The exact complex stress functions are obtained for a infinite plate with a centrical crack or semi-infinite crack under concentrated forces at a certain point.

对具有中心裂纹或半无限长裂纹的无限大板在集中力作用下得到了精确的复变应力函数。

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Via variant of displacement harmonic oscillation, the exact electronic states in the semi-parabolic QW with an applied electric field are obtained.

通过位移谐振子变换，得到了系统中的电子态的精确解。

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This review first summarizes the general theory of spin diffusion in solids, including semi-classical description and the more exact approach, i.

首先介绍固态中自旋扩散的一般理论，包括半经典描述和建立在投影算子理论上的密度矩阵描述。

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Tottenham defender Pascal Chimbonda is relishing the chance to exact revenge upon Arsenal, who knocked out Spurs at the semi-final stage last season.

BBC: Arsenal & Spurs face cup showdown

Who wants to go out in the snow to get the exact screwdriver or drill bit, when you can usually find a semi-passable workaround?

FORBES: Do You Have the Right Tools to Succeed?