wavelet function 中文意思是什麼
wavelet function
解釋
小波基函數（小波基）-
This thesis studies the law of affecting de - noise result and the selection of the threshold and the wavelet function, the combination of wavelet and fft in the fault diagnosis of turbine - generator sets : by the de - noise anslysis of blocks and sin signals, concludes : to blocks signals, usually adopts soft threshold ; the law of affecting de - noise result is when use wavelet auto - de - noise, with the increasing of decomposed level, the de - noise result becomes worse while the level blow the 3, when the level above 3 and when uses wavelet packet, it is the other way round ; the best de - noise methods of the signal is that uses " dbl " wavelet function, three level, soft and " rigrsure " threshold
本文研究了分解層數對消噪結果影響的規律和閾值、小波函數的選取，結合小波分析與fft分析診斷汽輪發電機組的故障。通過對brocks和sin兩信號的分析，得出：對blocks信號進行分析一般採用軟閾值；分解層數對消噪結果影響的規律為用小波自動降噪在分解層數小於3時，隨著分解層數的增加，消噪結果變好，反之，則變差，用小波包降噪時隨著分解層數的增加，消噪效果變好；適宜選用dbl小波軟rigrsure閾值自動消噪。 -
Study on beam halo - chaos controlled by wavelet function
混沌的小波函數控制研究 -
Wavelet analysis and neural network have been researched. based on bp neural network, analysing the features of the bp neural network ' s activation function and the structure of the bp neural network, wavelets neural network is constructed with wavelet function. fourier transform has a important role on signal processing, so the fourier transform is introduced. a function ' fourier transform is analysed. after introducing the concept of the wavelet analysis, a serval wavelet functions is given out, so the knowledge of wavelet analysis is better understood. the multiresolution analysis has a important role on constructing wavelet function and understanding the wavelet transform
小波分析和神經網路得到了廣泛的研究，小波神經網路是在bp神經網路的基礎上，考慮和分析了bp神經網路的激勵函數的特點，以及bp神經網路的結構，結合了小波分析的知識而構造的。傅里葉變換在信號的處理起重要的作用，所以介紹了傅里葉變換、離散傅里葉變換和加窗傅里葉變換，並對一函數作離散傅里葉變換分析。 -
This paper combines theory of wavelet analysis with conventional neural network. substituting wavelet function for sigmoid function in neural network, to form wavelet neural network
本文將小波分析理論與傳統神經網路理論相結合，用小波函數代替傳統神經網路中的sigmoid函數，構成小波神經網路。 -
By integrating conventional fourie transformation with the smooth average method of spectrum, the high frequency noise was not only removed, but also the signal was smoothed and the main frequency of the signal was found easily and then was extracted as the coarse features of the signal. on the basis, in order to analyze the detail features of the signal, the signal can be decomposed using the db6 mother wavelet function
在譜分析方法的傅立葉變換中引入平滑平均法對蜂窩結構材料和纖維增強材料聲-超聲檢測信號進行處理，不僅可以有效地去除信號的高頻噪聲，而且可以平滑信號，突出檢測信號的主頻，實現了對檢測信號「粗信息」特徵的提取；在此基礎上，合理選用db6小波基函數，對信號進行小波分解，對信號的特徵進行進一步的細微分析。 -
The dissertation described the theory of wavelet in detail and presented the method of building wavelet function, presented the learning method and adjusting factor law of bp wavelet neural - networks, designed neural - networks controller. the result of simulation showed the controller could compensate dynamic inverse error
針對動態逆產生的逆誤差，本文對基於bp小波神經網路進行了研究，給出了學習演算法和權值調整律，設計了神經網路控制器並進行了模擬，模擬結果表明能夠較好的補償動態逆產生的誤差。 -
To choose wavelet function based on time - frequency region is put forward, time - frequency region composing of all of these wavelet functions can overlay wholly time - frequency region of non - linear function to approximate
本文提出了根據逼近函數的時頻空間區域來選擇小波基函數，使這些小波基函數共同構成的時頻空間區域覆蓋完逼近函數的時頻空間區域。 -
Generally speaking, the regularity of orthonormal wavelet bases with compact support increases linearly with the support width. but if we relax the orthogonality, much more freedom on the choice of wavelet function is gained
一般來說，對于規范正交小波基，它的正則性階數是隨其支集寬度線性增長的，而如果放鬆了正交性要求后，母小波可以同時具備局部支撐性和無限光滑性。 -
In this paper, it is expounded the relationship of two - channel perfect reconstruction filter banks to wavelet transform on the base of signal processing and engineering application ; avoiding complex path formula deduction, the selection of a desirable mother wavelet function becomes the design of two - channel perfect reconstruction filter banks
摘要從信號處理和工程應用的角度出發，避開了復雜的數學公式推導，闡述了雙通道濾波?組與小波變換的關系，並討論了母小波函數的選擇可歸結為正交鏡像濾波器的設計。 -
The compact support wavelet which is real and orthogonal isdivided into two parts : symmetrical part and anti - symmetrical one. it proves that both the two parts are still made into compact orthogonal wavelet base which are symmetrical and anti - symmetrical respectively. it proves that symmetrical part and anti - symmetrical one of scale function are scale function and wavelet function in some subspace respectively
