瞬時頻率 的英文怎麼說

中文拼音 [shùnshíbīnlǜ]
瞬時頻率 英文
instantaneous frequency瞬時頻率穩定度 instantaneous frequency stability
  • 瞬 : Ⅰ名詞（眼珠一動; 一眨眼） wink; twinkling Ⅱ動詞（眨眼） wink
  • 時 : shí］Ⅰ名1 （比較長的一段時間）time; times; days:當時at that time; in those days; 古時 ancient tim...
  • 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...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 頻率 : frequency; rate
  1. Instantaneous frequency estimation of the surface myoelectric signal wigner - ville distribution based technique

    分佈的表面肌電信號瞬時頻率估計
  2. Based on the method, this dissertation deals with several kinds of signals including cosine wave ( cw ), linear frequency modulated ( lfm ) and multi - component signal, furthermore the systematic comparison of estimation effect among cwt and several other usual methods as well cramer - rao bound ( crb ) is given

    基於上述方法，文中分別對單頻矩形脈沖信號、線性調頻脈沖信號以及多分量信號進行了瞬時頻率估計，並與其他幾種常用瞬時頻率估計方法的性能以及crb進行了系統比較。
  3. During the instantaneous frequency estimation of lfm, there exists some error in the edge, so in the dissertation, a fitting method is proposed to modify it. from the computer simulation, the following result is obtained : for cw, the method based on cwt is most effective, and with the snr rising, the error curve of it is more and more closer to crb. for lfm, the method based on wvd gives the best result, and the effects of cwt and stft are similar for multi - component signal, compared to stft and wvd, cwt is a better choice

    通過模擬發現，在單頻回波的瞬時頻率估計中，基於cwt的方法最為有效，隨著信噪比的提高，其均方誤差曲線越來越接近克拉美?羅界；在線性調頻回波的瞬時頻率估計中， wvd法得到的效果最好，而cwt與stft法的估計效果比較接近；在多分量信號的瞬時頻率估計中，相對于stft和wvd法， cwt法是一個更好的選擇。
  4. Firstly the estimation of instantaneous frequency is discussed

    首先是瞬時頻率的估計問題。
  5. Study of analysis of instantaneous frequency in partial wave method

    論局域波法中瞬時頻率分析
  6. Non - stationary data processing methods and instantaneous frequency

    非平穩數據處理方法與瞬時頻率
  7. Order tracking of rotating machinery based on instantaneous frequency estimation

    基於瞬時頻率估計的旋轉機械階比跟蹤
  8. As to the estimation of instantaneous frequency and doa, s

    對于瞬時頻率及方位估計問題，文中均給出了有關水池實驗結果。
  9. The research results show that transducer partially debonding results in clear change of instantaneous frequencies, mode frequencies and damping ratio of the structures

    研究結果表明，傳感器局部開膠對結構的瞬時頻率和模態頻率以及阻尼比均有明顯的影響。
  10. This method can rapidly extract speed law from starting current of dc motor with fairly good precision, and thus the torque - speed characteristic can be acquired

    並通過提取直流電機起動過程電流信號的瞬時頻率有效地研製了一套無轉矩轉速傳感器直流電機的快速測試系統。
  11. Stationary phase method shows that by using information along the ridge defined by the phase on transformed domain, original signal could be represented and reconstructed

    利用穩定位相法的近似公式分析可知，脊上分佈參數包含的信息與信號瞬時頻率變化規律密切相關，並且可以用來對信號進行重建。
  12. According to transcendent knowledge, this algorithm classifies modulation systems by computing instantaneous frequency and instantaneous bandwidth of signal and regarding them as modulation parameters

    該演算法憑借先驗知識，通過計算信號的瞬時頻率和瞬時帶寬，並以此作為制式識別參數來判斷信號的調制類型。
  13. Firstly, the ridge resolution under multi - component situation is analyzed ; a conclusion shows that the resolution is close related with the ratio between component instantaneous frequencies ( if ). generally if this ratio is greater than 2, the ridges could be well separated ; when this ratio is less than 2, the interaction between ridges will form a complex ridge image so that it being impossible to locate single ridge

