对铜绿山矿采场冒顶的声发射特征和预报不准的原因进行了分析。
The sound emission characteristics and the causes for incorrect prediction of the stope roof fall at Tonglushan Mine were analysed.
本文通过视频信号与声频信号实验分析了燃气射流火焰的声发射特征。
Through the experimental analysis on the synchronous signal of audio and video of the premixed gas jet flame, the characteristic of the flame is studied.
从而提出，可根据混凝上受载后的声发射特征来评价和估计混凝土材料的损伤程度。
Therefore, it is proPOsed that the damage degree of concrete can be evaluated and estimated by using AE characteristics.
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