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GMAW焊接过程监测Kohonen神经网络系统 被引量:12
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作者 武传松 polte T Rehfeldt D 《机械工程学报》 EI CAS CSCD 北大核心 2002年第1期131-134,共4页
实时测量熔化极气体保护焊(GMAW)焊接过程中的电参数,研制自组织特征映射神经网络(Kohonen神经网络),直接依据不同焊接工艺条件下焊接电压的概率密度分布曲线(PDD)以及短路过渡时间的频数分布曲线(CFD),自... 实时测量熔化极气体保护焊(GMAW)焊接过程中的电参数,研制自组织特征映射神经网络(Kohonen神经网络),直接依据不同焊接工艺条件下焊接电压的概率密度分布曲线(PDD)以及短路过渡时间的频数分布曲线(CFD),自动识别出焊接过程中的各种干扰信号。 展开更多
关键词 过程监测 神经网络 熔化极气体保护焊 焊接自动化
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基于12维统计矢量的GMAW焊接过程监测模糊神经网络系统 被引量:4
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作者 武传松 胡庆贤 +2 位作者 孙俊生 polte T. Rehfeldt D. 《机械工程学报》 EI CAS CSCD 北大核心 2004年第1期151-154,共4页
将熔化极气体保护焊(GMAW)焊接电参数概率密度分布(PDD)和时间频数分布(CFD)数值信息进行进一步的处理,用其平均值、方差和标准方差等统计参数,构成12维矢量S12,描述不同工艺条件下的GMAW焊接过程。综合神经网络和模糊技术的优点,建立... 将熔化极气体保护焊(GMAW)焊接电参数概率密度分布(PDD)和时间频数分布(CFD)数值信息进行进一步的处理,用其平均值、方差和标准方差等统计参数,构成12维矢量S12,描述不同工艺条件下的GMAW焊接过程。综合神经网络和模糊技术的优点,建立了模糊神经网络系统FKCN,对8种工艺条件下24个GMAW焊接试验的识别成功率达到了100%。 展开更多
关键词 过程监测 模糊神经网络 智能识别 熔化极气体保护焊 统计矢量
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Mobility after Heart Surgery: What Are Influential Factors?
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作者 Gabriela Lago Rosier Gleide Gllcia Gama Lordello +5 位作者 Marcela Araujo de Moura Larissa Santana Correia Luana Lais Silva polte Giulliano Gardenghi Luis Claudio Correia Patricia Alcantara Doval de Carvalho Viana 《Journal of Pharmacy and Pharmacology》 2018年第4期429-435,共7页
Objective: To analyze postoperative mobility after cardiac surgery. Methods: Observational study in patients, aged 〉 18 years, undergoing myocardial revascularization and/or valvular heart surgery, hospitalized in ... Objective: To analyze postoperative mobility after cardiac surgery. Methods: Observational study in patients, aged 〉 18 years, undergoing myocardial revascularization and/or valvular heart surgery, hospitalized in a Brazil hospital. The data collection took place between April 2016 and March 2017. On admission to the ward, patients received a calibrated pedometer. They were asked to use the device during five consecutive days, yet only three days of full use were analyzed. Results: Analyzed were data of 87 individuals with mean age of 58.70 ~ 12.59 years, 52 (59.8%) of them were males. Regarding surgery, 53 (60.9%) underwent myocardial revascularization. The median number of steps was 738 (185-1,557), which showed a weak and inverse correlation with the length of stay in the intensive care unit (r = -0.3/p = 0.02), however, it was not statistically significant when related to clinical and surgical data. Male patients had a better mobility when compared to patients of the female sex (p = 0.04). Conclusions: Individuals who had a longer stay in the intensive care unit, as well as females, had a lower mobility in the ward. The mobility did not show a relation with intra- and postoperative factors. 展开更多
关键词 Cardiac surgery PHYSIOTHERAPY ambulation.
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