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转动算符方法用三个Euler角来表征特形脉冲,它是描述特形脉冲自旋动力学的有效方法.本文利用四元数的概念,通过四元数元进行转动合成,从而给出一种计算特形脉冲Euler角的简捷方法Basing on the three Euler angles, the rotation operator approach is efficient to describe spin dy-namics of arbitrary shaped selective pulse. In this paper, a quaternion is employed so that the product of rotations is well performed. Hence a simple method is given for the calculation of the Euler angles for shaped pulses.
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