1) fraction efficiency
粒径效率
1.
At present,the main method of testing air filters is fraction efficiency testing method with particle counter.
以粒子计数器为测试手段的粒径效率测试法是目前过滤器测试的主要方法。
2) fractional efficiency by particle size
分粒径计数效率
3) particle size effect
粒径效应
1.
According to modeling of prototype,it was deduced that as long as the footings used in centrifugal and gravitational tests were different,the bearing capacity obtained in centrifugal tests was always larger than that obtained in gravitational tests,namely particle size effects always existed in centrifugal tests.
通过对原型的模拟结果进行总结,得出对于承载力试验只要离心试验中的模型基础宽度与重力场试验中的不同,离心模型试验结果总大于重力场试验结果,即离心试验中总是存在粒径效应问题。
4) effective size
有效粒径
1.
The results shows that the effective size and uniform coefficient for SP-1,SP-2 and SP-C are respectively 161.
结果表明:SP-1有效粒径为161。
2.
In accordance with the effective size of nature soil conforming wostly with normal distribution, the physical signification and existing problem on the grading index of the soil grain are discussed.
针对天然土中粒径分布大多符合对数正态分布这一事实，在土粒级配曲线近似为正态分布这一前提下，探讨了目前广泛采用的粒度分析中级配指标的物理意义及其存在的问题，并提出了划分有效粒径的方法。
5) equivalent grain
等效粒径
1.
By analyzing influence of shape coefficient and exposure degree,the formulas for calculating equivalent grain and the incipient motion condition of non-uniform sediment are established by the relative exposure degree and shape coefficient.
根据非均匀沙颗粒的不均匀性,引入颗粒形状系数,通过分析泥沙颗粒形状系数和相对暴露度的影响,建立了等效粒径表达式;并通过泥沙起动受力分析,推导得到泥沙起动临界条件表达式。
2.
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.
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。
6) effective grain size
有效粒径
1.
Based upon permeability test the influences of the porosity, average pore size, effective grain size, mean particle diameter and coarse grain on its permeability are studied.
通过渗透试验,研究了无粘性土的孔隙率、平均孔隙直径、有效粒径、平均颗粒直径及较粗颗粒粒径等因素对其渗透特性的影响,并用所得修正公式的计算结果与前人的计算结果进行比较。
补充资料：配置效率和生产效率
在经济学上，经济发展的动力，或者说效率的来源，分为两类：一类是配置效率，二是生产效率。所谓配置效率，是指给定资源和技术的条件下，怎么样使资源从边际生产率低的地方流向边际生产率高的地方，从而使得资源和利用更合理、社会总价值达到最大;而生产效率是指如何通过技术进步提高每一种资源的生产率，也就是把社会的生产可行性边界向外移。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条