譜帶增寬 的英文怎麼說
中文拼音 [pǔdàizēngkuān]
譜帶增寬
英文
band broadening
-
譜 :
Ⅰ名詞[書面語]1 (按類別或系統編成的書或冊子等) table; chart; register 2 (指導練習的格式或圖形)...
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However, the recent demand for immediate expansion of the fiber - optic communication window has been an area of significant interest
那麼對于
增大edsfs
帶寬及
譜線平坦化的研究就顯得尤為重要,而一個主要的實現方式就是在edsfs中加入濾波器。
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When the - 3 - particle size was small, the aberration of crystal lattice appeared and the bandgap energy increased, which resulted in the blue shift of absorption in the spectrum
本研究中小的二氧化鈦晶粒導致了tio _ 2的晶格畸變,進而
增大了tio _ 2的禁
帶寬度,表現在光吸收
譜的藍移。
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By formula about effective bandwidth, he get the bandwidth near 1540 nm wavelength, which is 64. 54nm. the bandwidth is more bigger than the gain bandwidth of er - doped silica fiber and fluoride fiber amplifier ( 20nm - 30nm ). it is useful to improve transmitted capacity of information in fiber
對1540nm處光
譜有效
帶寬的計算,得到結果為64 . 54nm ,這個
帶寬已遠高於目前常用摻er硅光纖和氟化物光纖放大器的20 - 30nm
增益
帶寬,于擴大光纖信息傳輸容量有很大益處。
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Enhanced variable rate codec speech service option 3 for wideband spread spectrum digital systems
寬帶頻
譜擴展數字系統用
增強的可變率編譯碼器語音服務選擇3
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Evrc 3 software distribution for tia - 127 - a - enhanced variable rate codec speech service option 3 for wideband spread spectrum digital systems
Tia - 127 - a的軟體配置.
寬帶頻
譜擴展數字系統用
增強的可變率編譯碼器
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We also have analyzed the photoluminescence ( pl ) spectra of some zno films, it turns out that the emission of ultraviolet light comes from the radiative recombination of excitons within nano - crystal energy band - gap, and the pl peaks move to smaller wavelength because zn are substituted by fe, co, and cu, which cause the size of the film grains smaller and the effective band - gap bigger. the red emission of zno films is due to, on the one hand, decrease of the film grains size which causes the emission intensity smaller and smaller until it disappears abruptly, on the other hand, the transition of electrons from deep donor level of the oxygen vacancies to the valence band
另外,我們還對薄膜光致發光性質進行了分析和研究,結果表明:納米結構zno薄膜的紫外發光來源於
帶間激子的輻射復合發光, pl
譜的
帶邊發射峰發生藍移是由於fe 、 co 、 cu對zn的替代使薄膜粒子的尺寸減小,使薄膜的有效
帶隙
增寬; zno薄膜的紅色發光,一方面是zno顆粒尺寸的減少,
帶間的激子發射峰越來越弱直至猝滅,另一方面主要是與zno晶格中的o空位有關,由深能級復合發光引起紅光發射。
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Vanadyl phthalocyanine ( vopc ) films prepared by vacuum deposition were annealed under magnetic field. uv - visible absorption results showed that the films annealed under magnetic field showed a q - band red - shift. x - ray diffraction study ( xpj ) ) indicated enhancement in diffraction intensity and shift of peak position
分析表明酞菁氧釩分子uv - vis吸收
譜q
帶峰值發生較大的紅移; xrd測試中衍射峰強度明顯
增強,峰位變化,但峰
寬變化不大;原子力顯微鏡( afm )分析發現晶粒大小無明顯變化。
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By comparable investigation, two luminescence mechanisms can explain the different variety of pl intensity of origin and annealed samples and are dominant mechanisms separately in unanneal and anneal course
經過退火處理后,在相同波長的光激發下發光強度逐漸
增強,峰型逐漸變好,發光
譜帶的半峰
寬也變窄。
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Because of the affection of noise and signal fading, in order to high data rate access and high quality, wireless communication need new technology to improve the link reliability and enhance the spectrum efficiency. mimo ( multiple input and multiple output ) can enhance the spectrum efficiency and increase channel capacity greatly, and reduce the multipath affection without spectrum band and power increasing. the 3th generation mobile communication wcdma is coming, with the purpose of putting mimo, stbc ( space time block coding ), space diversity into practice of wcdma systems, in order to lay the foundation of 3g toward 4g, this dissertation has done some research under this background
在發射機和接收機使用多個天線進行數據傳輸的多輸入多輸出( mimo )技術,可以在不
增加
帶寬和天線發送功率的條件下,成倍的提高頻
譜利用率,提高系統的通道容量,還可以抗多徑干擾。第三代移動通信wcdma即將到來,為了將多天線技術( mimo ) ,空間分集技術,空時編碼技術用到wcdma系統中去,為第三代移動通信向第四代移動通信系統平穩過渡奠定一定的基礎,需要做一些理論上的研究。
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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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3. 5 cm long and 4um wide channel silica glass waveguide was fabricated by ag + - na + ion - exchange and 5 db net gain at 1536 nm was obtained with a pump power of 250 mw ( at 980 wavelength ) ; fwhm is 14 nm around 1536 nm
用波長為980nm , 250mw的半導體激光器泵浦該條型波導,在1536nm波長下得到的最大凈
增益是5db :在1536nm附近3db凈
增益
譜帶寬是14nm 。
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The results show that the differences between the two composites are very large. although the micrograph of the ni nano - wire and the co nano - wire are nearly the same, as the metal composition increased, the absorption band - edge of the ni / aao composite is small red - shifted ( 13 run ), however, the absorption band - edge of the co / aao composite is strongly red - shifted ( 80 nm ). meanwhile, the ni / aao and co / aao composite exhibit the optical features of the semiconductor with indirect and direct band gap respectively
或no組份比的增加, ni / aao吸收邊的紅移量僅約13nln ,而co / aao的吸收邊紅移量卻超過了80lun ,分析發現ni / aao復合體系具有間接帶隙半導體的光學特徵,而co從ao復合結構則具有直接帶隙半導體的光學特徵; 5 .實驗研究了a創aao納米有序陣列復合結構的光吸收特性,在其光吸收譜上出現了較強的ag表面等離子體振蕩吸收峰,隨ag沉積量的減少,吸收峰位發生紅移,且逐漸展寬