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The features and applications in superprecision turnings of piezoelectric ceramic inching motion devices are introduced.

介绍了压电陶瓷机构性能特点及在超精密车削加工中多种。

The Microtremor Survey Method use Microtremor observation to distill surface wave, obtain it's dispersion curve and then get inversion to the underground structure.

勘探法是通过在野外设置一个观测台阵记录信号,然后从观测到信号中提取面,得到面散曲线,最后散曲线反演地质结构。