窗函數 的英文怎麼說

中文拼音 [chuānghánshǔ]
窗函數 英文
window function
  • 窗 : 名詞（窗戶） window
  • 函 : 名詞1. [書面語] （匣; 封套） case; envelope 2. （信件） letter 3. （姓氏） a surname
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 函數 : [數學] function函數計算機 function computer; 函數計算器 function calculator; 函數運算 functional operation
  1. For the first time, on the view of algorithm and experimental system, the author analyze all the factors influcing the diagnose accuracy. on the basis of these analyses, " window " and convolving function with the best accuracy are selected, at the same time, the formulas of errors are deduced

    在理論分析基礎上，選擇了具有最佳測量精度的窗函數和卷積函數，並對演算法進行了改進，提高了計算精度；對實驗系統各部分對測量精度的影響也進行了定量分析。
  2. 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。
  3. The effect of adding windows that included rectangle window hanning window, hamming window, blackman window was also researched

    研究了幾種窗函數（矩形窗、漢寧窗、海明窗、布來克蔓窗等）對頻譜分析的影響。
  4. For fir, after researching window function method and frequcy sampling method, it is suggested that the filter designed from blackman window function is satisfactory, afterward the filter is programmed with reasonable operational structure

    再分別對fir濾波器的窗函數法和頻域抽樣法進行模擬分析，從中得出用512點的布拉克曼窗函數設計的fir濾波器能滿足濾波要求，然後選用合理的運算結構對此濾波器編程實現。
  5. Fpga and dvb standard are introduced firstly, dvb - c standard and composition of its system are analyzed completely, development of modulator structure and dvb - c digital modulator composition are presented, more over, analysis of respective modular are given. then, principle of dvb - c digital modulator system are presented, they are error control technique 、 mqam 、 nyquist rule and root raised cosine filter 、 window design method for fir filter 、 multi - rate signal processing ( integer interpolating, conversion of fractional sampling, equal conversion of net structure, polyphase structure for filter, poly - phase structure for interpolator, multi - stage implementation of samplying conversion ) 、 distrubited algorithm 、 cic filter 、 dds 、 cordic algorithm

    接著，專門利用一個章節闡述了dvb - c前端調制系統原理，他們了差錯控制技術、多進制調制（ mqam ） 、 nyquist準則與平方根升餘弦濾波器、有限沖擊響應濾波器的窗函數設計法、多抽樣率信號處理包括（整數倍內插原理、分數倍抽樣率轉換、網路結構的等效結構、濾波器的多相表示、內插器的多相表示、抽樣率轉換的多級實現） 、分散式演算法、 cic濾波器、直接數字頻率合成（ dds ） 、 cordic演算法。
  6. 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。
  7. 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。
  8. First, the harmonic analysis method based on fft is discussed, and some practical issues in the application of fft are investigated. the factors which affect the calculation precision of harmonics, such as sampling and weighting of window function, are analyzed, and then the instructive conclusions for designing voltage monitor are obtained

    首先闡述了基於fft的諧波分析方法，對fft實際應用中的問題進行了研究，通過實際算例探討了采樣方法、窗函數加權等影響諧波計算精度的因素，得到了對電壓質量監測儀的設計具有指導意義的結論。
  9. One is the non - orthogonal gabor - daubechies frame, or g - d frame, a complete set of discrete window fourier functions which are constructed by space - shifting and harmonically modulating a gaussian window. although a g - d frame is not an orthogonal basis, it bears considerable advantages for the study of physical problems, especially those related to the wave field extrapolation, due to the optimal localization properties of the gaussian window function under the heisenberg uncertainty principle

    其一為將高斯窗函數經平移和調制而構成的一組窗口富里葉框架（ gabor - daubechies框架，或g - d框架）基本函數，另一種為在富里葉分析和小波包理論基礎上發展起來的局部餘弦基函數。
  10. Thirdly, the process of this algorithm is described in detail, and a comparison of the dc - dispersion results among different size of window functions is made

