Since the quantity of the satellite is very limited, the precision of the result is low in dynamical measuring process.
由于“北斗”定位卫星数量极其有限，接收机在动态定位的精度上会出现很大的误差。
2
Based on the boundary variational theorem, the energy release quantity and energy release rate (dynamical crack extension force) along the crack boundary are obtained.
由此求得动态裂纹扩展时，沿裂纹边界的能量释放量和能量释放率(动态裂纹扩展力)。
3
Heat exchangers are the process equipments for exchanging the heat quantity. They were widely applied in the field of dynamical engineering and some other processing industrial departments.