frequency center 中文意思是什麼

frequency center 解釋
頻度中心
  • 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。
  • center : n vt vi 〈美國〉＝centre n 1 中心；中心點；圓心；中央；中樞，核心；中心人物；根源，起源。2 〈常C ...
  1. △w is the radian frequency deviation from the center frequency.

    W是角頻率與中心頻率的偏離值。
  2. The frequency respond to : the brief name rings, and measure a device right high, the inside, frequency for ability for even emersion of signal, general enlarger of low and each segment respond to and should attain the the. ear that excluding the person is out of hearinged, but skin etc. the other sensory apparatus it can feel. for example thunder, the frequency of the thunder voice is low, person ear can hear few, but we can feel the fierce vehemence of that kind of manner, and can have to grow the center of chest however spirit felling that come. this make the perfect new of science spirit, summer that re - appear of orotund details the the dollar of superior quality adoption the for piece with careful electric circuit designing, frequency scope attaining the the, can like this satisfying broadcasting the true of this new and high of of or of ring the request

    以外人的耳朵聽不到了，但是皮膚等其它感覺器官能感覺到。例如打雷時，雷聲的頻率比較低，人耳所能聽到的很少，但我們能感覺到那種來勢兇猛的氣勢，會有種胸口透不過氣來的感覺。本著使聲音細節完美重現的科學精神，夏新採用優質的元器件和嚴謹的電路設計，頻率范圍達到，這樣就能夠滿足播放或這類新型高保真音源的頻響要求。
  3. In current practice, array parameters are usually calculated according to the strength and types of interference wave, frequency characteristics, and azimuth, whereas the effect of array center is often ignored, and simply view the graphic center as array center

    指出現在施工設計中，組合參數的確定主要圍繞干擾波、頻率特性和方位角等方面進行論證，忽視了其組合中心的確定。
  4. Standard deviation in statistics, a measure of the dispersion of a frequency distribution : it is the average magnitude of deviations from the center of normal curve, calculated by squaring all the deviations, calculating their mean, then finding the square root of the mean

    標準偏差：統計中，一種衡量數據組分佈的分散或變化情況的數據，是偏離正態分佈中間位置數據大小的平均值。
  5. Transmit channel center frequency

    發射通道中心頻率
  6. Center frequency range

    中心頻率范圍
  7. The center frequency of the vco is 28. 8ghz and the band width is about 20 mhz

    經過測試，得到振蕩頻率為28 . 8ghz ，調頻帶寬20mhz ，與期望結果相差較大。
  8. The analysis on the relationship of the center frequency deviation and the microstrip open - end effect is given

    同時分析了導致這種偏移的原因，並闡述了該方法的理論基礎。
  9. Both fine and coarse center frequency controls, combined with a scanwidth selector provide simple frequency domain measurements from 100 khz div

    中心頻率控制有微調和粗調，掃頻寬度選擇從
  10. The following is a partial list of lc lowpass filters and their specifications that we have produced, arranged by center frequency

    以下為生產過的lc低通濾波器部分產品規格（按截止頻率排序） 。
  11. The center frequency of the vco is 14. 14ghz with band width of more than 100mhz. the output power is 2 ~ 6mw

    根據測試結果，該vco電路的中心頻率為14 . 14ghz ，調頻帶寬大於100mhz ，帶內輸出功率在2 6mw之間。
  12. These conclusions are important for choosing suitable radar system parameters such as center frequency, resolution and imaging squint angle in engineering design

    這些結論對工程設計牛選擇合適的工作參數，如載頻、解析度、成像斜角等具有較為重要的參考價值。
  13. The special relationship among signal bandwidth, center frequency and imaging squint angle in the range - doppler imaging algorithm and other methods is also presented in the chapter 3

    本章通過分析提出了距離多普勒等成像方法中信號帶寬、工作頻率和成像斜角之間存在的特定關系。
  14. This dissertation mainly researches the displaced phase center antenna ( dpca ) technique in the new system, and the contributions are calculated as following : 1. the doppler history is analyzed for the spaceborne bistatic sar, doppler center frequency and doppler fm rate computational methods are studied. summing up is done for the methods of moving target detection and imaging

    本文完成的主要工作有: 1 .分析慢速運動目標信號特徵以及運動目標對sar成像的影響（多普勒中心頻率，多普勒斜率以及距離徙動誤差） ，總結了目前sar運動目標檢測與成像的主要方法。
  15. 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。
  16. By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it, the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step. while the electronically tuned filter abates the image interference and notably improves the selectivity. the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper

    課題中所採用的pll或dds pll鎖相頻率合成方法充分發揮鎖相環良好的窄帶跟蹤濾波特性，並結合dds的高頻率解析度、高頻率精確度和高速頻率捷變等優點，分別實現了系統所要求的高質量寬帶本振源和小步長頻率捷變；採用電調諧選頻技術，則大大改善了接收機的選擇性和抗干擾能力。
  17. Compared with non - slung - load flight, additional aerodynamic load, gravity load should be considered in the slung - load system. so the moment to the gravity center, flight mode and the natural frequency will change

    直升機吊掛飛行，與直升機非吊掛飛行狀態相比，增加了新的氣動載荷、重力載荷，和因此產生的對直升機重心的力矩，其飛行運動模式、低頻振蕩固有頻率均發生改變。
  18. Vvvf door controller frequency converter makes lift door installation easier and more convenient as its control center is the internationally advanced engineering 16 digital micro computer and it operates with the fully digital spwm modulation techniques, with igbt module as the output power drive and with voltage, current and speed under fully digital closed circuit control ( the door controller ' s operation parameters are inputted by means of the keyboard )

    Vvvf控制門機變頻器採用當今國際上先進的工控16位微型計算機為控制核心，採用了全數字spwm調制技術， igbt模塊作輸出功率驅動，電壓、電流、速度全數字閉環控制（門機的運行參數均可通過鍵盤設置輸入） ，從而，使門機的安裝調試更加簡單，方便。
  19. Accompanying power system reformation, chongqing power network will be merged into the middle china power network. according to national " power attempt communicating center assessing measure, chongqing power network modulates not only network frequency but also the power of chuan yu - the middle china network alliance line

    伴隨著電力體制改革的推進，重慶電網即將併入華中電網，按照國家電力調度通信中心頒發的考核辦法，重慶電網既要承擔調整電網頻率的任務，又要承擔調整川渝?華中電網聯絡線功率的任務。
  20. In this paper, the evolution equations of the parameters of the optical soliton pulses were derived by means of variational method, in order to investigate the influence of the fifth - order nonlinear effect on the transmission properties of optical soliton in the coupling fiber, and the effects of the fifth - order nonlinearity were discussed on amplitude, frequency band width, chirp, frequency, center position and phase

    摘要運用變分法導出五階非線性作用下孤子的參數演化方程組，研究五階非線性耦合光纖中孤子的傳輸特性，討論五階非線性效應對孤子的振幅，頻寬，啁啾，頻率，中心位置及相位的影響。
分享友人
分享到 Line

分享到臉書