在相同球料比和球磨时间下，粉体平均颗粒尺寸随球磨转速增加而减小，其中的小颗粒数目也增多。
When charge ratio and milling time were constant, the average particle size of the powder decreased with the increase of rotation speed, while the amount of small size particles increased.
本文针对这种情况，提出了一种不用经过精细分割，而是基于边缘密度计算紧凑颗粒平均尺寸的算法。
Direct against this kind of situation, the paper presents a method to estimate average size of closely packed particles based on edge density without explicit segmentation.
研究表明：镶嵌在绝缘介质薄膜中的纳米锗颗粒的能带是量子化的，随着纳米锗粒子平均尺寸的减小，其吸收带隙增加，吸收带边蓝移的程度相应增大。
In comparison with that of the bulk Ge crystals, the nanocrystalline Ge show a blue shift of energy and the optical band gap increases with decreasing of the particle size of the nanocrystallites.
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