spectrum n. (pl. -tra ) 1.【物理學】譜,光譜;波譜;能譜,質譜。 2.【無線電】射頻頻譜;無線電(信號)頻譜。 3.【心理學】(眼睛的)余像;殘像。 4.〔轉義〕范圍,幅度;(連續(xù)的)系列。 an absorption spectrum 吸收(光)譜。 a bright line spectrum 線狀光譜。 an optical spectrum 光譜。 a solar spectrum 太陽光譜。 a wide spectrum of opinion 意見的不同幅度甚大。
A particular spectrum line corresponds to a certain definite light wavelength . 某特定的譜線就代表一個確定光的波長。
Measuring frequency of received signal by a spectrum line ratio method 譜線比值法測量接收信號的頻率
Identification of spectra lines of ni-and co-like ions of laser-produced ta plasma 鉭激光等離子體類鎳和類鈷離子譜線辨認
Research on spectrum line refractive index of triangular prism with spectrometer measuring 分光計測量三棱鏡譜線折射率的研究
Breadth of spectrum line 譜線寬度
Output power equalization of laser dual spectrum lines is a special requirement which is put on its laser source by two wavelength beat-wave absolute distance interferometry 摘要雙譜線功率一致性是拍波干涉測長方案對激光光源提出的特殊要求。
From the mossbauer spectra, it can be found that the reduction of grain size can make the spectra line more widen and the decrease of hyperfine field distribution ( hfd ) 對穆譜研究發(fā)現(xiàn),粉末晶粒減小導致穆譜峰形寬化,內磁場分布(hfd)減小。
To detect and track weak signals, feature extraction is studied on the base of feature anlysis, and a viterbi spectrum line tracker with double thresholds is exploited 為了加強對弱信號的檢測和跟蹤,在特征增強的基礎上,研究了特征提取的方法,開發(fā)了雙閾值viterbi線譜跟蹤器。
Solar images can be obtained by four telescopes at 13.0nm, 17.1nm, 30.4nm and 19.5nm respectively . it is important for calibration of eut in orbit selecting a proper spectrum line 四個通道都是在特定譜線對日進行觀測,因此必須選一條公共的譜線經(jīng)望遠系統(tǒng)對日成像,以便完成望遠鏡在軌校準。
Through analyzing and calculating, sensitivity of solar ciii ( 97.7nm ) spectrum line can meet demand of spectrum line for calibration of eut in orbit . so solar ciii ( 97.7nm ) spectrum line can be applied to calibration of eut 經(jīng)過一系列的分析計算,太陽的c(97.7nm)譜線對eut靈敏度滿足在軌校準使用,因此本文采用了c(97.7nm)作為在軌校準譜線。