有助于

The time domain electric field integral equation in conjunction with the reciprocity principle is applied to synthesize the transmitting impulse signals on condition that the receiving signals have already been known.

采用时域电场积分方程和互易原理相结合的方法，探讨了已知接收信号的情况下，脉冲发送信号的波形，并研究了视距和非视距两种传播路径对脉冲收发信号的影响。

Result: Early recurrences of AF occurred in 38 of 105 patients (36%) at a mean of 3.9±2.6 days after the procedure.

结果：在术后平均3.9±2.6天内，105例患者中38例早期房颤复发（36%）。