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time variant filter
相关语句
  时变滤波
     A DENOISING METHOD OF SEISMIC DATA BASED ON ITERATIVE TIME VARIANT FILTER OF DISCRETE GABOR TRANSFORM
     基于离散Gabor变换迭代时变滤波实现地震信号去噪
短句来源
     The iterative time variant filter via the discrete Gabor transform has been found extrmely powerful for wideband and nonstationary signal estimation. It not only is computational efficient,but also offers better SNR.
     基于离散 Gabor变换时变滤波对宽带和非平稳信号估计具有强大的能力 ,迭代时变滤波不仅计算上有效 ,而且能得到较好的信噪比。
短句来源
     In view of the characteristic of iterative time variant filter and the nonstationary property of seismic data,a method of the iterative time variant filter via the discrete Gabor transform for seismic data denoising is proposed. And for the limited frequency band and the distribution reguarities law of real seismic data,a simple method to the mask function is proposed.
     鉴于迭代时变滤波方法的特点和地震信号的非平稳性 ,我们提出了基于离散 Gabor变换迭代时变滤波方法实现地震信号的去噪 ,并根据实际地震信号的带限性及其频带分布规律 ,提出了简单的掩模函数求取方法。
短句来源
  “time variant filter”译为未确定词的双语例句
     The paper decomposes the original adaptive filter into a series of classical time invariant digital filter(pre-treated filter) and a lower order time variant filter(adaptive filter).
     本文将原有自适应滤波器分解为一个常规时不变数字滤波器(预处理滤波器)和一个低阶的时变滤波器(自适应滤波器)的级联。
短句来源
  相似匹配句对
     Time
     光阴
短句来源
     Time
     时间
短句来源
     4. Nonlinear and variant with time signal.
     4 非线性时变信号。
短句来源
     Blind Equalization on Time-Variant Channels
     时变信道的盲均衡
短句来源
     Decomposition of Time-Variant Modal by Time-Frequency Filter
     基于时频滤波的时变模态分解方法
短句来源
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  time variant filter
An example is the case of representing a signal which is the output of time variant filter.
      
A training sequence of 14 symbols is transmitted every 256 symbols, to train the time-variant filter.
      


Two key points in high resolution seismic prospecting for coal are (1) to design reasonable acquisition parameters for exploration tar- get,and (2) to preserve useful high frequency components as many as possible during data processing.In the coal seismic exploration in CH basin,we used the following reasonable acquisition parameters. lms sampling interval,235m maximum offset,10m group interval and 16-250 Hz frequency band.In seismic data processing,high-pass filte- ring,band-pass filtering and time-variant...

Two key points in high resolution seismic prospecting for coal are (1) to design reasonable acquisition parameters for exploration tar- get,and (2) to preserve useful high frequency components as many as possible during data processing.In the coal seismic exploration in CH basin,we used the following reasonable acquisition parameters. lms sampling interval,235m maximum offset,10m group interval and 16-250 Hz frequency band.In seismic data processing,high-pass filte- ring,band-pass filtering and time-variant filtering are respectively used according to different normal reflection times(to times);the length of deconvolution operator ranges from 60 or 70 samples;white noise accounts for 10-15%;and particularly,refined velocity analysis,true amplitude recovery and migration technique are applied to data pro- cessing.Coal seam can be approximately located using instantaneous information,interval velocity,reflection coefficient and bright spot. Furthermore,the minor fault whose throw is only half phase,uncon- formity and palaeochannel can be clearly shown on the high resolution seismic section.

在煤田高分辨率地震勘探中,首要的问题是针对研究的对象设计合理的采集参数,在资料处理过程中要尽量保持已采集到的高频有效信息。在CH盆地的煤田地震勘探中,采样间隔选为1ms,最大炮检距为235m,道距为10m,接收频宽为16—250Hz。在资料处理中,针对不同的t_0时间,分别实施高通、带通和时变滤波;反褶积因子长为60、70个样,白噪因子为10~15%;注重精细速度分析、真振幅恢复和偏移技术的应用。利用瞬时信息、层速度、反射系数和亮点显示,能够近似地识别出煤层的空间位置。此外,利用高分辨率地震剖面还可识别出错动半个相位的断层,并清楚地显示地层不整合接触关系和古河道的形态。

Introduces an adaptive algorithm which can reduce computing complexity and improve the quality of known adaptive algorithms. The paper decomposes the original adaptive filter into a series of classical time invariant digital filter(pre-treated filter) and a lower order time variant filter(adaptive filter). The pre-treated filter improves the coherence between the input and the desired response,and the decrease in order reduces operations of the algorithm.

提出了一种可以在现有自适应滤波算法基础上减小运算量、提高性能的自适应滤波算法。本文将原有自适应滤波器分解为一个常规时不变数字滤波器(预处理滤波器)和一个低阶的时变滤波器(自适应滤波器)的级联。预处理滤波器改善了输入与参考之间的相干性,而降低自适应滤波器的阶数则降低了算法运算量。

In this paper, a new method is presented to realize time variant filtering based on the linear characteristic of the Fourier Transformation. This method can increase the signal to noise ratio of received signals whose high frequency components reduce gradually during propogation.

提出一种基于富里叶变换线性性实现时变滤波的方法,该方法可提高某些在传播过程中随着传播时间增加其高频成分逐渐减少的接收信号的信噪比。

 
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