fourier transform 中文意思是什麼

fourier transform 解釋
傅里葉變換
  • fourier : n 1 傅立葉〈姓氏〉。2 Francois Marie Charles Fourier 弗朗瓦斯馬利沙利傅立葉〈1772 1837，法國空想...
  • transform : vt （使）變形；（使）變化[轉化，轉變]；變態，改變（性質、機能等），改造，改革；【數學】變換；【電...
  1. Through the detailed analysis of the aaf, the defection of using chirp - fourier transform in guidance radar signal processing is pointed out

    通過對加速度模糊函數的形態分析也指明了針對線性調頻信號的二次相位匹配處理（ chirp - fourier變換）在應用到制導雷達信號處理中所存在的缺陷。
  2. The fractional fourier transform is linear time - frequency transform, and it doesn ’ t have disadvantages of wigner - ville distribution. moreover, the precision of this method is higher, and the performance of antinoise is better

    而分數階傅立葉變換是線性時頻變換，所以它不受交叉項的干擾，沒有不模糊區間減半的缺點，而且它的估計精度高、抗噪性能好。
  3. Sequentially, the author discussed the technologies of medical image 3d visualization according to the clinical applications. with the development of computer, 3d visualization and computer graphics, the 3d visualization of medical images has progressed from fourier transform and convolve inverse projection to mpr ( multi - planar reformation, mpr ) and mtp ( maximum intensity projection, mtp ), nowadays, the real 3d reconstruction method, surface and volume rendering has risen. the image registering, image segmentation, pixel data set construction and 3d special interpolation are the key technologies in medical images 3d reconstruction

    隨著計算機技術、三維可視化理論和計算機圖形學的發展，醫學圖像的三維可視化技術也從傅立葉變換、卷積反投影等基本圖像處理演算法，發展到真正的三維重建演算法：面繪制和體繪制；醫學圖像的三維可視化技術的應用也從三維醫學成像發展到虛擬內窺鏡，以及今天的虛擬可視化人體研究；而圖像的配準、圖像分割、體數據集的構建、三維空間插值則是醫學圖像三維可視化實現過程中的關鍵技術環節。
  4. Resolution to kernel function with dissociable variables based on fourier transform

    基於快速傅立葉變換的二階可靠度分析方法
  5. The fourier transform is an integral expression for a fourier series applied to an infinitely long signal.

    傅里葉變換式是對博里葉級數的一種積分表達式。
  6. Palmprint recognition based on fourier transform

    基於傅立葉變換的掌紋識別方法英文
  7. Sifting out kernel functions using fourier transform

    利用傅立葉變換篩選核函數的方法
  8. Aapproximation of fourier inverse integral using fourier transform approximation for amplitude of harmonics in a finite fourier series summation

    富氏級數中之諧波成份以富氏轉換近似並以有限級數和近似富氏逆轉換。
  9. 2. a frequency extrapolation scheme is developed to effectively predict radar cross section using floating genetic algorithm based on the geometrical theory of diffraction ( gtd ) model. the threshold discrete fourier transform ( tdft ) is introduced for the data compression in angle domain

    在目標散射中心建模方面，我們將浮點型遺傳演算法（ fga ）應用於實際人工目標的gtd模型參數的抽取，利用所抽取的模型參數完成了雷達散射截面rcs的頻率擴展以及數據壓縮，並利用擴展的數據提高了距離解析度。
  10. Abstract : in fourier transform profilometry, because of the nonlinear relationship between the irradiant incident upon a ccd dete ctor andthe voltage it outputs, it will cause phase evaluation errors. here, we ex plain the errorsource by theoretical deducing, then make a simulation. at last, a method to decrease thiserror is put forward

    文摘:在傅里葉變換輪廓術中，由於ccd探測器光電響應的非線性，將在測量中引入高次項，從而對相位的求解造成較大誤差，通過理論的推導定性地解釋了誤差的來由，並用計算機進行了模擬計算，最後提出了減小誤差的方法。
  11. Rapid fourier transform nmr correlation spectroscopy

