中文摘要：

一个寓言的方程方法(PEM ) 基于分离算法被建议并且被用来在蒸发管空间获得地分发。这个方法不仅改进计算速度，而且提供灵活性调整模拟精确性。在海洋的波导结构的波浪繁殖的数字模拟被做。另外，起始的领域分发和进步的步是坚定的。在波导的损失模型通过数字答案被解决。由在管并且在正常大气的结构比较收音机波浪繁殖的特征，我们在海洋的波导在地平线察觉上分析收音机传播。

英文摘要：

A parabolic equation method （PEM）-based discrete algorithm is proposed and is used to obtain the field distribution in the evaporation duct space. This method not only improves the computing speed, but also provides the flexibility to adjust the simulation accuracy. Numerical simulation of the wave propagation in the oceanic waveguide structure is done. In addition, the initial field distribution and progressive steps are determined. The loss model in the waveguide is solved through the numerical solution. By comparing the characteristics of the radio wave propagation in the duct and in the normal atmospheric structure, we analyses the radio transmission over the horizon detection in the oceanic waveguide.