low-frequency propagation

基本解释

Using half-empiric method, C-layer effect of very low frequency (VLF) propagation phase is analyzed and modeled, moreover, the function of VLF phase prediction is modified.
应用半经验方法对甚低频（VLF）传播相位的“C层效应”进行了分析和建模，改进了VLF传播相位预测函数。
In the context of NCEP/NCAR reanalysis and real precipitation daily data in 1998, propagation variational mechanisms of low-frequency rainfall (LFR) over China in 1998 are studied.
使用美国NCEP/NCAR再分析和中国实际降水的逐日资料，研究了1 998年夏季中国区域低频降水传播变化的机制。
Low-frequency sound propagation in the air, the air molecule vibration is small, the friction is slower, less energy consumption, so distant spread, transparent and full of vitality.
低频声音在空气中传播时，空气分子振动小，摩擦比较慢，能量消耗少，所以传播比较远，通透力很强。