fourier analysis method 中文意思是什麼

fourier analysis method 解釋
傅里葉分析法
  • 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...
  • analysis : n. （pl. -ses ）1. 分解，分析；【數學】解析。2. 梗概，要略。3. 〈美國〉用精神分析法治療（＝ psychoanalysis）。
  • method : n 1 方法，方式；順序。2 （思想、言談上的）條理，規律，秩序。3 【生物學】分類法。4 〈M 〉【戲劇】...
  1. Fourier analysis has been changed to fit to analyze unsteady signal, which is represented by short - time fourier transformation. but in essence, the short - time fourier transformation is a method of ingle resolution because it uses an unchanged short - time widow function

    但從本質上講，短時傅里葉變換是一種單一解析度的信號分析方法，因為它使用一個固定的短時窗函數。
  2. Abstract : events contributing to the establishment of statistics the science of data and its chemical branch are epitomized. as the new chemical branch named chemometrics or chemstatistics has been disputed in the circles of chemistry for a long time, reasons for adopting chemstatistics are given, which is defined as the science of gathering or generating, describing, summarizing and interpreting the data concerned to acquire new chemical knowledge or information. the fact that many traditional statistical methods, such as significance tests, analysis of variance, regression and correlation, and some others not usually considered statistical, such as model building, monte carlo method, fourier transformation, artificial nerval networks and pattern recognition, each contains one or more of the five connotations of statistics is expounded. the regular pattern that a chemstatistician grows up is approached. the urgent task is to include chemstatistics in the undergraduate or graduate curriculum of chemistry specialty. the goal of the project is to nurture chemists who know statistics

    文摘:本文追溯了統計學發展、建立中的大事，陳述了它的定義及其化學分支發展、建立的梗概；鑒于化學界對該新興化學分支學科的名稱長期存在爭議，提出了以化學統計學而不以化學計量學為該學科名稱的理由，把化學統計學定義為一個研究有關數據的收集或產生、描述、分析、綜合和解釋，以獲得新化學知識或信息的學科；闡明了許多公認屬于統計學的方法，如顯著性檢驗、方差分析、回歸和相關，以及一些尚未認定屬于統計學的方法，如模型建立、蒙特卡羅方法、傅立葉變換和人工神經網路，都含有統計學5個內涵中的一個或多個；探討了化學統計學家成長的模式，認為當務之急是把化學統計學納入化學專業的教學計劃，以培養懂統計學的化學家。
  3. Wavelet analysis is a novel mathematical theory and method proposed in 1980s. it is regarded as a breakthrough of fourier analysis because it has many wonderful characteristics. fourier analysis consists of breaking up a signal into slue waves of various frequencies

    小波分析及小波變換是80年代中期發展起來的一門新興的數學理論和方法，它被認為是傅里葉分析方法的突破性進展，它具有許多優良的特性。
  4. Fourier analysis is the mathematical method used to break sounds down into sine waves

    傅里葉分析是將聲音分解為正弦波的數學方法。
  5. A fourier analysis method for discontinuous time series for pressure

    時間不連續壓力序列的傅立葉分析方法
  6. Because massive harmonic interference in the electrical network, it causes signal - sampling to include the very big harmonic in the measurement system, for eliminating measurement result influence by harmonic, the paper has an in - depth study of fourier transformation harmonics analysis measurement principle, analysis the forming reasons of frequency spectrum leakage and railing effect during measurement, achieves phase locked loop and frequency multiplier technique to realize integer - period synchronous sampling and eliminate impact of frequency spectrum leakage and railing effect in the result of measurement, and investigates in depth theory on phase locked loop and frequency multiplier technique, gives the method of realizing phase locked loop and frequency multiplier technique

    由於電網中存在大量的諧波干擾，導致測量系統中取樣信號也含有很大的諧波，為了消除諧波對測量結果的影響，論文深入研究了傅立葉變換諧波分析法的測量原理，分析了測量中頻譜泄漏和柵欄效應形成的原因，提出了採用鎖相環倍頻技術實現信號的整周期同步采樣，消除頻譜泄漏和柵欄效應對測量結果的影響，並對鎖相環倍頻技術的理論進行了深入研究，給出鎖相環倍頻技術的實現方法。
  7. 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

    摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩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，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，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。
  8. After the comparison of the merits and faults between fourier spectrum analysis method and wavelet - neural network analysis method, the latter is selected. after the research on the principle of accuracy - loss diagnosis of the dynamic measurement, the diagnosis theory and method are advanced. according to the error model established of the dynamic system and the results of the error tracing, using bp neural network, the accuracy - loss law of each inner unit is acknowledged

    對于實際進行誤差分解與溯源的信號處理方法，在比較了譜分析方法與小波神經網路分析方法的優缺點之後，指出譜分析方法的分解結果不夠理想，並最終確定用小波神經網路來進行實際測量系統的誤差分解與溯源。
  9. 2 several theory analysis methods for properties of fiber gratings are presented including the coupled - mode theory, transfer matrix approach, multi - film method and fourier transfer method. these methods have their own characteristics and scope of application

    2介紹了光纖光柵的理論特性分析，並分別利用耦合模理論、傳輸矩陣法和傅立葉變換法對各類型光纖光柵（布拉格光柵、長周期光柵、啁啾光柵）的光譜特性進行了分析。
  10. Vibration signal of cable - stayed bridge often have non - stationary and timely character. traditional fourier transform is a kind of whole transformation and short - time fourier transform have the limitation that if short - time window is ascertained, its shape is also certain. but wavelet analysis method have higher and lower time solution at low frequency, have lower frequency solution and higher time solution

