fast fourier transform (fft)造句
例句與造句
- In addition , the emphasis of the thesis is the use of fast fourier transform ( fft ) in reactive power compensation
研究的另一個重點是快速傅立葉變換在無功補償中的應用。 - In addition , based on fast fourier transform ( fft ) , an effective and reliable carrier frequency detection method has also been designed in this thesis
此外，論文還設計了一種有效可靠的基于fft的載波頻率測量方法。 - 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
軟件算法方面，系統(tǒng)采用傳統(tǒng)的快速付立葉變換( fft ) ，對采集的電壓和電流信號進行頻譜分析。 - But the computing amount of dft is so large that its practical use is restricted , especially real - time processing . in fact , we use fast fourier transform ( fft ) in practical engineering
但龐大的運算量使得dft的實際應用，特別是實時處理難以實現(xiàn)，所以實際工程中用到的都是快速傅里葉變換( fft ) 。 - Related techniques and their applications are briefly reviewed in this paper , the conventional cross - correlation algorithm and the cross - correlation algorithm based on fast fourier transform ( fft ) are discussed
本文簡要地回顧了piv技術的一些典型算法和應用，研究了基本互相關算法和基于快速傅立葉變換的互相關算法。 - It's difficult to find fast fourier transform (fft) in a sentence. 用fast fourier transform (fft)造句挺難的
- In chapter 3 , the paper presents the theory of wigner - ville distribution ( wvd ) , pseudo wvd , smoothed pseudo wvd , discrete fourier transform ( dft ) , fast fourier transforms ( fft ) , and also expatiates on the
第三章將對wvd 、 pwvd 、 spwvd分布、 dft和fft變換的理論進行說明,并闡述跳頻解跳與數(shù)字中頻接收機的解跳原理。 - 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(qū)分這兩類信號,并消除干擾。在此基礎上,在數(shù)字信號處理方面,本文提出了三種算法用于抑制上述干擾。 - This paper introduced the work principle for testing wood elastic modulus with fast fourier transform ( fft ) and the structures of the machine and test technical process , this machine can test fast and accurate
摘要介紹了快速傅立葉變換( fft )技術敲擊板材檢測彈性模量數(shù)控檢測設備的工作原理及組成，并在此基礎上描述了檢測板材的工藝過程，說明該檢測設備具有準確快速等特點。 - The time - domain scattering is computed via fdtd method , which is particularly well adapted to frequency - dependent soil . this method is processed prior to a fast fourier transform ( fft ) , which is performed to come back to the frequency domain
主要包括用于有耗土壤和樹干計算的頻率相關fdtd算法- ( fd ) ~ 2td ，以及吸收土壤凋落波的gpml吸收邊界，確立了樹干散射的時域算法模型。 - 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(zhì)區(qū)域使用直線法，導體所在區(qū)域使用有限差分法分別進行求解，充分發(fā)揮兩種方法各自的優(yōu)越性。由于在純介質(zhì)區(qū)域中使用了直線法求解，因此該算法具有計算時間與介質(zhì)層厚度無關的突出優(yōu)越性。 - 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(wěn)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。 - So power systems harmonic analysis is a significant aspect of power systems research . power system harmonic analysis was realized usually with fast fourier transform ( fft ) , but the method exits spectrum leakage , and can not analyse all harmonic parameters exactly , such as frequency , amplitude and phase , in particular has big phase error
電力系統(tǒng)諧波分析通常都是通過快速傅立葉變換( fft )實現(xiàn)的，但是這種方法存在柵欄效應和頻譜泄漏，使計算出的諧波參數(shù)即頻率、幅值和相位不準，尤其是相位誤差很大，無法滿足準確的諧波測量要求。 - It deduces the interpolation formula of simultaneous sampling datum calculated by the asimultaneous sampling datum and uses fast fourier transform ( fft ) technology to calculate harmonic parameters . in the end , it gives harmonic errors " datum and curves by means of math model and computer simulation
在此基礎上，導出了用非同步采樣數(shù)據(jù)計算同步采樣數(shù)據(jù)的插值公式，并根據(jù)復序列快速傅立葉變換（ fft ）原理對插值后的采樣數(shù)據(jù)進行分析和計算，從而得到電網(wǎng)諧波參數(shù)。 - In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal , wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station , in which the signal is decomposed into different frequency band , and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基于李家峽水電站雙排機組振動的現(xiàn)場試驗研究，并且針對傳統(tǒng)頻譜分析方法傅立葉變換( fft )對于非平穩(wěn)信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質(zhì)，通過對開停機這一典型非平穩(wěn)過程信號進行小波及小波包分析，將其分解到不同頻帶內(nèi)，獲取微弱信息和提取優(yōu)勢頻率，并對其作振源分析，得出開停機初始時刻因水流不穩(wěn)均出現(xiàn)強烈的振動現(xiàn)象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。 - At first , the thesis discusses the hardware implementing arithmetic of fast fourier transform ( fft ) and some correlative problems need to be solved . and according to the thesis " design demand and characteristic of large - scale programmable logic device ( pld ) , the thesis designs an implementing scheme of fft processing machine based on pld
首先，論文研究了快速傅立葉變換( fft )的硬件實現(xiàn)方法以及有限字長效應等問題，并根據(jù)論文的設計要求和大規(guī)模可編程邏輯器件的特點，設計了一個基于可編程邏輯器件的fft處理機實現(xiàn)方案。
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