传统测量机测量软件可以实现数据采集、仿真环境和手动示教等单一功能,但未实现自驱动一体化。本文基于Visual Studio 2015开发平台中的MFC搭建了软件整体框架,采用跨平台应用程序接口OpenGL研究了仿真环境的模型导入显示和待测坐标点...传统测量机测量软件可以实现数据采集、仿真环境和手动示教等单一功能,但未实现自驱动一体化。本文基于Visual Studio 2015开发平台中的MFC搭建了软件整体框架,采用跨平台应用程序接口OpenGL研究了仿真环境的模型导入显示和待测坐标点抓取。根据抓取的坐标点数据,将MFC和MATLAB软件进行数据链接,以实现测量机的运动学逆解及其路径规划。分别采用CSerial类、socket类进行串口通信和以太网通信,将逆解得到的关节转角参数和运动参数传输至下位机控制器系统,驱动关节臂进行目标点测量。将下位机系统采集的测量数据反馈至上位机交互界面,根据MATLAB软件编写的算法进行误差补偿,并利用SQL数据库链接实现数据存储、查询、插入和删除等功能,完成高效实时的数据传输。实验结果表明,测量系统软件可以有效地完成三维模型显示与坐标点抓取,两种通信方式均可实现数据的传输和读取,能存储采集到的数据并调用MATLAB函数进行处理,完成误差补偿,提高关节臂的测量精度,最终实现自驱动功能为一体。展开更多
目的:翻译并修订阿尔茨海默病相关生活质量量表(Alzheimer’s disease-related quality of life scale,ADRQL),并对其进行信度和效度评价。方法:采用Brislin跨文化研究翻译模式对英文版ADRQL量表进行翻译;通过专家小组讨论和预调查对翻...目的:翻译并修订阿尔茨海默病相关生活质量量表(Alzheimer’s disease-related quality of life scale,ADRQL),并对其进行信度和效度评价。方法:采用Brislin跨文化研究翻译模式对英文版ADRQL量表进行翻译;通过专家小组讨论和预调查对翻译量表进行文化调适;采用便利抽样方法,对2022年12月至2023年6月在上海瑞金医院和多家社区卫生中心就诊的阿尔茨海默病及其他类型痴呆患者照护者221人进行调查。采用Cronbach’sα系数测量结果相关性评价量表的信度;采用专家评定法评价量表的内容效度,运用探索性因子分析评价量表的结构效度。结果:中文版ADRQL量表Bartlett’s球形检验χ2=2466.634,P<0.001,KMO为0.727,探索性因子分析提取8个公因子,累计方差贡献率为47.37%;量表水平的内容效度指数为0.99,条目水平内容效度指数为0.83~1.00;总量表的Cronbach’sα系数为0.809,分半信度系数0.860。结论:中文版ADRQL具有较好的信效度,可用于评估我国阿尔茨海默病及其他类型痴呆患者的相关生活质量评估。展开更多
This paper presents a model of fatigue crack growth in a welded joint and a two-dimensional model of anodic dissolution based on Donahue model and anodic dissolution mechanism,respectively.In addition,a model for pred...This paper presents a model of fatigue crack growth in a welded joint and a two-dimensional model of anodic dissolution based on Donahue model and anodic dissolution mechanism,respectively.In addition,a model for predicting the corrosion fatigue crack growth rate in welded joints of steel marine structures is established and crack growth mechanisms are analyzed.The results show that during early stages of crack growth,corrosion fatigue crack growth rate in welded joints is mainly controlled by corrosion action,whereas cyclic loading becomes more influential during the later stage of crack propagation.Loading frequency and effective stress ratio can affect rupture period of protective film at the corrosion fatigue crack tip and the length of corrosion crack increment,respectively,which changes the influence of corrosion action on crack growth rate.However,the impact of stress amplitude on crack growth rate is only significant when crack propagation is caused by cyclic loading.Welding residual stress not only improves the effective stress ratio of cyclic loading,but also promotes crack closure and increases corrosion fatigue crack growth rate in welded joints.Compared to corrosion action,welding residual stress has a more significant influence on crack growth caused by cyclic loading.展开更多
文摘传统测量机测量软件可以实现数据采集、仿真环境和手动示教等单一功能,但未实现自驱动一体化。本文基于Visual Studio 2015开发平台中的MFC搭建了软件整体框架,采用跨平台应用程序接口OpenGL研究了仿真环境的模型导入显示和待测坐标点抓取。根据抓取的坐标点数据,将MFC和MATLAB软件进行数据链接,以实现测量机的运动学逆解及其路径规划。分别采用CSerial类、socket类进行串口通信和以太网通信,将逆解得到的关节转角参数和运动参数传输至下位机控制器系统,驱动关节臂进行目标点测量。将下位机系统采集的测量数据反馈至上位机交互界面,根据MATLAB软件编写的算法进行误差补偿,并利用SQL数据库链接实现数据存储、查询、插入和删除等功能,完成高效实时的数据传输。实验结果表明,测量系统软件可以有效地完成三维模型显示与坐标点抓取,两种通信方式均可实现数据的传输和读取,能存储采集到的数据并调用MATLAB函数进行处理,完成误差补偿,提高关节臂的测量精度,最终实现自驱动功能为一体。
文摘目的:翻译并修订阿尔茨海默病相关生活质量量表(Alzheimer’s disease-related quality of life scale,ADRQL),并对其进行信度和效度评价。方法:采用Brislin跨文化研究翻译模式对英文版ADRQL量表进行翻译;通过专家小组讨论和预调查对翻译量表进行文化调适;采用便利抽样方法,对2022年12月至2023年6月在上海瑞金医院和多家社区卫生中心就诊的阿尔茨海默病及其他类型痴呆患者照护者221人进行调查。采用Cronbach’sα系数测量结果相关性评价量表的信度;采用专家评定法评价量表的内容效度,运用探索性因子分析评价量表的结构效度。结果:中文版ADRQL量表Bartlett’s球形检验χ2=2466.634,P<0.001,KMO为0.727,探索性因子分析提取8个公因子,累计方差贡献率为47.37%;量表水平的内容效度指数为0.99,条目水平内容效度指数为0.83~1.00;总量表的Cronbach’sα系数为0.809,分半信度系数0.860。结论:中文版ADRQL具有较好的信效度,可用于评估我国阿尔茨海默病及其他类型痴呆患者的相关生活质量评估。
基金Project(2018M643852)supported by the Postdoctoral Science Foundation of ChinaProjects(30110010403,30110030103)supported by Equipment Pre-Research Project,ChinaProject(51979280)supported by the National Natural Science Foundation of China。
文摘This paper presents a model of fatigue crack growth in a welded joint and a two-dimensional model of anodic dissolution based on Donahue model and anodic dissolution mechanism,respectively.In addition,a model for predicting the corrosion fatigue crack growth rate in welded joints of steel marine structures is established and crack growth mechanisms are analyzed.The results show that during early stages of crack growth,corrosion fatigue crack growth rate in welded joints is mainly controlled by corrosion action,whereas cyclic loading becomes more influential during the later stage of crack propagation.Loading frequency and effective stress ratio can affect rupture period of protective film at the corrosion fatigue crack tip and the length of corrosion crack increment,respectively,which changes the influence of corrosion action on crack growth rate.However,the impact of stress amplitude on crack growth rate is only significant when crack propagation is caused by cyclic loading.Welding residual stress not only improves the effective stress ratio of cyclic loading,but also promotes crack closure and increases corrosion fatigue crack growth rate in welded joints.Compared to corrosion action,welding residual stress has a more significant influence on crack growth caused by cyclic loading.
