根据材料的极限变形，导出管轴临界弯曲半径的计算方法。

According to the limit deformation, a method for calculation of the critical curvature of the tube is developed.

youdao

本文根据理论分析和实际测定推导出管坯壁厚计算公式及确定管坯壁厚的计算方法。

Formulas for calculating the shell wall thick-ness are derived and a method for calculating the wall thickness is also obtained based on related theoretical analyses and actual measuring results.

youdao

本文从双向负阻晶体管(BNRT)的等效电路出发，导出了BNRT的工作模式。

In this paper, the operation modes of the BNRT have been derived from its equivalent circuit.

youdao