While carrying out ray tracing in mountains, altiplanos, or other rugged topography regions, one must make some improvements. 在山地和高原等地表起伏地區進(jìn)行射線(xiàn)追蹤時(shí)，需要做一些細節上的改進(jìn)。
Besides, a global ray-tube tracing method is presented, which is to trace the global wave tubes instead of the many small ray tubes for simulating wave propagations in urban areas. 另外，本論文提出廣射線(xiàn)柱追蹤法，其中乃是追蹤整體射向建筑物表面之輻射電波，有別于一般射線(xiàn)追蹤法將發(fā)射天線(xiàn)的輻射電波以多個(gè)小射線(xiàn)柱來(lái)模擬。
