頻數比 的英文怎麼說

中文拼音 [bīnshǔbǐ]
頻數比 英文
frequency ratio
  • 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...
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 比 : Ⅰ動詞1 （比較; 較量高下、 長短、距離、好壞等） compare; compete; contrast; match; emulate 2 （比...
  1. 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。
  2. The if digital receiver based on software radio technology adopts the structure of fpga plus dsp, which is more powerful than other systems in signal processing, and is able to complete iq demodulation accurately and acquire characteristic of the signal. the following four aspects is included :

    該中頻數字接收機以軟體無線電思想為核心，採用dsp + fpga的硬體結構，在信號處理能力方面比以往的系統有了很大的提高，能夠精確的完成信號正交解調和抽取濾波和特徵信息的提取。
  3. Our treatment shows in the raman effect case, mnls solitons, the same as nls solitons, keeps its energy, initial center and initial phase unchanged. however, the raman effect, not the same as nls solitons. reduces its amplitude, widens its width and under the same conditions, the self - frequency shift of mnls soltions is closer to the result of numerical simulation. in the raman effect together with frequency filters case, mnls solitons, the same as nls solitons, keeps initial center and initial phase unchanged and bandwidth - limited frequency filters can make the mean frequency of mnls soltion stand a steady value at the red side of the initial mean frequency, i. e. suppress the self - frequency shift of mnls soltions. and that, the other physical parameters of mnls soltion last stand a steady value. however under the same conditions, the steady value of the mean frequency of mnls soltions is closer to the initial mean frequency and the result of numerical simulation

    有所不同的是， raman效應雖然不改變孤子能量，但會引起孤子峰值的下降和寬度變寬，且在同一條件下， mnls孤子微擾理論得到的自頻移比nls孤子微擾理論得到的更接近直接數值計算結果。有限帶寬的頻率濾波也不引起mnls孤子初始中心、初始位相的改變，選取適當的頻率濾波器參數值能使孤子的平均頻率穩定在初始平均頻率的紅側一穩定值，抑制了自頻移，而且孤子的各物理量最後都穩定在一穩定值，這些與nls孤子微擾理論都是類似的。有所不同的是，寬度為飛秒量級下， mnls孤子平均頻率的穩定值更接近初始平均頻率，更接近數值計算結果。
  4. A new method to estimate doppler centroid and doppler rate applicable to real flight condition is proposed

    該方法設置飛機速率和脈沖重復頻率比為常數，保證方位向接收信號均勻空間取樣，使用實時最小二乘擬合演算法。
  5. Each unit of transformer is tested in accordance with the following items : winding d. c resistance test. measurement of turn ratio and calibiation of voltage vector relation. measurement of impedance voltage and load loss

    直流電阻測試匝數比測量及電壓矢量關系的校定阻抗電壓及負載損耗的測量空載損耗及空載電流的測量工頻耐壓測試感應耐壓測試絕緣電阻測試局部放電測試外觀和尺寸的檢驗銘牌的檢驗等。
  6. Windings d. c. resistance measurement, measurement of impedance voltage and on - load loss, measurement of no - load loss and on cload current, power frequency withstand voltage test, inductive voltage with standing test, measurement of partial discharge level, inspection of appearance and dimension inspection of name plate

    直流電阻測試匝數比測量及電壓矢量關系的校定阻抗電壓及負載損耗的測量空載損耗及空載電流的測量工頻耐壓測試感應耐壓測試絕緣電阻測試局部放電測試外觀和尺寸的檢驗銘牌的檢驗等。
  7. When the frequency approaches zero, the factor approaches zero correspondingly ; 2 ) the amplitude of interaction factors changes with the incident angle of rayleigh waves and reaches maximum when is zero. moreover, with the increase of, the wave period shortens apparently ; ( 3 ) the amplitude of interaction factors decreases as the pile spacing increases and approaches to zero when the pile spacing is 15 ; 4 ) the amplitudes of interaction factors increase clearly with the increasing stiffness ratio of pile to soil ; 5 ) the lat eral seismic response of fixed - head pile groups is much smaller than that of free - head pile groups. moreover, the pile - group effects induced by rayleigh waves can be neglected ; 6 ) the lateral seismic response of piles at different location differs from each other

    得到了以下結論： 1 ）樁的相互作用因子隨頻率呈周期性變化，在振動頻率比較低的情況下，樁的橫向相互作用因子也較低，當頻率趨近於零時，相互作用因子也趨近於零； 2 ）樁的相互作用因子的幅值隨瑞利波入射角度的變化而變化，在= 0情況下幅值最大，且隨入射角度的增加，波動的周期明顯縮短； 3 ）樁的相互作用因子的幅值隨著樁與樁間距的增加而減小，至s d = 15時，樁的相互作用因子基本趨近於0 ； 4 ）在頻率比較低時，相互作用因子幅值隨樁土相對剛度比的增加而顯著增加； 5 ）樁頂固接可以有效地降低群樁的橫向地震響應幅值，由瑞利波產生的群樁效應可以忽略不計； 6 ）群樁中不同樁位的樁的橫向地震響應是不同的，每根樁所在的樁位對其橫向地震響應有很大的影響；刀樁數的增加並不能減小樁的橫向動力響應。
  8. In addition, based on the analysis of several factors including the single - double - layer span ratios, the height - to - span ratios and the pipe types, the nonlinear analysis gives important suggestion to engineering application

