signal compression in time 中文意思是什麼

signal compression in time 解釋
信號時間壓縮
  • signal : n 1 信號，暗號；信號器。2 動機，導火線 （for）。3 預兆，徵象。adj 1 暗號的，作信號用的。2 顯著的...
  • compression : n. 1. 壓縮；壓緊；濃縮，緊縮。2. 加壓；壓抑。3. （表現的）簡練。4. 應壓試驗。
  • in : adv 1 朝里，向內，在內。 A coat with a furry side in有皮裡子的外衣。 Come in please 請進來。 The ...
  • time : n 1 時，時間，時日，歲月。2 時候，時刻；期間；時節，季節；〈常pl 〉時期，年代，時代； 〈the time ...
  1. Arithmetic figure that new dvd that conduct and actions world the adoption arithmetic figure of the first style see the port dvi port to broadcast, three stars the dvd - hd938 to can output to have not yet the compression to see the signal, but have no to need to pass by few molds the conversion process, from but avoided the loss of the painting quality with lose true, deliver the real arithmetic figure signal to television the dvi port is a high take the ieee1394 port breadth port, its deliver the speed to attain 5 gbps, is more than ten times to deliver the speed. at the same time, need not proceeding of port of adoption dvi few mold conversion, can avoid to convert what process result in to lose true, from but real realizes the arithmetic figure deliver

    作為世界第一款採用數字視頻埠dvi埠的新型dvd播放器，三星dvd - hd938能夠輸出未經壓縮的數字視頻信號，而無需經過數模轉換過程，從而避免了畫質的損失和失真，向電視傳輸真正的數字信號dvi埠是一種高帶寬的埠，其傳輸速度達到5gbps ，是ieee1394埠傳輸速度的十幾倍。同時，採用dvi埠不用進行數模轉換，可以避免轉化過程造成的失真，從而真正實現了數字傳輸。
  2. In this thesis, we subsequently introduce the basic concepts of wavelet transform, especially the pyramidal algorithm and its fast realization - lifting scheme ; this scheme can decrease the time and space complexity of wavelet transform greatly. wavelet transform, the most perfect mathematical tool of signal processing theory, makes great success in the field of data compression. ezw and spiht are the milestones of wavelet image coding on the noiseless channels, and jpeg2000 adopts the ebcot algorithm

    嵌入式零樹小波編碼（ embeddedzerotreewavelets ）和多級樹集合分裂演算法（ setpartitioninginhierarchicaltrees ）都是迄今為止最為優秀的理想通道情形下的小波編碼方案：而jpeg2000靜態圖像壓縮國際標準採用的是嵌入式碼流優化截斷塊式編碼演算法（ embeddedblockcodingwithoptimizedtruncationoftheembeddedbit - streams ） 。
  3. One is to use fourier transformation to convert the source signal from time domain to frequency domain and to discard high frequency harmonious components upwards of 19 ( gb / t14953 - 93 d5. 3 demanding ), then to have static huffman coding to the quantized char array which is composed of reserved direct current component and basic wave and each high frequency " s amplitudes and angles. the other is to use discrete wavelet transformation to convert the source signal from time domain to frequency domain and to set the high frequency coefficients that its absolute value is smaller than the given threshold to zero, then to have dynamic huffman coding to the quantized char array which is composed of multiple, wavelet ' s level, datum length, low frequency coefficients and reserved high frequency coefficients. mass simulinks and analyses under the two circumstances have done to show that data compression ratio is small and the relative error is also small and within the permission of engineering and the compression problem can be solved in theory of measured datum of power system

    第一種情況的壓縮方法為：採用傳統的傅立葉變換把原始信號從時間域變換到頻率域，舍棄20次及其以上的高次諧波成分（保證了gb / t14953 ? 93d5 . 3要求） ，然後對保留的直流分量、基波和各次諧波的幅值和相角數據量化后和量化時分別乘以的倍數系數構成一個數組，以字元形式保存，採用靜態huffman編碼對變換數據進行壓縮；採用離散小波變換把原始信號從時間域變換到頻率域，然後對分解得到的高頻系數進行閾值量化處理，對乘以的倍數系數、小波變換的階數、小波變換后的低頻、各級高頻以及原始數據長度、量化后的低頻系數以及保留的高頻系數大小、位置構成一個數組，以字元形式保存，採用動態huffman編碼對這個文件進行壓縮。
  4. With the progress of digital signal processing technique, pulse compression processing system are developed from analogue or digital - analogue system to all digital ones. digital pulse compression processing can be divided into pulse compression processing in time domain and pulse compression processing in frequency domain

