domain sampling 中文意思是什麼
domain sampling
解釋
范疇內抽樣-
This article discussed ar modeling method, capon method, music method and mn method four kinds of high resolution algorithms principle and has separately made the computer simulation in the ideal situation to the above four algorithms. through the comparison, the beam width of high resolution algorithm is much narrower than conventional beamforming method. then unifies the actual utilization, discussed the influence of time delay unbalance, time domain sampling, plane wave supposition and array element with scope and phase not identically to the beamforming and made the computer simulation
本文首先討論了ar模型法、 capon法、 music法和mn法四種高解析度演算法的原理，在理想的情況下分別對上述四種演算法作了計算機模擬，通過比較，高解析度演算法的束寬比常規波束形成法窄得多;然後結合實際運用時的情況，重點探討了延時失配、時域抽樣、平面波假設和基陣的幅相不一致對波束形成的影響並做了計算機模擬。 -
High - speed random sampling of high - speed digitizing storage oscilloscope is discussed in this thesis and which are mainly analysed in the time - domain and the frequency - domain
本課題研究對象是高速數字存儲示波器的高速隨機取樣變換技術。主要從頻域和時域兩個方面加以分析論述。 -
On the basis of high speed hybrid filter banks adc system, a kind of downsampler model based on bandpass sampling theorem is presented, and analyzed, proved in time and frequency domain, in addition a downsampler is designed according to the model. a class of high effective hybrid filter banks adc system which bases on the downsampler and radio frequency spectrum is proposed, of which digital signal rate falls m times as fast as the former
作者提出了一種基於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抽取器，進而根據無線電射頻信號頻譜的特點，提出了高效混合濾波器組adc系統，其數字信號輸出速率比高速混合濾波器組adc系統降低m - 1倍。 -
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。 -
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。 -
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。 -
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。 -
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。 -
Measurement of soil bulk density by time domain reflectometry combined with soil sampling
時域反射儀結合土鉆法測定土壤容重 -
Analyzed the signal of 3 - d spatio - temporal sampling in spatio - temporal domain and frequency domain, according as the base principle of sampling, adopted more - dots - marked method, gained random spatio - temporal sampling matrix of digital video signal, it proved that arithmetic is accurate and efficiency
在時空域和頻域上分析三維采樣的數字視頻流信號，以采樣矩陣方法為依據，採用多點標定方法，得到任意數字視頻流的時空采樣矩陣。計算機模擬實驗證明了該方法的正確性和可行性。 -
As a new type of time - frequency analysis media, it excels in its good localization character both in time domain and in frequency domain comparing with traditional fourier analysis. it changes its sampling steps to smaller and smaller so as to analyze high frequency part, focusing on any part of the object been analyzed. to some extent, wavelet analysis is called " math microscope "
作為一種新型的時頻分析方法，它優于傳統fourier變換的優點是在時域和頻域同時具有良好的局部化性質，可對高頻成分採用逐步精細的時域采樣步長，聚焦到對象的任意細節，因此被譽為「數學顯微鏡」 。 -
The beam width is stretched. the algorithm performance has the very big weaken. but the convention beamforming algorithm performance is stabler, time delay unbalance, time domain sampling, plane wave supposition and array element the influence which creates to it is not big
通過比較，高解析度演算法在考慮上述情況后，波束方向出現偏差，束寬被展寬，幅度有很大的衰減，性能明顯下降;而常規波束形成演算法的性能較穩定，延時失配、時域抽樣、平面波假設和基陣的幅相不一致對其造成的影響不大。 -
A uniformly sampling algorithm of three - dimensional segmented quadrilateral boundary domain and an uniformly distributed sampling point optimized method based on force equilibrium are presented. then on basis of the above researches, the smooth b - spline surface fitting is implemented
提出了一種空間四邊界區域的均勻采樣方法以及基於力平衡原理的采樣點均勻分佈優化方法，實現了三角網格模型的重新均勻采樣和參數化。 -
Frequency - domain error analysis of synchronous sampling realized by software
軟體實現同步采樣的頻域誤差分析 -
Based on the coherent reception theory of radio signals and the theory of digital signal processing, the effects of carrier frequency offset, sampling clock offset, and symbol timing offset on ofdm signals are exploited. a series of amendments and new algorithms is derived from the in being algorithms of guard interval based symbol timing and frequency offset estimation, frequency - domain frequency offset, sampling offset, and symbol timing offset estimation
以無線信號的相干接收和數字信號處理理論為基礎，就載波頻偏、采樣鐘偏差和符號定時偏差對ofdm信號的影響進行了分析，對基於保護間隔的符號定時與載波頻偏估計演算法和多種現有頻偏、采樣鐘與符號定時偏差的頻域估計演算法進行了研究，提出了一系列改進措施與新演算法。 -
It is followed by digital sampling, windowing, noise filtering, endpoint detection, time - domain vector and transform - domain vector
內容涉及語音信號的數字化、加窗處理、預加重濾波、端點檢測，及時域特徵向量和變換域特徵向量。 -
In the paper four usual transformations from s - domain to z - domain are introduced to show the superiority of the bilinear transformation in high - frequency applications. then a novel sc architecture is produced to finish a filter with a cutoff frequency of 17. 8mhz. the accurate bilinear result is reached by dual - rate sampling
文中介紹了四種常用的s域到z域的變換，說明雙線性變換在高頻應用的優點；然後，運用一種新穎的開關電容結構組成濾波器，通過雙采樣的原理導出準確的雙線性變換，其截止頻率達到17 . 8mhz 。 -
The virtual digital signal processing instrument is developed with vc + + 6. 0 and matlab 6. 0 in windows 98. the system has realized signal generator, signal ' s sampling and averaging function, signal ' s power spectral density and cross special density analysis, the design and application of digital filter, signal analysis in time, frequency and inverted frequency domain
該系統的工作環境為windows98 ，開發工具為visualc + + 6 . 0和matlab6 . 0 。實現了波形發生器的設計、信號採集及平均處理、濾波器的設計及應用、信號的時域、頻域以及倒頻域分析。 -
The delta operator is introduced to the h9 filter problem of discrete system, which is significant for the anti - disturbance of the high - speed sampled system. in the delta domain system, the coefficient of the gain matrix of the estimator is approaching to that of the continuous - time system. which not only guarantees the stability and the performance of the system but also avoids the also avoids the defects the z domain when the sampling periods is approaching to zero
濾波問題中，這對于高速采樣系統的抗干擾及狀態估計具有很大的理論及實際意義，當采樣周期趨近於零時，估計器的反饋增益矩陣及閉環極點趨近於連續系統的反饋增益矩陣及閉環極點，從而可以採用離散的設計方法獲得連續系統的性能，既保證了系統的性能及穩定性，又避免了z域內設計的缺點。 -
For the delta domain systems with the discrete systems, we analyze and design the hx controllers using lyapunov stability theory. the results contain the sampling period and show that when sampling period is decreasing to zero the system is stable all the same while the performance of the discrete - time system is approaching to the continuous - time system
針對delta域內的離散定常系統，本文採用統一的李亞普諾夫第二穩定方法，對其進行了h _狀態反饋分析和設計，結論得到一個含有采樣周期的線性矩陣不等式，當采樣周期趨近於零時，系統仍然穩定，離散系統的性能趨于連續系統。
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