找出了高速大功率柴油机曲轴在自然放置状态下的渗氮畸变规律，分析了曲轴的形状及渗氮工艺参数对曲轴畸变的影响。
The distortion law of high-speed diesel crankshafts during nitriding was studied. The influence of crankshafts shape and nitriding process parameters on the distortion was analyzed.
研究设计：对现有的在脊柱侧凸治疗中心进行治疗的患者的脊柱形状资料库进行聚类分析。
Study Design. Cluster analysis of existing database of spinal shape of patients attending a scoliosis clinic.
算例表明一些描述杆几何形状的变量在撞击分析中具有重要作用。
It is also found that some variables describing the geometrical shape of rods play an important role in impact dynamic system.
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