侧面波脉冲传播
lateral pulse wave
lateral pulse wave propagation
地面散射传播
ground scatter propagation
球面电磁波传播
propagation of spherical electromagnetic wave
数字电视地面广播传输系统
digital television terrestrial broadcasting system
数字视频广播地面传输
Digital Video Broadcasting for Terrestrial Transmission
(改进)环形反向传播网络
improved) circular ba ck-propagation network
使用与满足传播理论
The Uses and Satisfaction Communication Theory
《生命知识》传播
spreading fact about life
BP反向传播人工神经网络
BP Back Propagation Artificial Neural Network Mode