To find out thoroughly the reasons of slope's unstability, earth stress has been measured at slope by means of technique of temperature compensation and automatic recording. 測量應用採用完全溫度補償技術和自動化記錄系統的空心包體應變計進行，得出了該地區地應力分佈的基本規律。
A novel optic bridge compensation technique using polarization splitting prism is presented in paper. 介紹了一種使用偏振分光稜鏡的新型光橋式補償技術。
