SFPM是(secondary fire particulate matters )缩写，意思是大气二次细颗粒物，是指自然和人为排放的一次污染物（primary pollutants）进入大气，经过积累、生长、化学反应等过程形成的新颗粒物。他是大气细颗粒Pm2.5的主要组成部分。 surface feet per minute 表面线速度(英尺/分), 圆周速度(英尺/分)
It has been explained that the modes of the Stokes and Stokes and anti Stokes are identical respectively ia SFPM.
说明了多级斯托克斯及反斯托克斯光各自具有相同模式的现象。
A study on the mode under the condition of phase-matching of stimulated four-photon mixing (SFPM) in optical fiber waveguides has been performed.
本文对相位匹配条件下光纤波导中的受激四光子混频(SFPM)过程的模式问题进行了理论和实验研究。
Stimulated four-photon mixing (SFPM) has been observed in silicn fiber by using the dispersion of the waveguide modes to compensate for bulk dispersion.
利用光纤不同模式间的色散补偿介质的色散观测到了不同模式对的SFPM。
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