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细长轴零件激光熔覆修复过程温度场数值模拟及变形研究 被引量:3
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作者 黄勇 马文涛 +2 位作者 张海明 于松林 潘江如 《机电设备》 2017年第4期28-34,37,共8页
以细长阶梯轴为研究对象,提出了一种全新的轴类零件建模和网格划分方法。通过数值模拟研究了阶梯轴的温度场分布、应力场分布及轴的变形结果。根据关键节点的温度变化规律,验证了激光熔覆加工能量密度集中,热影响区域小的特点。分析了... 以细长阶梯轴为研究对象,提出了一种全新的轴类零件建模和网格划分方法。通过数值模拟研究了阶梯轴的温度场分布、应力场分布及轴的变形结果。根据关键节点的温度变化规律,验证了激光熔覆加工能量密度集中,热影响区域小的特点。分析了细长轴在激光熔覆过程中变形的原因,结果表明约束对热变形的抑制有很好的作用。对实际工程应用有重要的指导意义。 展开更多
关键词 细长轴 激光熔覆 变形
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The Epidemiology of Induction of Labor among Women Aged 15 - 49 Who Delivered at Shaafi Hospital in Hodon District, Mogadishu Somalia 2020
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作者 Abdullahi Muse Mohamoud Sahra Mire Mohamed +4 位作者 Ahmed Mohamud Hussein Nafisa Ali Hassan Ruweyda Abdi Hassan Juweyriya Osman Abdullahi Naima Abdi Hashi 《Health》 CAS 2022年第4期418-431,共14页
Background: Induction of labor is an artificial termination utilized to decrease both maternal and neonatal morbidity and mortality. The study was aimed to assess the epidemiology of induction of labor among women age... Background: Induction of labor is an artificial termination utilized to decrease both maternal and neonatal morbidity and mortality. The study was aimed to assess the epidemiology of induction of labor among women aged 15 - 49 who delivered at Shaafi Hospital in Hodon District, Mogadishu Somalia 2020. Methodology: A cross-sectional and retrospective hospital-based study was conducted among 30 women aged 15 - 49 who had undergone induction of labor who were delivered at Shaafi Hospital Mogadishu during the period of the study from May-July 2020. Data were collected by interview method using structured questionnaire. Data analyzed was performed using Statistical Package for Social Science version 20. Results: The study showed that the majority of respondents 12 (40%) had undergone induction once time previously, followed by 8 (27%) had undergone induction previously two times, while 6 (20%) had undergone previously three times, 4 (13%) more than four times. 21 (70%) were delivered Spontaneous Vagina delivery (SVD), 6 (20%) were Cesarean section (CS) and 3 (10%) instrumental vaginal delivery. A total of (60%) were delivered in public hospitals, followed by (23%) were delivered in private hospitals and 5 (17%) home delivery. In addition the reasons of induction of labor a total of 27 (90%) were post term, followed by 2 (7%) were Intrauterine fetal death (IUFD), while few proportion of 1 (3%) were Pregnancy induced hypertension (PIH). Finally, the study revealed that the socio-demographic and obstetrical determinants such as age and daily meal intake as well as antenatal care visit and reasons for induction of labor e.g. Post term (Post-mature), Intrauterine fetal death (IUFD) and Pregnancy induced hypertension (PIH) showed significant association with their the induced labor (P Conclusion and Recommendations: The study recommended that ministry of health especially maternal and reproductive health unit should ensure that every pregnant woman has access to skilled maternal counseling and improve quality of antenatal, develop a national guideline of induction labor and continue training health workers at health facilities and monitor its implementations across the country. 展开更多
关键词 Induction LABOR shafi Hospital Mogadishu Somalia
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基于感应供电和2.4 GHz无线传输的船舶轴功率测量系统设计 被引量:1
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作者 薛增喜 钟文斌 +3 位作者 于亮 黄锋 曾志龙 左友道 《船舶工程》 CSCD 北大核心 2018年第2期79-82,共4页
为解决船舶轴功率测量中非接触供电、高精度扭矩采集和无线数据传输的实时性、可靠性问题,设计一套测量系统。该系统为实现非接触供电设计了一套无线感应供电装置,为实现高精度扭矩测量采用了24位高精度和低噪声AD转换芯片CS5532,为保... 为解决船舶轴功率测量中非接触供电、高精度扭矩采集和无线数据传输的实时性、可靠性问题,设计一套测量系统。该系统为实现非接触供电设计了一套无线感应供电装置,为实现高精度扭矩测量采用了24位高精度和低噪声AD转换芯片CS5532,为保证数据传输的实时性和可靠性采用了2.4 GHz无线数据传输技术。此外,通过扭矩校准试验来验证该系统的测量精度,试验表明该系统达到设计要求,满足船舶轴功率测量需求。 展开更多
关键词 感应供电 无线传输 扭矩 轴功率
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