    快速傅立葉變換核磁共振相關波譜法
  12. Pulse fourier transform nmr spectroscope

    脈沖傅里葉變換核磁共振波譜儀
  13. The main information is followed. 1. a new kind of amino - carboxyl - chelating - agent ( acca ), 1, 2 - bis ( 4 - amino phenoxy ) ethane - n, n - n ', n ' - tetraacetic acid ( 4 - bapta ) was synthesized and characterized by fourier transform infrared spectroscopy, 1h - nuclear magnetic resonance and elements analysis, and its property was also studied

    設計併合成了一種新型的氨羧配位劑? ? 4 - bapta ，利用紅外、核茲共振、元素分析等手段對它的結構進行了表徵，並對它的性質進行了研究。
  14. Analysis on main nutritional components of powdered milks via fourier transform infrared spectroscopy

    奶粉主要營養成份的傅里葉變換紅外光譜法分析
  15. Components, structure and surface morphology of the resulted films were identified by fourier transform infrared ( ftir ) spectroscopy, x - ray diffraction ( xrd ) and scanning electronic microscopy ( sem ). the analyses showed the content of cubic boron nitride in the resultant films on substrates was rather high and crystal particles of c - bn with uniform size, smooth crystal plane and regular shapes ( quadrangle and hexagon ) densely arrayed on the substrate

    傅里葉轉換紅外吸收（ ftir ）光譜儀、 x射線衍射（ xrd ）儀和掃描電鏡（ stm ）的測量結果顯示，基底上的bn膜中立方相含量很高，且晶粒大小均勻、排列緻密，晶形呈規則的四角和六角形。
  16. We use fast fourier transform arithmetic to calculate two seriate images. this article discusses the basic principle of the cross - correlation arithmetic in detail, discuss each stage of its produce and development and also discuss the thinking, the merit and the defect of each algorithm. based on these discusses, we confirm our algorithm and realize it in programming with c + +

    粒子圖像的匹配演算法的主要運算是將兩連續的視頻圖像進行基於快速傅里葉變換的互相關運算，本文詳細論述了相關演算法的基本原理，它的產生和發展的各個階段，在比較了各種演算法的基礎上確立了自己的演算法並以c + +編程實現。
  17. 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。
  18. The subregion with pure dielectric layers is analyzed by mol and the fast fourier transform ( fft ) is introduced to reduce the computing time, while the subregion with conductors is analyzed by fdfd to take advantage fully the superiorities of these two methods

    通過在純介質區域使用直線法，導體所在區域使用有限差分法分別進行求解，充分發揮兩種方法各自的優越性。由於在純介質區域中使用了直線法求解，因此該演算法具有計算時間與介質層厚度無關的突出優越性。
  19. Because the method of structure vibration which based on syntony stimulation and blasting vibration is not a simple one, in order to decompose the syntony stimulation of blasting vibration, fourier transform of blasting vibration is introduced at first

    由於結構震動理論是以諧激勵為基礎的，而爆破震動並不是簡單的諧激勵，因而首先介紹爆破震動的傅氏變換理論，以便於分解爆破震動中的諧成份。
  20. At present, the typic harmful current detection methods are the fast fourier transform algorithm in frequency domain and methods based on the instantaneous reactive power theory, these methods all require some transform and quick, real - time calculating, so high precision analog multipliers or high speed dsp chip with fast a / d are needed, this results in complex circuit and high cost ， which have restricted the development of apf

    目前畸變電流檢測常用的方法有頻域法的fft和基於瞬時無功理論的畸變電流檢測法。這些方法均有一定的變換，需要快速、實時運算，因此必須使用高速的數字微處理器和高性能a / d轉換器，這必將大大提高系統成本，使得電路結構復雜，在一定程度上限制了有源濾波器的發展。
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