Therefore, it has great significance to study control methods of suspension system.
因此，开展悬浮控制技术的研究具有重要意义。
Methods A random, double blind, and placebo control study was conducted.
方法采用随机双盲、安慰剂平行对照研究。
Another it study on the the control methods of normal acceleration.
另外研究了法向加速度的控制方法。
Methods a community based case control study was designed.
方法以社区为基础的病例对照研究。
OBJECTIVE To study the quality control methods of Yan Reqing mixture.
目的研究咽热清合剂的质量控制方法。
The methods of evaluation were mainly the control study(14.4%) and no control study(64.2%).
评价方法主要为无对照的研究（占64.2%）、有对照的研究（占14.4%）；
Methods Case control study and self-control study in Chinese herbal treatment group were conducted.
方法采用病例对照研究和中药治疗组自身前后对照研究。
方法断面对照研究。
方法断面对照研究。
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