The disturbing point massds model has aroused great interest in geodetic community as a method of approximating the external gravity field of the earth.
扰动质点模型作为地球外部重力场的一种数值逼近方法，已经引起人们极大的兴趣。
When enterprise power supply system becomes isolated after fault occurred, the best method is finding a suitable grid-connected point to connect with external power grid to maintain stable.
大型工业企业供电网的部分电力负荷由自备电厂供应，外部电网构成了企业供电系统的可靠后备。
In order to increase the coverage rate of NEBs to the event region, the external event point (EP) was introduced and the calculation method of the EP was also discussed in detail.
为了增加对事件边界的覆盖率，EBTAC算法引入了事件外边界点(ep)并给出了其计算方法。
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