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相关概念视频

Fast Decoupled and DC Powerflow01:24

Fast Decoupled and DC Powerflow

233
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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Extraction: Partition and Distribution Coefficients01:14

Extraction: Partition and Distribution Coefficients

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The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
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¹H NMR Signal Multiplicity: Splitting Patterns01:13

¹H NMR Signal Multiplicity: Splitting Patterns

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When protons A and X are coupled, their nuclear spin energy levels are slightly modified. This is because the energy required to excite proton A to a spin state parallel to proton X is slightly different from the energy required for it to become anti-parallel to spin X. Consequently, there are two possible excitation frequencies for A (A1 and A2), depending on the spin state of X, and vice versa. The mutual nature of coupling implies that the difference between frequencies A1 and A2, indicated...
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Multimachine Stability01:25

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Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
188
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

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In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1  triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
1.4K
The Power Flow Problem and Solution01:26

The Power Flow Problem and Solution

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Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk​, phase angle δk​, real power Pk​, and reactive power Qk​. Two of these four variables are inputs, while the...
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基于多维直接二进制搜索算法的不同模式功率分割器.

Hansi Ma, Xin He, Gangyi Zhu

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    |September 15, 2023
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    概括
    此摘要是机器生成的。

    使用多维搜索算法开发了一种新的波导连接电源分割器 (WPS). 这种创新的设备有效地将光学信号分解为基本的横向电 (TE0) 和TE1模式,并提供平衡的输出.

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    科学领域:

    • 光学和光学工程的光学和光学工程.
    • 集成光学 集成光学
    • 波导器件的波导器件是指导波的.

    背景情况:

    • 有效的光信号分裂对于各种光子应用至关重要.
    • 现有的功率分割器通常在模式控制和制造复杂性方面面临限制.
    • 开发能够处理多个光学模式的设备是一个持续的挑战.

    研究的目的:

    • 设计,制造和描述一种新的不同模式 (波导连接) 功率分割器 ((WPS).
    • 为了实现基本横向电 (TE0) 和TE1模式的同时生成,输出平衡为1:1.
    • 为了优化设备性能,制造稳定性,并减少设计时间.

    主要方法:

    • 开发一种新的多维直接二进制搜索算法.
    • 在状态,旋转,形状和尺寸维度中进行系统搜索,以优化参数.
    • 使用标准光子制造技术设计的 (W) PS的制造和表征.

    主要成果:

    • (W)PS成功地生成TE0和TE1模式,输出平衡为1:1.
    • 与传统的功率分离器 (PS) 相比,显著缩短了附带式缩丝的长度.
    • 测量插入损失<0.9dB和交叉声<-17.8dB在1540-1560nm.
    • 证明了扩展到多个输出端口的潜力,配有可调节的龙头合器.

    结论:

    • 新的多维搜索算法使复杂的光子设备,如 (W) P. S. 的高效设计成为可能.
    • 开发的 (W)PS在模式分割和减少足迹方面提供了卓越的性能.
    • 设备架构可以适应先进的多端口和多模式光学信号路由.