窄帶譜 的英文怎麼說

中文拼音 [zhǎidàipǔ]
窄帶譜 英文
narrow band spectrum
  • 窄 : 形容詞1. （橫的距離小） narrow 2. （心胸不開朗; 氣量小） petty; narrow 3. （不寬裕） hard up; badly off; short of
  • 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）...
  1. Colour filters are not very effective in isolating narrow spectral bands.

    一些濾色片不能很有效地分離狹窄的光譜帶。
  2. The radio spectrum used in narrowband personal communications services ( pcs )

    用於窄帶個人通信業務（ pcs ）的無線頻譜。
  3. Female courtship signal of the brown planthopper was made of many continuous regular pulses and male ' s signal was made of similar syllabics and had two types with different time domain characteristics. second male vibrational signal differed from male courtship signal with wide spectrum range and regular syllabics frequency. time domain characteristics of signals in different individuals even the same individual were different

    頻域特徵分析知，褐飛虱雌蟲求偶嗚聲信號的頻域特性較穩定，個體內比個體間差異小；雄蟲求偶嗚聲信號s 、 e片段頻譜范圍較寬，但主振頻率比較接近，差異不顯著； m片段頻帶較窄，主振頻率mvf略小於s 、 e片段，變異較小； m片段脈沖重復頻率prf為幻
  4. Heavy rainfall occurred in the warm area, and maximum rainfall lay in the windward slope where the width of raindrop size distribution was b roadened and sometimes it was bimodal spectrum. the shape of rain band in cold area was zonal, and the area of rain band was small

    暖區有明顯的強降水中心，雨強極大值出現在山區迎風坡，降水雨滴譜譜寬較大，有時滴譜呈雙峰型分佈；冷區降水區常呈帶狀分佈，雨區范圍大，雨滴譜較窄，雨滴譜為單峰型。
  5. Then some cavity quantum electro - dynamic ( cqed ) effects are studied by experiment. the photoluminescence ( pl ) intensity enhancement at resonance wavelength and suppression at off - resonance wavelength, emission spectrum narrowing as well as emission intensity redistribution in space are observed in the microcavity device fabricated with distributed bragg reflector ( dbr ) and silver mirror as well as that done with two silver mirrors

    分別在帶有dbr結構的平面微腔及全金屬鏡構成的平面微腔中觀察到了諧振模式處的輻射增強及非諧振模式處的輻射抑制，發射譜線窄化以及輻射強度空間分佈重組等腔量子電動力學現象。
  6. ( 4 ) the results of ftir showed that the ftir spectrum of decaying remainders at all periods was near to that of original samples, and was far to that of soil humus

    （ 4 ）紅外光譜分析結果，腐解物原樣的紅外光譜各主要吸收帶均較窄且強度較大，而腐殖酸的紅外光譜各主要吸收帶均較寬且峰尖平緩。
  7. Standard test method for calibration of narrow - and broad - band ultraviolet radiometers using a spectroradiometer

    使用光譜輻射計校準窄帶和寬帶紫外輻射計的標準試驗方法
  8. 5nm and 10nm respec live1y, but the ye1 l ( ) w band i s also found on the ijl spectra of these two samp1es. the yel low peak i s very strong in 1 # samp1e, its intensi ty is higher than that of the ilear - - band peak. while the ye11ow band is quite weak compairing with the 1 # samp1e, and its radio of ye1low - - band / near - - band is on1y 0

    1 # 、 2 #樣品的pl譜峰均很窄，其fwhm （半峰寬）僅為7 . 5nm和10nm ，但兩個樣品的pl譜均出現了黃峰， 1 #的黃峰較高，其強度超過了帶邊峰，而2 #的黃峰得到很大改善，其黃帶帶邊峰強度比僅為0 . 17 。
  9. Thus, the frequency domain adaptive filter is well suited to a multi - narrowband interference scenario, the paper studied frequency domain adaptive algorithms, carried out analysis and computer simulations. simulation results : for gold codes ds - ss signal of length 63, 4 interferences of signal to interference ratio ( sir ) 40 ub or 4 narrowband interferences of signal to interference ratio ( sir ) 40 db and frequency - spectrum bandwidth 12 percent of the whole bandwidth, the sir improvement is better than 20db

    模擬結果指出，在輸入信號為干擾是4個等強度的多音干擾或4個頻譜帶寬占信號總帶寬12的強窄帶干擾（干信比為40db ）的擴頻信號（碼長為63的gold碼序列）情況下，演算法的干擾抑制比均優於20db 。
  10. For rfi and narrowband noise interferences, this dissertation studies notch filter and spectrum equilibrium and uses them to suppress narrow jammings in signal domain

    對于rfi和窄帶噪聲干擾，本文研究了頻域陷波和譜均衡兩種方法，並將之應用到信號域來抑制窄帶干擾。
  11. Since the spectrum of the helicopter noise contains wide band continuous component and narrow band line component, we can use the wide band signal detection method or narrow band signal detection method. both detection methods are discussed

