low frequency range 中文意思是什麼

low frequency range 解釋
低頻波段
  • low : adj 1 低的；淺的，矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • 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。
  • range : vt 1 排列；整理（頭發等）。2 使歸類[班、行、隊]；把…分類。3 〈用被動形或反身形〉加入，站住…的一邊...
  1. Chaotic switching modulations introduce low - frequency harmonic spectrum of output voltage as random switching modulation. in some case, low - frequency noise ripple offset the effect chaotic switching modulations reduce the level of emi. it indicates that the ccfmfd integrates the advantages of spreading harmonic power at the multiples of the switching frequency and not introducing significant noise ripple at low - frequency range. among all chaotic switching modulations, the ccfmfd is considered as the best choice in applying to dc / dc converter

    與隨機調制模式相同，混沌開關調制模式也引入輸出低頻噪聲紋波，有些情況下低頻噪聲紋波可能抵消混沌開關調制降低emi水平的效果。分析表明： ccfmfd模式具有較好的降低emi水平和引入較小低頻紋波的優點，可以作為混沌調制模式較佳的選擇。
  2. Furthermore, the range of measurement of it was pointed out. all the analysis shows that our crsi 1il can be used to measure the spatial mid and low frequency wavefront distortion. 5. based on our crsi and algorithm, the phase modulation characteristic of an lcslm was measured

    五、利用環路徑向剪切干涉儀共光路、雙光束干涉的特點，全場準確測量了液晶空間光調制器的位相調制特性，並且利用它的位相調制特性實現了臺階位相板畸變波前的補償，由此證明了液晶空間光調制器可用於控制波前畸變。
  3. Proved with the mixing rate using parameters tw and r ^ it showed that large amplitude and high frequency could greatly enhance the mixing rate. but at large st, the rate of attenuation appears to be in periodic fluctuation at the range of low frequency, so there must be some best partnership of amplitude and frequency

    用參數t _ w 、 r _ （ 15 ）表徵的混合效率表明：總的來說大振幅、高頻率有利於混合，但在st較大的低頻率區中衰減速度會有周期波動的特性，存在最佳的頻率振幅配對。
  4. The main purpose of this study is to simulation a random fluctuation of wind velocity fitted to specified power spectrum in low frequency range in our wind tunnel

    本文研究的目的是在風洞中模擬風速隨機波動的陣風，這個基礎性工作對于開展風洞中的其它研究有著重要意義。
  5. Test method for small - signal scattering parameters of low - power transistors in the 0. 2 to 2. 0 - ghz frequency range

    在0 . 2至2 . 0千兆赫頻率范圍內小功率晶體管的小信號散射參數的試驗方法
  6. Computation and analysis of low - frequency compact range

    緊縮場低頻性能的計算與分析
  7. This system employed a new concept for measuring upper winds, viz. use of vlf very low frequency in the range of 10 - 13 khz signals from a global navigational network, omega, for computing the wind

    與以往無線電相比，該系統在測風方面則採用了一種新的概念，利用世界性奧米茄導航站網的甚低頻信號10 - 13khz來計算出高空風向和風速，無需用雷達追蹤探空儀位置。
  8. Measurement of pressure, temperature and humidity operated in much the same principle as the older version of radiosonde, but computation of wind was made use of the vlf ( very low frequency in the range of 10 - 13 khz ) signals of a world - wide navigational network, omega

    該系統量度高空氣壓、氣溫及濕度的方法與舊式無線電探空儀大致相同，但在測風方面則採用了一種新的概念，利用世界性奧米茄導航站網的甚低頻信號（ 10 - 13khz ）來計算出高空風向和風速，無需用雷達追蹤探空儀位置。
  9. They range from the high amplitude, low frequency delta to the low amplitude, high frequency beta

    范圍為高振幅，低頻率（德耳塔）到低振幅，高頻率（貝它） 。
  10. Low frequencies are related to the random property of soil rupture, whereas random vibration frequencies of the tractor - implement system are shown in the high frequency range

