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相关概念视频

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

78
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...
78
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

65
When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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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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Local Attraction01:22

Local Attraction

89
Local attraction refers to disturbances in compass readings caused by magnetic influences from nearby objects such as metal fences, buried pipes, vehicles, buildings, power lines, or natural iron ore deposits. Small items like wristwatches, steel tools, or belt buckles can also interfere with the compass by creating local magnetic fields that distort the Earth's natural magnetic field. These distortions lead to inaccurate readings, posing navigation and land surveying challenges.Local...
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Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
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在多路径效应下的元启发式无设备定位算法.

Huajing Li1, Ning Li1, Yan Guo1

  • 1College of Communications Engineering, PLA Army Engineering University, Nanjing 210007, China.

Entropy (Basel, Switzerland)
|July 29, 2023
PubMed
概括
此摘要是机器生成的。

这项研究通过使用混合元启发算法优化压缩传感来解决无设备本地化挑战,以考虑多路径效应. 该方法可以提高本地化准确性和速度,同时节省资源.

关键词:
压缩感应理论压缩感应理论无设备定位多重效应多种效应的元启发式算法.

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科学领域:

  • 无线通信是一种无线通信.
  • 信号处理 信号处理
  • 优化算法优化算法

背景情况:

  • 无设备定位 (DFL) 的准确性因多路径效应而降低.
  • 现有的DFL技术往往忽视多路径,尽管它有潜在的本地化信息.
  • 多路径传播显著影响了基于压缩传感的定位.

研究的目的:

  • 在多路径效应下,优化传感矩阵以在无设备定位下进行压缩传感.
  • 开发一个强大的本地化方法,包括多个反射.
  • 为了提高无设备定位的准确性和效率.

主要方法:

  • 公式感知矩阵优化作为一个受约束的组合优化问题.
  • 为感知矩阵优化提出了一个混合的元启发式算法.
  • 利用智能反射表面和虚拟节点模型来构建通信链接.
  • 采用K-means集群用于测量矩阵属性改进和用于感知矩阵优化的元启发式算法.

主要成果:

  • 拟议的混合元启发算法有效优化传感矩阵.
  • 在无设备场景中实现快速,高精度的定位.
  • 证明了有效地保护通信资源.
  • 通过模拟验证了该方法的性能.

结论:

  • 开发的方法成功地解决了现有的无设备本地化技术的局限性.
  • 优化的传感矩阵在多路径效应的情况下显著提高了定位精度.
  • 混合元启发算法为资源受限的本地化问题提供了有效的解决方案.