The mathematical model of ruled helicoids on torus is constructed and two expression methods of ruled helicoids are discussed.
基于圆柱螺旋面和圆环螺旋线的形成原理,构建了圆环直纹螺旋面的数学模型,讨论了圆环直纹螺旋面的两种表示方法。
Film stability of herringbone grooved journal bearing with micro-polar lubricants;
微极性流体螺旋槽径向轴承油膜稳定性