演出开始时,呜铃启幕.The curtain was rung up at the beginning of the play.秋季房交会昨日在星海湾启幕, 现场依旧热闹.The autumn room rendezvous began yesterday the star bay, the scene was as before lively....
移频键控是短波数字通信中常用的一种调制方式.The Frequency Shift Keying modulation is widely used in HF digital communication.本文研究了一种基于自适应算法的解调差分相移键控(DPSK)信号的方法.This paper deal with the DPSK demodulation method based on adaptive algorithm.相移键控...