    首先針對多個信號分量的情況，定量分析了脊的解析度，並得出結論：脊的解析度與信號分量瞬時頻率的比值密切相關，一般在比值大於2的情況下，兩條脊能夠很好地區分；在比值小於2的情況下，脊之間互相干擾，形成復雜的脊分布圖像，無法提取單條的脊。
  14. This dissertation contains the following parts : the extraction algorithm for instantaneous frequency of asymptotic signals based on wavelet ridge is proposed in this dissertation, and the asymptotic estimation method for wavelet transform of asymptotic signals is deeply studied

    本論文主要做了以下工作：提出了基於小波脊線的漸近信號瞬時頻率提取演算法，並研究了漸近信號小波變換的漸近估計方法。
  15. Taking dc motor test as an example, a creative idea of applications of some advanced signal processing tools, such as time - frequency analysis, wavelet, and instantaneous frequency ( if ) evaluation, in motor testing field is presented. the paper systematically summarizes basic theories of time - frequency analysis and wavelet transform based on which an in - depth research of effective if evaluation based on wavelet ridge and wavelet curve is carried out. in the end a fast t - n characteristic testing system with neither torque nor speed sensor is successfully developed

    本論文主要關注小波分析在電機性能自動測試系統中的應用，針對傳統電機測試系統以及信號處理技術在電機測試領域中應用的不足，以直流電機為例，提出了將時頻分析、小波包變換以及基於小波脊的瞬時頻率提取方法應用到電機測試領域的新思路；較系統地總結了時頻分析和小波變換的基本理論，深入探討了基於小波脊線和小波曲線的瞬時頻率提取，並成功開發了基於正交小波包分析和基於小波脊線的瞬時頻率提取的無轉矩轉速傳感器的直流電機快速測試系統。
  16. The paper also studies fast arithmetic and programming of discrete time quadrature wt and wpt and takes a deep look into their additional applications in motor testing, including denoising, filtering and so on. starting from basic theory of time - frequency analysis and wavelet analysis of asymptotic signals, this paper investigates several if law extraction methods and presents an especially effective one using wavelet ridge

    論文從時頻分析的基本理論出發，在漸進信號小波分析的基礎上，研究了漸進信號小波變換的漸進估計方法，提出了利用小波脊線來提取信號頻率隨時間連續變化規律（即瞬時頻率）的方法。
  17. The algorithm is also applied in the broken rotor bars detection in squirrel cage induction machines, which is dependent on detecting the twice slip frequency modulation due to the speed or torque in the stator current, and the rotor bar faults can be detected effectively without some preprocessing

    指出可以利用信號的小波脊線來提取頻率隨時間連續變換的信號的瞬時頻率，並將該瞬時頻率提取演算法成功地應用到異步電動機定子起動電流信號的分析中，有效地提取出了轉子斷條故障特徵。
  18. The " simple " method based on cwt is inducted to underwater signal processing to estimate the instantaneous frequency of echo. in essential, this method is to extract the wavelet ridge from the maximum of continuous wavelet transform, according to the corresponding relationship between wavelet ridge and signal frequency, finally to obtain the estimated instantaneous frequency

    文中將基於連續小波變換的『 simple 』方法引入到水下信號的瞬時頻率估計中來，也即通過尋求連續小波變換幅值的最大值來得到小波脊，再根據小波脊與信號頻率之間的對應關系，最終完成信號的瞬時頻率估計。
  19. Abstract : a software method of frequency - modulated signal demodulating based on wavelet packet is proposed in this paper. a variety of frequency - modulated signals are analyzed in time - frequency domain and the spectrograms are presented. this method can detect instantaneous frequency effectively and get frequency - modulated information, can be widely applied to dynamic testing and software radio

    文摘:提出了基於小波包的調頻波解調方法，通過對各種調頻信號進行時頻分析，給出了信號的時間?頻率譜圖，能有效地檢測到瞬時頻率和獲取調頻信息，該方法可廣泛應用於動態測試和軟體無線電等領域。
  20. In order to reflect the characteristics of amplitude increase and frequency changing of seismic signal, a new automatic recognition method of seismic phase is developed based on the instantaneous amplitude and instantaneous frequency

    摘要為了充分反映地震信號振幅增大和頻率改變的特徵，發展了一種以振幅和瞬時頻率比乘積為特徵參量的震相自動識別方法。
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