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轮毂检测建模及测量数据处理方法研究
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作者 刘业峰 王继轩 +2 位作者 王富状 赵元 孙福英 《计算机测量与控制》 2019年第11期34-38,共5页
轮毂作为车辆行驶状况的重要保证,其复杂的形状结构为其尺寸检测带来困难;文章提出一种对关键特征打点建模的方法对轮毂的主要尺寸进行检测;给出了通过打点建立特征图形的方法,利用面-圆-圆的方法建立坐标系的具体策略,给出轮毂主要尺... 轮毂作为车辆行驶状况的重要保证,其复杂的形状结构为其尺寸检测带来困难;文章提出一种对关键特征打点建模的方法对轮毂的主要尺寸进行检测;给出了通过打点建立特征图形的方法,利用面-圆-圆的方法建立坐标系的具体策略,给出轮毂主要尺寸测量和数据分析的步骤,提出解决测量数据误差的方法,以提高测量的准确性和科学性;通过多次试验分析,实现了轮毂宽度、直径、PCD及螺栓孔直径、中心孔直径、偏距、行位误差等主要参数的测量;文章所提出的测量方法简单易行、测量效率高、结果准确,可以提高轮毂在生产过程中的检测效率和精度,对轮毂的生产具有重要意义。 展开更多
关键词 三坐标测量机 轮毂 PC-DMIS 误差处理
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Effectiveness and safety of auricular acupoint bloodletting in treatment of insomnia:an assessor-blinded pilot randomized controlled trial 被引量:2
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作者 Ni Jing wang Bin +5 位作者 wang fuzhuang Zhou Hongwei Shi Huaxin Zhang Ninan Zhao Hong Xie Qi 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2018年第5期763-768,共6页
OBJECTIVE: To evaluate the effectiveness and safety of auricular acupoint bloodletting in treatment of insomniaMETHODS: Participants(n = 60) with insomnia were randomized into two groups to receive treatment of auricu... OBJECTIVE: To evaluate the effectiveness and safety of auricular acupoint bloodletting in treatment of insomniaMETHODS: Participants(n = 60) with insomnia were randomized into two groups to receive treatment of auricular acupoint bloodletting: low frequency group, 1 times/week for five weeks(n = 30);high frequency group, 2 times/week for two weeks(n = 30). The following outcomes were measured blindly at baseline, after first treatment, 4 weeks,and 8 weeks: Pittsburgh sleep quality index scale(PSQI).RESULTS: The groups were balanced at baseline for insomnia and demographic characteristics. There were no significant differences between the groups in terms of any of the outcomes, at the first follow-up time point. However, the therapeutic effect of LFG(once per week) is obviously lower than that of HFG(twice per week). In addition, there was no significant difference in the side effects between the two groups.CONCLUSION: The treatment of insomnia with different frequencies of auricular acupoint bloodletting is effective and has less side effects. More reasonable treatment frequencies are worth further study. 展开更多
关键词 INSOMNIA AURICULAR ACUPOINT BLOODLETTING RANDOMIZED controlled trials Frequency
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