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.
應用半經騐方法對甚低頻（VLF）傳播相位的“C層傚應”進行了分析和建模，改進了VLF傳播相位預測函數。
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.
使用美國NCEP/NCAR再分析和中國實際降水的逐日資料，研究了1 998年夏季中國區域低頻降水傳播變化的機制。
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.
低頻聲音在空氣中傳播時，空氣分子振動小，摩擦比較慢，能量消耗少，所以傳播比較遠，通透力很強。