In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with...In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with respect to K;（SCP）, K;（SCP） and K;（SCP） has the homotopy category of strongly copure projective acyclic complexes as a triangulated subcategory in some case.展开更多
The AEC (Architecture, Engineering, and Construction) industry is gradually shifting away from 2D CAD drawings and toward Building Information Modeling as a result of the fast development of science and technology (BI...The AEC (Architecture, Engineering, and Construction) industry is gradually shifting away from 2D CAD drawings and toward Building Information Modeling as a result of the fast development of science and technology (BIM). The BIM idea’s introduction emphasizes the need to specify a building in a single building model with adequate information to suit its different needs rather than defining it in fragmented documents. This research work aims to use the BIM 4D for the simulation of the construction sequence of a Swivel Bridge. For that, the software Revit was used to make the 3D model of the bridge, and the software Navisworks was used for the 4D construction simulation of the project. The results demonstrated that BIM technology could help reduce delays and problems with the schedule and improve communication among stakeholders, and BIM visualization and simulation features were very useful compared to traditional planning methods.展开更多
驱动臂是驱动液滑环与浮式生产储油轮(floating production storage and offloading,FPSO)之间发生相对转动的重要连接组件,避免连接传递偏心荷载引发密封失效是该装置的设计关键。依托南海奋进号FPSO液滑环的国产化项目,本文设计了一...驱动臂是驱动液滑环与浮式生产储油轮(floating production storage and offloading,FPSO)之间发生相对转动的重要连接组件,避免连接传递偏心荷载引发密封失效是该装置的设计关键。依托南海奋进号FPSO液滑环的国产化项目,本文设计了一种多点铰接形式的柔性连接驱动臂,通过有限元分析校核了驱动臂设计结构的静态强度和疲劳强度。通过开展驱动臂的动态摇摆与旋转试验,验证了往复摆动工况下驱动臂的驱动功能与载荷传递性能,为FPSO单点系泊液滑环的国产化提供了重要参考。展开更多
文摘In this paper, we study the homotopy category of unbounded complexes of strongly copure projective modules with bounded relative homologies K;（SCP）.We show that the existence of a right recollement of K;（SCP） with respect to K;（SCP）, K;（SCP） and K;（SCP） has the homotopy category of strongly copure projective acyclic complexes as a triangulated subcategory in some case.
文摘The AEC (Architecture, Engineering, and Construction) industry is gradually shifting away from 2D CAD drawings and toward Building Information Modeling as a result of the fast development of science and technology (BIM). The BIM idea’s introduction emphasizes the need to specify a building in a single building model with adequate information to suit its different needs rather than defining it in fragmented documents. This research work aims to use the BIM 4D for the simulation of the construction sequence of a Swivel Bridge. For that, the software Revit was used to make the 3D model of the bridge, and the software Navisworks was used for the 4D construction simulation of the project. The results demonstrated that BIM technology could help reduce delays and problems with the schedule and improve communication among stakeholders, and BIM visualization and simulation features were very useful compared to traditional planning methods.
文摘驱动臂是驱动液滑环与浮式生产储油轮(floating production storage and offloading,FPSO)之间发生相对转动的重要连接组件,避免连接传递偏心荷载引发密封失效是该装置的设计关键。依托南海奋进号FPSO液滑环的国产化项目,本文设计了一种多点铰接形式的柔性连接驱动臂,通过有限元分析校核了驱动臂设计结构的静态强度和疲劳强度。通过开展驱动臂的动态摇摆与旋转试验,验证了往复摆动工况下驱动臂的驱动功能与载荷传递性能,为FPSO单点系泊液滑环的国产化提供了重要参考。