    隨著數字信號處理技術的進步，脈壓處理系統也從模擬式、數模結合式發展到全數字式，數字式脈壓處理又分為時域脈壓處理和頻域脈壓處理。
  5. In satellite navigation and positioning system, time is important information for fast and direct acquisition of long cycle code, one of its important aspects is the uncertainty compression of signal ' s propagation delay to reduce time search range

    摘要衛星導航定位系統中，輔助長碼快捕的一個最重要的信息是時間信息，衛星信號傳播時延估計是提供先驗時間信息，減少時域搜索范圍的一個重要方面。
  6. We study the wavelet neural network theory and how to build models. the wavelet networks can be used in ecg signal compression by adjusting wavelet basis and weight values. at the same time, this algorithm also can reconstruct the ecg signal very well

    在理論研究了小波變換方法和神經網路的基礎上，提出了基於小波神經網路的ecg數據壓縮演算法，並分析研究了基於小波神經網路壓縮ecg數據的原理和模型的構建方法。
  7. The taboo - search algorithm and the ordinary genetic algorithm are combined in this paper and the new algorithm is named taboo - genetic algorithm. the new algorithm is applied into the matching search of domain and range in fractal image coding. the result shows that the coding time is decreased greatly when the compression ration and the peak signal and noise ration do not decline

    后來把禁忌搜索演算法與簡單遺傳演算法相結合，提出了一種新的禁忌搜索遺傳演算法，並應用於分形圖像壓縮編碼的定義域、值域匹配搜索，從而在不降低峰值信噪比和壓縮比的情況下極大地改善了分形圖像壓縮編碼的速度。
  8. Discuss the sar imaging theories and sar echo signal processing, simulate the single - point target echo and multi point target echo imaging in software method ， realize the parallel processing algorithm of bearing pulse compression on hhpc and also study its real time performance

    3 .討論了sar成像的基本原理及其信號處理，對點目標和多點目標回波成像進行了軟體模擬，並在hhpc上實現了數據轉置和方位脈壓并行處理演算法，對方位脈壓的實時性進行了研究。
  9. Wavelet transform is a time and frequency local transformation and it can withdraw the information from the signal. through the calculate function making the muti - scale analysis it resolves many difficult problems which fourier transformation ca n ' t resolve. in recent years the researches and the applications of wavelet transform on the image compression are flourish, but because wavelet transform is very complicated and its apply has certain localizations

    小波變換是一個時間和頻率的局域變換，因而能有效的從信號中提取信息，通過伸縮和平移等運算功能對函數或信號進行多尺度細化分析，解決了fourier變換不能解決的許多困難問題。近年來小波變換在圖像壓縮的研究和應用都十分活躍，但是由於小波的理論很復雜，因此應用起來就有一定的局限性。
  10. Agrawal ' s theory model of soa ca n ' t simulate accurately the amplified signal pulse shape in soa when the pulse width is as short as several picosecond. so we simulate accurately the peak power, full width half maximum, rising time and falling time of amplified pulse after considering the gain compression, gain asymmetry, gain shift, gain variable with situation and time. with ultrahigh velocity dense wavelength division multiplexing ( dwdm ) and optical time division multiplexing ( otdm ) developing, we demand more and more short signal pulse and more signal channels

    但當信號脈沖的寬度只有幾個皮秒時， soa傳統的agrawal理論模型已經不能完全準確地模擬soa對信號脈沖的放大情況，在此基礎上，我們在全面考慮soa的增益壓縮、增益非對稱和漂移、增益隨位置和時間變化的載流子壽命等物理機制的情況下，對皮秒超短高斯信號光脈沖經soa放大后的脈沖的峰值功率、脈沖半值全寬度、脈沖的上升時間和下降時間等重要物理參量進行了準確模擬和詳細研究。
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