諧波譜頻 的英文怎麼說

中文拼音 [xiébōpǔbīn]
諧波譜頻 英文
harmonics
  • 諧 : Ⅰ形容詞1 （和諧） in harmony; in accord; in tune 2 （詼諧） humorous Ⅱ動詞（商量好; 辦妥） come t...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 譜 : Ⅰ名詞[書面語]1 （按類別或系統編成的書或冊子等） table; chart; register 2 （指導練習的格式或圖形）...
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  1. In this thesis, summarized the basic theories of fourier transformation and the fast fourier transformation that are generally adopted to detect and analyze the electric power harmonic in the electric power supply system. at the same time, summarized the even sample principle, the phenomenon of frequency mix, the window functions and the frequency leaking as so on, those are closely - related to sample from figure signal

    簡要闡述了電力系統諧波檢測分析所普遍採用的傅利葉變換和快速傅利葉變換的基本理論以及與數字信號采樣密切相關的均勻抽樣定理、頻譜混疊現象、窗函數和頻譜泄漏等的基本理論。
  2. Summarized no - line loads and the present situations of the electric power harmonic pollution in the guangyuan district ' s electric power supply system ; explained the theories of fourier transformation and the fast fourier transformation those are widely adopted by majority scholars to examine and analyze the electric power harmonic in the electric power supply system. summarized the principle of even sample, the frequency mix phenomenon, the window functions and the frequency leaking as so on, those are closely - related to the figure signal

    簡要闡述了電力系統諧波檢測分析所普遍採用的傅利葉變換和快速傅利葉變換的基本理論，簡要闡明了與數字信號采樣密切相關的均勻抽樣定理、頻譜混疊現象、窗函數和頻譜泄漏等的基本理論，同時闡述了電力系統的諧波檢測與分析的相關理論基礎知識。
  3. In wavelength conversion based on four - wave mixing ( fwm ) in soa, balance efficiency can be obtained in larger range when increasing saturation power of the optical amplifier and decreasing the saturation power of spectral hole burning and carrier heating

    而在基於soa的四波混頻（ fwm ）波長轉換中，在提高光放大器飽和功率的同時減小光譜燒孔（ shb ）和載流子加熱（ ch ）飽和功率可有效提高較大頻率間隔處的轉換效率，並保持其在較大頻率失諧范圍內的效率均衡。
  4. 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。
  5. The studying results show that the advanced spectral estimation is more predominant than dft algorithm and its corrected algorithms in the field of inter - harmonics measuring, especially for the inter - harmonics which is too close to harmonics. hence, it is effective and feasible to introduce the advanced spectral estimation into inter - harmonics measuring

    上述研究證明，在間諧波檢測領域，特別是對離諧波頻率較近的間諧波檢測中，現代譜估計理論有著許多dft演算法及其校正演算法不可比擬的優勢，將其引入電力系統間諧波檢測中是有效可行的。
  6. In the sonograms of psittacula agapornis after the section of right side nxiits the ascending parts of the tone disappeared. this causes their vocalizations became the descendent - call. and in the sonograms with the left side nxiits sectioned, the harmonic parts above the basic song were weaken or disappeared

    牡丹鸚鵡在斷右側nxllts后其聲圖中音調上升支消失，因而其叫聲變為以降音調為主的降調叫聲；在斷左側nxllts后的聲圖中，其基本音以上的諧波成分減弱或消失而在斷雙側神經后其聲圖表現為一系列具有較低基頻的寬帶諧波譜。
  7. As an example using sine wave, the effect of vibration amplitude and frequency and time on bit error rate is researched

    以振動譜中典型的正弦諧波為例，推導了振幅、頻率和時間對誤碼率的影響。
  8. Abstract : applying the frequency - domain representation of the complex signals in a three - phase system, a harmonic detection method based on the in - phase correlation filtering was put forward in this paper, which can be used to detect effectively the generalized harmonics in the three - phase system except the fundamental of positive sequence

    文摘:採用三相系統復信號的頻域表示並根據頻譜搬移原理，本文提出了一種基於同步相關濾波的諧波檢測方法，可用於三相電路中除正序基波以外廣義諧波的有效檢測。
  9. There are functions such as drawing the chart of amplitude - frequency and phase - frequency, calculating and displaying the highest peak value, the total sum of amplitude and the effective line - breadth of the signal in the program. so an effective technical means is supplied for the analysis of ultrasonic signal

