对于一般的六角链，一些重要类型的共轭分子的极值问题已得到解决。
For the general hexagonal chains, the extremal problem of some important types of conjugated molecules have been solved previously.
所提出方法对于内外齿轮啮合、齿数差异较大齿轮啮合等弹性共轭曲面问题的求解，有着重要的理论和实际意义。
It has theoretical and applicable significance in solving the elastic conjugate problems of gear engagement, such as inner gear meshing, or gear transmission with large difference in gear Numbers.
对于节块法，需要的是数学共轭方程，而不是物理共轭方程，但数学共轭方程求解比较困难。
The mathematical adjoint equation. not the physical adjoint equation, is required for nodal method, but it is rather too difficult to solve the former.
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