頻變換 的英文怎麼說

中文拼音 [bīnbiànhuàn]
頻變換 英文
frequency translation
  • 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...
  • 換 : 動詞1. （給人東西同時從他那裡取得別的東西） exchange; barter; trade 2. （變換; 更換） change 3. （兌換） exchange; cash
  1. Through the detailed analysis of the aaf, the defection of using chirp - fourier transform in guidance radar signal processing is pointed out

    通過對加速度模糊函數的形態分析也指明了針對線性調頻信號的二次相位匹配處理（ chirp - fourier變換）在應用到制導雷達信號處理中所存在的缺陷。
  2. Instead of calling aitken transform repeatedly, the improved algorithm call aitken transform in choosing proper occasion only once

    與原演算法相比，改進演算法不頻繁調用aitken變換，而執行選擇適當時機對aitken變換調用一次的策略。
  3. The fractional fourier transform is linear time - frequency transform, and it doesn ’ t have disadvantages of wigner - ville distribution. moreover, the precision of this method is higher, and the performance of antinoise is better

    而分數階傅立葉變換是線性時頻變換，所以它不受交叉項的干擾，沒有不模糊區間減半的缺點，而且它的估計精度高、抗噪性能好。
  4. 300 75 balun for fm and tv broadcast receiver

    調頻電視廣播接收機用300 75平衡-不平衡阻抗變換器
  5. This paper refers to several creation in compatibility with large volume of fed display and conversion of different video signal. it firstly used special central chip al300, designed correlative circuits, successfully developed vga full - color fed console system, compatible with resolution 1280 1024, achieved functions such as multi - video signal conversion and interleaving, met vga ’ s resolution of fed. it firstly designed and fabricated vga interface and separated video interface - - s - video, converting several video signals to 24 bits full - colored digital image signal in fed driving system, achieved separation of luminance signal and chromatism signal, enhanced the bandwidth of luminance signal

    首次採用平板顯示專用控制晶元al300 ，設計並製作了相關配套電路，支持的最高解析度是1280 1024 ，實現解隔行和多種視頻格式轉換的功能，滿足了fed顯示屏對vga解析度的要求。首次在基於fpga的vga級彩色fed控制系統中設計並製作了vga介面和分離電視信號s - video介面，可以將多種視頻信號變換為fed驅動系統可用的24位彩色數字圖像信號，實現亮度信號和色差信號的分離，提高了亮度信號的帶寬。
  6. On the basis of investigation and research about the technology of reconstruction for ict image up - to - date, this paper is devoted to develop an algorithm for image reconstruction based on wavelet theory. in this paper, time - frequency distribution for spatially varying filter was used to construct convolve - kernel by dwt, to modify convolve - back - projection algorithm

    本文在國內外有關ct圖像重建的研究狀況基礎上，根據小波分析理論，利用小波變換在時頻空間的可變性，用dwt變換構造卷積核，對卷積反投影演算法做了改進。
  7. We also researched the frequency structure of ddc and interchanged the filter multiphase heft and taking out - operation using the theory of equivalent counterchange in multisampling system

    從理論上研究了數字下變頻的頻譜結構，利用多采樣率系統中結構的等效變換原理，將濾波器多相分量與抽取操作進行互換。
  8. The digital audio watermarking algorithm based on dwt

    基於倒譜域變換的數字音頻水印演算法。
  9. Digital watermarking algorithm based on wavelet transform, making use of relative frequency equability feature of low - frequency that comes from image ' s mra decomposing and according to size between insert point value and its region mean value, is that two - value watermarking is hid in insert point

    基於小波變換的數字水印演算法充分利用了圖像經過多分辨分解后低頻圖像的頻率相對平穩特性，並依據嵌入點值與其區域均值的大小，將二維二值水印信息隱藏到嵌入點。
  10. On character extraction, the thesis regards handwriting images as texture images, and excogitates analyzing handwriting images with ( 2, 10 ) integer - to - integer wavelet transform innovatively, that is, analyzing texture images with ( 2, 10 ) integer - to - integer wavelet transform mainly, and denoting eigenvectors of handwriting images with integer - to - integer wavelet coefficients, the thesis defines an 18 - dimension eigenvector. ( 2, 10 ) integer - to - integer wavelet transform can extract the high pass of images effectively, high pass is the details of images, and analysis of texture images is mainly for the details

