power spectral analysis meaning in Chinese
功率光谱分析
功率谱分析
Examples
- The digital msk demodulation based on the dsp system employed the theory of power spectral analysis to demodulate the digital msk modulated signal
在本文中的数字化解调是基于dsp系统，并利用功率谱估计的理论对msk已调信号进行功率谱的估计来实现的。 - The power spectral analysis is performed for daily 500hpa height field data in the mid - high latitudes of the northern hemisphere from 1950 to 1996 . the results show that : ( 1 ) intensity of low - frequency oscillation in winter is stronger than that in summer
应用1950 - 1996年北半球中高纬逐日500hpa高度场资料进行功率谱分析，得出： ( 1 )夏季低频振荡较弱，冬季低频振荡较强。 - ( 3 ) though the conventional fourier power spectral analysis can reflect the common characteristics of the signal , it cannot provide the fine structure of time - frequency changes and the location of the jump points , while the wavelet transforming can better the situation
传统的功率谱分析方法虽然能反映气候信号变化的一般特征，但无法反映时频域变化的精细结构，也不能给出突变点的具体位置；而小波变换分析方法则可以很清楚地给出气候信号变化的多层次结构和突变特征。 - In this paper , based on the wavelet theory which is considered an important breakthrough to fourier analysis , the variations of air temperature and precipitation during the recent 50 years in heilongjiang province have been analysed using the morlet wavelet transformation method . wavelet transformation with fourier power spectral analysis are compared
本文以近年来被认为是fourier分析方法突破性进展的“小波理论”为基础，采用morlet小波变换方法分析了黑龙江省近50年来的气温和降水的变化规律，并与传统的功率谱分析结果进行了比较。 - According to structural characteristics of multi - phased alloy steels and the properties of ultrasonic propagation , microstructures characterization with different heat treatment processes ( normalizing , quenching / annealing , quenching plus low tempering , quenching plus high tempering ) for three steels ( 40cr , 38crmoal , gcrlssimn ) was studied experimentally by using ultrasonic methods . ultrasonic velocity , relative attenuation coefficient , and power spectral analyses were researched on the same samples respectively , on the basis of theory and experiment , the sensitivity and other characterizations of the three methods used to distinguish different microstructures were compared
根据具有多种相结构合金钢不同热处理转变产物的组织特点，以及超声波在其中的传播规律，利用超声波速度、相对衰减系数以及功率谱分析三种方法，对三种钢( 40cr 、 38crmoal及gcr15simn )不同热处理(正火、淬火退火、淬火+低温回火及淬火+高温回火)转变产物的显微组织进行了超声表征研究。