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geophysical signals
相关语句
  地球物理信号
     The time-frequency analysis of geophysical signals based on Cohen distributions
     基于科恩分布的地球物理信号的时频分析
短句来源
     In consideration of the nonlinearity inherent in geophysical signals resulted from the high heterogeneity and anistropy of the earth medium, these models are used in processing multichannel seismic signals.
     考虑到大地介质高度的非均质性和各向异性引起的地球物理信号的非线性,将这种神经网络应用到了地震资料处理之中。
短句来源
     Geoacoustic,a kind of geophysical signals,is characterized by non-stationari-ness which must be considered in analyzing its spectral characteristics. In this paper,the Wigner distribution (WD),one of the most popular time-frequency distribution,is used for spectral analyses of geoacoustic signals captured in the deep well which is located in the middle of the well-known Tancheng-Lujiang fault.
     地声是一种具有非稳态特征的地球物理信号,分析其谱特征时须有别于稳态信号.本文以位于郯庐断裂带中段上的深井中所捕捉到的地声信号为例,用Wigner分布对地声信号作时-频谱分析.结果表明,地声信号的能量主要分布在100.00~170.00Hz范围;
短句来源
     Results show that in the condition that the parameters of kernel function are properly selected, the generalized bilinear time frequency representation is a powerful means in analysing geophysical signals.
     结果表明 ,在核函数参数选取适当的情况下 ,广义双线性时频表示是分析地球物理信号的有力工具
短句来源
     In this paper, it is described that the time-frequency resolution of geophysical signals is affected by the time window function attenuation coefficient and sampling interval and how such effects are eliminated effectively.
     窗函数的衰减系数和采样间隔究竟对地球物理信号时频分辨率造成多大的影响,如何才能更好地消除这种影响,是该文的主要出发点。
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  “geophysical signals”译为未确定词的双语例句
     Processing and interpretation of geophysical signals in exploration of hydrogeology and engineering geology
     水工勘测中物探观测信号的处理及解译
短句来源
     Then, geophysical signals usually have the property of non-minimum phase.
     这种情况下,如果仍然用功率谱方法处理这种具有非最小相位特征的信号,则会使解释结果出现偏差。
短句来源
  相似匹配句对
     DIGITAL PROCESSING OF THE POLARIZATION STATE OF GEOPHYSICAL ULF SIGNALS
     ULF地球物理信号偏振状态的数字处理
短句来源
     of broadcasting signals.
     主要实现了对异地广播信号的实时监测,录音,数据存储,异常告警等功能。
短句来源
     the geophysical method.
     同位素法和地球物理法.
短句来源
     Processing and interpretation of geophysical signals in exploration of hydrogeology and engineering geology
     水工勘测中物探观测信号的处理及解译
短句来源
     recombination of signals.
     信号重组。
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  geophysical signals
A model is discussed for the spectral decomposition of stationary periodic and non-periodic functions, suitable for studying various geophysical signals.
      
A comparison between MEM and FFT for the spectral analysis of geophysical signals
      
The altitude and latitude appearances of the long-term geophysical signals like solar (1-2%) and QBO (2-7%) are investigated.
      
Because of the highly non-stationary character of our geophysical signals, the latter two tools are better suited for this analysis.
      
An excellent agreement in both the amplitude and phase response is shown at frequencies between -5 and +?5 cycles per year, which is the frequency band with expected geophysical signals.
      
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All pass filter, which is very important in geophysical signal processing, is completely determined by its phase shift and group delay. The characters of phase shift and group delay are controlled by the number and position of zeroes and poles. This paper describes how the phase shift and group delay vary when the zero and pole of an all pass filter with signal zero and pole move on the Z plane and when the pole approaches the unit circle. The result is generalized to all pass filters with M zeroes...

All pass filter, which is very important in geophysical signal processing, is completely determined by its phase shift and group delay. The characters of phase shift and group delay are controlled by the number and position of zeroes and poles. This paper describes how the phase shift and group delay vary when the zero and pole of an all pass filter with signal zero and pole move on the Z plane and when the pole approaches the unit circle. The result is generalized to all pass filters with M zeroes and poles, even infinite zeroes and poles.

在地球物理信号数字处理中占有重要地位的全通滤波器,完全由其相移和群延迟决定。而滤波器的零点、极点个数及其位置又完全决定了其相移和群延迟的性质。本文讨论了单零、极点全通滤波器的零、极点在Z平面移动以及极限逼近单位圆时的相移和群延迟性质,并将结果推广到M个零、极点乃至无穷多个零点、极点的全通滤波器(后者以柏拉什克函数为其全通函数)。

This paper is based on the capability of artificial neural network in expressing nonlinearity inherent in input data and the mechanism to propagate signals through neural network. Two multi-layer feedforward neural 'network models for filtering and dimensionality-reduction of multidimensional data and their implementation are proposed. In consideration of the nonlinearity inherent in geophysical signals resulted from the high heterogeneity and anistropy of the earth medium, these models are used in processing...

This paper is based on the capability of artificial neural network in expressing nonlinearity inherent in input data and the mechanism to propagate signals through neural network. Two multi-layer feedforward neural 'network models for filtering and dimensionality-reduction of multidimensional data and their implementation are proposed. In consideration of the nonlinearity inherent in geophysical signals resulted from the high heterogeneity and anistropy of the earth medium, these models are used in processing multichannel seismic signals. The results from the experiments with synthetic seismic records have verified the effectiveness of this neural network approach.

基于人工神经网络的非线性表达能力和信号在神经网络中传播的机理,提出采用多层前馈神经网络模型实现多维数据的非线性滤波及降维。考虑到大地介质高度的非均质性和各向异性引起的地球物理信号的非线性,将这种神经网络应用到了地震资料处理之中。采用人工合成的多道地震记录试算,结果证明了这种方法的有效性。图6参7

This paper gave a brief review of recent situation in processing geophysical signals home and abroad. It covered extracting weak geophysical signals on strong nisc backgroud, processing of nonstationary geophysical signal, development of modern spectral estimation, application of temporal spectral theory in geophysical signal processing, the recovering of distorted signal, and concerning problems about signal processing.

本文简要叙述了近年来我国地球物理信号处理的进展和国际动态.其中包括:强干扰背景下微弱地球物理信号的提取;非稳态地震前兆信息的处理;现代谱估计的进展;瞬态谱理论在地球物理资料处理中的应用;畸变信号恢复的研究以及其它有关信号处理的研究.

 
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