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相关概念视频

Azimuths and Bearings01:19

Azimuths and Bearings

237
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
237
Adjusting a Traverse01:12

Adjusting a Traverse

110
In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
110
Errors in Global Positioning System01:26

Errors in Global Positioning System

117
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,...
117
Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

133
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...
133
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

125
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...
125
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

96
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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Updated: Sep 18, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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一个基于信息几何学的跟踪前检测算法,用于雷达系统中的距离距离测量.

Jinguo Liu1, Hao Wu1, Zheng Yang1

  • 1College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China.

Entropy (Basel, Switzerland)
|June 26, 2025
PubMed
概括
此摘要是机器生成的。

本研究引入了一种使用雷达系统信息几何学 (IG) 的新型轨道前检测 (TBD) 方法. 该方法通过整合多数据来增强杂乱中的弱移动目标检测,改善信号与杂乱比率 (SCR).

关键词:
库尔巴克莱布勒的分歧.动态编程是动态的编程.信息几何学信息几何学多检测检测多检测测量范围-阿齐木斯测量结果在检测之前跟踪检测.

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相关实验视频

Last Updated: Sep 18, 2025

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科学领域:

  • 雷达系统工程 雷达系统工程
  • 信号处理 信号处理
  • 信息几何学信息几何学

背景情况:

  • 在复杂的杂乱中检测弱移动目标是雷达的一个持续挑战.
  • 现有的轨道前检测 (TBD) 方法在异质的杂乱背景下扎.
  • 信息几何学 (IG) 为强大的杂乱中检测提供了一个强大的框架.

研究的目的:

  • 开发一种先进的TBD方法,利用信息几何学来改进目标检测.
  • 通过在连续的雷达扫描中整合信息来增强多检测能力.
  • 为了应对在具有挑战性的海洋杂乱环境中弱移动目标识别的挑战.

主要方法:

  • 模拟目标和杂乱轨迹在赫米蒂安正确定性 (HPD) 和功率频谱 (PS) 道上.
  • 使用Kullback-Leibler (KL) 分歧作为基于IG的评分函数中的几何度量.
  • 实施具有状态过渡约束的动态编程 (DP) 框架,以最大限度地实现轨迹识别的集成优点函数.

主要成果:

  • 提出的基于IG的TBD方法有效地整合了跨多个框架的信息.
  • 对海上杂乱数据集的实验验证表明,信号与杂乱比率 (SCR) 的改善至少为3dB.
  • 该算法通过最大化设计的综合优点函数来成功识别目标轨迹.

结论:

  • 基于IG的新型TBD方法显著提高了在异质杂乱中检测弱移动目标的性能.
  • 在TBD框架内的跨框架信息集成可以在具有挑战性的雷达场景中提高性能.
  • 该方法比传统的雷达检测技术提供了显著的性能提升.