查询词典 wavelet

On this condition, some useful features have been found in the space domain. Wavelet spectrum estimation method has been used to extract the features in the space domain because the wire rope signal is a kind of none-stable signal. In order to discuss the physical meaning of this method, this dissertation proposes the relationship between Fourier spectrum and wavelet spectrum.

为进一步进行特征提取的需要，根据钢丝信号属于非平稳信号的事实，对信号给出了小波谱估计，以及Fourier谱和小波谱之间的关系和有效的小波谱计算方法，并在对实际钢丝信号小波尺度谱分析的基础上，给出一种信号的小波谱量化的方法，提取了信号的小波谱特征。

Wavelet packet decomposition can decompose high-frequency part of signal. In order to obtain the energy rate index of each node this paper advances apply wavelet packet decomposition method to node response of pipe. And then use statistics method to analysis the energy rate index indicator of various nodes in pipe. Results show this method not only can detect the locations of damage in pipe, but also can get a preliminary study for quantify the damage degree damage of pipe.

本文提出将小波包分解方法应用于管道的节点响应，得出各个节点的能量率指标，并利用数理统计方法对管道上各个节点的能量率进行统计分析，结果表示该法不仅能确定管道的损伤位置，而且还能对管道损伤程度的定量分析作一个初步的研究。

Based on the technology of edge detection by wavelet transform,a new method of detecting seam of welding pipe using Gauss wavelet is proposed.

在小波边沿检测技术的基础上，提出了一种基于Gauss小波的焊缝检测的新技术。

Based on the time-frequency analysis (continuous wavelet transform and short time Fourier transform), the arithmetic uses the modulus maximum characteristic on the phase scale and carry frequency scale to recognize phase modulation rule of signal. So without whole wavelet coefficient the signal mathematics model can be obtained quickly. It provides well condition for application of arithmetic in practice.

该算法基于信号的时频分析（小波分析和短时傅里叶变换），利用小波变换的相位尺度和载波尺度的模极大值特征辨识信号的相位调制规律，因而在无需计算全部小波系数的情况下，可快速地获得信号的数学模型，为算法在实际中的应用提供了良好的条件。

Due to different properties of the signal and noise in wave-let coefficient modulus under different scale of wavelet transformation, we can extract the edge characteristic through detecting the local maximum of the wavelet transformation coefficient modulus.

基于信号与噪声在不同尺度下小波系数模的变化特征，可以通过检测小波变换系数模局部极大值来提取图像的边缘特征。

In this paper, image fusion method based on a sort of non-separable wavelet (Red-Black Wavelet) was proposed.

利用Geert Uytterhoeven提出的一种非张量积小波（Red-Black小波）来进行图像融合。

Firstly, we constructed Red-Black Wavelet by Lifting Scheme. Secondly, we applied the Red-Black wavelet to two image fusion experiments: fusion of multifocus images; fusion of CCD and IR images. Finally, we evaluated the method's performance by some objective criteria based on statistics or informatics.

首先基于提升框架的思想构造Red-Black小波，然后将其应用于两组图像融合实验：不同聚焦点图像融合与可见光－红外图像融合；并分别采用基于统计特性和信息量的评价指标，将本文方法与db4张量积小波的图像融合方法进行了比较。

According to the edge detection theory based on modulus maxima of wavelet transform, an infinitely differentiable wavelet with good antisymmetry was deduced to extract the edges of defects from X ray spot weld inspection images.

基于小波模极大值边缘检测原理，推导出一类具有良好反对称性的无限光滑小波并运用于点焊缺陷的边缘提取。实验表明，该方法能有效地提取缺陷边缘，并能获得较好的效果，从而为小波理论在工业 X射线无损检测中的应用作了初步探

According to the edge detection theory based on modulus maxima of wavelet transform, an infinitely differentiable wavelet with good antisymmetry was deduced to extract the edges of defects from X ray spot weld inspection images.

基于小波模极大值边缘检测原理，推导出一类具有良好反对称性的无限光滑小波并运用于点焊缺陷的边缘提取。

The method of wavelet packets decompositions originating from wavelet transform is more accurate in signal analysis, with the predominance of analyzing details information of high frequency.

小波包分解是从小波变换延伸而来的一种更精细的信号分析算法，具有分析高频特征信息的优势。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。