查询词典 wavelets

It is a nonlinear system and it is not necessary to assume that wavelet is minimum phase. Wavelets and reflection coefficients can be separated in homomorphic deconvolution; however, how to choose the optimum wavelet needs a lot of manual time and processing experiences.

它是一种非线性系统，对地震子波不做最小相位的假设条件，只需能分离出地震子波和反射系数，在分离出的地震子波当中，如何选取最合适的地震子波是一个需要花费大量的人工时间和需要一定的经验。

We investigate wavelets and multirate filter banks with applications to interference suppression in this dissertation, which consists of five parts.

本论文研究小波变换与多速率滤波器组理论及其在抗干扰技术中的应用。

We investigate wavelets and multirate filter banks with applications to interference suppression in this dissertation, which consi...

本论文研究小波变换与多速率滤波器组理论及其在抗干扰技术中的应用。

Based on the Ref［1］, a so-called papilionaceous algorithm for constructing the orthogonal complex filter banks is presented, which was used to easily design orthogonal complex filter banks and wavelets on arbitrary length compactly supported sets by the optimizations of the parameters.

在以往研究成果的基础上，建立了构造正交复滤波器的蝶形算法，该算法便于计算任意长度紧支集复滤波器，便于优化参数设计所需的滤波器与小波。

On the basis of realizing the recognition of polygenetic faults, self-adaption zero pole filter model based on wavelets decomposition and variable time base self-adaption process model is suggested.

在实现多源故障识别的基础上，提出了基于小波分解的自适应零极点滤波模型和变时基自适应处理模型，用于提取和分析弱故障振动信号，以确定故障的早期征兆和类型。

The findings: with the apparent dominant frequency of the Ricker wavelet rising, the detection SNR will get worse gradually, it is obvious that the variety of the SNR is slower during the portion of high frequency than during the portion of low frequency; in the usual range of seismic prospecting frequency, the SNR of the chaotic oscillator detection system could partially make up the amplitude attenuation aroused by the transmit of the seismic wave; the results could provide help for detecting the event constituted by aberrant wavelets.

本文以Ricker子波模拟地震子波，研究Ricker子波视主频变化的相应检测效果。研究结果：随着Ricker子波视主频的升高，检测SNR逐渐变差，在高频部分SNR的变化明显比低频部分缓慢；在通常地震勘探频率范围内，混沌振子系统检测SNR有可能部分补偿由于地震波传播引起的幅度降低；为检测由畸变子波构成的同相轴提供一定的可能。

Color filter design based on rugate wavelets theory.

基于梳状小波理论的颜色滤光片设计。

Especially, the symmetry and high rank vanishing moments of wavelets are very important for subband coding.

特别是在子带编码中，小波的对称性以及高阶消失矩特性起着非常重要的作用。

This algorithm can not only approximate the solutions well given by Daubechies,but also give wavelets which have better symmetricality and locality.

它不仅计算出了Daubechies小波的滤波器系数，还可以得到其他对称性与局部性更好的小波。

The channel model of visual information abstracting with DOG wavelets is presented and discussed.

在文中讨论了这一模型的特点和潜在的应用前景。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。