In communication fields wave orientation of antenna array can be changed by the phase of stimulus signal, which is called phased array.
最初在通信领域人们通过改变阵元激励信号的相位达到改变天线阵方向图波束指向的目的，从而相控阵天线应运而生。
Objective to explore the changes in respiration, artery blood pressure and heart rate induced by electric stimulus to the central en ds of rabbit sciatic nerves with successive monophase square wave.
目的观察以连续单相方波刺激兔坐骨神经中枢端所引起的呼吸、动脉血压和心率的变化。
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