The Distinct Element Method(DEM)is a discontinuum-based numerical method especially applicable to solve the discontinuity problems in jointed rock mass.

离散元法是基于不续性假设的数值方法,别适合于求解节理岩体中的非续性问题。

According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.

针对城市车辆全球定位系统(GPS)定位存在的不续性问题,提出了采用压电陀螺和里程仪组成的低成本航迹推算系统与GPS组合方案。