通帶衰減 的英文怎麼說

中文拼音 [tōngdàishuāijiǎn]
通帶衰減 英文
bandpass attenuation
  • 通 : 通量詞（用於動作）
  • 衰 : 衰動詞（衰弱） decline; wane
  • 衰減 : attenuation; decay; damping; reduction; rejection; weakening; deamplification; dampening; dying o...
  1. Delay line oscillator is composed of broadband amprifer adjustable attenuator and saw sensor device. after output signal of delay line oscillator is smoothed, it mixes with 109mhz local oscillation signal. its differential frequency signal is smoothed by low - pass filter trimmed by shaping circuit and processed by digital processing circuit

    延遲線振蕩器由寬帶放大器、可調衰減器和聲表面波質量傳感器件構成。延遲線振蕩器輸出信號經濾波后與109mhz的本機晶體振蕩器輸出信號相混頻，通過低通濾波取其差頻，並經整形後由數字信號處理電路處理。
  2. In this paper, firstly, by means of analyzing some rain attenuation experimental results, the raindrop size distributions applied to various climatic regions in china, are discussed

    首先通過分析雨衰減的一些實驗結果，討論能用於中國各氣候帶的雨滴譜。
  3. One of the key technologies of deep space communication is channel code. there are differences between deep space communication and the common space communication. because the former one has some characteristics, such as extending information transmission, and seriously reducing signal energy, it is necessary to ensure the information transmission band and the exactness by using the special means

    通道編譯碼是深空通信中的關鍵技術之一，深空通信與一般的空間通信不同，深空通信具有信息傳輸時延大、信號能量衰減嚴重等特點，必須有特殊的手段保證其信息傳輸的帶寬和準確。
  4. First of all, the characteristics of different adaptive algorithms and equalizers are theoretically researched. then digital microwave communication system model is build by simulink. based on this model, the convergent behavior and bit error rate performance of three equalizers ( nlms, kalman and rls ) are compared in multi - path fading channel

    為了達到這個目的，首先需要從理論上對各種自適應均衡演算法以及自適應均衡器的特性進行深入研究;然後利用simulink建立接近實際環境的數字微波通信系統，在多徑衰減通道環境下比較了三種基帶均衡器（ nlms ， kalman和rls ）的收斂特性以及系統誤碼特性，並比較了nlms基帶均衡器和通帶均衡器的性能。
  5. The attenuation function curve of the new prototype with different number of resonance components is drawn in the whole frequency band, all the components ' parameters are calculated out

    繪制出新的低通濾波器原型整個頻帶內不同節數時的衰減特性，計算出不同節數時原型各節參數。
  6. This paper mainly discusses the design principles and chief techniques of a digital accessing system for power - line communication net ( plcn ). the technology of low bit rate speech compression high - speed modem based on plcn adaptive equalization to the channel anti - jamming and anti - fading are applied in this system. so speech tele - control data and tele - protection signals can be transmitted high quality in the band - limited channel

    該系統綜合應用了低比特率語音信號壓縮編碼技術、基於電力通信網的高速調制解調技術、信號傳輸的通道自適應均衡技術和抗干擾、抗衰減技術，可在帶限通道中高質量的傳輸語音、遠動數據和遠方保護等信號，具有較高的整體性能。
  7. Bessel function design simulation results show the small pass - band ups, stop - band attenuation, in the pass - band with a better group delay characteristics, which can meet the design requirements

    模擬結果表明貝塞爾函數設計的濾波器通帶起伏小，阻帶衰減大，在通帶內群延遲特性較好，可以很好滿足設計要求。
  8. Applying the method of this article, we can get that the attenuation of stop - band is - 75db and the error of reconstruction is 0. 0015. the simulation program and experiment result are provided. the correctness and validity are proved

    用本文的方法，在重構誤差將近千分之一的情況下，取得了較好的濾波器特性，其阻帶衰減達到- 75db ，文中給出了matlab實驗程序及結果，並通過simulink模擬，證明了這種方法的正確性與有效性。
  9. The main work of the system can be divided into four main parts as the following : ( 1 ) 10. 5ghz bandpass filter the main contradiction of filter is caused by its function of dividing frequencies. in order to properly divide frequencies, not only need passband ’ s attenuation to be as small as possible and stopbands ’ as big as possible, but also need a sharp and quick change between the attenuation of passband and stopband, thus to make their diversity obvious

    這四個功能模塊分別是: （一） 10 . 5ghz帶通濾波器濾波器的主要矛盾是由它分隔頻率的功能決定的，為了使分隔理想，一方面要求通帶的衰減盡可能小，阻帶衰減盡可能大，亦即通帶和阻帶的衰減差值要盡量大;另一方面要求通帶和阻帶之間衰減的變化應盡可能快，最好是陡峭的跳變，使阻帶和通帶的分隔十分明顯。
  10. Pass band damping

    通帶衰減
  11. The specification is that the cutoff frequency must be more than 15mhz, the maximum passband ripple must be 0. 2db and the minimum stopband attenuation must be 40db

    該濾波器要求截止頻率大於15mhz ，通帶最大紋波為0 . 2db ，阻帶最小衰減為40db 。
  12. The influences of the reinforcement proportion of distributing bars to concealed bracings on bearing capacity, stiffness, deterioration process of stiffness, ductility, hysteresity capacity, energy dissipation and failure features of low - rise shear wall were studied through experiment analysis on 6 models of low - rise shear wall with concealed bracings under cyclic loading

