为了保证运维阶段桥梁结构安全,提升桥梁运维工作的效率,开展公路混凝土梁式桥运维阶段建筑信息模型(building information modeling,BIM)技术应用研究。在对公路桥梁现行编码体系进行扩展的基础上,提出1种参数化快速建模方法,以快速完...为了保证运维阶段桥梁结构安全,提升桥梁运维工作的效率,开展公路混凝土梁式桥运维阶段建筑信息模型(building information modeling,BIM)技术应用研究。在对公路桥梁现行编码体系进行扩展的基础上,提出1种参数化快速建模方法,以快速完成桥梁构件族的创建与整体模型的集成。借助Autodesk Revit软件应用程序编程接口(application programming interface,API),采用C#语言,开发公路混凝土梁式桥智慧运维状态评估系统,以实际工程应用进行验证分析。研究结果表明:全面统一的桥梁信息编码体系,能够提高桥梁信息统计与检索效率;提出的快速建模方法能够显著减少建模工作量,建模时间较传统建模方法可减少60%,并保证模型的准确性与规范性;运维状态评估系统能够实现养护数据的充分利用与桥梁评定工作的自动化,通过对桥梁运维信息的有效组织,实现服役性能的长期追踪,从而确保运营期桥梁结构状态安全稳定。研究结果可为公路混凝土梁式桥运维管理提供技术支撑,提升桥梁运维的数字化水平。展开更多
目的:分析图像存档和传输系统(PACS)–医院信息系统(HIS)影像数据库与多学科综合诊疗(MDT)联合以问题为基础的学习(PBL)教学法在儿童癫痫影像教学中的价值。方法:选取2022年1月~2024年2月于我院影像规培医师121人作为研究对象,随机分为...目的:分析图像存档和传输系统(PACS)–医院信息系统(HIS)影像数据库与多学科综合诊疗(MDT)联合以问题为基础的学习(PBL)教学法在儿童癫痫影像教学中的价值。方法:选取2022年1月~2024年2月于我院影像规培医师121人作为研究对象,随机分为对照组61人、观察组60人。教学过程中,对照组采用MDT模式下的PBL教学模式教学,观察组采用PACS-HIS影像数据库结合MDT模式下的PBL教学。分析不同的教学方式对住培生的学习行为、教学质量、教学效果、教学满意度的影响。结果:观察组的教学模式对住培生的学习行为、教学质量、教学效果、教学满意度明显优于对照组,差异均具有统计学意义(P 0.05)。结论:ACS-HIS影像数据库与MDT模式下的PBL教学并用可明显提高儿童癫痫影像教学质量、教学效果,改变规培生学习行为。适合在广大基层医疗单位推广,以提高基层医务人员对儿童癫痫的影像诊断水平。Objective: This paper aims to analyze the value of problem-based learning (PBL) teaching method combined with Picture Archiving and Communication System (PACS)-Hospital Information System (HIS) image database and Multidisciplinary Comprehensive Diagnosis and Treatment (MDT) in the teaching of pediatric epilepsy imaging. Methods: 121 radiologists trained in our hospital from January 2022 to February 2024 were selected as the research subjects and randomly divided into a control group of 61 and an observation group of 60. During the teaching process, the control group used PBL teaching mode under MDT mode, while the observation group used PACS-HIS image database combined with PBL teaching under MDT mode. This paper analyzed the impact of different teaching methods on the learning behavior, teaching quality, teaching effectiveness, and teaching satisfaction of resident trainees. Results: The teaching mode of the observation group had a significant impact on the learning behavior, teaching quality, teaching effectiveness, and teaching satisfaction of resident trainees compared to the control group, and the differences were statistically significant (P < 0.05). Conclusions: The combination of ACS-HIS imaging database and PBL teaching under MDT mode can significantly improve the quality and effectiveness of pediatric epilepsy imaging teaching, and change the learning behavior of trainees. And it is suitable for promotion in grassroots medical units to improve the imaging diagnosis level of pediatric epilepsy among grassroots medical personnel.展开更多
