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Polytechnic, Changsha 410208, China) Abstract:Wavelet decomposition levels were selected according to the characteristics of fault signal and wavelet transform multiscale decomposition property... on wavelet transform 4 模糊模式识别 将待检状态的特征向量E设为模糊向量,再用Bi表示表1中第i行构成的向量,即表示第i种故障的标准模糊向量,Bi中的第j个分量用Bij表示.其中,i取值范围为1~9;j取值范围为1~7.其模糊模式识别[14-15]是按贴近原则归类方法进行的,即比较待检模糊向量同哪一种故障的标准模糊向量最贴近(距离最小或贴近度最大),就确定为该种故障......
transform; wavelet transform; multi-scale analysis; separation of wave field; [全文内容正在添加中] ......
)11-4122-07 Bearing early faults diagnosis based on tunable Q-factor wavelet transform and spectral kurtosis YU Fajun1, 2, ZHOU Fengxing1 (1. Engineering Research Center of Metallurgical Automation..., China) Abstract: Through studying bearing faults mechanism, a new fault diagnosis method based on tunable Q-factor wavelet transform and spectral kurtosis was proposed. Firstly, the range of Q-factor......
of Physics Science and Technology, Central South University, Changsha 410083, China) Abstract: Based on the multi-resolution of wavelet transform and chaotic system having a good immunity to noise... Jian-li. A new threshold function for signal denoising based on wavelet transform[J]. IEEE Computer Society, 2010: 1(3): 200-203. [5] Haykin S, Li X B. Detection of signal in chaos[J]. Proceeding......
, Changsha 410083, China; 3. Henan Zhoukou Power Supply Bureau, Zhoukou 466001, China) Abstract: Wavelet matrix classification, which takes advantage of redundancy of the stationary wavelet transform... into sub-space by the stationary wavelet transform, singular value is obtained by singular value decomposition of wavelet coefficient matrix, and the essential of singular value decomposition......
are analyzed. The algorithms of wavelet based image enhancement are also deduced and generalized. Wavelet transform modulus maxima (WTMM) is a method for detecting the fractal dimension of a signal, it is well... results demonstrate that the image enhancement algorithm based on wavelet transform is effective for image de-noising and enhancement. Wavelet transform modulus maxima method is one of the best methods......
; 文章编号:1672-7207(2008)04-0805-05 Speech pitch period detection and it’s implementation on DSP based on wavelet transform and spatial correlation function CHEN Ning, HU An-feng, LAI... between the two chips was implemented through McBSP on TMS320VC5509. Pitch period of the speech acquired was detected based on the principle of singularity detection of signals with wavelet transform......
, China) Abstract: A new diagnosis method by using wavelet transform and the generalized correlation cepstrum was introduced for shallow and coarse-grained materials. The wavelet for multi-resolution... of shallow and low SNR faults is improved by the method using wavelet transform and the generalized correlation cepstrum. The fault diagnosis results are consistent with the actual results, so......
and filtering is analyzed first in the paper. The advantage of adjustable time-frequency window of wavelet transform is introduced. Secondly the relationship between harmonic wavelet and multiple analytic... included in the harmonic wavelet transform is founded. Thirdly, by extending the harmonic wavelet transform, the concept of the adaptive harmonic window and its theoretical equation without......
wavelet transform’s multi-resolution analytical characteristics and Wigner-Ville distribution’s high time-frequency energy- focusing performance, a wavelet-SPWVE time-frequency algorithm of locating... of information. The effectiveness of the method is verified by examples of track diseases, i.e., the weld-type and convex-type profile. Key words: track irregularity; wavelet transform; Wigner-Ville distribution......