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相关概念视频

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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Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

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A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
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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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Residuals and Least-Squares Property01:11

Residuals and Least-Squares Property

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The vertical distance between the actual value of y and the estimated value of y. In other words, it measures the vertical distance between the actual data point and the predicted point on the line
If the observed data point lies above the line, the residual is positive, and the line underestimates the actual data value for y. If the observed data point lies below the line, the residual is negative, and the line overestimates the actual data value for y.
The process of fitting the best-fit...
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Uncertainty in Measurement: Accuracy and Precision03:37

Uncertainty in Measurement: Accuracy and Precision

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

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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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Updated: Sep 8, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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基于剩余权重的UWB电子定位错误抑制方法.

Lin Yang1, Bolong Chen2, Zhiwei Cao3

  • 1Wuhan Electric Power Technical College, Hubei, 430079, China.

Scientific reports
|July 9, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了一种新的超宽带 (UWB) 定位算法,以提高电力设施中的工人安全. 该算法有效地抑制非视线 (NLOS) 错误,提高实时定位精度.

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Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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科学领域:

  • 电气工程 电气工程
  • 地理学工程 工程地质学
  • 安全工程安全工程

背景情况:

  • 电力设施的手动检查存在安全风险.
  • 超宽带 (UWB) 定位提供实时工人位置,但在复杂的环境中遭受非视线 (NLOS) 错误.

研究的目的:

  • 开发和验证一种UWB定位算法,可以消除NLOS错误,从而提高电力设施的准确性.
  • 通过可靠的实时位置跟踪来提高工人安全.

主要方法:

  • 一个新的UWB定位算法,利用接收信号强度指示 (RSSI) 来识别和减轻NLOS错误.
  • 实施一种剩余功率权重方法,具有高阶权重函数,以消除错误.
  • 使用最小平方或基于可用节点数量的开发算法进行条件定位计算.

主要成果:

  • 拟议的算法通过分析信号强度值,有效地识别NLOS环境.
  • 显著抑制NLOS错误,导致更准确的定位.
  • 剩余功率权衡方法在减少定位不准确性方面被证明是有效的.

结论:

  • 开发的UWB定位算法通过有效地抑制NLOS错误,提高了复杂环境中的准确性.
  • 这项技术可以通过可靠的实时跟踪来提高电力设施中的工人安全.
  • 该算法对现实世界应用程序具有前景,这些应用程序在具有挑战性的环境中需要精确的位置数据.