Lastly, the paper introduces wavelet package transform and its application. Wavelet package transform grows on the basis of wavelet transform.
最后，论文介绍了小波包变换的相关理论及其应用。
参考来源 - 小波变换在管道漏磁检测信号分析技术中的应用Applying it to de-noising of PD signal and simulation result was given in the paper. Experiment shows that de-noising based on wavelet package transform analysis method can get satisfactory result.
对仿真波形、最小均方误差的分析表明利用惩罚函数阈值的小波包变换具有比小波变换更好的消噪效果。
参考来源 - 基于小波变换的局部放电信号消噪研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The lifting wavelet package transform based on interpolating subdivision was introduced. The engine cylinder head vibration signal's time-frequency characteristics were analyzed.
分析了移动装备发动机缸盖振动信号的时频特性，介绍了插补细分提升小波包变换算法。
In order to on-line process engine cylinder head vibration signals of mobile equipment, a de-noising method with gradual changing threshold based on lifting wavelet package transform was proposed.
为了实现移动装备发动机缸盖振动信号的在线处理，提出一种基于提升小波包变换的渐变式阈值降噪方法。
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