    同時考慮了幾何非線性的影響，在幾何非線性的影響下分析結構隨跨度、矢跨比、網格頻數等參數受地震荷載的響應情況，對工程應用提出有科學價值的建議。
  9. Chapter 5 explains the signal flow in the if module and the theory in fm modulating and demodulating, and shows a few algorithms of the fir filter design and the spectrum comparing realized by the dsp chip, produces their result in the matlab simulator and real circuit debugging

    第五章介紹了數字中頻模塊的信號流程、 fm信號調制與解調理論，介紹了用dsp晶元實現的fir濾波，頻譜比較等演算法的matlab模擬與實際電路的調試結果。
  10. In the plate region of a vehicle image, the gray value varies frequently in cross - direction, so we define a parameter ". cross variance " to describe it. we also calculate other parameters to approximately locate the plate, they are the space length between two chars, the thickness of stroke, the peak and trough of gray value, the ratio of width and length, etc. at last, we exactly locate the plate by the theory of mathematical morphology

    該方法根據圖像車牌區域橫向灰度值變化頻率比較大這一特徵提出了橫向方差參數，並結合車牌的字元間距、筆劃粗細、灰度峰谷值、長寬比值等特徵粗定位車牌，在車牌的精確定位中利用了數學形態學的方法。我們從某高速公路收費站實地拍攝的照片中選取了1000多幅作為實驗樣本數據。
  11. The result follows : ( 1 ) cg lightning in common thunderstorm with weak convective intensity is active at the developing and mature stages, the negative flash rate begins to decline gradually afterwards. the cg flashes in all lifetime are almost of negative polarity and very rarely positive polarity

    分析結果表明：對流強度弱的普通雷暴在發展階段和成熟階段地閃比較活躍，在成熟之前出現地閃頻數的峰值，隨后地閃頻數逐漸減小，整個生命史中幾乎全為負地閃，極少出現正地閃。
  12. In the fact that different kind of audio has different distribution, audio classification can be achieved by the degree of distribution similarity in the feature space between the unknown audio and the audio trained be fore

    根據不同種類的音頻數據有不同分佈這一事實，比較未知音頻與已知音頻種類的數據在特徵空間中的分佈情況的近似程度，就可完成音頻分類。
  13. If some values for a column occur much more frequently than others, the data has

    如果一列中的某些值所出現的頻率比其他的要大很多，則該數據存在
  14. With complete audio converter lite all of the format parameters like frequency, bitrate, channels, etc. can be configured

    具有完整的音頻轉換器建興所有的格式參數，如頻率，比特率，渠道等，可以配置。
  15. To reduce the massive volume of digital video data, compression techniques with high compression ratios are required

    為了減小數字視頻數據量，需要高壓縮比的壓縮技術。
  16. The frequency of minimum - value fluctuates faintly while the maximal - value ' s fluctuating is more complex and fiercer

    極小值次數波動比較小，極大值頻數比較復雜，且變動較劇烈。
  17. After the weather system getting into mature stage, its cg flash rate begin to decline and its percentage of positive cg lightning begin to go up rapidly meanwhile. sometimes all the cg flashes produced at dissipating stage are of positive polarity

    在系統進入成熟階段后，地閃頻數開始下降，而正地閃所佔比例顯著增加，在系統消散階段甚至會出現短時間內全為正地閃的現象。
  18. First, build the building model and air conditioning dynamic cooling load analysis model of the stock exchange in the basis of the experiment. second, calculate the air conditioning dynamic cooling load in summer ( april to october ) hourly by software simulation, obtain the maximum cooling load daily, the minimum cooling load daily, the proportion of each cooling load occupying the total cooling load and cooling load time frequence, analyse them by using twin load curves. last, contrast theoretical calculations with test results, analyse them and prove the model proper

    首先，以實驗為基礎建立了證券營業部的建築模型及空調動態冷負荷分析模型；其次，通過逐時逐日計算出了其夏季（ 4月? 10月）空調動態冷負荷、各分項冷負荷在空調總冷負荷中所佔的比例及空調冷負荷時間頻數，並運用雙負荷曲線法對每日最大冷負荷與每日最小冷負荷進行分析；最後，與實測數據進行對比，二者曲線基本符合，效果良好，證明所建模型適當。
  19. For example, the quenching and quenching plus low tempered structure of 38crmoal are hard to be differentiated by velocity method and the principal frequency technique. it will be better if they are differentiated by the method of relative attenuation coefficient

    38crmoal鋼的淬火與淬火+低溫回火組織，用聲速法和主頻率比較法都難以區分，最好的方法是比較功率譜譜峰特徵（幅度、數量、分佈） 。
  20. Parametric bit allocation technique in audio compression coding

    音頻壓縮編碼中的參數比特分配技術
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