頻帶平均效率 的英文怎麼說

中文拼音 [bīndàipíngjūnxiào]
頻帶平均效率 英文
mean efficiency in a frequency band
  • : 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...
  • : Ⅰ形容詞1 (沒有高低凹凸 不頃斜) flat; level; even; smooth 2 (高度相同; 不相上下) on the same l...
  • : Ⅰ形容詞(均勻) equal; even Ⅱ副詞(都; 全) without exception; all
  • : Ⅰ名詞(效果; 功用) effect; efficiency; result Ⅱ動詞1 (仿效) imitate; follow the example of 2 ...
  • : 率名詞(比值) rate; ratio; proportion
  • 效率 : productiveness; efficiency; productivity; workpiece ratio
  1. 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。有限寬的濾波也不引起mnls孤子初始中心、初始位相的改變,選取適當的濾波器參數值能使孤子的穩定在初始的紅側一穩定值,抑制了自移,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孤子的穩定值更接近初始,更接近數值計算結果。
  2. According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d

    本文首先介紹了ld泵浦nd : yag激光器的發展狀況、主要特性及其應用,從四能級速方程出發,推導了ld泵浦nd : yag激光器的閾值、輸出功和斜的表達式,並簡述了激光器的工作原理、結構型式和倍方法;其次,以空間相關的速方程為基礎,提出了ld端面泵浦nd : yag激光器的設計方法,給出了一定泵浦耦合方式下,振蕩光模尺寸、最佳輸出耦合、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據,以此為依據,設計了自聚焦透鏡耦合小功ld泵浦nd : yag激光器和透鏡組耦合高功ld泵浦nd : yag激光器,對激光器的輸出功和功穩定性等特性進行了實驗研究;再次,在尾纖輸出的高功ld泵浦nd : yag激光腔內插入一隻空液晶盒,觀察到了激光器以單縱模運轉;最後,根據泵浦光焦斑端面位置對激光輸出功的影響規律,提出了ld端面泵浦nd : yag激光位移傳感新方法,並進行了理論和實驗研究,研究結果表明:當激光晶體內泵浦光光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時,激光輸出功的自然指數與泵浦光焦斑的縱向位置成高斯變化規律,測量范圍和靈敏度依賴于泵浦功,隨著泵浦功的增加,測量范圍擴大,靈敏度提高,當端面泵浦功為7 . 24w (最大輸出功為1 . 926w )時,激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。
  3. Using the order - up - to ( out ) method and two demand forecasting patterns, that are exponential smoothing forecasting and moving average forecasting, we give the frequency response plot and the noise bandwidth figure with the help of the system control tool of matlab. we show that information sharing helps to reduce the bullwhip effect, especially at higher levels in the chain. however, the bullwhip effect problem is not completely eliminated and it still increases as one moves up the chain

    本文的重點內容就是用控制論的理論和方法來研究牛鞭應,應用補充到目標庫存策略( out )和兩種不同的需求預測方法,即指數衡預測法和移動數預測法,用matlab的系統控制工具箱作為分析工具,分別給出了信息共享情況下和無信息共享情況下的響應圖和寬比較圖,證明了信息共享能夠減弱牛鞭應,尤其是在供應鏈的高級階段,但牛鞭應並不能完全消除,仍舊隨著供應鏈階段的上升而增加。
  4. At the operating voltage and current less than rated values, the amplifier provides a maximum of 5. 94 - w ( continuous wave ) output power when driven into saturation. the average combining efficiency over the operating band was estimated at 82 %. the maximum combining - efficiency and the overall power - added efficiency ( pae ) is 87 % and 13. 6 %, respectively

    該功合成放大器在低於mmics功單片額定工作值的情況下獲得了1 . 7ghz寬的最大飽和輸出功5 . 94w (連續波) ;整個內合成估計為82 % ,最大合成達87 % ,功相加( pae )約為13 . 6 % ;若電源達到mmics單片的額定值,估計最大輸出射將會達到7w 。
  5. Unlike pilots which are used for estimation of channel and must waste some useful bandwidth, the ppss, whose power can be boosted 3db or 6db to suppress efficiently the additive noise, is useful data transmitted, thus efficiency of the ofdm has been increased

    與用於做通道估計的導符號不同, ppss傳輸的是有用的數據,因此提高了系統的寬利用, ppss的增加3db或6db可有抑制通道的加性高斯噪聲。
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