Ramanujan's modular equation

Analysing the propagation of EM wave for the circular tunnels and tunnels with a contained axial conductor, the formulas of attenuation and the mode equations are given and they are solved by the Muller s way.

对空圆形隧道及隧道中含有纵向导体的电磁波传输特性进行分析,给出了相应的衰减率计算公式及波模方程,并且采用Muller法对其进行求解。

From the equations of normal modes of crystals, the direction of the optical axis in biaxial crystals is found and the corresponding vectors of electric field and electric displacement are derived when lights travel in the direction of the optical axis.

从晶体的简正模方程出发，求得在双轴晶体中光轴方向，及当光线沿光轴方向行进时所对应的电场矢量和电位移矢量，并通过几何作图，证明所有折射光线在晶体内均在同一锥面上。