    然後詳細講述了這種消色散演算法的具體實現步驟，並且比較了在選取不同長度的時間窗函數的情況下，消色散的處理過程和殘余色散量。
  11. In the terms of interpolation, the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character. 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation, the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation, the more number of summation and the more order of interpolation polynomial, the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation, the more of reconstruction time simultaneously, aimed at eliminating the effects of noise contained in projection data, in this paper, author analysis cause and effects of common artifacts. importantly, discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector

    在ct圖像重建時，選擇有限帶寬窗有較好的空間解析度，三角形窗有較好的密度解析度，選擇餘弦窗則使得空間解析度與密度解析度的折衷；從窗函數的頻譜角度來講，可以用於圖像重建的一個良好的卷積窗函數應該具備以下條件： （ ? ）小的3db帶寬b ，即最小的主瓣寬度； （ ? ）最小的旁瓣最大峰值a ； （ ? ）最大的旁瓣峰值衰減速度d ；就內插函數而言，臨近點內插與線性內插重建圖像噪聲大，但有較好的邊緣與細節； 4 4三次內插、三次b -樣條與四次拉格朗日多項式內插圖像平滑，局部特性較好。
  12. This article takes hanging off and wide fluctuation of transmition velocity of adsl as example, then analysis centers on the discerte multiple tone and the principle of channel load assignation. from analysis above article points out the root of adsl being sensible of noise signal. at last, reserches effects that window function and barrier effect on frequency and adopts fft to work out the noise power of adsl

    本文以電信現在推出的adsl傳輸中鏈路經常掉線和傳輸速率經常大范圍波動為例，重點分析了adsl所使用的dmt調制方式和注水演算法分配通道載荷方式原理，由此指出adsl對噪聲信號敏感的根源，在得到問題的根源之後，分析了窗函數和柵欄效應對頻譜的影響，採用fft方法計算adsl線路的噪聲功率譜，為adsl線路測試提供了可靠的理論依據。
  13. Basing on the result of former research, this paper synthetically analysis character of common window function and interpolation, author has conclude a few of basic principle during choosing windows function and interpolation in the process of ct image reconstruction in the terms of windows, among of the introduced windows, band - limited window, triangle window and cosine window must be the ideals choose

    基於前人的研究成果，本文綜合分析了常見窗函數與內插函數的特性。理論分析和實驗結果得出可供選擇的選擇窗函數與內插函數以及如何根據實際檢測目的來選擇較好參函數所遵循的原則。
  14. Design and application of 2d window function

    二維窗函數的設計與應用
  15. The problem of sequential resonance assignments was solved by the analysis of noesy spectroscopy

    Ft變換前用相移的正弦窗函數處理。
  16. In this thesis, some traditional methods are introduced, such as, window method and frequency sampling method

    本文介紹了一些傳統的方法，如窗函數法、頻率采樣法。
  17. In this paper, the author attempts to discuss two main problems of convolution back projection algorithm basing on fan - beam scanning

    本文主要探討了卷積反投影演算法的兩個核心問題：卷積窗函數與內插函數。
  18. In the software design, we used the window function to improve the resolution of the spectrum, then improve the precision for measurement

    軟體方面介紹了基於快速傅立葉變換原理的測相方法，並結合窗函數來提高頻譜的解析度，從而提高了測量的精度。
  19. Abstract this paper investigated the window effects and the spectrum amplitude errors in hamming windowing spectrum analysis in detail and gave its compensation coefficients

    摘要主要以漢明窗為例，定量分析了窗函數引起的信號幅度譜誤差，給出了相對幅度譜補償系數的理論值。
  20. The simulation result shows that the synthesized method is easily implemented with high precision, which is also applicable for all kinds of symmetrical window function and having high ability of anti - noise

    模擬結果表明，該方法實現方便，校正精度高，適合各種對稱窗函數，抗噪聲能力強。
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