降低噪聲系數 的英文怎麼說

中文拼音 [jiàngdīzàoshēngxìshǔ]
降低噪聲系數 英文
noise-reduction coefficient
  • 降 : 降動詞1. （投降） surrender; capitulate 2. （降伏） subdue; vanquish; tame
  • 噪 : 動詞1. （蟲或鳥叫） chirp 2. （大聲叫嚷） make noise; make an uproar; clamour
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 降低 : reduce; cut down; abate; debase; drop; lower; lessening; reducing; reduction; depression; tarnish
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. The results are useful to further research on torsional vibration of the vehicle drivetrain, reducing the yawp of starting and ameliorating the capability of torsional vibration

    為進一步分析車輛磨擦離合器接合階段傳動系的各個部分的參數對扭轉振動的影響、降低起步階段的噪聲、改進傳動系扭振性能具有一定的意義。
  2. The underwater - radio buoy for use as obtaining the ocean ' s acoustical parameters, applied for synthetic experimentations that seeing about ocean underwater acoustic environment, can obtain and memorize the data for all kind of underwater acoustic experimentations, for example, acoustic propagation, reverberation, ocean ' s noise etc. the system can not only reduce requires in quantity of using ships and scales in military strength equipment but also keep away from ships environments, reduce background noise and increase the quality of the gathered data

    海洋環境參數獲取浮標監測系統用於海洋水聲環境綜合考察試驗中，獲取和記錄水聲傳播試驗數據。該系統不但可以減小參試艦船數量要求，降低兵力配備規模，而且可以遠離艦船環境，降低背景噪聲，提高所採集數據的質量。因此，浮標的研製對于保證未來海試完成既定試驗目標、順利完成試驗項目具有重要意義。
  3. So, the emphases are put on this part. first, all sources of noise are analyzed and calculated to determine the parameter of component and estimate the feasibility of the system. second, on the one hand, low noise wideband and high gain amplifier is detailed particularly in the design of hardware, on the other hand, several mathematical methods are introduced to reduce the noise further in the design of software

    首先，詳細分析了整個系統的噪聲來源，計算可能出現的噪聲，在器件的選擇上對參數提出要求，並分析方案的可行性；其次，在硬體設計上，兼顧帶寬，噪聲與放大倍數；在軟體設計上，採用累加平均，最小二乘擬合等信號處理方法，進一步降低噪聲。
  4. 5 a multi - thread software cooperated with smp ( 2 cpu ) hardware performs the image - preprocessing correlation and post - processing synchronously, thus an automatic working module is realized. 6 systematic designed software, including grabing sarnies constructing rfl diging roi, and trainning ann offline and inline modules, has passed the practical tests which indicates that the opr could reach the recogniton possibility above 85 % and decrease the false alarm in the environment of high noise low contrast and multi - objects. and these are proved stable and repeatable in statistics, and so an advanced progress toward practical systems is achieved

    6 、系統化設計的軟體，包括了樣本採集、參考濾波器庫構成、相關平面的roi採集，以及ann脫機訓練、 ann聯機運行的軟體功能模塊，在實時運行的測試結果中表明了該opr系統對處于高噪聲、低反差、多目標的惡劣條件下，對三維畸變目標的判識率（ > 85 % ） ，降低了虛警率，並通過大量的實驗數據證明了該系統各項指標的穩定性和可重復性（從統計意義上講） ，向實用系統邁進了一大步。
  5. The result shows that average absorption coefficient and noise reduction coefficient separately equal to 0. 58 and 0. 60, and fine property of sound absorption at middle - low frequency

    結果表明材料的平均吸聲系數和降噪系數分別達0 . 58和0 . 60 ，且材料的中低頻吸聲性能優良。
  6. The simulated results show that we can improve the sensitivity by setting the optical bias at / 2, reducing the gap of electrode, increasing the overlap integral factor, reducing the insert lose, adopting suitable segmentation number, increasing the electrode length, increasing the optical power, reducing the wavelength and the relative intensity noise and reducing the receive bandwidth ; obtain the wider bandwidth utilizing reducing the electrode length and the capacitance of modulator, segmentation the electrode ; increase the dynamic range using lowering noise, increasing the optical power at the detector and lower optical bias

    通過計算得知，使傳感器相位偏置為/ 2 ，減小電極間距，提高電光重疊因子，減小器件插入損耗，採用合適的分段數，增加電極長度，增大光功率，降低激光的波長，減小相對強度噪聲，減小接收帶寬，對提高靈敏度的效果是非常明顯的。而減小天線長度，降低調制器電容，電極分段，都可以獲取較大的帶寬。降低系統噪聲;增加到達探測器的光功率，採用較低的光學偏置，都可以增大線性動態范圍。
  7. A new aerodynamic design system developed by authors for draft fan with enhanced efficiency, suppressed noise, enlarged flux and high load. the new design system features : a twist regulation for vortex control is employed in designing to lessen the secondary flow loss in the blade tip and hub ; the feasibility and high efficiency of this procedure has been verified by the tests of the prototype fan ; a new computer - aided 3d blading is used to optimize the blade ; numerical inverse checking is adopted to enhance accuracy in designing and cut down the period of the designing and production. this design system can make the optimized blade with " forward inclination ", " inclining sweep ", " bending sweep ", to minimize the various secondary flow losses, to expand the steady working range of the fan, and to suppress the aerodynamic noise source

