flat gain 中文意思是什麼

flat gain 解釋
平坦增益
  • flat : n 1 〈英罕〉地板；（房屋的）一層。2 一套房間；〈pl 〉分宅公寓〈美國高級公寓叫 apartment house〉。...
  • gain : vt 1 獲得；博得，掙得；贏得，打勝（戰爭、官司）。2 吸引；爭取…（到一邊），說服。3 （尤指通過努力...
  1. 3. analyse the correlation between soil water content and spectral reflectance of intertidal flat, and gain the best band to monitor soil water content by remote sensing. 4

    對實測潮灘土壤水分與實測潮灘土壤光譜反射率進行了統計相關分析，得出了可見光及近紅外波段范圍內土壤水分遙感監測的最佳波段； 4
  2. But for the final energy structure of er3 +, property of edfa ' s gain has its inherent disadvantage : edfa ' s gain is different vs wavelength, in other words, its gain spectrum is not ideally flat, so the output signal will be different if the input signal have the same power

    但是由於edfa中工作物質鉺離子能級結構的影響， edfa對光信號的放大特性也有其固有的缺陷： edfa對不同波長的光信號的增益並不完全相同，即其增益譜不平坦，因此一組強度相同的光信號經過放大后的強度會有所不同而產生偏差。
  3. It realized multi - octaves broadband, flat intraband gain, low standing wave ratio, long linear range and dynamic range

    實現了多倍頻程帶寬、確保帶內增益平坦、駐波小、線性范圍和動態范圍大。
  4. The influence of the configuration, the pump wavelength, the bragg wavelength, the reflectivity, the pump power and the length of edf to the gain - clamped characteristics is studied. an optimal l - band gain - clamped edfa configuration with appropriate parameters of the amplifier, which can also provide a flat - gain band, are given

    總之，本論文圍繞光纖通信領域的國際熱點問題，從理論和實驗上研究了高增益、低噪聲、譜平坦的摻餌光纖放大器的實現，關于edfa的特性的研究成果，我們相信能對科研生產起一定的指導作用。
  5. We propose the joint filterbank precoders and decision feedback equalizers structure at first, by which the dispersive channel is equivallent into parallel independent flat fading subchannels such that the diversity gain of the receiver is increased. then we adopt the discrete - time ( dt ) canonical model to convert the problem of blind signal processing of tv dispersive channels into processing the time - invariant multi - channels model blindly, and discuss the problem of blind equalization and identification of tv dispersive channels based on this new model

    第一種是採用濾波器組聯合均衡方法將色散通道等價為一組獨立的平坦衰落子通道，以提高接收機的分集增益；另外一種是提出採用離散正則模型將時變色散通道的盲信號處理轉化為時不變多通道模型的盲信號處理，並針對該模型對時變色散通道的盲均衡與盲辨識方法進行了詳細討論。
  6. This method can convert the dispersive channels into independent flat fading subchannels, so that it increase the diversity gain of the receiver and outperform that of the original paper as for the ber performance and maximum mutual information while maintaining all the advantages of it. in chapter 4, the models of the tv dispersive channels are reviewed in signal processing perspective

    在第四章中，作者對時變色散通道的信號處理模型進行了研究，提出了離散正則模型的概念，對其進行了詳細的討論，並利用多采樣率理論將該模型推廣到一般的時變色散通道。
  7. Standard practice for estimate of the heat gain or loss and the surface temperatures of insulated flat, cylindrical, and spherical systems by use of computer programs

    用計算機程序估測絕熱的平面系統圓柱形和球形系統的表面溫度及吸熱或熱損失的標準實施規范
  8. Raman fiber amplifier （ rfa ） is a kind of optical amplifier that can amplify signal light directly through nonlinear interaction of high intensity pump and signal light in fiber. whereas the spectrum of raman gain coefficient of optical fiber is not flat, the gain of signal light with different wavelength induced by a single pump is rather different, when wavelength division multiplexing ( wdm ) signal light is amplified by a single pump, the gain spectrum of the wdm signal light is not flat. the flatness of the wdm signal light has important impact on the optical signal - to - noise ratio ( osnr )

    拉曼光纖放大器（ ramanfiberamplifier ，簡稱rfa ）利用高強度的泵浦光與信號光在光纖中的非線性相互作用實現信號光的直接放大，但是由於光纖的拉曼增益系數譜很不平坦，所以同一泵浦光源對不同波長信號光的增益就存在很大的差別，因此，用單泵浦光源來放大波分復用（ wavelengthdivisionmulti - plexing ，簡稱wdm ）信號光時，各信號光的增益值就有很大差異， wdm信號增益的平坦度對光信噪比（ opticalsignal - noiseratio ，簡稱osnr ）有重要影響。
  9. This subject aim at designing a linear power amplifer whose output power is 40w for 225 - 450mhz band. but it seems not easy to finish the task because of this power amplifier own unique requirements including high output power, broad working frequency band, high linearity, and flat gain. due to the complexity involved, theoretically several soltuions are derived in the final scheme such as broadband matching technology, power - retreat, power synthesize, automatic power control and negative feedback. in addition, the design will be optimized by eda software and the final test result indicates that our design is successful

    本課題的目標是研製一個輸出功率為40w的225 450mhz的線性功率放大器。由於該功放要求輸出功率大，工作頻帶寬，帶內增益波動小，線性度高，所以其終合設計難度大。鑒于這個原因，在理論設計上筆者採用了寬帶匹配、功率合成、功率回退、負反饋、自動功率控制等技術；在實踐中精心設計電路，並且配合eda軟體模擬，最終達到所要求的指標。
  10. Testing method on transmittance, reflectance and emittance of flat glasses and evaluation of solar heat gain coefficient

    平面玻璃的透射率反射率輻射強度的試驗方法和太陽輻射增熱數值的評估
  11. Because using ofdm, a frequency - selective fading channel can be transformed into multiple frequency - flat fading sub - channels, in the coding process, spatial diversity ( due to multiple antennas ) is integrated with frequency diversity ( due to delay spread ), therefore, the proposed code can provide higher diversity gain than space - time code alone

    該編碼利用正交頻分復用把頻率選擇性衰落通道變換成平衰落通道的特性，同時引入了基於多天線的空間分集和基於時延擴展的頻率分集，比空時編碼具有更高的分集增益。
  12. The fourth part considered how to improve system performance by adopting transmission diversity in flat fading channels. in the traditional space - time trellis code design, the space diversity, time diversity and channel code are concerned together to get best space diversity, time diversity and code gain

    傳統的空時格碼把空間分集、時間分集和前向糾錯編碼聯合設計，以n摘要獲得最大的空間分集、時間分集、通道編碼的增益。
  13. The typical erbium - doped fiber gain spectrum is a combination of a high - intensity region and a flat part spectrum, and the power difference has limited the bandwidth of edsfs

    典型的摻鉺光纖增益譜線由一個譜峰和後面的譜肩組成，它們之間的功率差異造成了對光纖陀螺可應用的edsfs帶寬和平坦度的限制。
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