FFT

美 　英

• n.快速傅氏變換
• 網(wǎng)絡(luò)快速傅里葉變換(Fast Fourier Transform)；快速傅立葉變換；快速傅立葉轉(zhuǎn)換

英漢解釋

n.

1. 快速傅氏變換

例句

Moreover, the hardware requirement is simpler and it is possible to run with a dual-channel FFT analyser only.

硬件配置也較簡(jiǎn)單，甚至可以只用雙通道FFT分析儀來(lái)實(shí)現(xiàn)。

According to the articles published, the harmonic analysis of electronic power system is usually achieved via Fast Fourier Transform(FFT).

從國(guó)內(nèi)外發(fā)表的文獻(xiàn)來(lái)看，電力系統(tǒng)的諧波分析，通常都是采用快速傅立葉變換（FFT）實(shí)現(xiàn)的。

This equation is adapted to any shape's input beam and can be easily realized using fft arithmetic.

該方程對(duì)任意分布形式的輸入光束具有普適性、并便于利用快速傅立葉變換算法實(shí)現(xiàn)。

A diagnosis and signal analysis method with FFT signal processer is provided for on surge-detonation of a twin-spool turbojet engine.

本文著重介紹某雙軸發(fā)動(dòng)機(jī)喘振—爆燃故障用FFT信號(hào)處理機(jī)進(jìn)行診斷和信號(hào)分析的方法。

Finite-frequency tomography(FFT) is a new method to invert deep structure of the earth in the age of broadband seismic observation.

有限頻率層析成像是在寬頻帶地震觀測(cè)時(shí)代提出的反演地球深部結(jié)構(gòu)的新方法。

At the same ti me, a corresponding fast computing algorithm is deduced by using FFT and CZT algorithm.

同時(shí)，利用FFT及CZT算法，進(jìn)一步推導(dǎo)出尺度變換矩陣的一種快速實(shí)現(xiàn)算法。

In this paper, it briefly discusses the FFT and its application in the case of phone-video.

簡(jiǎn)單介紹了FFT變換及其在電話視頻中的作用。

A new thought of combining frequency estimate method based on FFT with that based on multiple signal classification (MUSIC) is presented.

提出了將基于FFT的頻率估計(jì)法和基于多重信號(hào)分類（MUSIC）的頻率估計(jì)法相結(jié)合的新思路。

This FFT method is compared with other traditional fitting methods by computer emulation for an erbium-doped fiber sensing system.

以摻鉺光纖為例，通過(guò)數(shù)字仿真將本方法與其它幾種傳統(tǒng)的擬合方法進(jìn)行了比較。

The optimal filter coefficients are calculated in the frequency domain by FFT and are derived from an eigenvector of a matrix.

最佳均衡器的系數(shù)通過(guò)快速傅立葉變換在頻域進(jìn)行計(jì)算，并可通過(guò)求取矩陣的特征向量來(lái)獲得。

This paper presents the application of the MSP430-based FFT algorithm with variable sampling points to a vortex flowmeter system.

介紹了一種基于MSP430單片機(jī)和變采樣點(diǎn)數(shù)的FFT算法在渦街流量計(jì)中的應(yīng)用。

Light propagation is described by paraxial wave equations and solved by a phase-screen method combined with the FFT technique.

光在流場(chǎng)中的傳輸采用傍軸近似光波傳輸方程描述，用相屏法和快速傅里葉變換（FFT）技術(shù)求解。

Step One: Select a WAV file as the target of analysis. (Ding. wav) Step Three: Transform and painting to FFT frequency domain graphics.

步驟一：選擇一個(gè)WAV文件作為分析的對(duì)象。（ding.wav）步驟三：進(jìn)行FFT變換并畫頻域圖形。

This algorithm takes good advantage of human audio system and embeds watermark into the phase of audio signal after FFT.

該算法充分利用人耳聽覺(jué)系統(tǒng)特性，把水印信號(hào)嵌入到音頻信號(hào)快速傅立葉變換后的相位系數(shù)上。

the exact upper bound and lower bound of mean square error are obtained for the two FFT algorithms of fixed point and block floating point.

得到了準(zhǔn)確的定點(diǎn)和塊浮點(diǎn)兩種FFT算法的均方誤差上下限。

Considering real-timing of algorithm, FFT is used for estimation of signal spectrum, and the specific steps are expressed.

考慮到算法的實(shí)時(shí)性，信號(hào)譜估計(jì)的算法完全基于FFT快速變換，并且給出了算法的具體實(shí)現(xiàn)步驟。

The traditional method of spectrum analysis on the current signal via FFT is hard to diagnose the fault of the broken rotor bars.

傳統(tǒng)的通過(guò)FFT變換對(duì)電機(jī)定子電流信號(hào)直接進(jìn)行頻譜分析，難以有效識(shí)別出轉(zhuǎn)子斷條故障。

Sampling data using fast Fourier transform (FFT) to numerical algorithm has obtained the high accuracy air shaft synthesis parameter survey.

對(duì)采樣后的數(shù)據(jù)運(yùn)用快速傅立葉變換（FFT）進(jìn)行數(shù)值計(jì)算，獲得了高精度的風(fēng)井綜合參數(shù)的測(cè)量。

Algorithms are presented for maximally efficient computation of the crystallographic fast Fourier transform (FFT).

