在实验过程中还发现有电子浓度起伏的金属表面而会使周围空气温度降低的电子致冷现象。
In the experiment we discovered that fluctuations of electrons in metal surface can reduce the temperature of the air around the metals.
鉴于这种起伏，估算室内空气中氡的年平均浓度需要对氡的平均浓度至少进行三个月的测定。
Because of these fluctuations, estimating the annual mean concentration of radon in indoor air requires measurements of mean radon concentrations for at least three months.
消光起伏法是一种新的颗粒测量方法，可用来同时测量两相流中颗粒的粒径分布和体积浓度。
Transmission fluctuation spectrometry (TFS) is a new method for particle size measurements, in which the particle size distribution and particle concentration can be measured simultaneously.
本文采用双光路激光系统，对亚麻尘的相对浓度进行了连续测量，具有测量范围宽、灵敏度好、抑制激光强度起伏噪声等特点。
The two laser beam system has been used to measure the relative density of linen dust, with the feature of wide measurement range, good sensitivity and restraining the intensity fluctuation noise.
透过率起伏信号可用来测量颗粒粒径和浓度。
The fluctuating transmission signal can be used to measure particle size and particle concentration.
透过率起伏信号可用来测量颗粒粒径和浓度。
The fluctuating transmission signal can be used to measure particle size and particle concentration.
应用推荐