本文对如何避免过失误差，控制好偶然误差以提高风洞不同期试验精度提出了一些建议。
How to avoid mistaken error and control accidental error and some suggestions to advance the testing precision of the windtunnel in different period are presented in the paper.
方法采用同期非随机对照试验和个人深入访谈法， 对所建立的专科诊疗路径进行评价研究。
Methods The clinical pathway developed in urban hospital was evaluated by non-random concurrent controlled trial and individual depth interview.
结合实践对同期装置参数的整定及调整试验方法作详细介绍。
Combined with practice, the method of setting the parameters of the equipment and the method of adjusting and testing are introduced in detail.
方法采用同期非随机对照试验。
这次会议中讨论了很多临床试验，而且同期还有很多临床试验刚刚发表。
There are a number of clinical trials that are being discussed at this meeting and a number of others that have been recently published.
而论证强度最高的随机同期对照研究（RCT）在临床试验中的比例虽有上升，但总的比例仍很低，只占11.2 5 % 。
The proportion of RCT in clinical trials which has greater quality of research design increased, but proportion in total was still low, 11.25%.
k的农学效率在试验进行10年后nk处理平均为负值，同期npk处理中小麦k的农学效率却急剧增加，k成为作物高产的限制因素；
The aef of kwas negative in nk treatment while increased rapidly in npk treatment after10-year crop cultivation; k was also one of critical limited nutrients for crop yield .
k的农学效率在试验进行10年后nk处理平均为负值，同期npk处理中小麦k的农学效率却急剧增加，k成为作物高产的限制因素；
The aef of kwas negative in nk treatment while increased rapidly in npk treatment after10-year crop cultivation; k was also one of critical limited nutrients for crop yield .
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