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(dǎo)致穆譜峰形寬化,內(nèi)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(qiáng)對弱信號的檢測和跟蹤,在特征增強(qiáng)的基礎(chǔ)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(jìn)行觀測,因此必須選一條公共的譜線經(jīng)望遠(yuǎn)系統(tǒng)對日成像,以便完成望遠(yuǎn)鏡在軌校準(zhǔn)。
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(zhǔn)使用,因此本文采用了c(97.7nm)作為在軌校準(zhǔn)譜線。