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相关概念视频

Power in a Three-Phase Circuit01:15

Power in a Three-Phase Circuit

631
Three-phase systems have two configurations: the wye and delta. A star configuration can be three or four wires; in a delta configuration, the components are connected in a closed loop. Instantaneous power refers to the power value at a precise moment, and in a balanced three-phase system, it is constant. This is because the sum of the instantaneous powers in the three phases remains steady over time, despite individual fluctuations, due to the symmetry and phase relationship. The total...
631
Power Distribution in Three-phase and Single Phase Circuits01:17

Power Distribution in Three-phase and Single Phase Circuits

656
Power distribution within electrical circuits is a foundational aspect of residential and industrial energy systems. While single-phase power is common in residential settings, three-phase power is the standard for industrial environments with heavy machinery. Each system is different and has advantages, and it's crucial to understand the underlying principles of power distribution and material efficiency.
Single-Phase Power Distribution:
Single-phase circuits are typical in household settings;...
656
Power System Three-Phase Short Circuits01:21

Power System Three-Phase Short Circuits

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Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
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lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

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Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems01:19

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Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
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相关实验视频

Updated: Feb 10, 2026

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
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适用于低功耗系统的XOR逻辑相位编码可编程元表面.

Ruichao Zhu1, Sai Sui1, Junyan Dai2

  • 1Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices, Air Force Engineering University, Xi'an, Shaanxi, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 8, 2026
PubMed
概括
此摘要是机器生成的。

这项研究引入了XOR逻辑相位编码可编程元表面,简化了偏向网络从m×n到m+n. 这项创新大大降低了动态电磁波操纵的功耗.

关键词:
在XOR逻辑上,XOR就是逻辑.低功耗,低功耗的电力使用.阶段编码阶段编码.可编程的地表变量.无线通信是无线通信的重要组成部分.

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科学领域:

  • 超材料和纳米光子学
  • 电磁波操纵是一种电磁波操纵.
  • 智能系统是一个智能系统.

背景情况:

  • 可编程的超表面是动态电磁波控制的关键.
  • 传统的超表面需要复杂的偏移网络 (m×n),导致高功耗.
  • 对元原子的独立控制对于实时可重编程的功能至关重要.

研究的目的:

  • 提出一种新的XOR逻辑相位编码可编程元地表.
  • 为了减少偏差网络和电力消耗的复杂性.
  • 为了展示可重编程的功能,如光束扫描和多光束散射.

主要方法:

  • 使用了Pancharatnam-Berry元原子,装有两个PIN二极管用于XOR逻辑相位编码.
  • 实施了对m+n个偏差线的行列控制方案.
  • 设计,制造和测试了一种原型的超表面.

主要成果:

  • 从m×n到m+n实现了偏差网络复杂性的降低.
  • 显著减少了电力消耗.
  • 通过模拟和测量验证了可重编程光束扫描和多光束散射功能.

结论:

  • 拟议的XOR-逻辑超表面提供了一个简化的架构和低功耗.
  • 这种技术适用于下一代无线通信,物联网和雷达等智能系统.
  • 介绍了可编程超表面的新范式,具有实用优势.