signal noise ratio 中文意思是什麼

signal noise ratio 解釋
信號嗓音比
  • 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...
  • noise : n 1 聲音，聲響。2 叫喊；嘈雜聲，噪音；喧鬧聲；吵鬧，騷動，騷擾。3 〈古語〉謠言，風聲。4 〈美國〉...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. In this paper, the concept of acceleration ambiguity function ( aaf ) and acceleration resolution is put forward for the first time. using aaf, the effects of target ' s relative acceleration on several outputs of a linear - phase matched filter are analyzed, such as the output signal - noise - ratio loss, the doppler resolution, the constraint on optimal accumulative time ( opt ) and their tolerable limits

    論文首次提出並研究了加速度模糊函數和加速度分辨力的有關概念，並以加速度模糊函數為分析工具，詳細討論了加速度對線性相位匹配濾波器的輸出信噪比的損失程度、對多卜勒頻率分辨能力的影響程度、對最優相參積累時間的約束關系以及線性相位匹配濾波器輸出受加速度影響的容限等問題。
  2. Area electronic buoys system is a large - scale underwater sound equipment of tracking and locating moving objects such as submarines, torpedoes and ships. with advanced vector sensors as detective devices, it has excellent antinoise performance, and its signal noise ratio is high

    區域電子浮標系統是一套大型的水聲跟蹤定位設備，其主要任務是準確跟蹤和定位海上多個運動目標（如潛艇、魚雷、船隻等）的運動軌跡。
  3. That is, using a soft thresholding to remove noise components from the wavelet coefficients of the voiced and unvoiced speech in noisy speech respectively in a different way, which is not only removing noise but also is preventing the quality degradation of the unvoiced sounds and enhancing the signal - noise ratio

    該方法採用軟限幅函數對濁音和清音信號的小波變換系數作不同的閾值處理，既抑制了噪聲，又減少了語音段信息的損失，提高了信噪比。
  4. Based on an amplified spontaneous emission ( ase ) source, a ring - cavity fiber laser, in which sensor element acted as the reflector of the cavity, was achieved with high - signal noise ratio ( snr ) and high - power. it was demonstrated that the output power was maximum, when output coupler ratio of the coupler was seventy percent

    實驗證實耦合器的輸出耦合比選為某一個最佳值70 ，當980nm泵光工作電流為50ma時，其輸出功率達3 . 5mw ，且輸出激光波長與作為反射鏡的光纖光柵中心波長相同。
  5. The correlated double sampling ( cds ) circuits structure is used to reduce the fixed pattern noise ( fpn ) of the cmos sensors, and improve the signal - noise ratio ( snr ). the 256 photodiodes arrayed 4 quadrants sensor consists 16x16 active photodiodes array. correlated double sampling processing circuits, output buffer amplifiers and digital control part

    針對cmos製造工藝中mos器件固定模式噪聲（ fixedpatternnoise ， fpn ）較大的不足，研究中採用了相關二次采樣（ correlateddoublesampling ， cds ）電路降低固定模式噪聲，從而提高了傳感器的信噪比（ signalnoiseratio ， snr ） 。
  6. Meanwhile, under the condition of continuous wave radiant, how to get the time difference precisely in the low signal noise ratio become another problem. the paper firstly introduce basic principle of the tdoa location technology while the merits and demerits is also given

    同時，電子戰中不僅有大量脈沖輻射源，而且還有連續波輻射源的現狀使得怎樣在信噪比較低的條件下準確無誤得到輻射源的時差也是該領域一個難點。
  7. In order to improve signal noise ratio ( snr ), wavelet denoising is used, and the radar in - pulse characteristics is extracted by wavelet - ridge, radar emitter signal sorting is realized by neural networks

    該方法首先對接收到的雷達信號進行小波去噪，達到提高信噪比的目的，然後利用小波脊線法準確提取其脈內特徵參數，最後基於神經網路實現信號的分選。
  8. Simultatly, based on the vaviaction of seismic signal - noise ratio, the anthor use the funtion singular method in the seismic data procesy and put forward the wavelet amplitude singular exponentid method and the wavelet power spectrum singular exponential for the fractued density detection

    與此同時，將函數奇異性分析的思想引到地震信號處理中來，針對地震信號信噪比的高低，提出小波振幅奇異性指數法和小波功率譜奇異性指數法的裂縫密度檢測方法。
  9. Raw thermal images acquired by pulsed thermography ( pt ) usually have low signal noise ratio ( snr ) and temperature contrast

    摘要脈沖熱像檢測中直接獲取的原始熱像往往信噪比較低、對比度較差。
  10. To this paper we were carried tentatively on spectrum whitening in prestack, and each section after division scale is processed with spectrum whitening, particularly the composition of high frequency is raised apparently, the signal - noise ratio of high frequency raise. the resolution of whole section is better than stack

    本文還嘗試性地在疊前進行譜白化處理，對分尺度后的各個記錄分別進行譜白化，尤其是高頻成分提高得很明顯，有效地提高了高頻信噪比，整個剖面的解析度明顯增強。
  11. Doing the further research on the division frequency stack on the foundation of study of predecessor, at first the residual moveout correction is done to the seismic record, make the phase axle regularity, doing foundation for the same phase stack ; then carried on division scale processing by wavelet transform ; spectrum whitening is done to each scale, the high and low frequency band need to do prolongs, the middle frequency bands only increase the value of the frequency spectrum ; several kinds of methods that estimate the value of signal - noise ratio has been studied further, and summarize their advantage and disadvantage as well as the scope of application ; the seismic record after spectrum whitening is stacked by weighting with the value of the signal - noise ratio ; then estimate the value of signal - noise ratio which is each scale section after stacking, the scale that the signal - noise ratio is big is assigned big weighting, otherwise, the scale that signal - noise ratio value is small is assigned small weight ing, and carried on weighted reconstruct to each scale section

