您要查找的是不是:
- intrinsic mode frequency 本征模函数
- The main effect is to raise the fundamental slosh mode frequency. 主要作用是提高基本的晃动频率。
- It is based on the empirical mode decomposition (EMD), which generate a set of intrinsic mode functions (IMF). 这个方法是以称为经验模态分解(EMD)的方式产生一组本质模态函数(IMF)为基础。
- EMD method decomposes pulsar signal into a group of Intrinsic Mode Functions(IMF). 利用经验模态分解将信号分解为一组固有模态函数(IMF)。
- It is based on the empirical mode decomposition (EMD), which generates a set of intrinsic mode functions (IMF). 这个方法是以称为经验模态分解(EMD)的方式产生一组本质模态函数(IMF)为基础。
- Results indicate that intrinsic mode functions (IMFs) in EMD represent gearbox vibration mode more efficiently than DWT components. 结果表明 ,通过EMD分解获得的齿轮箱振动内在模式分量 (IMFs)能很好地辨识出齿轮的啮合振动模式 ,且比离散小波方法的分解效率更高 ;
- The time series was decomposed into several intrinsic mode components (IMCs) via EMD so as to make every component stationary. 首先,针对时间序列的非平稳特征,通过经验模式分解将其分解为若干个本征模式分量,使其中每个分量均成为平稳序列;
- It shows that the modal shape and mode frequency are highly coupled with the VIV response of a marine riser with low mass ratio. 该模型的计算结果表明,立管的模态振型、模态频率与涡激振动响应高度耦合,并且对于低质量比的情况尤为明显。
- The EMD method is used to decomposed the track of each sensor into many of intrinsic mode function (IMF) components which form initial matrixes. 首先采用EMD方法将各传感器的航迹信息分解为多个固有模态函数(IMF)之和;
- The increased riser length lowers its mode frequency and mode curvature, thus a longer riser has better VIV fatigue characteristics. 长度增加导致隔水管模态频率与模态曲率降低,使得隔水管具有更好的VIV疲劳特性。
- A software I DEAS was used to analyze the mode character of a three part bus frame,to calculate its mode frequency and to discuss the whole frame's rigidness and stress. 该文利用I-DEAS软件对某客车三段式车架进行了模态分析,计算车架的模态振型,从整体考虑车架的刚度与强度问题;
- A noise filter(EMD noise filter hereinafter) based on the characteristic of IMF(intrinsic mode function) is developed. Then,simulated data and real data(i.e.,GPS data) are used to test the method separately. 根据EMD分解白噪声而得到的本征模式函数(IMF)分量的能量密度与其平均周期的乘积为一常量这一特性,建立一种新的基于EMD滤波去噪方法,并将该方法应用于GPS多路径效应的研究中。
- In order to accurately detect the beginning and end time of transient fluctuation,the voltage signal is decomposed into intrinsic mode function(IMF) elements by EMD,and then,their Hilbert spectrum are calculated. 应用研究表明,对暂态闪变信号进行EMD分解,再对得到的各IMF分量求HHT谱,可以精确地检测到暂态电压波动发生的时刻和终止的时刻;
- Firstly, separate the series data are seperated into intrinsic mode functions(IMFs) using empirical mode decomposition(EMD),Then,the Winger distribution transformation is applied to every IMFs. 通过把振动信号序列进行EMD分解 ,然后对每个分解后的IMF进行Winger分布分析 ,可取得抑制频率干扰的效果 ,使时频谱图更清晰。
- Firstly, vibration signals are decomposed into several IMFs (intrinsic mode functions), then the Renyi entropy of each IMF is computed and regarded as the input characteristic vectors of LS-SVM for fault classification. 该方法先对振动信号进行EMD分解,得到多个基本模式分量(Intrinsic mode function,IMF)后,求出表征故障信息的若干个IMF的Renyi熵,再将其作为特征矢量输入LS-SVM进行故障分类。
- The variety of vibration frequency with tetragonal strain shows that the soft mode frequency increases with the tetragonal strain increasing followed by the transition of unstable soft mode to stable vibrational mode at a certain critical point. 振动频率随四方应变的变化关系表明,随著四方应变的增大,软模的频率增大,在某一个临界点,不稳定的软模转变为稳定的振模。
- Firstly, tested signals are decomposed into number of intrinsic mode functions (IMFs) by using local wave method, and time-frequency spectrums of IMFs are acquired by means of Hilbert transformation. 首先使用局域波法将实测信号分解为多个基本模式分量,经过希尔伯特变换得到各分量的时频谱;
- At first, the vibration signals of gas valve for reciprocating compressor are decomposed into several intrinsic mode functions by EMD, and then correlation dimension for every IMF is extracted. 首先利用EMD方法分解压缩机气阀振动信号,得到若干个固有模态函数分量,然后计算固有模态函数分量的关联维数。
- Sound example 6: Chords followed by bass notes with different longitudinal mode frequencies (six versions). 健全例如6:和弦其次是低音注意到不同纵模频率(6版)。
- Sound example 5: "Yankee Doodle" played on strings tuned to the same pitch (transverse frequency) but with different longitudinal mode frequencies (two versions in different keys). 健全例如5:“扬基歌”上播放字符串调整同一球场(横向频率),但不同的纵模频率(两个版本在不同的键)。