In the research, the definition of production system of integrated agriculture was proposed, and the theoretical basis （system theory, information theory, cybernetics and operational research） and the key technologi...In the research, the definition of production system of integrated agriculture was proposed, and the theoretical basis （system theory, information theory, cybernetics and operational research） and the key technologies were analyzed. Furthermore, IDEFO of production system of integrated agriculture was established and the constituents of different subsystems were analyzed. In addition, the components of the integrated platform, involving operational system, network, distributed database, communication services, information services, development tools, management and application services and platform entrance, were discussed. In agricultural integrated system, relationship among subsystems should be well considered under guidance of system theory in order to better improve controllability and productivity of agricultural activity.展开更多
This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension l...This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension leg plat-form (TLP) and semi-submersibles. Emphases are put on analysis software,geometric and mass modeling,hydro-dynamic loading and its mapping,and analysis procedures. In addition,for the in-place analysis using structure analysis computer system (SACS),the procedure of Visual Basic for Application (VBA) is developed to map AQWA-LINE hydrodynamic loading to the SACS integrated hull/topsides model;for the in-place analysis using structure engineering system analysis model (SESAM),many computer aided applications are made to aid the post-processing. These applications have been used in structural analyses for a few TLP and semi-submersible plat-form topsides,and are briefly introduced in this paper.展开更多
文摘In the research, the definition of production system of integrated agriculture was proposed, and the theoretical basis （system theory, information theory, cybernetics and operational research） and the key technologies were analyzed. Furthermore, IDEFO of production system of integrated agriculture was established and the constituents of different subsystems were analyzed. In addition, the components of the integrated platform, involving operational system, network, distributed database, communication services, information services, development tools, management and application services and platform entrance, were discussed. In agricultural integrated system, relationship among subsystems should be well considered under guidance of system theory in order to better improve controllability and productivity of agricultural activity.
文摘This paper presents some insights on the state-of-the-art practice that has been utilized recently in the inplace structural strength and fatigue analysis for topsides on deepwater floating platforms such as tension leg plat-form (TLP) and semi-submersibles. Emphases are put on analysis software,geometric and mass modeling,hydro-dynamic loading and its mapping,and analysis procedures. In addition,for the in-place analysis using structure analysis computer system (SACS),the procedure of Visual Basic for Application (VBA) is developed to map AQWA-LINE hydrodynamic loading to the SACS integrated hull/topsides model;for the in-place analysis using structure engineering system analysis model (SESAM),many computer aided applications are made to aid the post-processing. These applications have been used in structural analyses for a few TLP and semi-submersible plat-form topsides,and are briefly introduced in this paper.
