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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

36
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,...
36
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

49
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
49
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

34
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...
34
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

22
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...
22
Distance Measurements by Taping01:18

Distance Measurements by Taping

27
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
27
Improving Translational Accuracy02:07

Improving Translational Accuracy

9.1K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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相关实验视频

Updated: Jun 6, 2025

Visualization Method for Proprioceptive Drift on a 2D Plane Using Support Vector Machine
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一个精确和可扩展的室内定位系统,使用跨模式的知识蒸.

Hamada Rizk1,2, Ahmed Elmogy3,4, Mohamed Rihan5

  • 1Computers & Control Engineering Department, Tanta University, Tanta 31527, Egypt.

Sensors (Basel, Switzerland)
|November 27, 2024
PubMed
概括

DistilLoc通过将知识从往返时间 (RTT) 传输到收到信号强度指标 (RSSI) 模型来增强室内定位. 这实现了次米准确度,改进了智能环境的现有方法.

关键词:
深度学习是一种深度学习.使用指纹进行指纹采集.室内局部化 室内局部化知识的蒸知识的蒸.往返时间 时间 往返时间

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Movement Retraining using Real-time Feedback of Performance
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Movement Retraining using Real-time Feedback of Performance

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科学领域:

  • 室内定位和定位系统的定位和定位系统.
  • 机器学习用于信号处理.
  • 人与计算机的交互和无处不在的计算.

背景情况:

  • 准确的用户本地化对于以人为中心的应用程序和可持续发展目标 (SDGs) 至关重要.
  • 由于信号限制,GPS在室内无效,而接收信号强度指示器 (RSSI) 方法遭受环境干扰.
  • 往返时间 (RTT) 提供了更好的准确性,但缺乏通用接入点支持.

研究的目的:

  • 推出DistilLoc,一个新的跨知识蒸框架,用于准确和强大的室内定位.
  • 增强基于接收信号强度指标 (RSSI) 的本地化,使用来自往返时间 (RTT) 模型的知识.
  • 开发用于室内定位的可扩展和计算高效的解决方案.

主要方法:

  • 实现了一个老师-学生架构,其中一个RTT模型 (老师) 训练一个RSSI模型 (学生).
  • 利用 FNet 架构来有效处理多个接入点 RSSI 信号.
  • 在使用Android设备和谷歌WiFi接入点的各种室内环境中评估DistilLoc.

主要成果:

  • 在不同的环境中,在0.42m和0.32m的中位误差下,实现了次米定位精度.
  • 显著改善:比传统的RSSI提高267%,比多边化提高496%.
  • 验证了DistilLoc的可扩展性和准确性,在部署过程中不需要RTT数据.

结论:

  • DistilLoc通过有效地将RTT模型知识转移到RSI模型,提供了一个可扩展和准确的室内本地化解决方案.
  • 该框架克服了传统RSSI和RTT方法的局限性,使室内定位更可靠.
  • 这项技术支持智能,资源高效的城市环境,为SDG 9和SDG 11做出贡献.