28

Inductance: Single-Phase And Three-Phase Line

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Understanding the inductance of transmission lines is crucial for efficient design and operation in electrical power systems. This discussion delves into the inductance characteristics of single-phase two-wire and three-phase three-wire transmission lines with equal phase spacing.
Single-Phase Two-Wire Line:
A single-phase line consists of two solid cylindrical conductors, denoted as x and y. Each conductor carries phasor currents ix and iy, respectively. Given that the sum of these currents is...
626
Capacitance: Single-Phase And Three-Phase Line01:25

Capacitance: Single-Phase And Three-Phase Line

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In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
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Phase Changes01:19

Phase Changes

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Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
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Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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Related Experiment Video

Updated: Jan 30, 2026

Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning
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Simultaneous measurement and reconstruction tailoring for quantitative phase imaging.

Zhengyun Zhang, Wei-Na Li, Anand Asundi

    Optics Express
    |January 16, 2019
    PubMed
    Summary

    We introduce Simultaneous Measurement and Reconstruction Tailoring (SMaRT) for quantitative phase imaging. This joint optimization approach reduces phase reconstruction error by simultaneously designing measurement and reconstruction processes.

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    Area of Science:

    • Optics and Photonics
    • Computational Imaging
    • Image Reconstruction

    Background:

    • Quantitative phase imaging (QPI) is crucial for label-free cell imaging and material science.
    • Traditional QPI methods often optimize measurement and reconstruction separately, leading to suboptimal performance.
    • Inverse problems in science require robust design of both data acquisition and analysis.

    Purpose of the Study:

    • To develop a novel joint optimization framework for quantitative phase imaging.
    • To improve phase reconstruction accuracy by co-designing measurement and reconstruction.
    • To demonstrate the efficacy of the proposed method using simulated and experimental data.

    Main Methods:

    • Simultaneous Measurement and Reconstruction Tailoring (SMaRT) framework proposed.
    • Joint optimization minimizes expected end-to-end error for measurement and reconstruction parameters.
    • Validation performed using simulated and experimentally-collected quantitative phase imaging data.

    Main Results:

    • SMaRT significantly reduces phase reconstruction error compared to separate optimization techniques.
    • The joint optimization approach reveals novel and sometimes counterintuitive design principles.
    • Demonstrated improved performance in a specific quantitative phase imaging scenario.

    Conclusions:

    • Simultaneous optimization of measurement and reconstruction offers superior performance in QPI.
    • The SMaRT approach provides a powerful paradigm for tackling inverse problems.
    • This methodology has potential applications in various scientific fields requiring inverse problem solutions.