This paper introduces two methods of ultrasonic characterization of thin layers: pulse-echo and Lamb waves.
本文介绍了两种目前常用的材料薄层超声表征方法——纵波脉冲回波法和兰姆波法。
This paper introduces two methods of ultrasonic characterization of thin layers: longitudinal pulse-echo and Lamb waves.
介绍了两种常用的材料薄层超声表征方法———纵波脉冲回波法和兰姆波法。
Artificial intelligence principles are used to determine and analyse the defects according to pulse echo characteristics.
采用人工智能原理，根据脉冲回波特征，对缺陷作出判断和分析。
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