土体的宏观性质主要受其微观结构和孔隙特征的影响。查明土体在冻融等外部条件影响下的微观演化规律对岩土工程研究具有重要意义。草炭土作为季节性冻土和特殊土,由于其腐殖质和植物纤维含量较高,具有较高的压缩性和较低的强度。因此,...土体的宏观性质主要受其微观结构和孔隙特征的影响。查明土体在冻融等外部条件影响下的微观演化规律对岩土工程研究具有重要意义。草炭土作为季节性冻土和特殊土,由于其腐殖质和植物纤维含量较高,具有较高的压缩性和较低的强度。因此,以草炭土为研究对象,通过土工试验、核磁共振(nuclear magnetic resonance,简称NMR)、X射线计算机断层扫描(computed tompography,简称CT)和扫描电子显微镜(scanning electron microscope,简称SEM)等方法研究了草炭土的微观结构、孔隙特征和冻融效应。基于岩土力学和核磁共振理论,完成CT切片和SEM的微观图像分割,以识别空气孔隙和储水孔隙。结合微观图像和成分分析,草炭土的微观结构揭示了有机质组分是能够容纳和传导水分的土壤基质。冻融后草炭土的孔径分布表现为中孔比例增加,孔隙总体数量显著增加。因此,量化微观参数表明冻融后草炭土的孔隙连通性增强,孔隙形状复杂程度降低,渗透性增强。通过对非饱和土理论计算的验证表明,核磁共振方法能够有效地表征冻融土渗透性的变化。研究成果可作为高有机质、高纤维含量土壤研究的基础,也可作为草炭土分布区工程建设的参数依据。展开更多
文摘目的:分析图像存档和传输系统(PACS)–医院信息系统(HIS)影像数据库与多学科综合诊疗(MDT)联合以问题为基础的学习(PBL)教学法在儿童癫痫影像教学中的价值。方法:选取2022年1月~2024年2月于我院影像规培医师121人作为研究对象,随机分为对照组61人、观察组60人。教学过程中,对照组采用MDT模式下的PBL教学模式教学,观察组采用PACS-HIS影像数据库结合MDT模式下的PBL教学。分析不同的教学方式对住培生的学习行为、教学质量、教学效果、教学满意度的影响。结果:观察组的教学模式对住培生的学习行为、教学质量、教学效果、教学满意度明显优于对照组,差异均具有统计学意义(P 0.05)。结论:ACS-HIS影像数据库与MDT模式下的PBL教学并用可明显提高儿童癫痫影像教学质量、教学效果,改变规培生学习行为。适合在广大基层医疗单位推广,以提高基层医务人员对儿童癫痫的影像诊断水平。Objective: This paper aims to analyze the value of problem-based learning (PBL) teaching method combined with Picture Archiving and Communication System (PACS)-Hospital Information System (HIS) image database and Multidisciplinary Comprehensive Diagnosis and Treatment (MDT) in the teaching of pediatric epilepsy imaging. Methods: 121 radiologists trained in our hospital from January 2022 to February 2024 were selected as the research subjects and randomly divided into a control group of 61 and an observation group of 60. During the teaching process, the control group used PBL teaching mode under MDT mode, while the observation group used PACS-HIS image database combined with PBL teaching under MDT mode. This paper analyzed the impact of different teaching methods on the learning behavior, teaching quality, teaching effectiveness, and teaching satisfaction of resident trainees. Results: The teaching mode of the observation group had a significant impact on the learning behavior, teaching quality, teaching effectiveness, and teaching satisfaction of resident trainees compared to the control group, and the differences were statistically significant (P < 0.05). Conclusions: The combination of ACS-HIS imaging database and PBL teaching under MDT mode can significantly improve the quality and effectiveness of pediatric epilepsy imaging teaching, and change the learning behavior of trainees. And it is suitable for promotion in grassroots medical units to improve the imaging diagnosis level of pediatric epilepsy among grassroots medical personnel.
文摘土体的宏观性质主要受其微观结构和孔隙特征的影响。查明土体在冻融等外部条件影响下的微观演化规律对岩土工程研究具有重要意义。草炭土作为季节性冻土和特殊土,由于其腐殖质和植物纤维含量较高,具有较高的压缩性和较低的强度。因此,以草炭土为研究对象,通过土工试验、核磁共振(nuclear magnetic resonance,简称NMR)、X射线计算机断层扫描(computed tompography,简称CT)和扫描电子显微镜(scanning electron microscope,简称SEM)等方法研究了草炭土的微观结构、孔隙特征和冻融效应。基于岩土力学和核磁共振理论,完成CT切片和SEM的微观图像分割,以识别空气孔隙和储水孔隙。结合微观图像和成分分析,草炭土的微观结构揭示了有机质组分是能够容纳和传导水分的土壤基质。冻融后草炭土的孔径分布表现为中孔比例增加,孔隙总体数量显著增加。因此,量化微观参数表明冻融后草炭土的孔隙连通性增强,孔隙形状复杂程度降低,渗透性增强。通过对非饱和土理论计算的验证表明,核磁共振方法能够有效地表征冻融土渗透性的变化。研究成果可作为高有机质、高纤维含量土壤研究的基础,也可作为草炭土分布区工程建设的参数依据。
