頻率取樣 的英文怎麼說

中文拼音 [bīnlǜqǔyàng]
頻率取樣 英文
frequency-sampling
  • 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...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 取 : Ⅰ動詞1 （拿到身邊） take; get; fetch 2 （得到; 招致） aim at; seek 3 （採取; 選取） adopt; assume...
  • 樣 : Ⅰ名詞1. （形狀） appearance; shape 2. （樣品） sample; model; pattern Ⅱ量詞（表示事物的種類） kind; type
  • 頻率 : frequency; rate
  1. The experiment apparatus has been developed, which is based on software ( labview ) and hardware ( pci board ni 6024e ). the displacements and generative force at the tip of the ipmc actuators were measured with respect to the different voltages, frequents and various waveforms which include square, sinusoidal, and triangular wave

    實驗選取了不同電壓幅值，不同頻率的方波、三角波、正弦波三種波形作為電激勵信號，利用高速攝像記錄ipmc的位移變形，並通過力傳感器實測了ipmc試樣末端的輸出力。
  2. A 3rd generation converter samples the signal 44, 100 times per second - with a frequency of 44. 1 khz kilohertz. this time resolution exceedingly determines the sound, which we finally perceive : a low resolution sampling or sample rate results in a more muffled sound because quickly oscillating sound waves i. e. high tone are not acquired correctly

    讀取頻率，也就是聲音的采樣頻率，的高低直接影響到我們最後所聽到的聲音，如果采樣頻率不夠高，聽到的聲音會感覺有點糊糊的暗暗的，因為沒有辦法讀取到某些振蕩頻率較高的聲波，也就是高音的部分。
  3. Code this control code of the recording s bit inside of the 16 the instruction to tell to put in the hdcd in the cd hdcd in the phonograph solution code, is central plains the number this of the high of that short restores out. like this, hdcd can in the cd of 44. 1 orotund number that khzs sampling frequency extreme limit inside, exceed the bandwidth 20 khzs re - appeared out

    在hdcd編碼錄音的第16bit中的這個控制代碼指令告訴放在cd唱機中的hdcd解碼器，把訊號中原本的那個短促的陡高音還原出來。這樣， hdcd就能夠在cd的44 . 1khz的取樣頻率極限內，把頻寬超過20khz的聲音訊號重現出來了。
  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. With an s pdif port providing interference - free links to digital gear, the device plays digital audio back at resolutions as high as 192 solution khz

    藉由s pdif介面可與數位設備進行無干擾的數位傳輸，這個裝置可播放高達192khz取樣率的數位音頻。
  6. The data processing system includes a data receiving means for receiving a plurality of input data sampled at a first frequency

    此資料處理系統包含一個資料接受裝置，用來接受以第一個取樣頻率所取樣出的一組資料。
  7. Test samples shall be taken on the site and tested at the frequencies specified in the applicable prc standards

    試件應從工地現場取樣，測試的頻率以中華人民共和國現行標準為準。
  8. Because of the using of interpolation, noise shaping and switching amplification in the digital audio amplifier technology, the power supply modulator is not only much efficient but also behaving good in envelope amplification, this advantage is hard to implemented with conventional technology

    數字音頻功放技術是近年發展起來的高效率音頻放大技術，該放大技術採用了過取樣、噪聲整形等數字音頻處理演算法和開關功率放大。採用該技術實現的電源調制器不但具備很高的效率，而且能高指標地放大包絡信號，是常規的電源調制技術無法實現的。
  9. In this paper, a ku band frequency source based on sampling phase lock loop technique is introduced. the vco of the loop is designed using dielectric resonator. the theory and design method is discussed and emphasized on

    本文介紹了一個應用取樣鑒相和鎖相原理製作的微波ku波段頻率源（頻率合成器） ，其中的壓控振蕩器部分是用介質諧振器（ dr ）設計的。
  10. This paper simulates the effect of voltage fluctuation inspection through the tool of matlab. and proves the filters ' s stability. in the part of self - checkout, pi ( proportional integral ) control arithmetic is put forward to check the gain k and the calculated results show the method ' s effectiveness. then many comparements toward pst are done in different realization methods such as different interpolation points classification number and sample frequency. though simulation and calculation we can see the designed flicermeter can meet our country ' s standands

    文中利用matlab對電壓波動的檢測效果進行了模擬；並對涉及到的濾波器的穩定性做了證明；在自校驗部分提出了將pi （比例、積分）演算法用於數字濾波器增益k值的確定，取得了不錯的效果；然後分別從取不同插值點、不同分級數和不同采樣頻率這幾個方面出發，對計算出的p _ （ st ）值進行了比較。
  11. The bottleneck of hybrid filter banks adc system is that it cannot sample directly higher radio frequency signal because of lower analog input bandwidth of its adc. in order to remove it, a kind of downsampler model based on nyquist and bandpass sampling theorem is presented, analyzed and proved in time and frequency domain, in addition a downsampler is designed according to the model. on the basis of hybrid filter banks adc system, a class of high speed hybrid filter banks adc system is proposed

    針對混合濾波器組adc系統因其adc模擬輸入帶寬低而不能對頻率較高的射頻模擬信號進行模/數轉換的瓶頸，作者提出了一種基於nyquist采樣定理和帶通采樣定理的抽取器數學模型，對該數學模型進行了時域、頻域的分析證明后，設計了一種基於該數學模型的sha抽取器，進而在混合濾波器組adc系統的基礎上，提出了高速混合濾波器組adc系統。
  12. This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

    本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。
  13. 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。
  14. The present invention teaches a data processing system capable of per forming a sampling frequency conversion

