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相关概念视频

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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相关实验视频

Updated: May 4, 2026

Data Acquisition Protocol for Determining Embedded Sensitivity Functions
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工程安全导向的爆炸诱导地震波信号处理:基于多尺度特征的EMD终点抑制方法.

Miao Sun1,2, Jing Wu1,2, Yani Lu1

  • 1School of Civil Engineering & Research Center of Hubei Small Town Development, Hubei Engineering University, Xiaogan 432000, China.

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概括

这项研究引入了一种新的算法,用于在经验模式分解 (EMD) 中抑制终点效应,用于爆炸地震波. 改进的方法增强了时间频率分析,使得对爆炸现场附近的结构进行更准确的危险评估.

关键词:
引发地震波的爆炸.经验模式分解分解终点效应的终点效应.危险控制 控制危险内在模式的功能是内在模式的功能.

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Last Updated: May 4, 2026

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科学领域:

  • 地质物理学 地质物理学
  • 信号处理 信号处理
  • 地震学 地震学

背景情况:

  • 爆炸引起的地震波是复杂的非线性和非静止信号.
  • 经验模式分解 (EMD) 与希尔伯特变换相结合用于地震波的时间频率分析.
  • 地震波的EMD处理受到终点效应的影响,导致内在模式函数 (IMF) 的分歧和不准确的时间频率结果.

研究的目的:

  • 为爆炸诱导的地震波提出一个改进的EMD终点效应抑制算法.
  • 为了提高对地震信号的时间频率分析的准确性.
  • 改善爆炸影响地区结构的安全评估.

主要方法:

  • 开发了一个EMD终点效应抑制算法,考虑了本地终点趋势,全球时间分布,能量和波形匹配.
  • 算法识别和替换终点信号片段,使用来自细分信号部分的匹配标准.
  • 使用模拟信号验证了该方法,并将其与镜像扩展,多项式拟合和极端值扩展进行了比较.

主要成果:

  • 拟议的算法有效地抑制了EMD终点效应,减少了IMF的分歧.
  • 对比研究显示,在减少误差标准偏差和改善相关系数方面,性能优越.
  • 该方法应用于实际爆炸的地震信号,改进了时间频率特征提取.

结论:

  • 改进的EMD算法为地震波分析提供了具有物理意义的IMF组件.
  • 对地震波的精确时间频率分析对于结构安全评估至关重要.
  • 这种方法对评估地震活跃爆破区的风险具有重大实际意义.