Each of smooth layers is called as intrinsic mode function, which represents the signal characteristics of different scales.
其中每一个平稳数据层被称为一个本征模式函数，它们代表了信号不同尺度的特性。
The EMD method and its adaptive filtering property in the process of obtaining the intrinsic mode function(IMF) were discussed.
讨论了经验模态分解方法及其在获取固有模态函数过程中的自适应滤波特性。
First we employ EMD method to decompose the crude oil prices in NYMEX, and obtain a series of intrinsic mode function (IMF), which are stationary and of strong periodicity, and a trend term.
首先利用EMD方法对NYMEX市场的原油期货价格进行分解，得到一系列平稳且具有较强周期性的本征模函数(IMF)和一个趋势项。
The natural longitudinal or torsional vibration of a wedge-shaped shaft is studied with perturbation method. The vibration mode function and the frequency characteristic equation are derived.
采用摄动法研究了楔形杆轴的固有纵扭振动，并且推导出了其固有纵扭振动的振型函数及频率特征方程。
A new method is introduced to decompose a signal into a set of IMFs (Intrinsic Mode Function) by virtue of fast band-pass filtering.
利用快速滤波建立了一种对信号进行本征模态函数分解的全新方法。
The thesis ends with a conclusion and prospect, pointing out problems and inadequacies, discussing the questions of the system structure mode, function, performance and the like.
最后对系统进行了总结和展望，提出了系统目前尚未解决的问题和存在的不足，并对系统结构模式、功能、性能、改进办法等问题进行了探讨。
The thesis ends with a conclusion and prospect, pointing out problems and inadequacies, discussing the questions of the system structure mode, function, performance and the like.
最后对系统进行了总结和展望，提出了系统目前尚未解决的问题和存在的不足，并对系统结构模式、功能、性能、改进办法等问题进行了探讨。
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