    軟體系統具有幅頻圖及相頻圖的繪制、最高峰值、諧波系數及有效譜寬度的計算及顯示等功能，從而為超聲信號的頻譜分析提供了極其有效的技術手段。
  10. 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

    電力系統諧波分析通常都是通過快速傅立葉變換（ fft ）實現的，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。
  11. The paper, for the harmonics detection method used in power system, presents an sampling method based on frequency multiplication phase - locked. through phase - locked loop to track the power wave, which not only reduces the affect of spectrum leakage to the harmonics analysis, but also realizes quick. accurate and, real - time measurement

    本論文主要針對電力系統中採用的諧波測量方法而提出的一種基於鎖相倍頻採集方法，通過鎖相環對電力波形進行實時跟蹤，既解決了頻譜泄漏對諧波測量精度的影響，又實現了快速的，準確的，實時性的測量。
  12. From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling

    現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。
  13. It is studied that small inclusions in aluminum alloy are detected by ultrasonic transmission method in this paper. frequency analysis of the ultrasonic signal is done. harmonic factor and relative valid spectral power are calculated

    本文採用超聲穿透法對ly12鋁合金板材細小夾雜物進行了檢測試驗研究，並對超聲信號進行了頻譜分析，計算了諧波系數和相對有效譜功率。
  14. By 1 - d fourier transform, we could analyze wave spectrum and get wave speed by computing phrase shift, then calculate the velocity of the wind, so we can avoid the problem of " sub - pixel motion "

    使用傅立葉相位分析法，對示蹤雲進行頻域波譜分析，由諧波的相位變化計算波速，繼而得出風速，能夠避免「亞像素尺度位移」問題，提高導風的精確度。
  15. Finally, the headwaters of harmonic current and its harms to power system are discussed, the influences of harmonic currents to short - circuit verifying are analyzed, some parameters are gained according to the analyse on vibration spectrum of the electrodynamic stress

    最後，討論了電力系統諧波的產生原因及其危害，分析了電力諧波對短路動穩定校驗的影響，通過對含有諧波的短路電動力的頻譜分析，得到相應的動穩定校驗參數。
  16. Harmonic analysis can be produced in as little as 10 milliseconds, or measurements may be integrated over more than a day. the user may set any measurement interval, perform synchronous averaging on harmonics, and even perform full spectrum analysis to detect non - harmonic signal content. the system s main processor controls all display, data storage and i o functions, thus allowing each channel to perform its analysis at maximum speed

    在每通道雙數字信號處理器結構中，結果形成超快速諧波分析，諧波分析可於至10毫秒產生，或可綜合測量超過一天，用戶可設定任何測量區間，執行諧波同步平均，及進行全頻譜分析從而探測非諧波信號內容，系統的主微處理器控制全部顯示數據儲存與i 0功能，故使各通道可於最高的速度下進行分析
  17. Harmonic components of the input current in method 2 is lesser than method 1, neglecting the losses and switching effects of the converter. the decreation of the harmonic components is not apparent, but different between method 2 and method 1, due to the influence of switch losses of the igbt, which is consisted of two igbt and two frd

    當模擬模型中的雙向開關由兩個igbt和兩個快恢二極體組成時，由於igbt的開關損耗等因素對輸入電流的影響，在模擬得到的輸入電流頻譜圖中，諧波成分的減小不是很明顯，但調制策略方式2和方式1的諧波成分仍有所不同。
  18. In practical project, we can have real - time processing by microcomputer to analyze the spectrum of the detected signal ' s harmonics

    我們可以在實際工程中用微機對信號加以實時處理，分析其各次諧波的頻譜。
  19. Harmonic spectrum analysis

    諧波與頻譜分析
  20. In fact, there are many elements which influence the special character, such as the intensity and frequency of the laser, the binding energy of atom, an additional field and so on

    實際上，有許多因素會影響到諧波譜線的具體性質。例如：所加激光脈沖的強度和頻率，原子的電離勢以及外加的磁場或電場等。
分享友人
分享到 Line

分享到臉書