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明:模型计算粒度分布与实测结果基本吻合,平均粒度的实验值与模型计算值误差在10%以内. 关键词:铝酸钠溶液;种分过程;粒度分布;模型 中图分类号:TF 821;O 795 文献标识码:A Model of particle size distribution model on agglomeration process of seeded...) Abstract: A model of particle size distribution model on the agglomeration process of seeded precipitation during aluminaproduction was contructed according to the population balance and mass balance......
represents the velocity of the particle i, vi∈(vmin, vmax); vmin and vmax are constants in the range of [0, 1]; Pi is the best previous position of particle i; N is the size of population; k... are c1=1, c2=1, while the size of particle swarm scale is i×j, and w changes according to Eqn.(10). After initialization of particle swarm position, the computation is carried on according to the steps......
for the isotropic nature of mechanical properties. The average size of the reinforced particle was 10 μm. The typical microstructure of experimental material is shown in Fig.1. Fig.1 Typical microstructure...] XIA Z, ELLYIN F. Multiaxial fatigue of an alumina particle reinforced aluminum alloy [J]. Internal Journal of Fatigue, 1998, 20: 51-56. [5] HAN N L, ZHANG G D. Effect of reinforcement size......
J. Cent. South Univ. Technol. (2011) 18: 1626-1637 DOI: 10.1007/s11771-011-0882-4 Reliability analysis of earth slopes using hybrid chaotic particle swarm optimization M. Khajehzadeh, M. R. Taha... by Hasofer and Lind and corresponding critical probabilistic slip surface, a hybrid algorithm combining chaotic particle swarm optimization and harmony search algorithm called CPSOHS is presented......
,粒度分布越集中,这与不同区域黄土的峰度特征相吻合.西安黄土与延安,米脂黄土相比,不均匀系数及曲率系数都较大,依据级配良好的标准(不均匀系数Cu≥5,曲率系数Cc=1~3)判定,延安黄土与米脂黄土的级配较好. 表3 西安,延安,米脂黄土的粒度参数与级配参数 Table 3 Particle size parameters and gradation parameters of Xi 'an, Yan 'an and Mizhi loess 表4 图解法沉积物粒度参数(Folk-Word)[4]与级配参数[27]的分级 Table 4 Classification of particle size parameters(Folk-Word)[4]and gradation parameters[27]of sediments by graphic method 3.2 粒度组成与渗透系数各......
is summarized as follows. Step 1: Initialization Take M as particle size, create initial group. Initialize inertia weight λ, acceleration coefficient c1 and c2, the maximal generation (GEN), the initial...J. Cent. South Univ. (2012) 19: 1302-1310 DOI: 10.1007/s11771-012-1142-y Lifetime prediction for tantalum capacitors with multiple degradation measures and particle swarm optimization based......
Effects of silver powder particle size on the microstructure and properties of Ag-Yb2O3 electrical contact materials prepared by spark plasma sinteringCHEN Xiaohua,JIA Chengchang,and LIU Xiangbing... fabricated by spark plasma sintering(SPS).The effects of silver powder particle size on the microstructure and properties of the samples were investigated.The surface morphologies of the sintered......
Optimization of light efficacy and angular color uniformity by hybrid phosphor particle size for white light-emitting diodeDong-Chuan Chen1,2,Zhu-Guang Liu2,Zhong-Hua Deng2,Chong Wang2,Yong-Ge...-particle-diameter phosphor powders were mixed together(hybrid phosphors)to balance light efficacy and angular color uniformity and pursue optimal results. Phosphor with small-particlediameter of 4 lm......
of fine dust is deposited in the preparatory wetting agent solution and disturbed in homogeneously. It is kept for a moment and some dust particles with rather large size have deposited. Then particle... but keeping other conditions constant, the particle size and distribution in the solutions are measured again and again with the same test method described above. The variations of particle sizes......
Preparation and particle size control of ultrafine sodium pyroantimonate CAO Sheng, YANG Xiyun, LI Jishen, XU Hui, SHI Xichang (School of Metallurgy and Environment, Central South University, Changsha 410083, China) Abstract: Ultrafine sodium pyroantimonate was prepared by combination of complexing and oxidation method with Sb2O3 as raw material. The structure, morphology and particle size......