优势频率 meaning in English
dominance rfequency
predominant frequency
Examples
- The distributions of the values of fluctuating pressure conform to the law of normal distribution ; and the dominant frequency is low frequency
脉动压强幅值分布符合正态分布规律，优势频率为低频。 - In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal , wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station , in which the signal is decomposed into different frequency band , and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基于李家峡水电站双排机组振动的现场试验研究，并且针对传统频谱分析方法傅立叶变换( fft )对于非平稳信号已力不从心这一缺陷，利用小波分析方法在时域和频域上同时具有良好的局部化性质，通过对开停机这一典型非平稳过程信号进行小波及小波包分析，将其分解到不同频带内，获取微弱信息和提取优势频率，并对其作振源分析，得出开停机初始时刻因水流不稳均出现强烈的振动现象，且低频段信号能量最大，开停机过程水流脉动压力和尾水涡带摆动是引起定子基础振动的主要原因。 - So a new method is proposed that combines the traditional transfer function and coherence function analysis with the statistics of frequencies to obtain the dominant frequencies , which can reflect how the noise sources influence the bus interior noise level in frequency domain , and which will provide reliable references to make up plans in reducing the bus interior noise
对此提出了在传统的传递函数和相干函数分析的基础上结合频率统计，选出优势频率的方法来考察噪声源对车内噪声的影响，为制定客车车内噪声治理方案提供了可靠的依据。 - The clues and techniques to improve the resolution of data processing are 1 ) removing the affection of near surface factors on data acquisition , including static correction and noise eliminating technique etc , 2 ) broadening the frequency band of pre - stack seismic data , including amplitude compensation and pre - stack deconvolution etc , 3 ) improving s / n ratio of high frequency and weak reflection signals through multiple coverage with high precision velocity analysis , residual static correction and high - order nmo , raising " dead line of high frequency reflection " , and 4 ) identifying post stack effective reflection frequency band , enhancing dominant frequency and so on
主要包括：消除近地表因素对资料采集的影响，包括静校正和噪音压制技术等；叠前拓宽地震资料领带，包括振幅补偿和叠前反褶积技术等；借助高精度速度分析、剩余静校正和高次项nmo技术，通过多次覆盖叠加，消除资料中随机噪声干扰、提高资料信噪比，尤其是高频端反射信息的信噪比，改善高频反射和弱反射信号信噪比，提高“高频反射死亡线” ；叠后有限反射颇带识别、抬高优势频率等。