半峰全宽:full width at half maxima,简称FWHM。半峰全宽亦称半宽度,半峰宽,半峰宽度,区域宽度,区域半宽度,它是色谱分析的术语,指色谱峰高一半处的峰宽度,即通过峰高的中点作平行于峰底的直线,此直线与峰两侧相交两点之间的距离。用符号Y1/2或2△t1/2表示。它还是天文学的数学工具。
宽线,其 半峰全宽(FWHM, full width at half maximum)在1000 – 15000 km s -1 , 典型值4000 – 5000 km s -1 ,只有...
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...专利名称碳纳米管、电子发射源、电子发射装置和其制造方法 技术领域本发明涉及一种碳纳米管、包括该碳纳米管的电子发射源以及包括该电子发射源的电子发射装置。尤其是,本发明涉及一种X射线衍射的半峰全宽(FWHM)是0.6或更小的碳纳米管、包括该碳纳米管的电子发射源和包括该电子发射源的电子发射装置。
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5 dB net gain at the wavelength of 1536 nm has been obtained in a 3.5 cm long channel waveguide with (250 mW) pump power at 980 nm and the FWHM is 14 nm.
用250mW,波长为980nm的激光抽运3.5cm长的条形波导,在1536nm波段下得到的最大净增益是5dB,增益谱的半峰全宽是14nm。
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对信号响应的波形特征进行分析和讨论,实验得出LIV信号半峰全宽与数据采集卡临界采样率成反比例关系。
The results show that there are inverse proportional relationship between full wavelength at half maximum(FWHM)of the LIV signal and critical sample rate of data acquisition card.
运用激光喇曼光谱的分析方法,测量了它们的激光喇曼谱在伸缩振动喇曼峰处的半峰全宽,同时也测量了样品在伸缩振动喇曼峰处的退偏振度。
By using laser Raman spectrum method, the samples full width at half maximum (FWHM) and depolarization ratio of laser Raman spectrum at stretching vibration were measured.
运用激光拉曼光谱的分析方法,测量了它们的激光拉曼谱在伸缩振动拉曼峰处的半峰全宽,同时也测量了样品在伸缩振动拉曼峰处的退偏振度。
By laser Raman spectrum method, the samples' full width at half maximum (FWHM) and depolarization ratio of laser Raman spectrum at stretching vibration were measured.
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