算法提出了最大限度地有效計(jì)算晶體快速傅里葉變換（FFT）。

At last the FP operation modules are used to design FP FFT processor, achieve high precision of FFT processing on FPGA.

最后應(yīng)用浮點(diǎn)運(yùn)算模塊設(shè)計(jì)浮點(diǎn)FFT處理器，在FPGA中實(shí)現(xiàn)高精度的FFT處理。

The software makes FFT for the acquired data. The running status of the unit is shown at real time with graphs and data.

軟件對(duì)采集來(lái)的信號(hào)進(jìn)行傅立葉變換，最終以圖形、數(shù)據(jù)的形式實(shí)時(shí)顯示機(jī)組運(yùn)行狀態(tài)。

Algorithms for evaluation of the crystallographic FFT for centred lattices are presented.

算法的評(píng)價(jià)晶體的FFT為中心的晶格介紹。

Present a improved block floating point algorithm which solves the overflow in long point FFT effectively and improves precision.

采用了一種改進(jìn)的塊浮點(diǎn)算法，有效避免了溢出問(wèn)題并且提高了精度。

Time-frequency order tracking method overcomes the shortcomings of traditional resampling and FFT methods.

克服了采用傳統(tǒng)等角度重采樣后進(jìn)行傅立葉變換方法不能在時(shí)域內(nèi)提取階比信號(hào)的不足。

A multi-dimensional vector radix Fast Fourier Transform (FFT) algorithm with Decimation In Frequency (DIF) was proposed.

給出了頻域抽取（DIF）多維向量基快速傅里葉變換（FFT）算法。

In this paper, application of FIR filter and FFT processing technology in radar digital signal processing system is introduced.

介紹了數(shù)字信號(hào)處理FIR濾波器和FFT處理技術(shù)在地面偵察雷達(dá)中的應(yīng)用。

Through running FFT on FPGA, it is proved that the technology can effectively reduce the memory accessing's delay, economize memory width.

在FPGA設(shè)計(jì)環(huán)境中模擬運(yùn)行了FFT核心循環(huán)，實(shí)驗(yàn)表明該技術(shù)可以有效降低帶寬需求，減少網(wǎng)絡(luò)沖突。

using window law and adjusting method to reduce the error of FFT, the results have been markedly improved.

采用加窗法和幅值比值校正法對(duì)FFT進(jìn)行減小誤差處理，經(jīng)過(guò)處理效果明顯提高。

Fabio Capello told FFT that he'd told you to "stay in front of the goal" .

法比奧?卡佩羅在接受FFT采訪時(shí)說(shuō)道，他曾讓你“一直站在球門前面”。

The continuous-wave echo data should be separated time equally and output by fast Fourier transformation(FFT) before the operation.

在算法進(jìn)行之前，必須對(duì)連續(xù)波回波數(shù)據(jù)進(jìn)行等時(shí)段截取，并通過(guò)FFT變換輸出。

The algorithm of interpolation of hanning windows FFT reduce the spectral leakage error and the interference between harmonics.

加窗插值FFT算法減小了頻譜泄漏誤差和降低了諧波之間的相互干擾的影響。

The parameter estimation error of Continuous Zoom Analysis Fourier Transform of FFT and FT spectrum is studied is studied in this paper.

本文研究了用FFT+FT連續(xù)細(xì)化分析傅立葉變換法進(jìn)行離散頻譜校正時(shí)的參數(shù)估計(jì)誤差。

It was shown from the experimental results that FFT with SVM can achieve better results in the study of short-time sleep stages.

實(shí)驗(yàn)結(jié)果表明：FFT結(jié)合支持向量機(jī)（SVM）在短時(shí)睡眠階段的研究中能夠得到較好的分期結(jié)果。

As to steady state phenomena, the traditional signal analysis tool FFT is used for harmonic analysis and flicker.

并利用快速傅立葉變換方法對(duì)諧波、閃變和純正弦波等穩(wěn)態(tài)現(xiàn)象進(jìn)行分析。

One intervention strategy that has shown promise in adults with bipolar disorder is family-focused therapy (FFT).

一項(xiàng)初見成效的干預(yù)策略是家庭取向治療（FFT）在成人雙相患者中的應(yīng)用。

So the paper presents a scale-FFT magnitude method to separate integer and non-integer harmonics combining FFT with CWT.

文中結(jié)合傅里葉變換和CWT的特點(diǎn)，提出了利用小波變換系數(shù)傅里葉變換的幅值來(lái)分離諧波的算法。

FFT divides the raw data into thin narrow-band slices, which it then recombines with other portions along a timeline.

FFT將原始數(shù)據(jù)分成很多窄頻帶的薄片，然后將很多這樣的薄片按照時(shí)間順序排在一起。

So in some situations required high precision, it does not satisfy requirement by using direct FFT to estimate the spectrum.

在測(cè)量精度要求較高的場(chǎng)合，直接利用FFT頻譜估計(jì)顯然無(wú)法達(dá)到要求。

Harmonic analysis theory and real-valued FFT was also discussed.

論述了諧波分析理論和實(shí)序列傅立葉算法；

An efficient method for infrared face recognition by blood perfusion model of human face and FFT is proposed.

提出了一種基于血流圖與雙樹復(fù)數(shù)小波域傅里葉變換的紅外人臉識(shí)別方法。