    在筆跡圖像的特徵提取上，文章把筆跡圖像當作紋理圖像來看待，創新地提出用（ 2 ， 10 ）整數小波變換來分析筆跡圖像，即主要用（ 2 ， 10 ）整數小波變換分析紋理圖像，用紋理圖像的整數小波系數來表徵筆跡圖像的特徵向量，文章定義了一個18維的特徵向量。 （ 2 ， 10 ）整數小波變換能夠很好地提取圖像的高頻部分，高頻部分在圖像中表現為細節，而對紋理圖像的分析主要是對細節的分析。
  11. The major work is as follows : solution of two dimensional radiation or diffraction fluid field. this thesis extends multipole expansion method to adapt to disturbed fluid fields of 2d floating bodies with asymmetric forms, which is applied with symmetric forms originally. and given the solution of potential velocity and hydrodynamic pressure of radiation and diffraction fluid fields, which is incited by a 2d arbitrary form, actual application field of the multipole expansion method has been enlarged

    關於二維擾動流場的求解：將通常僅適宜求解具有對稱形狀二維物體擾動流場的多極展開法（保角變換方法）擴展至非對稱形狀二維物體，給出了任意形狀二維物體的輻射和繞射流場的速度勢及水動壓力的頻域解，進一步擴大了多極展開法的實際應用范圍。
  12. In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab

    針對無連接和面向連接的各種復雜網路環境下，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻數據又日益增多的局面，本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義，在前人不斷工作的基礎上，提出了一種優化小波包變換編碼方案用於音頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻信號及多種小波函數做了模擬結果比較，實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果，達到多碼率下實現實時編解碼的過程，在高速dsp晶元等硬體設備支持下，可以有效應用於實際復雜多變信源編碼。
  13. Commutator frequency changer

    整流子頻率變換器
  14. With the development of power electronics technology and devices in recent years, instead of using the industrial frequency transformer to boost voltage, dc / dc high frequency converter achieves the function. the system has higher power density and conversion efficiency, and the size, weight, ac noise of which has been greatly reduced

    近年來，隨著電力電子技術與器件的迅速發展，使用dc dc高頻變換技術代替工頻升壓，系統具有較高的功率密度與轉換效率，裝置體積、重量與交流噪聲大大減小。
  15. As the targets flying in groups may spread over several range of cells and their doppler frequencies are time *. varying, a scheme of target number detection in groups on a conventional low *. resolution radar is proposed based on a time *. range *. doppler image cube which is constructed by substituting a time *. frequency transform for the fourier transform in the conventional range *. doppler imaging

    針對實際編隊目標在距離上的分佈特性和目標多普勒頻率的變化規律，利用聯合時頻變換代替傳統傅立葉變換，建立目標時間-距離-多普勒立體像，提出一種基於立體像的目標架次檢測方法。
  16. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain

    通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。
  17. In this paper, to reduce the volume and weight of the system, this system employs high - frequency converting technology

    為減小系統的體積、重量，採用了高頻變換技術。
  18. Colour frequency converter

    色頻變換器
  19. The radio frequency receiver supports interface for instrument and base station and air interface for mobile station, and it takes the task of magnifying low noise and down - convert and digital baseband processor filtering and magnifying intermediate frequency to reverse link signal. the digital baseband processor samples the received signal after down - convert radio frequency signal to intermediate frequency signal and processes other processing and supports interfaces to computer, next sends data to computer. the gps receiver supports interface for instrument and gps system, and receives gps system signal, next it demodulates the correlative information and sends out benchmark clock signal we need

    射頻接收部分主要為儀器和基站、移動臺提供空中介面，其主要任務是在反向鏈路上對接收到的射頻調制信號進行低噪聲放大、射頻下變頻變換、中頻濾波放大等;數字基帶部分為對接收信號變頻為中頻后進行a / d采樣，以及其他的rsp處理並和計算機提供介面，將數據送至計算機進行后臺處理、顯示等; gps接收機部分為儀器和gps系統提供介面，接收gps系統信號並解調相關信息，輸出所需的電文及時鐘基準信息等。
  20. The symptoms of burnout are : coping mechanism, passive attitudes, increasing leave times, less enthusiasm about in services education and changing jobs frequently etc

    物理治療師的職業倦怠癥狀，主要有：定型化的治療方式、態度消極、請假增多、在職教育不熱心、頻頻變換工作崗位等。
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