本文提出一種新的對稱化方法，把一大類緊支集實值的非對稱正交小波函數分解成對稱和反對稱兩部分，並證明了其相應的兩部分仍然構成對稱和反對稱的緊支正交小波基，而且我們發現尺度函數對稱和反對稱部分分別是某子空間的尺度函數和小波函數。 -
First we collect signals by shake and infrared temperature sensor, transfer them to computer by a / d instrument, dispel zero excursion of sensor and in - linearity of a / d transformation, save them in the form of data file. then transfer them to matlab, analyze and dispose by wavelet function and toolbox. by lot of experiments and data analysis we find distinct change of the character in different fault states
然後，我們在現場對砂光機進行實驗，利用振動及紅外線溫度傳感器現場實時採集信號，通過a / d采樣卡送入計算機中，採用逆向建模的新方法來消除傳感器零漂及a / d轉換的非線性，再以數據文件形式保存，然後在matlab中調用數據文件，應用小波函數及工具箱對其進行處理分析，經過大量的實驗及數據分析發現在不同的故障狀態下，特徵量有明顯變化。 -
Some issues associated with the algorithm such as wavelet function selection, analysis level, and boundary treatment and so forth have been discussed. the stein self - adapting threshold denoising method is used to the signal pretreatment, thus the snr and resolution are improved
採用基於stein無偏似然估計自適應閾值選擇原理的實用消噪方法對故障信號進行預處理，在改善信噪比的同時，又提高了對突變信息的解析度。 -
So, in this section, a double - passage 4f wavelet filtering optical system is put forward, combining with the visual computation theory. the dog wavelet function is selected in the filter system, and the output images are just the expected, hi this part, an optical - electrical mixed system model is also mentioned, which has the advantages both in optical processing and digital processing system, such as real - time > intelligence
因此，文章在這一部分提出了一個雙通道4f小波濾波光學系統，並結合視覺計算理論，選擇了適合的小波母函數? ? dog函數製成濾被模片，對輸入圖像進行了不同尺度下的信息提取，得到了期望的輸出。 -
Wavelet transformation technology is applied to the small - current sensor, and the constructed pulse - respone function of the surface - acoustic - wave transducer is comsidered as a wavelet function, thus the surface - acoustic - wave type of element for wavelet - transformation and reconstruction is manufactured to filter the jamming signal of the small - current sensor effectively
把小波變換技術應用到小電流感測器中，構造的聲表面波換能器脈沖回應函數等於小波函數，從而製造出了聲表面波式小波變換及重構器件，該器件可有效濾除小電流感測器的干擾信號。 -
Firstly, the voltage sample signals from ac exciter stator coil were de - noised and filtered by means of decomposition of the wavelet function. secondly, the character frequency region of the rotating rectifier fault was selected clearly with wavelet package decomposition and reconstruction
先對交流勵磁機定子磁極線圈電壓采樣信號進行消噪濾波，再通過小波包分解和重構進行特徵頻率提取，建立了表徵旋轉整流器故障的特徵向量。 -
Paper [ 72 ] goes further in finding more effctive nonlinear function and wavelet function was selected to construct the controller. under the controller g the halo intensity was decreased to zero, the result is quite good
文獻[ 72 ]在選取更有效的非線性函數上作了進一步的探索並且取得了進展。該文選取小波函數構造控制器將束暈強度控制到零，達到較好的控制結果。 -
Hi designing the edge detection algorithm, the multi - scales character of the wavelet change and the character of the b - spline function as a best smoothing filter are combined. based on the scheme of local modulus maxima, a b - spline wavelet function is designed to detect the edge points
在邊緣檢測演算法中，我們結合了子波分析的多尺度特性和b -樣條函數最優平滑濾波器的特性，採用模極大值和b -樣條子波進行邊緣檢測。 -
Then we propose a kind of differential circuit implemented by the instantaneous companding technique and we analyze its principle and execute circuit ’ s simulation. and we realize a kind of wavelet function with the differential circuit
在此基礎上我們提出了一種對數域微分電路，對其工作原理進行了詳細的分析和電路模擬，並利用該電路實現了一種小波函數。 -
Based on the broad applications of wavelet theory in failure diagnosis, the daubechies wavelet function is employed in this system. this proposed analysis method is about to replace the traditional method with experienced operators in detecting the quality of final drive
根據對這兩部分信號的分析可以判斷主減速器是否有故障存在，並可進一步根據細節分解信號的周期等特性來推斷可能產生故障的部位。 -
When a smoothing function ' s first derivative is adopted as wavelet function, the local maxima of wavelet transform modulus detect the location of signal ' s singularities, in this thesis, these characters are not only applied to measure the magnitude of dead angles of the dissymmetry inrush but also the symmetry inrush in three - phase transformer
當小波函數取光滑函數的一階導數時，信號小波變換的模在信號突變點將取得局部極大值。本文利用這些性質不僅對三相變壓器的非對稱性涌流間斷角的大小進行測量，同時還測量了對稱性涌流的間斷角，測量精度有一定的改善。
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