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A Report on the Breast Development of Healthy Females of the Right Age in Different Regions

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Open Journal of Obstetrics and Gynecology 2014年第13期4卷 782-786页

作者： Guosheng Su Zhongru Lin Lianhua Pan Rongwei Liang Binlin Bi Xiaolu Luo zhaoju fang Ju Zhao The Fourth People’s Hospital Nanning China People’s Hospital Guangnan County Yunnan China Maternal and Child Health Care Hospital Qinzhou China People’s Hospital Wenshan County Yunnan China

Objective: To observe the state of breast development of the healthy females of the right age in different regions. Methods: We randomly chose 1540 of 18 - 25 years old unmarried or married healthy females of the right age from both Guangxi and Yunnan provinces separately for regular checkups. Also we took notes on these females’ height and chest circumference and other indexes. According to the perfect chest circumference of Chinese females in relation to height, namely this relational expression—Standard Circumference = Height × 0.53, we evaluated the basic state of breast development of females from the two areas and then presented related research conclusions. Results: After the statistical analyses on every index of 1540 cases of healthy females of the right age from the two areas each, we found that the breast development of healthy women of the right age in Yunnan is more perfect than that of Guangxi, and in comparison to every index, there is a remarkable difference, and that is, P females of the right age is different in different areas. Some breasts are especially big;some are a little bit smaller;some are proper and some are relatively flat;also some breasts are strong while some are pendulous. In a word, there are some differences. These differences exist not only inChinabut also in every part of the world. The female whose chest circumference tends to be more close to the perfect is more likely to be more confident and more active, and also her life is full of sensibility and charm.

关键词： Area Healthy Of the Right Age Females Breast Development

内蒙古自治区541所中小学校教室环境卫生调查

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中国健康教育 2023年第5期39卷 451-453,473页

作者：赵菊芳高昇范耀春杨田李国峰张秀红内蒙古自治区综合疾病预防控制中心内蒙古呼和浩特010030

目的了解内蒙古自治区中小学校教室环境卫生状况,为进一步改善学校教学环境卫生提供参考依据。方法2021年采用随机抽样方法抽取全区541所中小学校的3246间教室。用SPSS 20.0统计软件进行分析教室人均面积、课桌椅分配符合率、黑板尺寸... 详细信息

目的了解内蒙古自治区中小学校教室环境卫生状况,为进一步改善学校教学环境卫生提供参考依据。方法2021年采用随机抽样方法抽取全区541所中小学校的3246间教室。用SPSS 20.0统计软件进行分析教室人均面积、课桌椅分配符合率、黑板尺寸、黑板反射比、黑板面平均照度、黑板面照度均匀度、课桌面平均照度、课桌面照度均匀度、噪声。结果教室人均面积、课桌椅分配符合率、黑板尺寸、黑板反射比、黑板面平均照度、黑板面照度均匀度、课桌面平均照度、课桌面照度均匀度、噪声的合格率分别为60.0%、31.6%、84.3%、52.8%、40.4%、75.6%、57.0%、70.7%、86.9%;中学的课桌椅分配符合率(38.2%)、教室人均面积合格率(66.1%)均高于小学(21.4%、50.5%)(χ^(2)=1014.9、χ^(2)=78.15,P<0.05);城区教室人均面积(55.4%)、黑板反射比合格率(46.6%)均低于郊县(61.7%、55.0%)(χ^(2)=10.39、χ^(2)=17.86,P<0.05)。结论内蒙古自治区中小学校教室环境卫生中教室人均面积、课桌椅符合率、黑板反射比较低,有待进一步改善。

关键词：教室环境中小学校卫生调查

Performance of novel 3D printing tools in removing coronary-artery calcification tissue

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Bio-Design and Manufacturing 2023年第4期6卷 390-404页

作者： Chuhang Gao zhaoju Zhu Zirui Huang Liujing Chen Lihong Lu Mingcheng fang Yao Liu Bingwei He College of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350001China Fujian Engineering Research Center of Joint Intelligent Medical Engineering Fuzhou 350001China Maynooth International Engineering College Fuzhou UniversityFuzhou 350001China Shengli Clinical Medical College of Fujian Medical University Fuzhou 350001China Department of Cardiology Fujian Provincial HospitalFuzhou 350001China Advanced Manufacturing Technology of Shanxi Key Lab North UniversityTaiyuan 030051China

Rotational atherectomy is an effective treatment for severe vascular calcification obstruction,and relies on high-speed grinding(typically 130,000–210,000 r/min)with miniature grinding tools to remove calcified tissue and restore blood ***,reports of intraoperative complications are common because of the grinding force,temperature,and debris directly acting on the body during the grinding process,which can easily cause damage to *** this study,three novel grinding tools were designed and fabricated and a series of experiments have been conducted to analyze the effects of tool geometry and parameters on grinding performance,that is,force,temperature,and specimen surface *** results show that these tools can effectively remove simulated calcified tissue and that they have two motions,rotation and revolution,in the *** higher rotational speeds,grinding force and temperature increase noticeably,while the amount of debris decreases *** addition,by observing the surface morphology of the specimens,we concluded that the material removal rate per unit time is influenced by both rotational speed and tool geometry,and that high rotational speed and a rough tool surface can improve the material removal rate efficiently.

关键词： Rotational atherectomy Grinding tool Grinding performance Parameter analysis

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弹载高密度T/R组件激光气密封装技术研究

电子工艺技术 2018年第2期39卷 76-78,105页

作者：房善玺王传伟栾兆菊中国电子科技集团公司第三十八研究所安徽合肥230088

弹载T/R组件组装密度高,侧壁连接器多,尺寸较航天产品大,且压氦检漏过程中4047铝合金盖板的弹性变形易造成焊缝气密失效,这就对弹载T/R的焊缝熔深和焊缝质量提出了更高的要求,同时封焊过程中焊缝附近的温升应严格控制在连接器低温钎焊... 详细信息

弹载T/R组件组装密度高,侧壁连接器多,尺寸较航天产品大,且压氦检漏过程中4047铝合金盖板的弹性变形易造成焊缝气密失效,这就对弹载T/R的焊缝熔深和焊缝质量提出了更高的要求,同时封焊过程中焊缝附近的温升应严格控制在连接器低温钎焊缝熔点以下。采用激光焊接技术对弹载高密度T/R组件进行了封焊试验,对不同激光能量封焊后的焊缝熔深和焊缝质量进行了研究和分析,并测试了焊缝附近关键位置的温升。在此基础上,获得了满足弹载高密度T/R封装需求的激光焊缝及相应参数,使组件封焊后整体气密性能满足并优于GJB548B要求。

关键词：高密度铝合金激光焊接熔深控制