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wavelet
- 谐波分析 功率谱分析 交叉谱分析课程及例子-The harmonic analysis of power spectrum analysis courses and examples of the cross-spectral analysis
cross-wavelet-transform-
- 详细介绍了交叉小波变换，连续小波变换，并将其运用到实际地理气象序列中。-Cross wavelet transform was introduced in detail, the continuous wavelet transform, and applied it to the actual geographical meteorological sequences.
Influence-of-ENSO
- 利用连续小波变换，交叉小波变换研究ENSO对长江流域径流的影响。-Using the continuous wavelet transform, ENSO cross wavelet transform research on the influence of the Yangtze river basin runoff.
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- 本文针对基于经验模态分解ＥＭＤ的时空滤波器存在的固有模态函数分量中频率混叠交叉导致有用信号与噪声一起被滤除的问题结合小波在时间尺度两域表征信号局部特征的特性提出了一种基于能量估计实现ＥＭＤ分解层数确定-In this paper, based on empirical mode decomposition EMD temporal filter mode functions inherent component of cross-frequency aliasing and noise toge
dual-tree
- 首先将非平稳的故障振动信号进行双树复小波包分解，得 到不同频带的分量；然后对每个分量求其峭度值和相关系数并进行比较；最后选取峭度值和相关系数较大的分量 进行软阈值降噪和双树复小波包重构，即可有效地消除振动信号中噪声的干扰，同时保留信号中的有效信息即实 现了故障特征信息的提取。-In view of the above situation, a new fault diagnosis method is proposed based on dual-tree complex wa