Moreover , this article also discussed how the variation of relative density and average grain diameter influenced the shear stress of sand and gravel layer 另外，顺便探讨了相对密度、平均粒径对砂砾石层剪应力的敏感度。
The results showed that cubic , dispersed co3o4 nano - particles with average diameter of 20nm were obtained under optimize conditions 结果表明，在优化的制备条件下可得到分散性较好、平均粒径为20nm左右的立方相纳米co _ 3o _ 4粒子。
3 . the electrocatalytic activities of the pt / c catalysts with 20 % pt and different average diameters of the pt particles for the ethanol oxidation were compared 发现pt的平均粒径为3二urn的pw催化剂的催化活性最高，其次是38 、 4
The partial least squares algorithm with limited memory is applied to model the soft senor on - line to predict the average particle size for the pta oxidation process 使用限定记忆部分最小二乘算法在线滚动建立平均粒径的软测量模型。
H igh pressure grinder the product size is adjustable in the range of 80 - 425 mesh . it is possible to product 30 - 80 mesh coarse powder through special device in the machine 高压微粉磨直接由20mm以下的进料粒度，就可一次性达到平均粒径
The results of theory simulation are close to that of experiments . the size distribution of the particles is in agreement with the lognormal distribution 理论模拟的结果表明，金属微粉的流速增大，颗粒的平均粒径减小，与实验结果趋势一致。
As the stirring rate increasing , the average diameter of capsules decreases exponentially and its distribution turns narrow , but its polydispersity index increases 随着转速的增加，胶囊的平均粒径呈指数关系减小，分布变窄，多分散指数却增加。
Tem micrographs show that the nano - sized powder is dispersing and the size is uniformity with a distribution of 10 - 20nm ( nio ) and 5 - 10nm ( zno ) 粉体的透射扫描电子显微镜照片显示，粉体的分散性好、粒径分布均匀，平均粒径nio为10 - 20nm ， zno为5 - 10nm 。
It reveals the influence of different cross - section , gas velocity , the height of bed materials , particle mean sizes and solid circulation rate on the particle movement 获得了不同测试截面的流场固粒速度，以及操作气速、床料高度和床料平均粒径等对固粒速度的影响规律。
The microstructures of these two kinds of material are characterized by xrd and tem . the average grain size of wo3 is 17 . 51nm and the average grain size of sno2 is 8 . 56nm 通过x射线衍射仪和透射电子显微镜进行材料的微观分析， wo _ 3的平均粒径大小为17 . 51纳米， sno _ 2的平均粒径大小为8 . 56纳米。
