morlet 中文意思是什麼

An algorithm that can extract harmonics " amplitudes using morlet wavelets is put forward. compared with the full - wave fourier algorithm, the algorithm proposed in this article is more stable when the frequency of electric network flutters. meanwhile the algorithm has the rapidity of giving out the

在電網頻率波動情況下，通過比較說明短窗morlet復小波演算法在頻率波動過程中具有比傅氏演算法更穩定的特點，同時也可以達到1 3周波內完成的快速性。

It mainly includes following aspects : in this paper, firstly implication of wavelet analysis in signal harmonic component extraction is presented in detail, and on this foundation signal given frequency band component extraction method is proposed. then we investigate frequency aliasing phenomenon, reason why frequency aliasing phenomenon is easy happened when wavelet is implied in field of motor fault diagnosis, and frequency bands where frequency aliasing phenomenon is easer happened, and put forward approved morlet wavelet analysis method which can effectively alleviates frequency aliasing phenomenon. third we set up vibration signal detected system, design experiments to obtain three groups of fault signals : eccentricity fault, mixed fault of eccentricity plus mild rub, mixed fault of eccentricity plus moderate rub, and process these data using analysis method proposed in this paper

首先對論文的選題以及相關背景進行了探討，並對相關的小波基礎理論進行了闡述，主要針對感應電動機的偏心故障和偏心+碰摩復合故障形式及相關的應用演算法進行了詳細探討，主要工作內容包括下面幾個方面:在論文中，首先對小波分析在信號的諧波分量提取中的應用進行了研究，在此基礎上，提出了信號的特定頻帶成分的提取方法;研究了小波分析的頻域混疊現象，探討了小波分析應用於電機故障診斷領域時易發生頻域混疊現象的原因，以及混疊現象較易發生的頻帶，提出了可以有效減輕頻域混疊現象的改進的morlet小波分析方法;搭建了振動信號檢測系統，設計實驗採集得到三組故障數據:偏心故障，偏心+輕微碰摩復合故障，偏心+中度碰摩復合故障，並對這些數據應用本文提出的分析方法進行信號處理，提取出的特徵參數可有效區分這兩種故障形式;研究了基於matlab和labview的混合編程方法，完成了電機故障檢測系統的軟體開發。

The morlet wavelet transform is applied in choosing the fault line and detecting the transient high frequency signals. the virtues and flaws in various criterions and algorithm have been compared

利用morlet小波變換后的實部、虛部、模值以及相角來實現故障選線及暫態分量的提取，並比較了各種判斷方法及小波演算法的優缺點。

In order to analyze the rotation noise further, a new method for measuring the amplitude and phase of each harmonic component of periodic signal mixtures is established based on the morlet transform and fourier transform in theory, which will provide scientific warranty for reducing noise of disk mill

為了進一步分析爪式粉碎機的旋轉噪聲，理論上利用morlet小波變換結合fourier變換對旋轉噪聲各次諧波成分的振幅和初相位的提取，作了初步探討。

Analysis using method of morlet and mexican hat wavelet transform shows that there were 2 to 5 years and quasi - 7 years oscillations in the summer rainfall over shandong

結果表明，山東夏季旱澇存在著明顯的階段性和群發性的特徵。 1961 1978年雨澇發生頻繁， 1979 1992年是乾旱的群發階段，雨澇較少。

Morlet wavelet analysis shows that decadal period of longitudinal excursion of sah during summer is very notable, including a 10 - year period and a 25 - 30 - year period

對該系列進行小波分析發現夏季南亞高壓東西振蕩的年代際周期是非常明顯的，存在10年周期態和25 - 30年周期態。

In this thesis, continuous morlet wavelet and discrete daubechies2 wavelet are used. the main contributions is as follows : the instantaneous frequencies of psk and fsk signals are estimated by using wavelet transform

主要研究了連續morlet小波變換的應用，以及利用daubechies小波分解提取小波細節特徵向量進行信號識別的研究。

It can been predicted by morlet wavelet transform that the 10 years after 2000 would appear an increasing rainfall trend in summer in northwest china. ( 5 ) the drought and flood have obviously interannual oscillatory variabilities. the climate is moist from 1980 ' s to early 1990 ' s. it ' s the extremely dry period in the 40 years when the rainfall is plentiful while drought happened now and then after 1995

（ 5 ）西北地區夏季旱澇異常區區域旱澇指數的時間演變特徵表明：青藏高原東北側和渭水流域的夏季旱澇以20a與8a的年代際變化為主，北疆主要存在8 9a的周期振蕩，河西走廊即有15a周期振蕩，又有8 10a的周期振蕩。

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

本文以近年來被認為是fourier分析方法突破性進展的「小波理論」為基礎，採用morlet小波變換方法分析了黑龍江省近50年來的氣溫和降水的變化規律，並與傳統的功率譜分析結果進行了比較。