daubechies 中文意思是什麼
daubechies
解釋
多貝西-
Fast algorithms of both discrete and orthonormal wavelet and wavelet packet coefficient are diagrammatized to be introduced. daubechies wavelet is applied to help to discuss the application and test on signal filtering and noise reduction with the principle and threshold implementation ; the basic principle to pickup the fault characteristics is introduced mainly about the relations between the maximum module and signal saltation point and how to characterize the saltation point with lipschitz exponent
展示了離散正交小波變換的mallat快速演算法和小波包系數分解的快速演算法；重點應用daubeches小波探討了小波變換在信號濾波去噪中的應用和實驗，闡述了其基本原理和通過閾值化處理實現濾波的具體方法；探討了用小波變換進行故障特徵提取的原理，說明了小波變換模極大值和信號突變點之間的關系以及怎樣用李氏指數來表徵突變點的性質。 -
One is the non - orthogonal gabor - daubechies frame, or g - d frame, a complete set of discrete window fourier functions which are constructed by space - shifting and harmonically modulating a gaussian window. although a g - d frame is not an orthogonal basis, it bears considerable advantages for the study of physical problems, especially those related to the wave field extrapolation, due to the optimal localization properties of the gaussian window function under the heisenberg uncertainty principle
其一為將高斯窗函數經平移和調制而構成的一組窗口富里葉框架（ gabor - daubechies框架，或g - d框架）基本函數，另一種為在富里葉分析和小波包理論基礎上發展起來的局部餘弦基函數。 -
At first, this thesis gives right calculation results of derivative of daubechies scaling function, the determine fashion of continuity is rendered
本論文首先推導了daubechies尺度函數導數或高階導數的正確計算結果，給出了它的連續性的判定方式。 -
In guarding the continuity of derivative and not increasing supported assemble, this paper uses convolution of daubechies and b - spline scale functions to improve original method
在保證導數的連續性和不增加支集長度的前提下，採用daubechies尺度函數與b ?樣條尺度函數的卷積對原方法進行了改進。 -
In solving differential equations, we must increase supported assemble length since the continuity of daubechies wavelet derivative increases as supported assemble increase, that results in calculation complexly
由於daubechies小波本身導數的連續性隨著支集的增加而增大，解高階微分方程時，就必須增加支集的長度，這會使計算復雜化。 -
And a simulation result also is shown. so, the four daubechies wavelet base is chosen to decompose images
最後通過模擬結果數據選擇了daubechies4階小波基對圖象進行四級分解。 -
3. based on the low - pass filter coefficients of daubechies 4 wavelet, we present another multiscale recursive data fusion estimation algorithm
3 .基於daubechies4小波的低通濾波系數，發展了一種新的多尺度數據融合估計演算法 -
The construction of daubechies orthogonal wavelet on the interval [ 0, 1 ] was analyzed. and the biorthogonal wavelet on the interval [ 0, 1 ] was constructed similarly
分析了daubechies區間正交小波的構造，用類似的方法構造了[ 0 ， 1 ]上的雙正交小波基。 -
The wavelet transform has been altered to the wavelet transform that maps integer to integer with lifting theory by daubechies. we apply this theory to fft and dct
根據daubechies採用提升的方法對小波變換進行改造使之成為從整數到整數的變換思想，把提升理論運用在fft 、 dct的快速演算法中。 -
The wavelet transform is a new style mathematic analysis tool. it is a new theory system developed from the studies of y. meyer, s. mallat and i. daubechies in 1980s
小波分析是一類新型的數學分析工具，是二十世紀八十年代以來在y . meyer ， s . mallat和i . daubechies等人的研究的基礎上發展起來的新的理論體系。 -
Finally, a factual image compression method based on wavelet transform is offered. the main work is listed as follows : 1 ) in this part, the orthogonal daubechies wavelet bases from 1 to 4 are analyzed
本文所作主要工作具體如下： 1 ）按照小波基的選取原則，通過對性能優良的daubechies的1到4階正交小波基的驗證，得到了實際的模擬結果數據。 -
According to the characteristic of the wavelet analysis, a feasibility study is carried out on the basis of using the wavelet transform to process the actual collected signals with daubechies wavelet, and the ae signals are divided
根據小波分析的特點，本文對小波變換用於實際信號處理進行了可行性研究，選擇debauchies小波對採集的數據信號進行小波變換，提取聲發射信號。 -
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。 -
The response and excitation signals are first decomposedusing the daubechies wavelet scaling function. then the differential vibrationequations of the time - varying system are transformed into simple linear equationsbased on the orthogonality of the scaling functions. the physical parameters can beidentified directly by solving the linear equations
運用daubechies小波對線性時變系統的激勵和該激勵作用下的響應做變換，將變換后的響應和激勵代入微分方程，利用daubechies小波尺度函數的正交性，將微分方程轉換成簡單的代數方程組，求解方程組，識別系統的時變參數。 -
They have a number of desirable properties not possessed by wavelets of daubechies type, namely : they have symmetry property ; the scaling function and physical space representation are identical ; expansion coefficients are easily computed ; in certain respects they are more accurate ; the functions ( but not their derivatives ) can be computed without solving an eigenproblem. the price to be paid for these advantages is the loss of orthogonality, interpolating wavelets are only biorthogonal
本文主要的研究成果是把一維的某些結論推廣到高維，分為以下四個方面： （ 1 ）使用二元拉格朗日插值法構造二元尺度函數和小波函數，使其具有緊支性、對稱性以及函數展開式的系數易於計算等優點。唯一的缺陷是缺乏正交性。 -
The main idea makes use of daubechies orthonormal bases to transform the differential equations into linear equations in wavelet space, and then solve the set of simultaneous equations to get the solution, transform the solution back into physical space to identify the moving loads or the prestressing force. numerical simulations demonstrate the efficiency of the method using selected measurements
該方法的思路是先對車橋系統進行有限元建模，再利用小波基將動力學方程導入小波空間，求解關于響應與載荷的小波系數的線性方程組得到載荷小波系數，重新導入到物理空間求得所需識別移動載荷。 -
Based on lifting scheme and cohen - daubechies - feauveau theorem constructing biorthogonal wavelets, we construct a new symmetric biorthogonal 9 7 tap wavelet ( ls97 ). the compression performance of the ls97 wavelet is almost the same as that of cdf 9 7 wavelet, which is adopted by jpeg2000. furthermore, the inverse of ls97 wavelet can be replaced by cdf 9 7 wavelet in image compression, and vice versa
以構造雙正交小波的cohen - daubechies ? feauveau定理為基礎，利用提升方法設計了一組對稱雙正交9 / 7小波濾波器，它與jpeg2000中採用的cdf9 / 7小波壓縮性能幾乎相同，並且它們兩者在圖像壓縮中可以互相做正變換與逆變換。 -
The wavelet filters adopted in the progress are the conjugate quadrature filter bank ( cqf ) and the daubechies ( daub ) based filter. analysis and comparison of the results are made when different wavelet filters work
同時對不同頻段信號的分離採用不同的小波濾波器? ?共軛正交濾波器（ cqf ）與daubechies （ daub ）小波濾波器的濾波效果進行了比較和分析。
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