Fluidization Characteristics of Silicon Particles with a Wide Size Distribution

Fluidization characteristics of silicon particle system are studied by the pressure fluctuation method.The existence of fine particles in the system can improve fluidization. Silicon particles with a wide size distribution,preferably with some fines, behave as Group A particles according to Geldart classification, although the system belongs to Group B actually. The system is also approved to be suitable for organochlorosilane monomer production using a fluidized bed reactor. Experimental data obtained in this work are important for the design and operation of commercial fluidized bed reactors for the production of organochlorosilane monomers.

丘陵地区DEM与坡度的尺度效应分析

为了揭示丘陵地区海拔高程和坡度的尺度效应特征,本文以丘陵地区遂宁市船山区为试验区,以1∶1万比例尺的矢量数据生成多尺度DEM及相应的坡度数据。通过比较不同尺度下的高程频率和坡度频率分布,揭示出丘陵地区高程和坡度的尺度效应特征和规律。提出了用于测定尺度转换精度损失的标准频率差的概念,揭示了高程误差和坡度误差分别与尺度在0.01水平上存在着显著正相关关系,并对其进行了拟合建模,其模型分别为:y=-0.0004 x2+0.0058x-0.0042和y=-0.0001 x2+0.0032x-0.0025,模型均在0.01的水平上显著。该研究对丘陵地区地形分析中最佳尺度的选取具有重要意义,对丘陵地区土地的精细利用决策也具有重要意义。