等效粒径

计算结果表明：Mie散射相函数能够描述生物组织后向（大角度）散射光强振荡特性与等效粒径的对应关系，可为基于后向散射光的无创伤或微创伤诊疗提供理论依据；

The numerical results show that Mie phase function can not only describe the relationship between the equivalent diameter and the light intensity oscillation in backscattering region , which provides a theory tool of noninvasive or minimally invasive diagnosis and treat ;

泥沙颗粒暴露度与等效粒径研究

Relative exposure degree and equivalent grain size of non-uniform sediment

最后还对引起空气动力学粒径和光学等效粒径之间差异的原因进行了分析。

Lastly , the reason for difference of optics sizing and aerodynamic sizing is analyzed .

同时提出了等效粒径的概念及其计算方法。

Furthermore , the concept of equivalent grain size and the method for calculation is suggested .

阐述了泥沙起动机理，通过对等效粒径概念及表达式的引入，推得了泥沙起动公式。

The formula for calculating the incipient motion condition of non-uniform sediment has been established by considering the equivalent grain and the relative exposure degree .

小麦粉样品的等效粒径微分分布曲线均在10~40μm区间出现一个峰，其峰值高度随着研磨小麦硬度的增大而减小。

There was a peak during the area of 10-40 μ m in the curve . The height of each peak decreased with increasing of wheat hardness .

并对不同粒径，在床面不同位置的暴露度、暴露度系数及等效粒径进行了计算。

Calculations of exposure degree , exposure coefficient and equivalent grain size for grains with various size located at different position relative to the riverbed are carried out .

文中根据试验结果给出了反滤层的等效粒径D（20）与土的分散度D之间的关系。

The paper also gives the relation between the equivalent diameter D20 of filter and the dispersive degree D of soil based on the analysis of the testing results .

此时，滤饼层阻力是膜污染阻力的主要来源，膜污染速率主要由活性污泥絮体的等效粒径和分形维数控制。

The major contributions of membrane fouling resistance came from specific cake resistance , and floc size and fractal dimension were the key factors affecting membrane fouling rate in this period .

对非均匀沙，当相对暴露度系数一定时，大于平均粒径的泥沙颗粒的等效粒径较同等粒径均匀沙的等效粒径小，容易起动；

It is concluded that the equivalent size of particles larger than average diameter in non uniform sediment movement is smaller than that for uniform sediment movement if the exposure coefficient is constant .

本文针对卵石颗粒及其起动特点，考虑卵石颗粒形状的影响，引入形状系数及相对暴露度系数，从卵石的等效粒径出发，采用滚动起动模式，导出了卵石起动流速公式。

Aiming at the grain of pebble and its incipient characteristic , considering the influence of pebble shape and the relative exposure degree , the formula of calculating the incipient velocity of pebbles is deduced based on the equivalent grain size of pebble and the rolling incipient mode .