frequency-sampling 中文意思是什麼

frequency-sampling 解釋
頻率取樣
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  • sampling : n. 1. 取樣（品），取標（本）〈指行動或程序〉。2. 樣品，標本。3. 剽竊拼湊歌曲。
  1. The signal we named it fundamental wave ; according to the fundamental wave, coefficients of the fundamental wave can be lined in a sequence. when the unique of the dissolve of the fundamental wave can be confirmed, the sequence of the coefficients can be regarded as one of representation forms of the signal itself ; theory of dissolvable signal shows that when order of the matrix of fundamental wave sampling equals to number of fundamental waves, the sequence of the sampling values from sampling points must be matched one by one with the sequence of the coefficients of fundamental waves. the sampling composed by sequences of the sampling values must be full sampling ; the relevant deductions of the theory of dissolvable signal shows that when sampling the signal, sampling frequency must be lager than the ratio of the number of fundamental waves to the occupation time of the fundamental waves ; to band - limited signals, when the fundamental wave is a sine signal, the results from the relevant deductions of theory of dissolvable signal is coherent to the classic sampling theory

    本文通過分析認為，當信號集中的任一信號可表示為一系列已知信號的線性代數和時，信號集便構成可分解信號集，已知信號稱為基波信號；對可分解信號而言，基波系數構成一序列，當對指定的基波信號集分解唯一確定時，系數序列本身便是信號的一個表示；可分解信號采樣定理指出當基波樣值矩陣的秩等於基波數時，則由采樣點處的采樣樣構成的樣值序列必與基波系數序列一一對應，從而由該樣值序列構成的采樣必為完全采樣；可分解信號采樣定理中的推論指出，對信號集進行采樣，采樣頻率必須大於其信號分解的基波數與其對應時長之比；對有限帶寬信號，若基波信號為正弦信號時，由可分解信號采樣定理推論給出的結論與經典采樣定理一致。
  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. The materials as explant in transformation come from birch leaf, stem segment and leaf stalk, and the spider toxin gene was used as foreign gene for this transformation experiment. it showed that the best explant was the big leaf, on which the transformation frequency was 22 %. by gus detection, there were 43 percent of the plants with kanamycin resistance, and 100 percent of positive result, by pcr amplification, was gotten from random sampling

    利用雙元載體的根癌農桿菌lba4404菌株（ agrobacteriumtumefaciens ） ，含質粒pyhy （目的基因及npt 、 gus基因） ，對白樺試管苗莖段，葉柄，葉片三種外植體進行侵染，結果表明：大葉片生長勢強，為轉基因的最優外植體，轉化率能夠達到22 。
  4. The research results show that the influence of sampling frequency, sampling error of peak value, strobe - position and strobe - width on fft and ifft is obvious

    研究發現，超聲信號的采樣頻率、采樣特徵點、閘門位置及閘門寬度對超聲信號的fft及ifft結果有明顯的影響。
  5. Research on infrared image reconstruction simulation with equal row frequency sampling

    等行頻采樣方式下的紅外圖像幀重建模擬研究
  6. Quantization error analysis in the high speed and high precision frequency sampling

    高精度頻率采樣中的量化誤差分析
  7. Abstract : a new current feedback control method of brushless dc motor ( bldcm ) is introduced in this paper, which combines the traditional overlap method with the fixed - frequency sampling current control method. it both stabilizes the work frequency of the inverter, and improves the commutative performance of bldcm. and it is verified by the result of the simulation

    文摘:提出一種永磁無刷直流電機電流反饋新的控制方法，即採用常規重疊換相法與定頻采樣電流控制相結合的方法，既能穩定逆變器的工作頻率，又改善了永磁無刷直流電機的換相性能，利用模擬對提出的方法進行了驗證。
  8. The article also includes the work as follows : 1. finished designing the hardware collective circuit and its controlling program, and using the dissynchronous fifo technique and independent clock circuit to solve the problem of high - accuracy regular - frequency sampling and the match system speed

    論文還完成了以下工作： 1設計現場診斷儀的硬體採集電路及相應控製程序。應用異步fifo技術和獨立時鐘電路，解決了高精度定頻率采樣以及系統速度匹配問題。
  9. This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits

    本文採用了一種基於fpga的通用數字調制解調方案，該方案在調制端採用了正交平衡調制技術，在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術，直接在中頻上進行數字信號處理，不需要進行下變頻，也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。
  10. In this thesis, some traditional methods are introduced, such as, window method and frequency sampling method

    本文介紹了一些傳統的方法，如窗函數法、頻率采樣法。
  11. This cpld based on - site monitoring data acquisition card can flexibly realize 3 triggering ways, including software triggering, hardware triggering and external triggering. in addition, this card can also realize optional 128 or 256 signal multiple frequency sampling. the fifo module in cpld ' s inner eabs ( embed array blocks ) further lead to the convenience of data saving and loading

    由於引入了cpld的控制技術，使數據採集卡的工作方式更靈活，可實現3種觸發方式的任意選擇，包括軟體觸發，硬體觸發和外部觸發；采樣率可控制，可選擇128或256信號倍頻；由於cpld內部有eab模塊，可實現內部fif0 ，使數據的存取更為方便。
  12. Except the simple and usual filter and algorithm, some advanced filter ways such as frequency sampling filter, karlman filter and several new algorithms such as cosine algorithm, semiwave fourier algorithm and wavelet transform algorithm are also studied

    除簡單、常見的濾波和演算法外，本章還探討了一些性能先進的濾波方法如頻率抽樣濾波、卡爾漫濾波和幾種微機保護新演算法如餘弦演算法、半波傅氏演算法以及小波變換演算法等。
  13. This paper presented a ml estimator for the estimation of high - frequency sampling noise model to solve the problem that high - frequency sampling suffer from both additive noise and time jitter error estimation

    摘要針對高頻數字采樣中的附加噪聲和時間抖動誤差估計問題，給出了高頻數字采樣測量噪聲誤差的最大似然估計方法。
  14. Application in ds cdma digital receiverbasing on frequency sampling theorem

    信號數字接收中的應用
  15. Fir filter design : frequency sampling technique based on genetic algorithm

    基於遺傳演算法的頻率采樣技術
  16. A sort of digital reconnaissance receiver based on multi - signal direct intermediate frequency sampling

    的直接中頻采樣數字接收機設計
  17. In signal processing, second - generation enhanced intermediate frequency sampling speed and signal processing speed and capacity

    在信號處理方面，第二代提高了中頻采樣速度，並加強了信號處理的速度和能力。
  18. Software radio receiver system based on direct mid - frequency sampling, which is researched in this paper, is one of the feasible software radio system nowadays

    本文研究的直接中頻采樣軟體無線電接收機系統就是軟體無線電系統一種現階段可行的方案。
  19. The theory analysis and emulation research prove that software radio receiver based on direct mid - frequency sampling is feasible, and possesses the strong flexibility and expansibility

    理論分析和模擬研究表明直接中頻采樣軟體無線電接收機是可行的，而武漢理工大學碩士學位論文且具有很強的靈活性，可擴展性。
  20. In the meantime, the paper introducted the method of fixed - frequency sampling in combination with commutation method by overlap in order to hold back the torque ripple of bldcm

    論文主要研究了兩相和三相無位置傳感器永磁無刷直流電機由電流換相引起的轉矩波動，推導出相應的轉矩波動公式，提出一種採用定頻采樣和重疊換相相結合的方法對換相轉矩波動進行抑制和控制。
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