spectrum n. (pl. -tra ) 1.【物理学】谱,光谱;波谱;能谱,质谱。 2.【无线电】射频频谱;无线电(信号)频谱。 3.【心理学】(眼睛的)余像;残像。 4.〔转义〕范围,幅度;(连续的)系列。 an absorption spectrum 吸收(光)谱。 a bright line spectrum 线状光谱。 an optical spectrum 光谱。 a solar spectrum 太阳光谱。 a wide spectrum of opinion 意见的不同幅度甚大。
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例句与用法
A particular spectrum line corresponds to a certain definite light wavelength . 某特定的谱线就代表一个确定光的波长。
Measuring frequency of received signal by a spectrum line ratio method 谱线比值法测量接收信号的频率
Identification of spectra lines of ni - and co - like ions of laser - produced ta plasma 钽激光等离子体类镍和类钴离子谱线辨认
Research on spectrum line refractive index of triangular prism with spectrometer measuring 分光计测量三棱镜谱线折射率的研究
Breadth of spectrum line 谱线宽度
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 摘要双谱线功率一致性是拍波干涉测长方案对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 ) 对穆谱研究发现,粉末晶粒减小导致穆谱峰形宽化,内磁场分布( hfd )减小。
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 为了加强对弱信号的检测和跟踪,在特征增强的基础上,研究了特征提取的方法,开发了双阈值viterbi线谱跟踪器。
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 四个通道都是在特定谱线对日进行观测,因此必须选一条公共的谱线经望远系统对日成像,以便完成望远镜在轨校准。
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 经过一系列的分析计算,太阳的c ( 97 . 7nm )谱线对eut灵敏度满足在轨校准使用,因此本文采用了c ( 97 . 7nm )作为在轨校准谱线。