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相关概念视频

Maximum Power Transfer01:16

Maximum Power Transfer

255
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
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Line Protection with Impedance Relays01:27

Line Protection with Impedance Relays

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Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
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Interference: Path Lengths01:10

Interference: Path Lengths

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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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The Maximum Power Transfer Theorem01:20

The Maximum Power Transfer Theorem

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Consider a linear AC Thevenin equivalent circuit connected to a load impedance.
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Propagation of Action Potentials01:23

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The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
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The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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相关实验视频

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在AF继电器辅助的PLC系统中,具有多个eavessdroppers的干扰预编码.

Zhengmin Kong1, Jiaxing Cui1, Li Ding2

  • 1School of Electrical Engineering and Automation, Wuhan University, Wuhan, 430072, China.

Scientific reports
|April 9, 2024
PubMed
概括
此摘要是机器生成的。

这项研究通过使用物理层安全 (PLS) 和一种新的干扰方案来提高电力线通信 (PLC) 的信息安全性. 拟议的方法有效地最大限度地提高了对MIMO通道窃听者的保密率.

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科学领域:

  • 信息安全 信息安全
  • 电信工程 电信工程 电信工程
  • 信号处理 信号处理

背景情况:

  • 在数字时代,信息安全至关重要.
  • 电力线通信 (PLC) 系统面临安全挑战.
  • 物理层安全 (PLS) 提供了一个有前途的解决方案.

研究的目的:

  • 在中继辅助的MIMO-PLC系统中调查物理层安全性 (PLS).
  • 针对针对多个勾结和非勾结窃听者的安全信号传输.
  • 为了最大限度地提高通信系统的保密率.

主要方法:

  • 一个采用全双重 (FD) 放大和向前 (AF) 继电器的双相干扰方案.
  • 在源和继电器上优化干扰和传输预编码矩阵.
  • 区块坐标下降 (BCD) 算法的应用,以有效解决问题.

主要成果:

  • 拟议的区块坐标下降 (BCD) 算法有效地解决了优化问题.
  • 模拟结果验证了算法的融合和性能.
  • 与非干扰方法相比,干扰方案显著提高了保密率.

结论:

  • 拟议的方法保证了在现实的MIMO-PLC通道模型中安全的通信.
  • 双相干扰方案对勾结和非勾结的窃听者都有效.
  • 这项研究有助于提高PLC系统的信息安全性.