提出用重影线法判断两重影直线的相对位置和求解一般位置直线与平面相交求交点判别可见性的新方法。
A new method was put forward to find the intersection line and determine its visibility of general position lines and planes using overlapped projection lines.
用推广功的互等定理法，给出了求解复杂边界条件矩形板的弹性力学平面问题的一般近似解，并给出了计算实。
The method of reciprocal theorem is extended to find common probable solutions of plane problems of elasticity of the rectangular plate with various edge conditions.
将机车作为一个整体系统，用17个自由度描述机车在一般情况下横向平面的空间位置。
Suppose we view a locomotive as a whole system, the space configuration of each locomotive is described by a 17-freedomed in horizon surface.
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