spectrum envelope 中文意思是什麼

spectrum envelope 解釋
頻譜包絡
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  • envelope : n. 1. 信封；紙袋；包封，封皮。2. 殼層，外殼。3. 【數學】包（絡）線；包跡。4. 【航空】氣囊；【天文學】包層；【生物學】包膜，包被。
  1. An agonic algorithm of speech logarithm spectrum envelope

    一種語音信號對數幅度譜包絡的無偏演算法
  2. Formant : it uses the estimation of the overall shape of the spectrum ' s amplitude envelope

    共振峰:使用了對頻譜的振幅包絡線的大體形狀所作的估計。
  3. The ship radiated noise is analyzed and its 4 features are extracted from the envelop spectrum. the envelope of ship noise waveform can be demodulated utilizing hilbert transform, and the spectrum components with line rotation frequency of propeller shaft are extracted effectively by bispectrum, 1 ( 1 / 2 ) spectrum and 2 ( 1 / 2 ) spectrum analysis

    對于通過希爾伯特變換解出的艦船輻射噪聲包絡信號進行高階統計量分析，有效地提取出了艦船噪聲的雙譜、 11 / 2維譜、 21 / 2維譜等方面的特徵。
  4. Wavelet analysis is used to translate noise signal of the engine into time - frequency domain. selecting appropriate frequency band to pick up and making its envelope spectrum, then two feature frequency - 0. 5x speed frequency and 2x speed frequency that represent the abrasion condition can be found. in addition, a new diagnosis method of image processing technique is proposed

    利用小波分析將測得的機體噪聲信號變換到時頻域，選擇合適的頻帶加以提取並進行包絡譜分析提取包含特徵頻率的包絡，通過分析提取后的0 . 5倍頻和2倍頻分量，發現兩個特徵頻率可準確反映主軸承的磨損狀況。
  5. We have designed a new type of ijf code to reduce the envelope fluctuation, and have also got the reduced envelope fluctuation ijf - oqpsk. it has faster roll off of the power spectrum and lower energy of band out

    本文設計了一種能夠抑制包絡起伏型的ijf信號碼型，並相應地得到了抑制包絡起伏型的ijf ? oqpsk ，它具有更快的功率譜滾降特性和更好的相位路徑。
  6. As compared with the solution using pulse envelope representation, the propagation equation using complex analytic signal representation reveals different spatiotemporal behaviors such as spectrum redshifting, narrowing, and pulse broadening, etc. 2

    復解析信號解會出現光譜紅移、變窄、脈沖變寬等與脈沖包絡解不同的時空特性。
  7. It is also pointed out that if kanai power spectrum and penzien power spectrum is regarded envelope function in time domain, they are powerful and easy in viewpoint of envelope shape controlling ability. penzien power spectrum is even able to describe the envelope with two peaks like camel

    文中通過分析指出如果把「金井清譜」和「 penzien譜」等模型，看作是時間域中包線，這兩個模型的調節能力都很強，而且比較方便，其中「 penzien譜」模型可以用來表示具有兩個峰點的包線。
  8. We can produce a wide spectrum of paper products with 2 -, 4 -, 5 -, and 6 - color or more. we are capable of handling intricate gluing patterns, window patching and lining, die - cut, foil stamping, embossing, uv coating, water - based coating, pp lamination, corrugated lamination, corrugation, silk screening and envelope making

    勤達可印製各式各樣的紙品，可進行雙色4色5色6色或以上的印刷及多種加工工藝，如復雜的貼盒貼窗模切燙金擊凸uv光油水性光油裱膠裱坑造坑絲印及信封製作等。
  9. The distribution of line - spectrum and its harmonics extracted from the spectral envelope of different target ' s radiated noise exhibits strong differences, which may provide important clue for the detection and classification of targets

    摘要不同類型目標輻射噪聲包絡譜中的線譜及其諧波分佈存在較大差異，是進行目標檢測和分類識別的重要線索。
  10. A new envelope demodulation method based on empirical mode decomposition ( emd ) is proposed to make up the limitation that meaningless frequencies often arise in the envelope spectrum of conventional envelope demodulation method

    摘要提出了一種新的調制信號解調分析技術，來抑制傳統的包絡解調方法中經常出現的無意義的頻率成分。
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