    本文通過對一種新型高性能礦用局部通風機的設計、製造及試驗全過程的綜述，展現了新的先進設計體系在民用通風機上的成功運用，其研製特點是： （ 1 ）在葉片氣動設計中為了降低葉根及葉尖區二次流損失，採用可控渦扭向規律設計，樣機實測的高性能驗證了這種方法的可行性和高效性； （ 2 ）在設計方法中採用較精確的數值反驗算，獲取最優設計方案，大大提高設計的準確性和成功率，並縮短了設計試制周期； （ 3 ）在設計過程中發展了計算機輔助三維葉片造型新方法，可以根據設計需要簡便快捷地對葉片進行「前傾」 、 「傾掠」或「彎掠」造型，這些造型對減小各種二次流損失、擴大穩定工況范圍和控制葉輪機氣動噪聲源起到了非常好的作用。
  8. Abstract : a new aerodynamic design system developed by authors for draft fan with enhanced efficiency, suppressed noise, enlarged flux and high load. the new design system features : a twist regulation for vortex control is employed in designing to lessen the secondary flow loss in the blade tip and hub ; the feasibility and high efficiency of this procedure has been verified by the tests of the prototype fan ; a new computer - aided 3d blading is used to optimize the blade ; numerical inverse checking is adopted to enhance accuracy in designing and cut down the period of the designing and production. this design system can make the optimized blade with " forward inclination ", " inclining sweep ", " bending sweep ", to minimize the various secondary flow losses, to expand the steady working range of the fan, and to suppress the aerodynamic noise source

    文摘:本文通過對一種新型高性能礦用局部通風機的設計、製造及試驗全過程的綜述，展現了新的先進設計體系在民用通風機上的成功運用，其研製特點是： （ 1 ）在葉片氣動設計中為了降低葉根及葉尖區二次流損失，採用可控渦扭向規律設計，樣機實測的高性能驗證了這種方法的可行性和高效性； （ 2 ）在設計方法中採用較精確的數值反驗算，獲取最優設計方案，大大提高設計的準確性和成功率，並縮短了設計試制周期； （ 3 ）在設計過程中發展了計算機輔助三維葉片造型新方法，可以根據設計需要簡便快捷地對葉片進行「前傾」 、 「傾掠」或「彎掠」造型，這些造型對減小各種二次流損失、擴大穩定工況范圍和控制葉輪機氣動噪聲源起到了非常好的作用。
  9. This ku - band three channel receiver consists of spst modules, lna modules and image rejection mixer modules. these modules were designed and tested separately, then were assembled to the whole receiver. all the circuits were designed with small - sized devices so as to reduce the total size of the receiver. and the noise figure was considerably reduced because of the image rejection mixer

    另外，由於採用了鏡像抑制混頻器，從而使整機噪聲系數大為降低。在設計方法上，本文採用了先進的微波電路設計軟體ansoftserenade對所有的電路和系統進行設計、優化和模擬，大大的縮短設計周期，提高設計效率。
  10. 4. the lpfgs are used in single wavelength er - doped fiber amplifiers ( edfas ) as a spontaneous emission noise ( ase ) filter, and the gain of the edfa is increased by 7db and the noise figure ( nf ) is decreased by 0. 5db, for the first time

    4 、成功研製了摻鉺光纖放大器，首次將高頻co2激光脈沖寫入的長周期光纖光柵應用到摻鉺光纖放大器中作為自發輻射噪聲濾波器，使edfa的增益提高了7db 、噪聲系數降低了0 . 5db 。
  11. The proposed algorithm lows the complexity by choosing decision delay in advance and then making solution of the equalizer tap coefficient, a new decision delay choice method is proposed, solution by using weight method, diagonal matrix transform, z extension and a new energy restrictive condition which restrains noise enhance, a new decision delay choice method is proposed, the simulation result shows that the proposed algorithm has better equalization effect and enhanced performance comparing to the general mmse algorithm, simulation research on the precision and dynamic scope of parameters in digital realization time domain equalization algorithm, design software and hardware of time domain equalizer. fourthly, there exist a lot of interfere in dsl line, especially, dsl works in multi - user mode, the near end interference is serious

    通過先選擇判決時延，再進行時域均衡器抽頭系數求解的方法降低了時域均衡計算復雜度；對于均衡器抽頭系數的求解使用了加權技術，通過對角矩陣變換， z擴展，使用不同的能量約束條件對演算法求解，結果表明這種約束有效的抑制了噪聲增強，與常用刪se比較，該演算法有更佳的均衡效果，演算法性能得到了提高：論文還對數字化實現時域均衡演算法中每一部分參數的精度、變量的動態范圍進行了模擬研究，對時域均衡的軟硬體實現進行了設計。
  12. Speech enhancement is becoming an important branch of speech signal process, which mainly used in the noise reduction, the preprocess of the speech recognition system and lpc

    語音增強目前已發展成為語音信號數字處理的一個重要分支。它的主要應用是降低聽覺噪聲、作為識別系統的預處理和線性預測編碼的預處理。
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