本文提出一个Z回波核磁共振(nmr)脉冲序列，可以获得三能级体系的纯偶极或纯四极谱。
Z echo NMR pulse sequence is proposed for using in measurement of pure dipole or quadrupole spectrum.
本文介绍一种微机控制的声速与温度关系测量系统。温度测量应用热电偶测温原理，声速测量采用脉冲回波技术。
This paper presents a system which combines the measurement of ultrasonic velocity and temperature based on a single board microcomputer.
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