Based on the spatial distribution of magnetic dipole, the equation of the normal component of leakage magnetic field on the tube surface under low-intensity field was derived.

根据磁偶极子空间磁场分布，导出了在外部垂直方向弱磁场下管状工件表面细长缺陷产生的弱磁场法向分量的计算公式。

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A new equation for calculating heat of vaporization of pure compounds at normal boiling points is derived with the residual function method improved by the new RK EOS which was proposed in 1980s.

应用八十年代提出的新r - K状态方程序，改进纯物质常沸点汽化热的剩余函数预测法，推导出纯物质常沸点汽化热的新计算方程序。

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