本研究设计了一种超声频脉冲等离子切割电弧发生系统，并通过实际切割试验，测试、分析了这种高频脉冲电弧的振动特性。
This study designed a system to generate ultrasonic-frequency pulsed plasma cutting arc, and experimentally investigated the vibration characteristics of the high frequency pulsed arc.
水流的初生空化噪声频率不仅与汽化压力和流体的特性有关，而且还与流体的环境压力分布和速度分布有关，与空化类型关系更为密切。
The inception cavitation does n'f only related the liquid vapouration pressure and its character, but also the pressure grad and velocity distribution.
利用超声频谱分析法对换能器进行频率特性分析，找出适合检测的最佳状态。
Spectrum feature analysis of the transducer apparatus is also conducted with this approach and thus achieves the best testing status.
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