    直升機噪聲既含有寬帶連續譜成分，又有很強的窄帶線譜分量。根據直升機噪聲的特點，我們既可以採用寬帶能量檢測，又可以採用窄帶線譜來檢測直升機信號。
  12. This dissertation is mainly concerned about the radiation of the tem - horn arrays which radiate uwb ( ultra wideband ) pulse, it mainly involves three parts : theory, numerical stimulation and experiment. the uwb antenna is a new research field in the world which has many differences from nb ( narrow band ) antenna. the most difference is that the uwb antenna such as tem - horn radiates nanosecond pulse which has wide frequency spectrum, but the nb antenna radiates single frequency signal

    超寬帶天線是一項新興的研究領域，它與窄帶天線有很多不同之處，最根本的不同在於：超寬帶天線例如tem喇叭天線是輻射納秒級短脈沖信號，這種脈沖信號有很寬的頻譜；而窄帶天線大都是輻射單一頻率時諧信號的。
  13. Based on fourth - order cumulant, a computationally efficient method for joint estimating both directions of arrival and ranges of near field sources with known carrier frequency is firstly presented. the proposed algorithm need not any spectral peak searching and the 2 - d parameters are automatically paired. lt is suitable for arbitrary additive gaussian noise environment. in the following section, a 3 - d esprit method for jointly estimating of frequencies, doa ' s and ranges of multiple near - field sources with unknown carrier frequencies is proposed. the parameters estimation are given by the eigenvalues of different matrices. furthermore, its performances are confirmed by several computer simulations

    利用四階累積量，第五章首先給出了一種載頻已知的情況下基於近場源的距離和波達方向聯合估計演算法，通過構造的陣列輸出信號四階累量矩陣使空間信號到達方向和距離估計無需譜峰搜索，且參數自動配對，適合於任意高斯噪聲環境。進一步在第三節提出了一種載頻未知的情況下的多個近場窄帶信號源doa 、距離和頻率聯合估計的3 - desprit演算法。
  14. On the basis of the former research works, we present the detecting method as follows : for the narrow band characteristic of the track signal we use under - sampling instead of nyquist sampling to reduce the sampling rate. as to the carrier frequency, the spectrum of the 18 - information frequency - shift track signal has two peaks, then the carrier frequency is the average of the two peak frequency, to um - 71 jointless track signal, it has only one peak, then the carrier frequency is the peak frequency

    針對移頻軌道信號的窄帶特性提出了使用欠采樣技術代替奈奎斯特采樣的方法，以降低信號的采樣頻率;國產18信息移頻軌道信號頻譜具有雙峰，雙峰頻率平均值就是信號的載頻頻率，而um - 71無絕緣軌道信號頻譜單峰，峰值頻率即為信號的載頻頻率。
  15. The binary optic hyperspectral imaging technology is a spectro - tomographic technique which integrates over a narrowband of the image cube which is a new concept of imaging spectrometer. so the general research direction and the basic research scheme are determined

    通過把光譜層析技術和窄帶濾波技術相結合，實現了一種新的成像光譜原理，即利用二元光學元件軸向色散的凝視成像光譜技術，從而確定了論文的總體研究方向和基本方案。
  16. Least narrowband spectrum properties of fiber bragg grating

    極窄帶寬的布拉格光纖光柵光譜特性研究
  17. The calculated density of mgf2 with iad was increased from 0. 70 for conventional process to 0. 97. meanwhile we find that the spacer layer has a great influence on the spectral shift. the further the layers are away from the spacer, the less the effect ; in the same way, the iad reduces the spectral shift of nb205 / sio2 narrow band interference filters from 29. 4nrn to 12. 4nm ; the iad reduces the spectral shift of tio2 / sio2narrow band interference filters from 24. 7nm to 8. 4nm

    同時發現間隔層對光譜漂移的影響最大，越遠離間隔層的膜層，其影響越小；而nb _ 2o _ 5 sio _ 2多層膜窄帶干涉濾光片漂移從常規工藝的29 . 4nm降到12 . 4nm ； tio _ 2 sio _ 2多層膜窄帶干涉濾光片漂移從常規工藝的24 . 7nm降到8 . 4nm 。
  18. 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。
  19. The method of using a single wideband facility to transmit many relatively narrow - bandwidth signals by subdividing the frequency spectrum used in the wideband channel

    使用單個寬帶設備傳送許多窄帶信號的方法。它是通過細分寬帶通道上的頻譜來實現的。
  20. Because of the good sensibility, ultrasonic narrow band signal analysis technique with 1mhz central frequency was chosen to differentiate the heat treatment samples above - mentioned. there are obvious differences among heat treatment products in principal frequency, spectral peak ' s quantity, amplitude and distribution. that is to say, the technique of ultrasonic narrow band power spectral can be applied to characterize the microstructures of multi - phased alloy steels

    利用窄帶信號頻譜分析技術靈敏度高的突出優點，選取中心頻率為1mhz的窄帶超聲信號，對上述不同熱處理試樣進行超聲功率譜分析，發現不同熱處理產物在功率譜主頻率、譜峰特徵（幅度、數量、分佈）等方面，都存在不同程度的差異。
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