fast fourier transform algorithm 中文意思是什麼

fast fourier transform algorithm 解釋
快速傅里葉變換演算法
  • fast : adj 1 緊 （opp loose）， 牢實的，堅牢的，粘得緊的，堅固的；固定的。2 忠實的，可靠的。3 耐久的；不...
  • 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...
  • algorithm : n. 【數學】演算法；規則系統；演段。
  1. 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。
  2. 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。
  3. In order to investigate the unsteady flow frequency domain performances of an axial flow compressor at different mass flow, rotating speed and blade row spacing, plus inlet flow distortion, and considering aerodynamic characteristics and stability of the compressor, the low speed research compressor ( lsc ) at college of energy and power in nuaa is used to carry out the experiment studies. a large amount of test data has been gained through dynamic pressure transducers embedded in the stator blades at the tip, middle and hub section, then fast fourier transform algorithm ( fft ) is applied to calculate the frequency data

    為探討軸流壓氣機在工作流量、工作轉速及動?靜葉排軸向間距變化時的葉片排流場非定常頻譜特性變化規律，並耦合進氣畸變的影響，同時與壓氣機氣動性能和氣動穩定性相關聯，作者利用南京航空航天大學能源與動力學院的低速大尺寸軸流壓氣機（ lsc ）試驗器，採取在靜子葉片表面埋入動態壓力傳感器的實驗方法，對葉尖、葉中和葉根三個截面的動態壓力進行了測量，獲得了大量的可靠的實驗數據。
  4. In this paper, we firstly design orientation filters based on directional image of fingerprint and employ them to denoise gray - scale image. then, we binarize the gray - scale image with local self - adaptive binarization smoothness algorithm and eliminate the noises from the binary image with fast fourier transform algorithm

    本文先基於指紋的方向圖設計出方向濾波器對原圖像進行濾波去噪，然後使用局部平滑閾值自適應二值化演算法，將灰度圖像進行二值化，並採用快速傅氏變換對所得到的二值化圖像進行去噪處理。
  5. The digitizer based on pxi bus uses fpga ( field programmable gate array ) to implement 256 points, radix - 2 dit fft ( fast fourier transform algorithm ). the design uses pipelining for fft processing and can accomplish sampling and processing signals of two channels at the same time. in the signal acquisition circuit, - a / d convector is used to enhance the precision of the signal sampling

    在本設計中，採用fpga （ fieldprogrammablegatearray ）實現了256點基2dit演算法復數fft （ fastfouriertransformalgorithm快速傅氏變換演算法）處理器，具有較高的速度和運算精度fft ，設計採用流水線處理方式大大的提高了處理速度，可實現對兩個通道輸入信號的并行採集與處理。
  6. A fast fourier transform algorithm to estimate carrier frequency deviation

    快速傅里葉變換載波頻偏估計演算法
  7. Three methods of digital signal processing algorithm are proposed to restrain the noise discussed, there are methods of fast fourier transform ( fft ), of moving self - correlation, and of least means

    這樣，就可以在周期性和相關性上，區分這兩類信號，並消除干擾。在此基礎上，在數字信號處理方面，本文提出了三種演算法用於抑制上述干擾。
  8. Among the different imaging algorithms, the range - doppler fft ( r - d fft ) algorithm, based on range - doppler theory, in which the fast fourier transform ( fft ) is employed to reduce compute burden, is widely used in various imaging radar because it can be easily realized in real - time application

    陸基成像雷達（ gbr ）作為isar成像技術的重要應用，其觀測目標具有速度快，慣性大，運動相對平穩等特點，針對這些特點，本文對isar成像運動補償方面作了較為深入的研究。
  9. The traditional beam propagation algorithm based on fast fourier transform fails to give right results due to the limitation of the sampling theorem

