比奥固结平面有限元程序，用于计算地下水位及地面沉降-Biot' s consolidation plane finite element program, used to calculate the water table and land subsidence

根据物理学的毕奥-萨法尔定理，计算环形线圈周围电磁场的强度-According to physics, Biot- Safar theorem, calculate the intensity of electromagnetic field around the circular coil. .