Conclusion: in 3d-flash sequences, water excitation technique as an alternative to fat suppression can shorten scan time significantly, without decreasing image quality.

结论：3d - FLASH序列合用水激发技术代替脂肪抑制可显著缩短扫描时间，而不降低图像质量。

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The flow induced oscillation in a cavity exposed to external high speed flow and its suppression by means of sound excitation at the leading edge of the cavity are experimentally studied.

实验研究了矩形空腔在外部高速气流作用下诱导的空腔内流动振荡问题，以及从空腔前缘加入纯音声激励以抑制空腔内流动振荡的技术。

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Analysis of dynamic simulation shows that this optimal excitation system can increase the system damping, improving stability, with good low-frequency oscillation suppression and robustness.

动态仿真分析表明，设计出的最优励磁系统能够有效地增加系统的阻尼，提高系统的稳定性，且能够很好地抑制系统的低频振荡，并具有较好的鲁棒性。

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