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。
Solvothermal synthesis and diffuse reflectance spectra of k2mnsnte 4的溶剂热合成和反射光谱研究
Solid state synthesis , crystal structure and diffuse reflectance spectra of k4sn3se 晶体结构和反射光谱研究
53 maize standard samples diffuse reflectance spectra were collected from 4000cm - 1 ~ 10000cm - 1 at 8 cm - 1 resolution on perkin - elmer spectrum one nts near - infrared instrument at different energy level . 3 samples were scanned 10 times repeatedly at 100 % , 76 % and 34 % energy level for energy variance analysis 结果表明,随着仪器能量降低,模型相对标准偏差( rsd )有增大趋势,仪器相对能量从100衰减到18后,模型预测值rsd从2 . 5增至4 . 72 。