The instability of continental slopes damages marine engineering equipment,such as submarine pipelines,resulting in the generation of tsunamis,which endangers the safety of nearshore personnel.Therefore,research on th...The instability of continental slopes damages marine engineering equipment,such as submarine pipelines,resulting in the generation of tsunamis,which endangers the safety of nearshore personnel.Therefore,research on the instability of continental slopes where submarine landslides usually occur is crucial to the risk evaluation of deepwater drilling.Previous studies were mainly based on simplified 2D and 3D models,which extend the 2D model applied on submarine slopes with complex topography.In this study,a numerical model with bathymetric data from the Qiongdongnan Basin was established.Furthermore,3D slope stability analysis and static and dynamic analyses were conducted.The static analysis found two discussions where slopes are most likely to occur.Through the analysis of different seismic forces,the dynamic result showed that an instability area is added to the two positions where the static analysis is unstable.Topography scatters and transmits seismic waves and controls the accumulation and diffusion of seismic energy.3D calculations and analysis revealed that the direction of slope instability is closely related to terrain inclination,slope,terrain effect,and terrain curvature.Data showed that instability situations could not be derived from a single direction or profile data.Such situations are an important factor in slope stability analysis and are critical to the prediction and evaluation of marine geological disasters.展开更多
目的:评价2型糖尿病病人在饮食管理过程中的问题与真实体验,以期为医护人员给予2型糖尿病病人提供针对性的饮食干预措施提供参考依据。方法:检索PubMed、MedLine、EMbase、the Cochrane Library、Web of Science、中国知网(CNKI)、万方...目的:评价2型糖尿病病人在饮食管理过程中的问题与真实体验,以期为医护人员给予2型糖尿病病人提供针对性的饮食干预措施提供参考依据。方法:检索PubMed、MedLine、EMbase、the Cochrane Library、Web of Science、中国知网(CNKI)、万方数据库(WanFang Database)、维普数据库(VIP)、中国生物医学文献数据库(CBM)中关于2型糖尿病病人饮食管理的质性研究文献,检索时间为建库至2021年4月,使用2016版澳大利亚JBI(Joanna Briggs Institute, JBI)循证卫生保健中心质性研究质量评价标准对文献进行评价,采用Meta整合方法对文献研究结果进行整合分析。结果:共纳入16篇质性研究,提炼出74个完整的研究结果,归纳出9个新的类别,得出3个整合结果,即饮食管理对2型糖尿病病人造成的负担(身体不适应、心理负担)、饮食管理的促进因素(益处发现、健康素养、多元化支持照护)、饮食管理的阻碍因素(饮食习惯和偏好、家庭环境、社会角色、认知和文化差异)。结论:现有证据表明,2型糖尿病饮食管理给病人身体、心理、生活、工作等都带来了一定的影响,医护人员和家属应多关注病人在饮食管理中的真实想法和需求,给予针对性的指导和帮助,增加病人饮食管理的信心和依从性。展开更多
基金This study was supported by the National Key Research and Development Program of China(No.2019YFC0312301)the Nation Natural Science Foundation of China(No.U1701245).
文摘The instability of continental slopes damages marine engineering equipment,such as submarine pipelines,resulting in the generation of tsunamis,which endangers the safety of nearshore personnel.Therefore,research on the instability of continental slopes where submarine landslides usually occur is crucial to the risk evaluation of deepwater drilling.Previous studies were mainly based on simplified 2D and 3D models,which extend the 2D model applied on submarine slopes with complex topography.In this study,a numerical model with bathymetric data from the Qiongdongnan Basin was established.Furthermore,3D slope stability analysis and static and dynamic analyses were conducted.The static analysis found two discussions where slopes are most likely to occur.Through the analysis of different seismic forces,the dynamic result showed that an instability area is added to the two positions where the static analysis is unstable.Topography scatters and transmits seismic waves and controls the accumulation and diffusion of seismic energy.3D calculations and analysis revealed that the direction of slope instability is closely related to terrain inclination,slope,terrain effect,and terrain curvature.Data showed that instability situations could not be derived from a single direction or profile data.Such situations are an important factor in slope stability analysis and are critical to the prediction and evaluation of marine geological disasters.
文摘目的:评价2型糖尿病病人在饮食管理过程中的问题与真实体验,以期为医护人员给予2型糖尿病病人提供针对性的饮食干预措施提供参考依据。方法:检索PubMed、MedLine、EMbase、the Cochrane Library、Web of Science、中国知网(CNKI)、万方数据库(WanFang Database)、维普数据库(VIP)、中国生物医学文献数据库(CBM)中关于2型糖尿病病人饮食管理的质性研究文献,检索时间为建库至2021年4月,使用2016版澳大利亚JBI(Joanna Briggs Institute, JBI)循证卫生保健中心质性研究质量评价标准对文献进行评价,采用Meta整合方法对文献研究结果进行整合分析。结果:共纳入16篇质性研究,提炼出74个完整的研究结果,归纳出9个新的类别,得出3个整合结果,即饮食管理对2型糖尿病病人造成的负担(身体不适应、心理负担)、饮食管理的促进因素(益处发现、健康素养、多元化支持照护)、饮食管理的阻碍因素(饮食习惯和偏好、家庭环境、社会角色、认知和文化差异)。结论:现有证据表明,2型糖尿病饮食管理给病人身体、心理、生活、工作等都带来了一定的影响,医护人员和家属应多关注病人在饮食管理中的真实想法和需求,给予针对性的指导和帮助,增加病人饮食管理的信心和依从性。
