The sludge yield coefficient increased with the increase of sludge loading rates.
污泥表观产率系数随污泥负荷的增加而增大；
2
The critical safety thickness of hidden cavity increases with the augment of hidden cavity section size, radial constringency, safety coefficient and surface loading.
暗穴临界安全厚度随着暗穴断面尺寸、暗穴半径收敛值、安全系数、地面荷载等参数的增大而增大。
3
In view of low milling efficiency, the effect of milling form, loadingcoefficientof materials, rotational speed of ball mill, milling time and grinding aid on milling efficiency was discussed.