Adopting the active control can meet the isolation demand high accuracy for tiny vibration induced by the gravitation variation between the sun and the earth.
目前对于太阳和地球引力变化引起的微振动，采用先进的主动控制能达到高精度的隔振要求。
2
The crust magnetic field, or lithospheric magnetic field, can be deduced by subtracting the main field, variation field and its induced counterpart from the total field.
从全球磁场减去地核主磁场和变化磁场及其感应磁场后，就得到岩石圈磁场，又称地壳磁场，或地磁异常。
3
The variation of stress state and strain state induced by tunnel shield driving in soils is studied, and the variation of soil mechanical properties is studied too in this paper.