    斜拉橋的振動信號常呈現非平穩時變特點，傳統的傅里葉分析是一種全局的變換，短時傅里葉變換也存在著當短時窗函數確定后，窗口的形狀就確定了的缺陷，不適于處理斜拉橋動測信號。
  11. 2. several theoretical analysis methods of fiber grating characteristics are presented, including the mode - coupling theory, transfer matrix method, multi - film method and fourier transfer method. the spectra of the fbg and lpg have been analyzed by these methods. the multiplexing techniques and fiber grating demodulation methods are introduced in this dissertation

    2 、系統介紹了光纖光柵的理論分析方法，並利用這些方法中的耦合模理論、傳輸矩陣法和傅立葉變換法對布拉格光柵、長周期光柵、啁啾光柵的光譜特性進行了分析並詳細介紹了光纖光柵傳感的復用技術和解調技術。
  12. This equation solving method overcomes the shortcomings of simulation software on thermal field analysis, strongly complements the commonly used 1 - d temperature distribution to analyze thermo - optic devices in literature. the results avoids complicated form of solutions provided by fourier transform method, and thereafter lend itself to analyze the influence of thermo - optic to attenuation characters and power consumption in waveguide

    這種方法克服了模擬軟體在熱場分析上的不足，是對現有文獻多數採用一維溫度分佈作為熱光器件分析的有力補充，也避免了傅立葉變換法的復雜形式，為後面分析熱光效應對器件衰減性能和功耗的影響打下了基礎。
  13. According to the theory of electromagnetic fields, the large salient synchronous generator with fractional stator slot are calculated and analyzed by the finite element method ( fem ) in this paper. the fourier analysis method is applied to decompose the air gap magnetic density into the basic spatial component and a series of harmonic components and wave shape eigen coefficient of air gap magnetic field are calculated

    本文根據電磁場理論，從耦合場的弱耦合角度首先計算了定子具有分數槽繞組的大型水輪發電機的電磁場，採用付立葉諧波分析的方法把氣隙磁密分解為空間基波和一系列諧波，進而計算出氣隙磁場波形特徵系數。
  14. In this paper, based on the wavelet theory which is considered an important breakthrough to fourier analysis, the variations of air temperature and precipitation during the recent 50 years in heilongjiang province have been analysed using the morlet wavelet transformation method. wavelet transformation with fourier power spectral analysis are compared

    本文以近年來被認為是fourier分析方法突破性進展的「小波理論」為基礎，採用morlet小波變換方法分析了黑龍江省近50年來的氣溫和降水的變化規律，並與傳統的功率譜分析結果進行了比較。
  15. Abstract : according to the method of limited fourier analysis, the author approaches the real cam by means of n times frequency wave method, and imitates a certain of cam in good performance with the method

    文摘:採用有限傅立葉分析的方法，用n次諧波法去逼近真實凸輪，且利用這種方法，仿製某一性能良好的凸輪。
  16. The classical signal analysis method is fourier transformation, whose essence is to decompose the signal wave into many sine waves, and which also can be seen as representation of time function in frequency domain

    傅里葉（ fourier ）變換是經典的信號分析方法，其實質是：把波形分解成許多不同頻率的正弦波之和，可看作是時間函數在頻率域上的表示。
  17. In this paper, aimed at the problems existed in theoretical analysis and application of ftm, the discrete fourier transform method is applied to analyze the traditional ftm ( tftm ). and computer simulation is applied. the main propose is to solve the problem, such as frequency shifting, selection of carrier frequency big or small and selection of filter window size. considering the feature of double - exposure holographic interferometry, we propose a modified ftm ( mftm )

    針對二次曝光數字全息干涉術中ftm存在的理論缺陷和具體應用到二次曝光全息干涉計量中存在的問題，本文從離散傅立葉變換的角度對傳統的傅立葉變換法（ tftm ）進行了理論分析和計算機模擬計算，並重點致力於解決ftm中的移頻問題、載頻大小的選擇以及濾波窗口大小的選擇等關鍵問題，結合二次曝光全息干涉的特點提出了改進的傅立葉變換法（ mftm ） 。
  18. Chaper six compared the emd - based time - frequency analysis method to the typical ' s : short time fourier analysis, wigner distribution and wavelet anlysis, the result showed that the emd - based ' s is better than the others. to weaken the crossing interfere in multi - components signal in wigner distribution the emd - based wigner distribution was proposed and the study result showed that the method is valid. chapter seven built a experiment system at the base of rotor test bed, discussed characteristics of several typical fault in rotating m

    第六章把基於emd的時頻分析方法分別與短時傅里葉變換、 wigner分佈分析、小波變換進行了比較研究，結果表明，基於emd時頻分析方法比上述方法有效；針對wigner分佈分析的交叉項干擾，提出了基於emd的wigner分佈分析新方法，研究結果表明新方法能有效地消除交叉項干擾。
  19. This method of generating a complex sound is sometimes referred to as " fourier synthesis ", in honour of joseph fourier, the mathematician who discovered the basis of what we now call fourier analysis

    為紀念約瑟夫?傅里葉（他是發現了我們現在稱之為傅里葉分析的原理的數學家） ，這種生成較復雜聲音的方法有時被稱為「傅里葉合成」 。
  20. In this paper, we apply the fourier transform method ( ftm ) of the phase analysis method to double - exposure holographic interferometry and propose double - exposure digital holographic interferometry

    本文將相位分析技術中的傅立葉變換法（ ftm ）引入二次曝光全息干涉計量中，提出了二次曝光數字全息干涉術。
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