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

介绍了压电陶瓷微机构性能特点及在超精密车削加工种用途。

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

微勘探法是通过在野外设置一个观测台阵记录微信号,然后从观测到微信号提取面波,得到面波频散,后用频散反演地质结构。