The production of spin-polarized electrons and the modulation of polarization direction with liquid crystal variable retarder (LCVR) are discussed.

LCVR控制入射光子的偏振度，从而实现对自旋极化电子束极化方向的调制。

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Objective To explore the possible pathogenesis, the election and the effect of surgical treatment of severe tricuspid regurgitation(TR) after left cardiac valve replacement(LCVR).

目的探讨左心瓣膜置换术后三尖瓣重度关闭不全的机理及外科治疗选择及效果。

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Objective To explore the possible pathogenesis, the election and the effect of surgical treatment of severe tricuspid regurgitation(TR) after left cardiac valve replacement(LCVR).

目的探讨左心瓣膜置换术后三尖瓣重度关闭不全的机理及外科治疗选择及效果。

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