结果：与治疗前比较，中药组与西药组的平均转速、持续时间均下降且有统计学意义；
Results: comparing with before treating, the traditional Chinese drug group and western medicine group's average revolving speed and keeping on time are all descend and have the statistics meaning.
根据这一振动模型，推导了齿轮副的平均单齿刚度、单对轮齿啮合综合刚度、有效质量、固有频率与临界转速等一系列计算公式。
The model is used to understand a series of formulae, for example, mean single tooth stiffness, gear pair mesh synthesizing stiffness, effective mass, nature frequency and critical rotating speed.
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.
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