粒径分布曲线上小于该粒径的土含量占总土质量的10%的粒径称为有效粒径。经过大量试验资料统计发现,不均匀砂土的透水性与全部由这种砂土的累计含量为10%的颗粒(dm)所组成的均匀砂土的透水性相当。它可用来计算不均匀系数和曲率系数以及评价土的抗渗流稳定性及砂土振动液化的可能性。
目的探讨葡聚糖氧化铁磁性纳米颗粒的制备对其有效粒径和比饱和磁化强度的影响。
Objective To investigate the effect of preparation conditions on the effective diameter and saturation magnetization of dextran magnetic iron oxide nanoparticles.
应用多重分形的方法来描述土壤粒径分布性质是非常有效的。
It was very effective to describing the character of soil particle distribution by using multi-fractal method.
实践证明,该方法对较小粒径的颗粒检测有效。
The practice showed the method is effective for detecting the diameter of microparticles.
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