    本文在前人研究的基礎上，在分頻疊加方面做了進一步的研究。首先對地震記錄進行剩餘時差校正，校齊同相軸，為同相疊加做好基礎工作；然後對地震記錄用小波變換的方法進行分尺度處理；對各個尺度分別做譜白化，對于高、低頻段需要做頻帶延拓，中間頻段僅提升頻譜值；對于幾種信噪比定量估計的方法進行了深入的研究，並且總結了它們的優缺點以及適用范圍；對譜白化后的地震記錄用信噪比估計值作為加權系數進行加權疊加；對于各尺度的疊加剖面也進行信噪比估計，對于信噪比大的尺度給予大的加權系數，反之，信噪比值小的尺度給予小的加權系數，對各尺度疊加剖面進行加權重構。
  12. Firstly, introduce the design of sonar display, trace - to - trace correlation and gray scale display, develop a new method of gray scale based on signal noise ratio. and next, discuss array signal processing and image processing in order to improve the display. finally, develop a software of sonar display simulator based on object oriented programming, with which the sonar display console is simulated and the performance of sonar signal is tested

    本文工作圍繞如何提高聲納顯示效果，介紹了聲納顯示屏幕的設計方案，論述了「跡跡相關」技術、灰度顯示技術在聲納顯示中的應用，提出了基於信噪比的灰度級別劃分方法；結合陣列信號處理、圖象處理技術，本文引入了子帶峰值能量檢測演算法、圖象邊緣檢測演算法，進一步提高了聲納檢測性能；基於面向對象的程序設計方法，設計了聲納顯示平臺軟體，為模擬聲納顯示、檢驗聲納信號顯示性能提供了模擬環境。
  13. This can increase efficiently the signal - noise ratio of seismic record, under the general situation, the signal - noise ratio of big scale is small, because low frequency surface wave in big scale is more serious, the correlate of signal is smaller, so weighting stack can press efficiently low frequency surface wave, comparative promote the percentage of the effectual signal in constructing the signal

    這樣可以有效地提高重構后地震剖面的信噪比，一般情況下，大尺度的信噪比都較低，因為大尺度內的低頻面波比較嚴重，信號相關性較小，這樣做加權可以有效地壓制低頻面波，相對地提升有效信號在重構信號中的百分比。
  14. The interference resisting measures are discussed in the article, such as sensor designing, signal transmission package, pcb designing, signal processing, etc. the measures make the system has a strong ability of interference resisting and enhance the signal noise ratio

    本論文從信號檢測傳感器、數據傳輸通道、 pcb布板、軟體設計等幾個方面重點研究了提高系統抗干擾能力的原理和要採取的措施，使檢測系統具有較強的抑制干擾信號的能力，提高了武漢理工大學碩士學位論文信噪t匕。
  15. The double - frequency laser interferometer belongs to the heterodyne interferometer. it has been proved that this kind of interferometer possesses the advantage of having a higher transform gain, better wave - filter capacity and high spatial resolution. furthermore, this kind of interferometer can filter out background light interference and obtain a measuring signal with high signal / noise ratio

    雙頻激光干涉儀是一種外差干涉儀，理論分析證明：外差干涉具有高的轉換增益、良好的濾波性能及優異的空間鑒別能力，能有效地濾除各種背景光干擾，得到信噪比很高的測量信號。
  16. Moreover, an optimized lna structure - inter - stage inductor matching - is presented, which can achieve conjugate match of two stages, maximize the forward transmission, sequentially increase the signal noise ratio ( snr ) and reduce the noise figure

    並提出了級間匹配電感的設計方案，此優化結構能實現兩級之間的共軛匹配，使信號的正向傳輸最大化，從而增大信噪比，降低了噪聲。
  17. Based on ica post processing matched filter multi - user detection lets the output of traditional matched filter to initialize the ica iterations, not only the known spread information of interesting user is used to overcome the uncertainness of ica, but also the character of statistical independence is used. the simulation results show that it advances the ability of traditional detector when the signal - noise - ratio is large. keywords code division multiple access ; independent component analysis ; channel estimation ; matched filter ; blind multi - user detection

    基於ica后處理的匹配濾波多用戶檢測是用傳統的檢測器的輸出來初始化ica的迭代，它不但充分利用多用戶信號的已知信息，克服了ica的不確定性問題，同時也充分利用了多用戶信號的統計獨立性，模擬實驗結果證明這種多用戶檢測演算法在高信噪的情況下，誤碼性能改善隨著信噪比的提高不斷增加。
  18. The results are checked with respect to signal / noise ratio and spike recovery, thus pragmatically reflect the capability of our lab in this test

    對確定結果進行了信噪比和加標回收率檢查，證明確定結果能客觀地反映實驗室對該方法的測試能力。
  19. The maximum likelihood estimator ( mle ) approach is an important one in frequency estimation domain. this approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation

    最大似然頻率估計法是該領域中的一種重要的研究方法；該方法具有估計結果準確，計算所要求的信噪比門限值低等特點。
  20. Experiment results show that in low bit rate environment, the new image compression scheme performs better than jpeg in the aspects of perception and psnr ( peak signal noise ratio )

    實驗結果表明該演算法在低碼率下，相比jpeg ，獲得了在視覺效果和峰值信噪比方面更好的恢復圖像質量。
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