頻譜純度 的英文怎麼說

中文拼音 [bīnpǔchúndù]
頻譜純度 英文
spectrum purity
  • 頻 : 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...
  • 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）...
  • 純 : 形容詞1 （純凈; 不含雜質） pure; unmixed 2 （純粹; 單純） simple; pure and simple 3 （純熟） skil...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 頻譜 : frequency spectrum; frequency content; spectrum; power density spectrum; power spectrum; [系統] s...
  • 純度 : fineness; pureness; purity; purity quotient; rate of purity
  1. The experimental results show : the flattop phenomenon on the diode voltage pulse was very apparent for using the carbon fiber cathode, that is to say, the pulse duration of the diode voltage was widened ; moreover, under the condition of the same power of microwave, the pulse duration of the out - put microwave was prolonged by about 30 % ; the peak power of the microwave was enhanced by 3db

    通過在裝置上做的兩種陰極的對比實驗，結果顯示:碳纖維陰極的使用，改善了電子束質量，使輻射微波的脈寬增加了30 %以上，輻射主瓣方向上的功率密度提高了3db以上，頻譜分佈較純凈，實現了微波的高效輸出。
  2. 3. with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit, we have successfully enhanced sensitivity, expanded dynamic range, increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption. 4

    3 、對通信機的全面改進，包括lna結構的調整、鎖相環環路濾波器的優化、發射部分結構的調整以及中頻解調電路的相差調整，提高了系統的接收靈敏度、改善了本振的頻譜純度、減少了鎖相環的鎖定時間、使中頻解調后的信號質量大為提高，同時還減少了體積、節約了系統的功耗。
  3. Through the research of direct digital synthesizer ( dds ) used as a divider in phase lock loop ( pll ), a frequency synthesizer with small frequency resolution ratio and high purity frequency spectrum can be realized

    摘要通過對直接數字合成器在鎖相環路中作為分頻器應用的研究，使頻率合成器可以在實現超細頻率解析度的同時達到高的頻譜純度。
  4. Sinewave spectral purity

    正弦波頻譜純度
  5. The technology of frequency synthesis is important in latter - day communication system. it ’ s widely used in wireless communication and electron system. with the high - speed development of technologies, higher stability, higher purity, broader range and larger output number of frequency are required in the frequency source of frequency synthesizer which is the core of this technology

    頻率合成技術是近代通信系統的重要組成部分，在無線電通信與電子系統的各個領域中得到了廣泛的應用。隨著各種技術的飛速發展，人們對頻率合成器的頻率穩定度、頻譜純度、頻率范圍和輸出頻率的個數提出了越來越高的要求。
  6. Synthesizers with low phase noise, highly pure spectrum, high resolution and fast frequency jump speed have dominating development direction of the frequency synthesis technology

    低相位噪聲、高純頻譜、高解析度和高速頻率捷變成為頻率合成技術發展的主要趨勢。
  7. In this paper, the research actuality status of zno thin film ’ s structural character, preparation methods and electrical - optical properties is summarized. the effect of sputtering parameters, annealing parameters and doped sb2o3 on the structure, optical absorption and electrical properties of zno thin film is studied by sem, xrd, xps, eds, uv - vis spectrophotometer, hall effect detector, four - point probe electric resistance measurement and direct - current impedance measurement etc. the results of sem, xrd and edx show that zno thin film possesses good processing stability

    本文在綜述zno薄膜的結構特性、制備方法和光電性能等現狀的基礎上，採用射頻磁控濺射技術制備了純和sb _ 2o _ 3摻雜的zno薄膜，採用sem 、臺階儀、 xrd 、 xps 、 uv - vis分光光度計分析、電阻儀、阻抗譜儀等儀器設備分別研究了濺射工藝參數、退火工藝參數和sb _ 2o _ 3摻雜對zno薄膜結構特性、光吸收性能和電學特性的影響規律。
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