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。
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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