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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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The Antenna Complex01:42

The Antenna Complex

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Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...
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Centroid for the Paraboloid of Revolution01:16

Centroid for the Paraboloid of Revolution

501
The paraboloid of revolution is an axially symmetric surface generated by rotating a parabola around its axis. This shape has several applications in mechanical engineering due to its advantageous structural properties, such as strength against stress concentration points and rotational symmetry.
The centroid for the paraboloid of revolution is the point where all the mass of the paraboloid is concentrated. This centroid is important for engineering applications, as it determines how forces are...
501
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

16
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

440
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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相关实验视频

Updated: May 17, 2025

Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

Published on: September 26, 2014

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探索CP阵列天线特性及其应用于可部署结构的应用.

Tae-Hak Lee1, Kyoung-Joo Lee2, WonSeob Lim3

  • 1Department of Electrical and Electronic Engineering, Yuhan University, 590, Gyeongin-ro, Bucheon-si 14780, Republic of Korea.

Sensors (Basel, Switzerland)
|May 14, 2025
PubMed
概括
此摘要是机器生成的。

这项研究评估了用于无线电力传输 (WPT) 的循环极化 (CP) 阵列天线. 结果显示,CP天线在卫星和地面WPT系统的各种安装配置中表现良好.

关键词:
这是C频段的C频段.立方体卫星 立方体卫星阵列天线 阵列天线循环的极化是循环的极化.可以部署的天线天线.无线输电无线输电无线输电无线输电

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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
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相关实验视频

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科学领域:

  • 电磁学和天线理论
  • 无线通信系统无线通信系统

背景情况:

  • 无线电力传输 (WPT) 系统需要高效的发射天线.
  • 循环极化 (CP) 天线在WPT中由于极化多样性而具有优势.

研究的目的:

  • 为了研究CP阵列天线在WPT应用中的性能.
  • 评估CP发射天线的不同安装配置,用于WPT.

主要方法:

  • 多个5.8 GHz CP阵列天线的制造和测试.
  • 在三个不同的安装配置中评估天线性能.
  • 分析关键参数:回报损失,收益,轴向比和辐射模式.

主要成果:

  • 所有三个测试的安装配置都显示了与理论预测一致的性能.
  • 该CP阵列天线显示适合WPT应用.

结论:

  • 拟议的CP阵列天线设计对WPT系统有效.
  • 在不同的安装场景中,天线的性能是稳健的,支持其在太空或地面WPT中的使用.