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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

374
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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Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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...
330
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

296
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...
296
Local Attraction01:22

Local Attraction

333
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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从自动识别系统数据中无监督的港口位定位.

Andreas Hadjipieris1, Neofytos Dimitriou1, Ognjen Arandjelović2

  • 1Cyprus Marine and Maritime Institute, Vasileos Pavlou Square 13, Larnaca 6023, Cyprus.

Sensors (Basel, Switzerland)
|November 27, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了一种使用自动识别系统 (AIS) 数据准确识别港口泊位的新方法. 该方法通过克服现有泊数据的局限性,提高港口运营和供应链效率.

关键词:
这就是AISIS.超参数调整 超参数调整机器学习是机器学习.海事海事海事 海事海事描述的最小长度.运输 运输 运输 运输 是一个空间聚类是空间聚类.

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科学领域:

  • 海上物流的海上物流
  • 地理空间数据科学数据科学
  • 供应链管理 供应链管理

背景情况:

  • 港口运营依赖于准确的泊位数据以提高效率.
  • 现有的泊位数据库往往不完整或不准确.
  • 自动识别系统 (AIS) 数据为实时监控提供了一个潜在的解决方案.

研究的目的:

  • 开发一种无监督的方法来准确地定位港口泊位.
  • 提高港口资源的利用率和优化供应链.
  • 解决不完整和不准确的公开可用的港口泊位数据的局限性.

主要方法:

  • 使用AIS数据集群进行无监督的空间建模.
  • 超参数优化,以实现强大的泊位位置定位.
  • 通过使用一个月的AIS数据,对各种港口环境进行培训和评估.

主要成果:

  • 拟议的方法在泊位定位方面显著优于现有的技术.
  • 实现了0.85的Bhattacharyya平均距离,而最好的现有方法是13.56.
  • 定性分析证实了更精确的泊位边界和更好的空间分辨率.

结论:

  • 数据驱动的方法为港口泊位本地化提供了卓越的解决方案.
  • 提高泊位数据的准确性可以带来优化港口运营和供应链.
  • 该方法为分析和改进海上物流提供了一个强大的工具.