    研究結果表明：低頻力與土壤振動裂縫等隨機因素有關，而高頻力則是由於拖拉機鼠道犁機組的振動引起的。
  11. Compared with the similar research results, the weighted control ic here has the following characteristics : ( 1 ) the circuit structure is simpler ; ( 2 ) the chip ' s fabrication is compatible with standard cmos process ; ( 3 ) n - mosfets with high w / l ratio and short channels are used for weighting and output to reduce the insertion loss ; ( 4 ) the weighting factor varies in a relatively wide range with the controlling signals ; ( 5 ) input and output impedance approach 50 in low frequency ( e. g. 50mhz ), while in higher frequency they slightly deviate from 50, hence the energy reflection lower than 0. 1 ; ( 6 ) it completes the functions of sampling, weighting, controlling and summing of high frequency analog signals

    它的加權控制電路與已報道的相關電路相比具有如下特點：電路結構簡單；製造工藝與普通cmos工藝兼容：短溝道，高寬長比的nmos晶體管具有低的通導電阻，將其作為加權、輸出器件可降低由電路引起的插入損耗；改變加權信號，可實現權值在較大范圍內的連續變化；輸入、輸出阻抗在低頻（如50mhz ）下接近50 ，而在高頻下略有偏離50 ，但反射系數均低於0 . 1 ；實現了對高頻信號的取樣、加權、控制、疊加功能的迭加。
  12. Signalling on low - voltage electrical installations in the frequency range 3 khz to 148. 5 khz - low voltage decoupling filters - generic specification

    頻率范圍3khz至148 . 5khz的低壓電氣設備信號傳輸.低壓退耦過濾器.總規范
  13. Signalling on low - voltage electrical installations in the frequency range 3 khz to 148, 5 khz - low voltage decoupling filters - phase coulper

    頻率范圍為3khz至148 . 5khz的低壓電氣設備的信號傳輸.低壓退耦濾波器.相位耦合器
  14. Signalling on low - voltage electrical installations in the frequency range 3 khz to 148, 5 khz - part 4 - 6 : low voltage decoupling filters - phase coupler

    頻率范圍由3khz至148 . 5khz的低壓電氣設備的信號傳輸.第4 - 6部分:低壓退耦過濾器.相位耦合器
  15. Jump of forced vibration amplitude of a loudspeaker driven by stable galvanic source in low frequency range

    恆流源驅動下的揚聲器低頻跳躍
  16. Compared with quasi - resonant, it can reduced transistor voltage stress and improved load range and stability in low frequency range. because of the structure of three - level, transistor voltage stress and filter can be reduced significantly

    與傳統的準諧振變換器相比，該變換器功率器件的電壓應力大大降低，在很窄的開關頻率變化范圍內實現寬負載范圍的軟開關。
  17. Based on our two - dimensional approximate theoretical analysis, a transfer function model of the acoustic characteristics of underwater anechoic coating with various backings is established on the low - frequency range

    摘要在吸聲覆蓋層水聲聲管測試的實驗研究中，覆蓋層背襯的選擇對測量結果有重大影響。
  18. The arcs representing grain interior conduction mechanisms appear on all complex impedance plots, and occur at high frequency rang and contract with temperature. however, those arcs representing grain boundary and occurring at low frequency range were observed only in a small number of experimental runs

    而反映顆粒邊界導電機制的阻抗弧並不明顯，兩種阻抗弧出現在不同的頻率范圍內，反映顆粒內部導電機制的阻抗弧出現在頻率較高的范圍內，而反映顆粒邊界導電機制的阻抗弧出現在頻率相對低的范圍內。
  19. Low frequency range

    低通頻率范圍
  20. Our national capacitance metrology level in the low frequency range ( below 10 khz ) has reached the international advanced level. but with the development of science and technology, there exists a big difference between our national and international advanced level in the aspect of the frequency range and the capacitance range etc, especially in the aspect of the frequency range. so the capacitance metrology technology in high frequency cannot meet the need of testing for impedance metrology standards and the measurement instruments

    在低頻段（ 10khz以下） ，我國電容計量水平已達到國際先進，但隨著科技的發展，在頻率范圍、量值范圍等方面與國際先進水平有較大的差距，特別是在頻率范圍方面，不能滿足進口阻抗計量標準器及其測量儀器的檢定測試要求，迫切需要在頻率范圍上進行擴展。
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