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相关概念视频

Types Of Transformers01:16

Types Of Transformers

949
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
949
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

2.7K
The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in...
2.7K
Transformers with Off-Nominal Turns Ratios01:25

Transformers with Off-Nominal Turns Ratios

140
In scenarios involving parallel transformers with disparate ratings, developing per-unit models requires accommodating off-nominal turns ratios. This situation arises when the selected base voltages are not proportional to the transformer’s voltage ratings. Consider a transformer where the rated voltages are related by the term a. If the chosen voltage bases satisfy a relationship involving term b, term c is defined as the ratio of these bases. This ratio is then substituted into the...
140
Transformers in Distribution System01:27

Transformers in Distribution System

98
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
98
Source Transformation for AC Circuits01:11

Source Transformation for AC Circuits

535
The process of source transformation in the frequency domain entails the conversion of a voltage source, positioned in series with an impedance, into a current source that is parallel to an impedance, or the other way around. It is essential to maintain the following relationships while transitioning from one source type to another.
535
The Ideal Transformer01:26

The Ideal Transformer

356
In single-phase two-winding transformers, two windings are coiled around a magnetic core characterized by cross-sectional area A and magnetic permeability μ. A phasor current i1 enters the left winding while i2 exits the right winding, establishing the fundamental working of the transformer through electromagnetic principles.
Ampere's Law forms the basis of understanding the magnetic field within the transformer. It states that the integral of the magnetic field intensity's...
356

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相关实验视频

Updated: Jun 8, 2025

Generation of Human Chimeric Antigen Receptor Regulatory T Cells
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Generation of Human Chimeric Antigen Receptor Regulatory T Cells

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转移学习启用了基于变压器的生成对抗网络,用于建模和生成太赫兹频道.

Zhengdong Hu1, Yuanbo Li1, Chong Han2

  • 1Terahertz Wireless Communications (TWC) Laboratory, Shanghai Jiao Tong University, 200240, Shanghai, China.

Communications engineering
|November 3, 2024
PubMed
概括

这项研究引入了用于太赫兹频道建模的新人工智能方法,减少了对广泛测量的需求. 转移学习支持的网络准确地模拟了使用较少数据的太赫兹通信.

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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科学领域:

  • 无线通信无线通信
  • 信号处理 信号处理
  • 人工智能的人工智能

背景情况:

  • 太赫兹 (THz) 通信是未来无线系统的关键,提供每秒 (Tbps) 千兆比特的数据速率.
  • 准确的频道建模对于实现THz频谱潜力至关重要,但目前的方法需要广泛,昂贵的测量.

研究的目的:

  • 开发一种高效准确的太赫兹频道建模技术.
  • 为了减少依赖耗时和昂贵的物理测量在THz频道表征.

主要方法:

  • 使用生成对抗网络 (GAN) 来生成通道参数.
  • 为提高准确性,将一个具有自我注意机制的变压器结构集成到GAN中.
  • 转移学习被应用来解决模型和现实世界测量之间的差异.

主要成果:

  • 拟议的模型在太赫兹频道建模中实现了高精度.
  • 该方法显著减少了所需的测量数据的数量.
  • 这种方法证明了对传统的测量密集型技术的有希望的替代方案.

结论:

  • 基于转移学习的基于变压器的GAN为太赫兹频道建模提供了高效的解决方案.
  • 这种人工智能驱动的方法通过将测量需求降到最低来补充现有方法.
  • 该技术为加速开发和部署6G和超越无线系统铺平了道路.