    本發明系提供一個資料處理系統，能夠執行一個取樣頻率轉換。
  15. The data processing system further includes a discrete transforming means for performing a discrete transform on the input data at the first sampled frequency for trans forming the input data to a discrete function in a second - variable - domain at the first sampling frequency

    此資料處理系統也包含一個離散轉換裝置，用來對以第一個取樣頻率所取樣的輸入資料作離散轉換，也就是將輸入資料轉換成以第二個取樣頻率為頻率及第二個變數為定義領域的離散函數。
  16. The data processing system further includes a convoluted inverse transforming means for inversely transforming the discrete function in a second - variable - domain back to the time domain at a second sampling frequency for converting t he input data to a set corresponding data sampled at the second sampling frequency

    此資料處理系統也包含一個旋積的逆轉換裝置，用來對以第二個變數為定義領域的離散函數，逆轉換回以第二個取樣頻率為頻率及以時間為定義領域的函數，也就是將資料轉換成以第二個取樣頻率所取樣的資料。
  17. The following algorithms have been proposed and tested in the thesis : 1 frequency selective fading : combine the isomorphism between the input space and the output space and propose a new approach to blind equalization of the channel. compared with conventional methods, the new approach offers lower computational complexity, better performance, and more robust against the over - determination of the system order ; 2 time selective fading : a new approach to the equalization of time selective channel based on the zero - forced equalizer is proposed which is more simple in its structure of algorithm ; 3 time - varying channel : using the instantaneous mean value changes of the output signal to extract the information of channel variations and model it using ar model, kalman filter is then employed to track channel variations, it bears faster ability in tracking the variation of tv channels ; based on the isomorphism between the inputs and the outputs and some of the approaches using in mimo system, a new algorithm of equalization of simo time - varying channel is proposed, which also share the merits of being robust against the over - determination of the system order ; model the time - varying channel using the multi - resolution decomposition wavelets, and then a blind identification method based " on the model is proposed ; at last, a new model for equalization and identification of mimo system is proposed

    主要工作在以下幾個方面： 1 、針對頻率選擇性衰落通道：結合輸入輸出空間同構關系提出一種新的頻率選擇性通道均衡方法，與傳統方法相比，該方法計算量更小，收斂速度更快，性能更優，且對系統階次的過確定表現穩健，具有實際均衡應用價值； 2 、針對時間選擇性衰落通道：提出一種基於迫零均衡的時間選擇性通道均衡方法，演算法結構簡單； 3 、針對時變色散通道：利用瞬態均值曲線提取通道時變信息，對之ar建模，利用卡爾曼濾波器跟蹤時變通道抽頭變化，可以快速跟蹤通道變化；基於輸入輸出空間之間的同構關系以及多輸入多輸出系統的處理方法，提出了新的單輸入多輸出色散時變通道均衡與識別演算法，同樣具有對通道階次過確定保持穩健的優點；結合小波多解析度分析提出一種基於小波模型的通道盲識別演算法；研究時變的多輸入多輸出系統的盲均衡與盲反卷積問題，給出一種時變系統處理模型。
  18. From theoretical analysis, we know the existing demodulation methods have limitations as following : one is that the subtraction of the two signals frequencies will display as the result of demodulation when we demodulate two time - domain adding signals without modulating information ( fault information ) ; the other one is that aliasing phenomenon will occur as a result of getting absolute value, detection or square in the process of generalized demodulation analysis, such phenomenon will result in some superfluous frequency composition on the frequency spectrum, which will puzzle the detec tion of mechanical vibration. if the sampling frequency is selected from a suitable range, the aliasing phenomenon will be avoided ; the last one is that aliasing frequencies will be produced in zoom demodulation analysis because this algorithm cannot employ digital low - pass filtering to avert the folding frequencies of higher harmonics in the process of zoom sub - sampling

    現有的解調分析方法存在以下三種局限性：將不包括調制信息（故障信息）的兩時域相加信號，也以其頻率之差作為解調信號而解出；廣義檢波濾波解調分析中，由於取絕對值、檢波或平方過程可能產生混頻效應，在解調譜中表現為無法分析的頻率成分，並由此推導出避免這種混頻現象的采樣頻率的選取范圍，從根本上避免此類誤診斷的產生；幾種細化解調分析新演算法中，因為無法在細化分析的選抽時進行數字低通濾波，有可能會出現調制頻率的高次諧波成分發生頻率混疊而反折到低頻部分的現象。
  19. In the time - domain, based on the principle of random sampling of dso. two way ( " time amplifing in dual slope integral " and " time - voltage convert " ) are implemented to measure the time between the system triger and writing clock. thus random sampling interpolate can be done to measure repeated signal in high frequency with the a / d convert and controller which frequency are lower

    在時域，根據數字示波器隨機取樣原理，用兩種方法（雙斜率積分時間放大測量方法和時間? ?電壓轉換測量方法）測量數字示波器系統觸發和采樣寫時鐘間時間間隔，用低速a / d轉換器及控制器進行模?數轉換和控制，以此進行隨機取樣內插，從而實現了對高頻率重復信號的測量。
  20. An effect that occurs when a signal is sampled at a rate less than twice the highest frequency present in the signal. the subsequent signal recovered from the samples will not contain the high frequency component of the original signal and will display a false low frequency signal

    以低於信號中最高頻率兩倍的頻率進行信號取樣時出現的一種效應，即當由取樣狀態還原時，還原后的信號將不再含有原來信號中的高頻成分，並將顯示出虛假的低頻信號。
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