The perfect matched layer (PML) technique is used in ADI-FDTD calculation for the first time. The expressions for the exponential time-stepping algorithm in PML are derived.

首次把完全匹配层(PML)边界条件应用到adi FDTD计算中，采用幂指数形式的时间步进算法，推导了相应的迭代公式。

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The time-stepping FEM model for the dynamic analysis of power system is established considering the nonlinear characteristics of internal generators and typology structures of external circuit.

建立了既考虑发电机内部非线性又考虑外部电路拓扑结构的用于系统动态分析的时步有限元模型。

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Calzaghe - who had won the award three times previously - cemented his place as one of boxing's all-time greats by stepping up from the super-middleweight division he ruled for more than a decade to beat American greats Bernard Hopkins and Roy Jones Jr at light-heavyweight.

BBC: Williams awarded BBC Wales crown

Joe Calzaghe - who has won this award the last two years - cemented his place as one of boxing's all-time greats by stepping up from the super-middleweight division he ruled for more than a decade to beat American greats Bernard Hopkins and Roy Jones Jr at light-heavyweight.

BBC: Wales Sports Personality 2008

In Britain, which has long welcomed foreign direct investment and for a time served as a stepping-stone for outsiders who wanted to crash the unfriendly European market, inward investment has been a particular boon.

ECONOMIST: Buttonwood