    由於取樣定理的限制，常規的基於快速傅里葉變換（ fft ）光束傳輸模擬演算法不能進行任意焦距聚焦光束的傳輸過程的模擬。
  10. Choose the proper sample and compare by two means. first is to compare actual value to the calculated, and second is analysis of the effect on harmonic wave. take fast fourier transform algorithm to the samples fore - and - aft integral, and compare the amplitude and angle

    首先是直接比較實際值與還原值，其次是分析各種演算法對諧波的影響：分別對積分前後的采樣值進行快速傅立葉變換，比較各次諧波幅值和相位的變化。
  11. Parallel fast fourier transform algorithm based on binary fat tree network

    一種基於二叉胖樹模型的并行fft演算法
  12. The binary fat tree is a network topology which is prone to accomplish butterfly computing. according to this feature, a logical model for binary fat tree was constructed at first, and then a parallel fast fourier transform algorithm based on it was devel.

    二叉胖樹網路結構是一種易於實現蝶式計算的網路拓撲結構，基於這一特點，首先構造了一種二叉胖樹的邏輯模型，並提出了一種基於該模型的并行快速傅立葉變換演算法。
  13. In the course of the design, critical technologies are applied, such as digital phase - locked loop, fast fourier transform algorithm, universal asynchronous receiver & transmitter, and so on. in the project, as a important component, the module of monitoring the buses " power quality takes a long time

    在設計過程中，使用的關鍵技術有：使用cpld模擬多路sspc多種狀態；在對匯流條電能質量的監測過程中採用頻率跟蹤技術? ?全數字鎖相環；應用fpga技術使用fft運算進行諧波分析；通用異步收發器等技術。
  14. It involves not only the detection of signal frequency, signal phase and power factor but also calculation and control of phase. the method of calculating phase is based on fast fourier transform algorithm ( fft ). it is used to calculate signal frequency, signal phase, power factor and the phase on / off time according to sampling instantaneous value of voltage and current

    本文主要提出了採用信號處理技術（快速傅里葉變換fft ） ，根據電壓、電流采樣的瞬時值，計算信號頻率、信號相位、功率因數、分合閘相角的選相控制方法，並介紹了最終控制分合閘的原理與實現方法
  15. In order to eliminate the transient current and ensure the test precision, this paper introduces the principle and the method of phase selection of the ac based on fft ( fast fourier transform algorithm )

    為了消除暫態電流，本文闡述了一種基於快速傅立葉變換（ fft ）的交流選相合閘技術的原理以及實現方法，保證了檢測精度。
  16. The major work implemented in this paper is presented as follows : ( 1 ) an improved discrete fast polar fourier transform algorithm ( called dpft for short ) is proposed which fast and effectively computes the 2d discrete fourier transform in polar coordinate systems

    論文的工作主要包括：一、提出一種改進的離散極坐標付立葉變換（ dpft ）的快速演算法，並在此基礎上，提出一種基於dpft的紋理分類演算法。
  17. This algorithm uses improved euclidean distance as similar measurement, and then evaluates the similar distance between steam time series and feature time series in a batch mode using fast fourier transform

    該演算法利用改進的歐氏距離作為模式的相似度量方式，然後利用快速傅立葉變換，實現動態序列與各指定模式的批處理相似性計算。
  18. The concepts of filtering and sampling power system voltage and current signals for harmonic analysis using the fast fourier transform ( fft ) algorithm by a digital signal processor are introduced

    軟體演算法方面，系統採用傳統的快速付立葉變換（ fft ） ，對採集的電壓和電流信號進行頻譜分析。
  19. The fast fourier transform algorithm for the solution of the level - 2 - ciculant linear systems of type

    循環線性系統求解的快速傅里葉演算法
  20. It is stressed in this paper the analysis methods used in vibration faults of average power spectrum and cepstrum, based on the fast fourier transform algorithm, and development of the vibration signal analysis system in test - driving of wj6 engine, involved the technic of software or hardware

    文章重點給出基於fft技術的功率譜和倒頻譜分析方法、振動信號分析系統的設計和實現，討論了相應軟體開發中所涉及的技術問題。
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