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相关概念视频

Masonry in Cold and Hot Weather Conditions01:21

Masonry in Cold and Hot Weather Conditions

137
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
137
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...
95
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

172
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...
172
Errors in Global Positioning System01:26

Errors in Global Positioning System

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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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Precipitation Processes01:12

Precipitation Processes

608
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
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相关实验视频

Updated: Sep 18, 2025

Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization
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在动态天气条件下安装无人机基站的节能部署模拟器.

Gyeonghyeon Min1, Jaewoo So1

  • 1Department of Electronic Engineering, Sogang University, Seoul 04107, Republic of Korea.

Sensors (Basel, Switzerland)
|June 27, 2025
PubMed
概括

本研究介绍了使用混合优化算法对无人驾驶飞行器 (UAV) 安装基站 (MBS) 进行节能部署策略. 该方法通过优化无人机位置和功率,考虑天气和地形以提高服务质量来提高网络性能.

科学领域:

  • 无线通信无线通信
  • 网络工程 网络工程
  • 优化算法 优化算法

背景情况:

  • 在无人机 (UAV) 装载基站 (MBS) 网络中的用户设备 (UE) 由于无人机的移动性和天气而面临动态频道变化.
  • 服务质量 (QoS) 的退化需要优化部署UAV-MBS,考虑到3D位置,传输功率和环境因素.

研究的目的:

  • 为多个无人机-MBS网络提出一个节能无人机-MBS部署方案.
  • 优化每个无人机-MBS的三维 (3D) 位置和传输功率.
  • 开发一个实用的部署模拟器,结合地理和气象数据.

主要方法:

  • 采用混合改进的模拟化粒子群优化 (ISA-PSO) 算法来确定UAV-MBS的3D位置和传输功率.
  • 开发了一个模拟器来模拟UAV-MBS部署,集成动态天气条件,地形数据和地理位置.
  • 与传统的部署方法相比,评估了性能.

主要成果:

  • 拟议的基于ISA-PSO的部署方案显示了与传统方法相比更快的趋同.
  • 该方案在优化无人机-MBS参数方面实现了更高的稳定性.
  • 开发的模拟器通过考虑实时天气和地形,提供了更实用的部署结果.
关键词:
无人机-MBS的部署部署能源效率是指能效的能源效率.地理位置感知模拟器的模拟器这是一个混合ISA-PSO.减弱天气的影响.

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结论:

  • 拟议的节能部署方案为无人机-MBS网络提供了卓越的性能.
  • 混合ISA-PSO算法有效优化UAV-MBS 3D定位和传输功率.
  • 天气感知模拟器提高了无人机-MBS部署策略的实用性和可靠性.