2) wavelet coefficients quantization 小波系数量化3) wavelet energy 小波能量 1. The electromechanical equipment state detection based on the wavelet energy is used. 讨论了交—交变频调速系统故障诊断的重要性,在当前的检测方法与故障诊断手段研究的基础上,提出了基于DSP和小波分析的变频调速系统故障诊断方法...
The method comprises the steps of firstly, performing wavelet multi-scale analysis on the energy consumption data, and after obtaining the wavelet coefficients at different scales, removing the wavelet coefficients belonging to noise and remaining the wavelet coefficients of usable signals, thereby ...
In this paper, we present a novel differential energy watermarking algorithm based on the wavelet tree group modulation structure, i. e. WTGM (Wavelet Tree Group Modulation). The wavelet coefficients of host image are divided into disjoint super trees (each super tree containing two sub-super ...
称为小波系數(Wavelet coefficients)。这样子的程序以在不同的位子和不同的伸 ir.nuk.edu.tw:8080|基于3个网页 3. 小波参数 ...来分析纹理影像,实验证实我们 所采行的方法较传统的小波参数(wavelet coefficients)有更好的 辨识率。 ir.lib.nthu.edu.tw|基于 1 个网页 ...
HFEP can be obtained by subtracting the low-frequency energy percentage from 1 because of energy conservation. LLk(p,q) are the wavelet coefficients in the approximation subband. STD STD=∑i=−∞+∞(c(i)−∑−∞+∞c(i)p(i))2p(i) p(i) is the probability of the wavelet ...
is a pixel value. after applying the discrete wavelet transform, the wavelet coefficients \(w_i\) conserve the energy, footnote 2 so the energy in the time-frequency domain is: $$\begin{aligned} e= \sum _{i=0}^{w-1} \sum _{j=0} ^{h-1} w_i^2 \end{aligned}$$ (103) by...
energy spectrum coefficients under every working condition had been calculated. The judgment basis for the slewing bearing fault had been obtained by the distribution law of wavelet energy spectrum coefficients under different working conditions. This study lays a theoretical foundation for the fault ...
Beylkin ("beyl") Has 18 coefficients and has 3 vanishing moments. "beyl" Coiflets ("coif") Scaling function and wavelets have same number of vanishing moments N "coifN", where N = 1, 2, ..., 5 coifwavf Daubechies ("db") Extremal phase; energy concentrated near the start of the...
It is a robust cross-correlation technique in the wavelet domain , which uses only the sign of the wavelet coefficients. The probability distribution of ... S Klimenko,G Mitselmakher,A Sazonov 被引量: 20发表: 2002年 Wavelet-crosscorrelation analysis: Non-stationary analysis of neurophysiological...
An audio zero-digital watermarking algorithm based on energy difference of wavelet coefficients was proposed. Original audio signal was decomposed by wavel... LU Hongwei,PI Bingfeng,鲁宏伟,... - 《计算机应用》 被引量: 3发表: 2007年 An open and parallel multiresolution framework using block-based...