查询词典 wavelet

To protect copyrights of digital products effectively, proposed a new scheme of digital image watermarking based on the combination of discrete wavelet transformation and singular value decomposition.

为了有效地保护数字作品的版权，提出了一种以离散小波多级分解与奇异值分解相结合的数字水印新算法。

A novel modal parameters identification method based on wavelet transform and singular value decomposition is proposed .

提出了一种新的基于小波变换和奇异值分解相结合的结构模态参数识别方法。

In this method,image compression is completed by singular value decomposition of the wavelet coefficient.

提出了基于小波域奇异值分解的图像压缩算法，该算法通过对小波分解系数进行奇异值分解，进而对小波系数进行压缩，实现图像压缩。

Application of wavelet analysis in signal singularity detection［J］.

小波分析在信号奇异性检测中的应用［J］。

A new pitch detection algorithm is proposed using the theory of singularity detection of wavelet transform.

4利用小波变换的突变检测原理，提出了一种新的基音检测算法。

Based on the polynomial fitting of power function, FFT of sinusoidal function and 1-level decomposition of Daubechies wavelet, the simulation shows that the approximation of DT and the gradient depend on the width of horizontal distance spectrum.

文章基于幂级数多项式拟合、三角函数的FFT 和一级Daubechies 小波分解的理论分析以及数字地形的数值仿真，研究了近似地形的精确度与坡度的确定性因素。

It is found that generally the hydrologic noises exhibit skew characteristics, so that it is reasonably to use skew probability distribution to describing the noise components, and the wavelet coefficient threshold obtained by optimal entropy criterion based on information entropy theory in the global optimum.

分析结果显示，水文序列中的噪声成分具有偏态特性，因此本文应用偏态分布线型对噪声成分进行描述更为合理，而且小波系数阈值优选熵准则所得的阈值是基于信息熵理论而确定的，因此是整体上最优值。

Taking the inner surface of cylinder as the research object,a deeply study on skew surface topography with wavelet lifting scheme was made.

利用双正交小波的优点，使用提升方案，采用边界对称延拓策略，解决了传统滤波函数在突变处和边界处的畸变效应，并以缸套内表面为例，选用bior4.4双正交小波，证明了提升双正交小波在表面形貌分析中的改善作用。

The result indicates that the advantages of wavelet algorithm and the SNR of seismic signal improves.

实验结果表明，小波算法的优越性，水听器信号的信噪比得到了明显的改善。

The wavelet packet analysis applied in fault diagnosis system is studied in this thesis. Using simulation fault data, uncalm and time difference vibration signal of sodium pump are decomposed on different levels and frequencies.

对小波包分析应用于故障诊断进行了研究，利用仿真出来的故障数据，将快堆钠泵非平稳时变振动信号分解到不同层次和不同频带上，有效地提取出反映钠泵不同故障的特征向量，在识别中得到了满意的结果。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。