    通過6個帶暗支撐低矮剪力墻試件在低周反復荷載作用下的試驗分析，研究了不同的分佈鋼筋和暗支撐鋼筋配筋比例對低矮剪力墻承載力、剛度及其衰減過程、延性、滯回特性、耗能、破壞特徵等方面的影響。
  13. In the hfc network, the uplink channel is applied a spectrum of 5 to 42mhz. although such a spectrum is of good attenuation characteristics, one fact is that other services also share the same spectrum, making the noise introduction a serious concern. also the noise will gradually accumulate, thus severely affecting the transmission performance of cablemodem

    在hfc網路中，上行通道採用5 ~ 42mhz的頻帶，雖然這一頻帶具有良好的衰減特性，但是因為其他服務也採用這一頻帶，所以引入噪聲成了一個嚴重的問題，並且這個噪聲將逐步積累，嚴重地影響cablemodem的傳輸性能。
  14. In wavelength division multiplexing ( wdm ) optical communication networks, power equalization and adjustment between channels demand variable optical attenuator ( voa ) be capable of providing low power consumption, low insertion loss, polarization independence, integration compatibility and flatness in a wide wavelength range. among the presented voas, thermo - optic type owns superior polarization dependence upon electro - optic one, and thermo - optic voa can be driven with much lower power than micro - electro - mechanic system ( mems )

    在波分復用（ wdm ）光通信網路中，多通道間的功率均衡和調整需要具有良好特性的光可變衰減器（ voa ） ，這些特性包括：低功耗、低插入損耗、偏振無關、易於集成以及大波長范圍內的通帶平坦性。
  15. Wap is designed to adapt to the bounds of wireless networks ( such as low bandwidth, high latency, less connection stability and so on ) and the bounds of wireless device ( like limited input facilities, limited battery power, limited display, memory and cpu )

    它的提出和設計充分考慮了無線通道的固有特點（如通道穩定性差、衰減干擾大、帶寬窄、時延大） ，以及無線終端處理能力有限，輸入方式和屏幕受限制的問題。
  16. The accurately controlled signal source generates sinusoidal elastic wave accurately controlled in frequency and stable in phase to " illustrate " underground media. time signal stacker receive signal by stacking and doing fft to measure the transfer function of media. " sompi " cepstrum method retrieve group velocity travel times and decayed factors of wave element from observational data of transfer function in a limited frequency window

    精密可控震源用於產生頻率精確相位穩定的正弦彈性波以照射地層內部，信號疊加器通過對接收信號進行疊加和進行傅立葉變換的方式實現對介質傳遞函數的精密測量， 「存否」倒譜方法能夠根據一段窄帶頻域傳遞函數數據獲得時域上各個波成分的群速度傳播時間和介質衰減因子。
  17. Meanwhile, with the development of wdm / dwdm communication systems, more and more attention is paid on the edfas with broader bandwidth, good gain and noise feature, and gain clamping, etc. according to the tianjin natural science foundation project : intelligent fiber amplifiers and light sources, the tianjin natural science foundation project : ( c + l ) broadband fiber amplifier and the nankai - delta ( tianjin ) project : development of gain flattened erbium - doped fiber amplifiers, this dissertation is mainly focused on the study of novel gain - clamped edfa, light sources, multi - wavelength fiber laser and variable optical attenuator for gain - clamped usage, gain and noise improvement of edfa, and broadband edfa

    Wdm / dwdm通信系統的發展又需要edfa具有更大的帶寬、優良的增益和噪聲特性和增益控制等功能。基於上面的情況，並結合天津市重點基金項目? ?智能光纖放大器光源的研究、天津市重點基金項目? ? （ c + l ）超寬帶摻雜光纖放大器和南開-達爾泰（天津）項目? ?開發增益平坦的摻鉺光纖放大器等課題，論文主要圍繞新型增益控制edfa 、增益控制用光源、多波長激光器及可調光衰減器、 edfa性能優化和超寬帶edfa等方面進行了理論和實驗研究。
  18. The research of electromagnetic missile and the slow - decay effect is the advanced task of the electromagnetism, which can be widely used in many fields : ultra - wide radar, ultra - wide secrecy communication, high - power microwave and etc. the detailed analysis of the slow - decay effect of pulse propagation is presented in this paper

    電磁導彈及有關慢衰減電磁波的研究是當前電磁學的前沿課題之一，其應用領域十分廣泛，如超寬頻帶雷達、超寬保密通信和高能微波等。本文對脈沖傳播慢衰減特性進行了詳盡分析。
  19. This dissertation researches on wavelet theory applied to information transmission, including cdma spreading code design, waveform coding in digital modulation, over - saturated multi - access communication, diversity techniques for multi - path fading channels, and peak - to - average power ratio ( papr ) reducing methods for the wavelet packet modulation signals, etc.

    本文以子波理論為工具，較深入地研究了通道傳輸方面的幾個問題，內容包括cdma擴展碼的設計、數字基帶波形成形技術、過飽和多址通信、克服衰落的分集技術和減小子波包調制信號的峰值功率/平均功率比值的方法等。
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